./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/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_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1dc3813f801c08c10697b6f3aeaa3afb846521f0bb73d940036cc656d8340c66 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 02:52:21,649 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 02:52:21,761 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-14 02:52:21,774 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 02:52:21,774 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 02:52:21,822 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 02:52:21,824 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 02:52:21,824 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 02:52:21,825 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 02:52:21,826 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 02:52:21,826 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 02:52:21,827 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 02:52:21,827 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 02:52:21,827 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 02:52:21,828 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 02:52:21,828 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 02:52:21,828 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 02:52:21,828 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 02:52:21,829 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 02:52:21,829 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 02:52:21,829 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 02:52:21,829 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 02:52:21,830 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 02:52:21,830 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 02:52:21,830 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 02:52:21,831 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 02:52:21,831 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 02:52:21,832 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 02:52:21,832 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 02:52:21,832 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 02:52:21,832 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 02:52:21,832 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 02:52:21,832 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 02:52:21,832 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 02:52:21,833 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 02:52:21,833 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 02:52:21,833 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 02:52:21,833 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 02:52:21,834 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 02:52:21,834 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 02:52:21,834 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 02:52:21,834 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:52:21,835 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 02:52:21,835 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 02:52:21,835 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 02:52:21,835 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 02:52:21,835 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 02:52:21,835 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 02:52:21,835 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 02:52:21,835 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_51a8c131-1246-4a92-9631-a8c17579ade2/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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> 1dc3813f801c08c10697b6f3aeaa3afb846521f0bb73d940036cc656d8340c66 [2024-11-14 02:52:22,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 02:52:22,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 02:52:22,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 02:52:22,245 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 02:52:22,246 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 02:52:22,248 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i Unable to find full path for "g++" [2024-11-14 02:52:24,586 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 02:52:24,865 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 02:52:24,866 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i [2024-11-14 02:52:24,874 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/data/9a6540e3d/d20bc4148e9d41b8b83a800940edc17e/FLAGad2a3d6e0 [2024-11-14 02:52:24,892 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/data/9a6540e3d/d20bc4148e9d41b8b83a800940edc17e [2024-11-14 02:52:24,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 02:52:24,896 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 02:52:24,898 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 02:52:24,898 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 02:52:24,903 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 02:52:24,904 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:52:24" (1/1) ... [2024-11-14 02:52:24,905 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21e63c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:52:24, skipping insertion in model container [2024-11-14 02:52:24,905 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:52:24" (1/1) ... [2024-11-14 02:52:24,923 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 02:52:25,173 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:52:25,188 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 02:52:25,215 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:52:25,234 INFO L204 MainTranslator]: Completed translation [2024-11-14 02:52:25,235 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:52:25 WrapperNode [2024-11-14 02:52:25,235 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 02:52:25,236 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 02:52:25,236 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 02:52:25,236 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 02:52:25,243 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:52:25" (1/1) ... [2024-11-14 02:52:25,250 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:52:25" (1/1) ... [2024-11-14 02:52:25,269 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2024-11-14 02:52:25,269 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 02:52:25,270 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 02:52:25,270 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 02:52:25,270 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 02:52:25,276 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:52:25" (1/1) ... [2024-11-14 02:52:25,277 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:52:25" (1/1) ... [2024-11-14 02:52:25,278 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:52:25" (1/1) ... [2024-11-14 02:52:25,279 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:52:25" (1/1) ... [2024-11-14 02:52:25,285 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:52:25" (1/1) ... [2024-11-14 02:52:25,289 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:52:25" (1/1) ... [2024-11-14 02:52:25,291 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:52:25" (1/1) ... [2024-11-14 02:52:25,292 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:52:25" (1/1) ... [2024-11-14 02:52:25,294 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 02:52:25,295 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 02:52:25,295 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 02:52:25,295 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 02:52:25,296 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:52:25" (1/1) ... [2024-11-14 02:52:25,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:52:25,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:52:25,336 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 02:52:25,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 02:52:25,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 02:52:25,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 02:52:25,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 02:52:25,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 02:52:25,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 02:52:25,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 02:52:25,365 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 02:52:25,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 02:52:25,448 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 02:52:25,451 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 02:52:25,755 INFO L? ?]: Removed 38 outVars from TransFormulas that were not future-live. [2024-11-14 02:52:25,755 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 02:52:25,835 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 02:52:25,835 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-14 02:52:25,835 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:52:25 BoogieIcfgContainer [2024-11-14 02:52:25,835 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 02:52:25,839 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 02:52:25,839 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 02:52:25,845 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 02:52:25,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 02:52:24" (1/3) ... [2024-11-14 02:52:25,846 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d7a1ca4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:52:25, skipping insertion in model container [2024-11-14 02:52:25,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:52:25" (2/3) ... [2024-11-14 02:52:25,847 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d7a1ca4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:52:25, skipping insertion in model container [2024-11-14 02:52:25,847 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:52:25" (3/3) ... [2024-11-14 02:52:25,848 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcpy_ground-2.i [2024-11-14 02:52:25,872 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 02:52:25,875 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG standard_strcpy_ground-2.i that has 1 procedures, 32 locations, 1 initial locations, 3 loop locations, and 14 error locations. [2024-11-14 02:52:25,954 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 02:52:25,974 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=None, 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;@25348238, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 02:52:25,974 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-11-14 02:52:25,979 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 17 states have (on average 2.176470588235294) internal successors, (37), 31 states have internal predecessors, (37), 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 02:52:25,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 02:52:25,986 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:52:25,987 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 02:52:25,988 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-14 02:52:25,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:52:25,994 INFO L85 PathProgramCache]: Analyzing trace with hash 109876, now seen corresponding path program 1 times [2024-11-14 02:52:26,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:52:26,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188705103] [2024-11-14 02:52:26,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:52:26,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:52:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:52:26,359 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 02:52:26,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:52:26,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188705103] [2024-11-14 02:52:26,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188705103] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:52:26,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:52:26,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 02:52:26,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451222470] [2024-11-14 02:52:26,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:52:26,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:52:26,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:52:26,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:52:26,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:52:26,410 INFO L87 Difference]: Start difference. First operand has 32 states, 17 states have (on average 2.176470588235294) internal successors, (37), 31 states have internal predecessors, (37), 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, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 02:52:26,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:52:26,491 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2024-11-14 02:52:26,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:52:26,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2024-11-14 02:52:26,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:52:26,502 INFO L225 Difference]: With dead ends: 27 [2024-11-14 02:52:26,503 INFO L226 Difference]: Without dead ends: 26 [2024-11-14 02:52:26,505 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 02:52:26,510 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:52:26,512 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 12 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:52:26,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-14 02:52:26,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-14 02:52:26,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.75) internal successors, (28), 25 states have internal predecessors, (28), 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 02:52:26,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2024-11-14 02:52:26,551 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 3 [2024-11-14 02:52:26,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:52:26,552 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2024-11-14 02:52:26,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 02:52:26,552 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2024-11-14 02:52:26,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 02:52:26,552 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:52:26,553 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 02:52:26,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 02:52:26,553 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-14 02:52:26,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:52:26,554 INFO L85 PathProgramCache]: Analyzing trace with hash 109877, now seen corresponding path program 1 times [2024-11-14 02:52:26,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:52:26,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938893424] [2024-11-14 02:52:26,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:52:26,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:52:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:52:26,799 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 02:52:26,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:52:26,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938893424] [2024-11-14 02:52:26,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938893424] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:52:26,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:52:26,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 02:52:26,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608101288] [2024-11-14 02:52:26,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:52:26,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:52:26,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:52:26,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:52:26,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:52:26,802 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 02:52:26,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:52:26,881 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2024-11-14 02:52:26,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:52:26,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2024-11-14 02:52:26,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:52:26,883 INFO L225 Difference]: With dead ends: 28 [2024-11-14 02:52:26,883 INFO L226 Difference]: Without dead ends: 28 [2024-11-14 02:52:26,883 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 02:52:26,884 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:52:26,884 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:52:26,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-14 02:52:26,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-14 02:52:26,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 27 states have internal predecessors, (30), 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 02:52:26,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2024-11-14 02:52:26,894 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 3 [2024-11-14 02:52:26,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:52:26,894 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2024-11-14 02:52:26,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 02:52:26,895 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2024-11-14 02:52:26,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 02:52:26,895 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:52:26,895 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2024-11-14 02:52:26,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 02:52:26,895 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-14 02:52:26,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:52:26,896 INFO L85 PathProgramCache]: Analyzing trace with hash 105658429, now seen corresponding path program 1 times [2024-11-14 02:52:26,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:52:26,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341752789] [2024-11-14 02:52:26,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:52:26,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:52:26,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:52:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:52:27,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:52:27,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341752789] [2024-11-14 02:52:27,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341752789] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:52:27,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887184488] [2024-11-14 02:52:27,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:52:27,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:52:27,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:52:27,196 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:52:27,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 02:52:27,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:52:27,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 02:52:27,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:52:27,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-14 02:52:27,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:52:27,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 02:52:27,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:52:27,543 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:52:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:52:27,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887184488] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:52:27,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [762025120] [2024-11-14 02:52:27,673 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2024-11-14 02:52:27,673 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:52:27,678 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:52:27,687 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:52:27,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:52:28,364 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:52:28,548 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '181#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet1#1|)) (<= |ULTIMATE.start_main_#t~nondet1#1| 2147483647) (exists ((|v_ULTIMATE.start_main_~#src~0#1.base_30| Int) (|v_ULTIMATE.start_main_~i~0#1_47| Int)) (and (<= 2 |v_ULTIMATE.start_main_~#src~0#1.base_30|) (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_~i~0#1_47| 99999) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 0 |v_ULTIMATE.start_main_~i~0#1_47|) (<= (select |#length| |v_ULTIMATE.start_main_~#src~0#1.base_30|) (+ 3 (* |v_ULTIMATE.start_main_~i~0#1_47| 4))))))' at error location [2024-11-14 02:52:28,548 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:52:28,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:52:28,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-11-14 02:52:28,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053224309] [2024-11-14 02:52:28,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:52:28,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 02:52:28,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:52:28,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 02:52:28,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-14 02:52:28,550 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) 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 02:52:28,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:52:28,684 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2024-11-14 02:52:28,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 02:52:28,685 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) 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 5 [2024-11-14 02:52:28,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:52:28,687 INFO L225 Difference]: With dead ends: 33 [2024-11-14 02:52:28,687 INFO L226 Difference]: Without dead ends: 33 [2024-11-14 02:52:28,687 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-14 02:52:28,689 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:52:28,690 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 24 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:52:28,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-14 02:52:28,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-14 02:52:28,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 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 02:52:28,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-11-14 02:52:28,697 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 5 [2024-11-14 02:52:28,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:52:28,698 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-11-14 02:52:28,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) 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 02:52:28,699 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-11-14 02:52:28,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 02:52:28,700 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:52:28,700 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2024-11-14 02:52:28,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-14 02:52:28,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:52:28,905 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-14 02:52:28,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:52:28,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1541395681, now seen corresponding path program 1 times [2024-11-14 02:52:28,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:52:28,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366911972] [2024-11-14 02:52:28,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:52:28,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:52:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:52:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:52:29,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:52:29,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366911972] [2024-11-14 02:52:29,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366911972] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:52:29,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366456250] [2024-11-14 02:52:29,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:52:29,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:52:29,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:52:29,086 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:52:29,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 02:52:29,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:52:29,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 02:52:29,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:52:29,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:52:29,209 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:52:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:52:29,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366456250] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:52:29,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1601858421] [2024-11-14 02:52:29,272 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2024-11-14 02:52:29,273 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:52:29,273 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:52:29,273 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:52:29,273 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:52:29,631 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:52:29,863 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '299#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (exists ((|v_ULTIMATE.start_main_~#src~0#1.base_31| Int)) (and (<= 2 |v_ULTIMATE.start_main_~#src~0#1.base_31|) (<= (select |#length| |v_ULTIMATE.start_main_~#src~0#1.base_31|) 3))))' at error location [2024-11-14 02:52:29,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:52:29,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:52:29,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2024-11-14 02:52:29,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714462622] [2024-11-14 02:52:29,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:52:29,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 02:52:29,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:52:29,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 02:52:29,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-11-14 02:52:29,865 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 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 02:52:30,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:52:30,228 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2024-11-14 02:52:30,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 02:52:30,228 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 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 02:52:30,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:52:30,230 INFO L225 Difference]: With dead ends: 138 [2024-11-14 02:52:30,230 INFO L226 Difference]: Without dead ends: 138 [2024-11-14 02:52:30,230 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2024-11-14 02:52:30,231 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 331 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:52:30,231 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 68 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:52:30,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-14 02:52:30,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 37. [2024-11-14 02:52:30,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 36 states have internal predecessors, (40), 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 02:52:30,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2024-11-14 02:52:30,248 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 7 [2024-11-14 02:52:30,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:52:30,248 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2024-11-14 02:52:30,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 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 02:52:30,249 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2024-11-14 02:52:30,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 02:52:30,250 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:52:30,250 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 1, 1] [2024-11-14 02:52:30,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 02:52:30,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:52:30,454 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-14 02:52:30,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:52:30,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1824918869, now seen corresponding path program 2 times [2024-11-14 02:52:30,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:52:30,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008639539] [2024-11-14 02:52:30,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:52:30,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:52:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:52:30,749 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:52:30,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:52:30,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008639539] [2024-11-14 02:52:30,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008639539] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:52:30,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518806566] [2024-11-14 02:52:30,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:52:30,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:52:30,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:52:30,757 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:52:30,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 02:52:30,838 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 02:52:30,839 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:52:30,841 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 02:52:30,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:52:30,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-14 02:52:30,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:52:30,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 02:52:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 02:52:31,042 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:52:31,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518806566] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:52:31,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:52:31,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2024-11-14 02:52:31,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354556216] [2024-11-14 02:52:31,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:52:31,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 02:52:31,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:52:31,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 02:52:31,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-14 02:52:31,044 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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 02:52:31,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:52:31,115 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2024-11-14 02:52:31,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 02:52:31,116 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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 11 [2024-11-14 02:52:31,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:52:31,116 INFO L225 Difference]: With dead ends: 36 [2024-11-14 02:52:31,116 INFO L226 Difference]: Without dead ends: 36 [2024-11-14 02:52:31,117 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-14 02:52:31,117 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:52:31,118 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 23 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:52:31,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-14 02:52:31,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-14 02:52:31,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 35 states have internal predecessors, (38), 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 02:52:31,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2024-11-14 02:52:31,122 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 11 [2024-11-14 02:52:31,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:52:31,122 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2024-11-14 02:52:31,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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 02:52:31,122 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2024-11-14 02:52:31,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-14 02:52:31,122 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:52:31,123 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2024-11-14 02:52:31,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 02:52:31,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:52:31,323 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-14 02:52:31,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:52:31,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1462685764, now seen corresponding path program 1 times [2024-11-14 02:52:31,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:52:31,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430326911] [2024-11-14 02:52:31,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:52:31,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:52:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:52:31,456 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 02:52:31,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:52:31,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430326911] [2024-11-14 02:52:31,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430326911] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:52:31,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:52:31,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 02:52:31,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039858003] [2024-11-14 02:52:31,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:52:31,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:52:31,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:52:31,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:52:31,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:52:31,458 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:52:31,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:52:31,494 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2024-11-14 02:52:31,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:52:31,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-14 02:52:31,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:52:31,495 INFO L225 Difference]: With dead ends: 34 [2024-11-14 02:52:31,495 INFO L226 Difference]: Without dead ends: 34 [2024-11-14 02:52:31,495 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 02:52:31,496 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:52:31,497 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 12 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:52:31,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-14 02:52:31,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-14 02:52:31,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 33 states have internal predecessors, (36), 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 02:52:31,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2024-11-14 02:52:31,501 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 18 [2024-11-14 02:52:31,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:52:31,501 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2024-11-14 02:52:31,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:52:31,501 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2024-11-14 02:52:31,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-14 02:52:31,502 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:52:31,502 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2024-11-14 02:52:31,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 02:52:31,502 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-14 02:52:31,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:52:31,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1462685765, now seen corresponding path program 1 times [2024-11-14 02:52:31,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:52:31,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99561564] [2024-11-14 02:52:31,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:52:31,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:52:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:52:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:52:31,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:52:31,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99561564] [2024-11-14 02:52:31,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99561564] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:52:31,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655923495] [2024-11-14 02:52:31,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:52:31,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:52:31,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:52:31,751 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:52:31,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 02:52:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:52:31,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:52:31,852 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:52:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:52:31,900 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:52:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:52:32,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655923495] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:52:32,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1148210945] [2024-11-14 02:52:32,080 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 02:52:32,080 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:52:32,080 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:52:32,080 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:52:32,080 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:52:32,377 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:52:32,687 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '790#(and (<= 1 |#StackHeapBarrier|) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (exists ((|v_ULTIMATE.start_main_~#dst~0#1.base_22| Int)) (and (<= 2 |v_ULTIMATE.start_main_~#dst~0#1.base_22|) (<= (select |#length| |v_ULTIMATE.start_main_~#dst~0#1.base_22|) 3))) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) 0) 0)) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 4 (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) 0) |ULTIMATE.start_main_#t~mem4#1|))' at error location [2024-11-14 02:52:32,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:52:32,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:52:32,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-11-14 02:52:32,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175324932] [2024-11-14 02:52:32,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:52:32,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 02:52:32,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:52:32,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 02:52:32,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=332, Unknown=0, NotChecked=0, Total=552 [2024-11-14 02:52:32,690 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 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 02:52:33,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:52:33,039 INFO L93 Difference]: Finished difference Result 259 states and 316 transitions. [2024-11-14 02:52:33,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 02:52:33,040 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 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 02:52:33,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:52:33,042 INFO L225 Difference]: With dead ends: 259 [2024-11-14 02:52:33,045 INFO L226 Difference]: Without dead ends: 259 [2024-11-14 02:52:33,046 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=332, Unknown=0, NotChecked=0, Total=552 [2024-11-14 02:52:33,047 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 407 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 02:52:33,047 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 165 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 02:52:33,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-11-14 02:52:33,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 50. [2024-11-14 02:52:33,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 49 states have internal predecessors, (52), 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 02:52:33,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2024-11-14 02:52:33,063 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 18 [2024-11-14 02:52:33,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:52:33,067 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2024-11-14 02:52:33,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 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 02:52:33,067 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2024-11-14 02:52:33,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 02:52:33,068 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:52:33,068 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2024-11-14 02:52:33,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 02:52:33,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:52:33,269 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-14 02:52:33,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:52:33,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1143232507, now seen corresponding path program 2 times [2024-11-14 02:52:33,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:52:33,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340377797] [2024-11-14 02:52:33,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:52:33,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:52:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:52:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:52:33,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:52:33,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340377797] [2024-11-14 02:52:33,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340377797] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:52:33,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851672942] [2024-11-14 02:52:33,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:52:33,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:52:33,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:52:33,872 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:52:33,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 02:52:33,970 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-14 02:52:33,970 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:52:33,971 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 02:52:33,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:52:33,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-14 02:52:34,227 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-14 02:52:34,228 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:52:34,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851672942] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:52:34,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:52:34,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [16] total 18 [2024-11-14 02:52:34,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838094396] [2024-11-14 02:52:34,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:52:34,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 02:52:34,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:52:34,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 02:52:34,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2024-11-14 02:52:34,231 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:52:34,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:52:34,298 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2024-11-14 02:52:34,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 02:52:34,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-14 02:52:34,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:52:34,300 INFO L225 Difference]: With dead ends: 63 [2024-11-14 02:52:34,300 INFO L226 Difference]: Without dead ends: 63 [2024-11-14 02:52:34,300 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2024-11-14 02:52:34,301 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 29 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:52:34,301 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 17 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:52:34,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-14 02:52:34,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2024-11-14 02:52:34,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 52 states have internal predecessors, (56), 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 02:52:34,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2024-11-14 02:52:34,314 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 34 [2024-11-14 02:52:34,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:52:34,314 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2024-11-14 02:52:34,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:52:34,315 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2024-11-14 02:52:34,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 02:52:34,316 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:52:34,316 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:52:34,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 02:52:34,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:52:34,520 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-14 02:52:34,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:52:34,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1080518867, now seen corresponding path program 1 times [2024-11-14 02:52:34,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:52:34,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151090223] [2024-11-14 02:52:34,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:52:34,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:52:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:52:34,672 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-14 02:52:34,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:52:34,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151090223] [2024-11-14 02:52:34,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151090223] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:52:34,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:52:34,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 02:52:34,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167439767] [2024-11-14 02:52:34,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:52:34,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 02:52:34,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:52:34,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 02:52:34,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:52:34,674 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 02:52:34,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:52:34,729 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2024-11-14 02:52:34,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 02:52:34,730 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 02:52:34,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:52:34,730 INFO L225 Difference]: With dead ends: 55 [2024-11-14 02:52:34,730 INFO L226 Difference]: Without dead ends: 55 [2024-11-14 02:52:34,730 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 02:52:34,731 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:52:34,731 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 31 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:52:34,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-14 02:52:34,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-14 02:52:34,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.183673469387755) internal successors, (58), 54 states have internal predecessors, (58), 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 02:52:34,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2024-11-14 02:52:34,741 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 35 [2024-11-14 02:52:34,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:52:34,741 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2024-11-14 02:52:34,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 02:52:34,742 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2024-11-14 02:52:34,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 02:52:34,742 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:52:34,743 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:52:34,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 02:52:34,744 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-14 02:52:34,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:52:34,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1080517568, now seen corresponding path program 1 times [2024-11-14 02:52:34,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:52:34,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539216022] [2024-11-14 02:52:34,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:52:34,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:52:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:52:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:52:35,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:52:35,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539216022] [2024-11-14 02:52:35,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539216022] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:52:35,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007926762] [2024-11-14 02:52:35,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:52:35,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:52:35,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:52:35,247 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:52:35,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 02:52:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:52:35,388 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 02:52:35,390 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:52:35,468 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:52:35,468 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:52:36,065 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:52:36,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007926762] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:52:36,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1487693819] [2024-11-14 02:52:36,068 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 02:52:36,068 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:52:36,068 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:52:36,068 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:52:36,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:52:36,331 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:52:36,727 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1691#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_#valid_45| (Array Int Int)) (|v_ULTIMATE.start_main_~#dst~0#1.base_23| Int) (|v_ULTIMATE.start_main_~#src~0#1.base_32| Int)) (and (<= 2 |v_ULTIMATE.start_main_~#src~0#1.base_32|) (= (store (store |v_#valid_45| |v_ULTIMATE.start_main_~#src~0#1.base_32| 0) |v_ULTIMATE.start_main_~#dst~0#1.base_23| 0) |#valid|) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#src~0#1.base_32|) 0) 0) (<= 4 (select |#length| |v_ULTIMATE.start_main_~#src~0#1.base_32|)) (<= 2 |v_ULTIMATE.start_main_~#dst~0#1.base_23|) (= (select |v_#valid_45| |v_ULTIMATE.start_main_~#src~0#1.base_32|) 1))) (exists ((|v_ULTIMATE.start_main_old_#valid#1_10| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_10| |#valid|))) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-14 02:52:36,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:52:36,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:52:36,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2024-11-14 02:52:36,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211033454] [2024-11-14 02:52:36,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:52:36,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-14 02:52:36,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:52:36,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-14 02:52:36,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=676, Invalid=884, Unknown=0, NotChecked=0, Total=1560 [2024-11-14 02:52:36,733 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 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 02:52:37,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:52:37,594 INFO L93 Difference]: Finished difference Result 522 states and 641 transitions. [2024-11-14 02:52:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-14 02:52:37,596 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 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 02:52:37,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:52:37,601 INFO L225 Difference]: With dead ends: 522 [2024-11-14 02:52:37,601 INFO L226 Difference]: Without dead ends: 522 [2024-11-14 02:52:37,602 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=676, Invalid=884, Unknown=0, NotChecked=0, Total=1560 [2024-11-14 02:52:37,603 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 1422 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1422 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 02:52:37,603 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1422 Valid, 324 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 02:52:37,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2024-11-14 02:52:37,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 87. [2024-11-14 02:52:37,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 86 states have internal predecessors, (90), 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 02:52:37,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2024-11-14 02:52:37,622 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 35 [2024-11-14 02:52:37,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:52:37,622 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2024-11-14 02:52:37,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 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 02:52:37,622 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2024-11-14 02:52:37,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-14 02:52:37,624 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:52:37,624 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:52:37,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-14 02:52:37,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 02:52:37,825 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-14 02:52:37,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:52:37,825 INFO L85 PathProgramCache]: Analyzing trace with hash 555441344, now seen corresponding path program 2 times [2024-11-14 02:52:37,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:52:37,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448075448] [2024-11-14 02:52:37,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:52:37,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:52:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:52:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:52:39,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:52:39,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448075448] [2024-11-14 02:52:39,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448075448] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:52:39,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146628113] [2024-11-14 02:52:39,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:52:39,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:52:39,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:52:39,240 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:52:39,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 02:52:39,360 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-14 02:52:39,360 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:52:39,361 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 02:52:39,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:52:40,144 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#dst~0#1.base_24| Int) (|v_ULTIMATE.start_main_~#src~0#1.base_33| Int) (v_DerPreprocessor_2 Int) (v_DerPreprocessor_1 Int)) (and (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_33| 0) |v_ULTIMATE.start_main_~#dst~0#1.base_24| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#dst~0#1.base_24|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_33|) 0) (= (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_33| v_DerPreprocessor_1) |v_ULTIMATE.start_main_~#dst~0#1.base_24| v_DerPreprocessor_2) |v_ULTIMATE.start_main_~#src~0#1.base_33|) v_DerPreprocessor_1))) is different from true [2024-11-14 02:52:40,146 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2024-11-14 02:52:40,146 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:52:40,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146628113] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:52:40,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:52:40,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [32] total 35 [2024-11-14 02:52:40,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972612481] [2024-11-14 02:52:40,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:52:40,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 02:52:40,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:52:40,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 02:52:40,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=657, Unknown=1, NotChecked=66, Total=1260 [2024-11-14 02:52:40,149 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 02:52:40,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:52:40,230 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2024-11-14 02:52:40,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 02:52:40,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 67 [2024-11-14 02:52:40,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:52:40,231 INFO L225 Difference]: With dead ends: 86 [2024-11-14 02:52:40,231 INFO L226 Difference]: Without dead ends: 83 [2024-11-14 02:52:40,232 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=536, Invalid=657, Unknown=1, NotChecked=66, Total=1260 [2024-11-14 02:52:40,233 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:52:40,233 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 9 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 22 Unchecked, 0.0s Time] [2024-11-14 02:52:40,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-14 02:52:40,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-11-14 02:52:40,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0897435897435896) internal successors, (85), 82 states have internal predecessors, (85), 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 02:52:40,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2024-11-14 02:52:40,237 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 67 [2024-11-14 02:52:40,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:52:40,238 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2024-11-14 02:52:40,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 02:52:40,238 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2024-11-14 02:52:40,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-14 02:52:40,240 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:52:40,240 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:52:40,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 02:52:40,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 02:52:40,444 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-14 02:52:40,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:52:40,445 INFO L85 PathProgramCache]: Analyzing trace with hash 555491137, now seen corresponding path program 1 times [2024-11-14 02:52:40,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:52:40,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162539783] [2024-11-14 02:52:40,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:52:40,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:52:40,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:52:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:52:41,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:52:41,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162539783] [2024-11-14 02:52:41,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162539783] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:52:41,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842635272] [2024-11-14 02:52:41,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:52:41,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:52:41,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:52:41,862 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:52:41,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 02:52:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:52:42,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-14 02:52:42,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:52:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:52:42,186 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:52:43,827 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:52:43,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842635272] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:52:43,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [885660709] [2024-11-14 02:52:43,830 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 02:52:43,830 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:52:43,830 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:52:43,830 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:52:43,830 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:52:44,209 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:52:44,508 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3172#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|))' at error location [2024-11-14 02:52:44,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:52:44,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:52:44,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 64 [2024-11-14 02:52:44,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805036836] [2024-11-14 02:52:44,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:52:44,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-14 02:52:44,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:52:44,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-14 02:52:44,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2094, Invalid=2598, Unknown=0, NotChecked=0, Total=4692 [2024-11-14 02:52:44,515 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 65 states, 65 states have (on average 2.0307692307692307) internal successors, (132), 64 states have internal predecessors, (132), 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 02:52:47,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:52:47,112 INFO L93 Difference]: Finished difference Result 1062 states and 1247 transitions. [2024-11-14 02:52:47,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-14 02:52:47,113 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0307692307692307) internal successors, (132), 64 states have internal predecessors, (132), 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 67 [2024-11-14 02:52:47,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:52:47,117 INFO L225 Difference]: With dead ends: 1062 [2024-11-14 02:52:47,117 INFO L226 Difference]: Without dead ends: 1062 [2024-11-14 02:52:47,118 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2094, Invalid=2598, Unknown=0, NotChecked=0, Total=4692 [2024-11-14 02:52:47,119 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 4154 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4154 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:52:47,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4154 Valid, 630 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 02:52:47,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2024-11-14 02:52:47,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 147. [2024-11-14 02:52:47,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0492957746478873) internal successors, (149), 146 states have internal predecessors, (149), 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 02:52:47,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2024-11-14 02:52:47,132 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 67 [2024-11-14 02:52:47,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:52:47,132 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2024-11-14 02:52:47,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0307692307692307) internal successors, (132), 64 states have internal predecessors, (132), 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 02:52:47,132 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2024-11-14 02:52:47,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-14 02:52:47,134 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:52:47,134 INFO L215 NwaCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:52:47,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 02:52:47,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:52:47,338 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-14 02:52:47,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:52:47,339 INFO L85 PathProgramCache]: Analyzing trace with hash 2126225473, now seen corresponding path program 2 times [2024-11-14 02:52:47,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:52:47,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28203114] [2024-11-14 02:52:47,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:52:47,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:52:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:52:51,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3845 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:52:51,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:52:51,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28203114] [2024-11-14 02:52:51,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28203114] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:52:51,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071818601] [2024-11-14 02:52:51,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:52:51,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:52:51,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:52:51,925 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:52:51,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 02:52:52,093 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 02:52:52,093 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:52:52,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 02:52:52,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:52:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3845 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2024-11-14 02:52:52,490 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:52:52,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-14 02:52:52,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3845 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2024-11-14 02:52:52,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071818601] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:52:52,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1892853651] [2024-11-14 02:52:52,945 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 02:52:52,945 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:52:52,946 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:52:52,946 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:52:52,946 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:52:53,242 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:52:53,722 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5238#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|))' at error location [2024-11-14 02:52:53,722 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:52:53,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:52:53,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 4, 4] total 72 [2024-11-14 02:52:53,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529147743] [2024-11-14 02:52:53,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:52:53,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-14 02:52:53,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:52:53,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-14 02:52:53,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2323, Invalid=3529, Unknown=0, NotChecked=0, Total=5852 [2024-11-14 02:52:53,726 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 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 02:53:03,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:53:03,404 INFO L93 Difference]: Finished difference Result 1081 states and 1265 transitions. [2024-11-14 02:53:03,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2024-11-14 02:53:03,405 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 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 131 [2024-11-14 02:53:03,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:53:03,409 INFO L225 Difference]: With dead ends: 1081 [2024-11-14 02:53:03,409 INFO L226 Difference]: Without dead ends: 1081 [2024-11-14 02:53:03,418 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 378 SyntacticMatches, 2 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8931 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=12637, Invalid=26765, Unknown=0, NotChecked=0, Total=39402 [2024-11-14 02:53:03,419 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 6513 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6513 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:53:03,419 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6513 Valid, 470 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 02:53:03,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2024-11-14 02:53:03,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 158. [2024-11-14 02:53:03,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0718954248366013) internal successors, (164), 157 states have internal predecessors, (164), 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 02:53:03,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 164 transitions. [2024-11-14 02:53:03,432 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 164 transitions. Word has length 131 [2024-11-14 02:53:03,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:53:03,432 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 164 transitions. [2024-11-14 02:53:03,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 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 02:53:03,433 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 164 transitions. [2024-11-14 02:53:03,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-11-14 02:53:03,434 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:53:03,435 INFO L215 NwaCegarLoop]: trace histogram [63, 63, 2, 2, 2, 1, 1, 1, 1] [2024-11-14 02:53:03,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 02:53:03,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 02:53:03,639 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-14 02:53:03,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:53:03,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1064250363, now seen corresponding path program 1 times [2024-11-14 02:53:03,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:53:03,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931326745] [2024-11-14 02:53:03,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:53:03,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:53:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:53:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3973 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 02:53:07,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:53:07,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931326745] [2024-11-14 02:53:07,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931326745] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:53:07,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555415050] [2024-11-14 02:53:07,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:53:07,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:53:07,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:53:07,859 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:53:07,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 02:53:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:53:08,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-14 02:53:08,133 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:53:08,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3973 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 02:53:08,382 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:53:14,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3973 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 02:53:14,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555415050] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:53:14,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [944615243] [2024-11-14 02:53:14,175 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 02:53:14,175 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:53:14,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:53:14,175 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:53:14,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:53:14,463 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:53:15,124 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7666#(and (exists ((|v_ULTIMATE.start_main_~#dst~0#1.base_25| Int) (|v_ULTIMATE.start_main_~i~0#1_394| Int) (|v_ULTIMATE.start_main_~#dst~0#1.offset_21| Int)) (and (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |v_ULTIMATE.start_main_~i~0#1_394| 4))) (<= 1 |#StackHeapBarrier|) (<= (+ (* |v_ULTIMATE.start_main_~i~0#1_394| 4) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |v_ULTIMATE.start_main_~i~0#1_394|) (<= 2 |v_ULTIMATE.start_main_~#dst~0#1.base_25|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= (select |#length| |v_ULTIMATE.start_main_~#dst~0#1.base_25|) (+ (* |v_ULTIMATE.start_main_~i~0#1_394| 4) 3)) (= |v_ULTIMATE.start_main_~#dst~0#1.offset_21| 0))) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1))' at error location [2024-11-14 02:53:15,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:53:15,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:53:15,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2024-11-14 02:53:15,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835672236] [2024-11-14 02:53:15,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:53:15,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2024-11-14 02:53:15,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:53:15,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2024-11-14 02:53:15,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8526, Invalid=9564, Unknown=0, NotChecked=0, Total=18090 [2024-11-14 02:53:15,131 INFO L87 Difference]: Start difference. First operand 158 states and 164 transitions. Second operand has 131 states, 131 states have (on average 2.015267175572519) internal successors, (264), 130 states have internal predecessors, (264), 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 02:53:33,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:53:33,971 INFO L93 Difference]: Finished difference Result 2184 states and 2564 transitions. [2024-11-14 02:53:33,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2024-11-14 02:53:33,972 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.015267175572519) internal successors, (264), 130 states have internal predecessors, (264), 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 136 [2024-11-14 02:53:33,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:53:33,980 INFO L225 Difference]: With dead ends: 2184 [2024-11-14 02:53:33,980 INFO L226 Difference]: Without dead ends: 2184 [2024-11-14 02:53:33,982 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 334 SyntacticMatches, 4 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=8526, Invalid=9564, Unknown=0, NotChecked=0, Total=18090 [2024-11-14 02:53:33,983 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 7952 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7952 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-14 02:53:33,983 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7952 Valid, 1290 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [536 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-14 02:53:33,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2024-11-14 02:53:34,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 288. [2024-11-14 02:53:34,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 283 states have (on average 1.03886925795053) internal successors, (294), 287 states have internal predecessors, (294), 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 02:53:34,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 294 transitions. [2024-11-14 02:53:34,009 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 294 transitions. Word has length 136 [2024-11-14 02:53:34,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:53:34,009 INFO L471 AbstractCegarLoop]: Abstraction has 288 states and 294 transitions. [2024-11-14 02:53:34,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.015267175572519) internal successors, (264), 130 states have internal predecessors, (264), 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 02:53:34,010 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 294 transitions. [2024-11-14 02:53:34,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2024-11-14 02:53:34,013 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:53:34,013 INFO L215 NwaCegarLoop]: trace histogram [128, 128, 2, 2, 2, 1, 1, 1, 1] [2024-11-14 02:53:34,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 02:53:34,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 02:53:34,214 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-14 02:53:34,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:53:34,215 INFO L85 PathProgramCache]: Analyzing trace with hash -807042061, now seen corresponding path program 2 times [2024-11-14 02:53:34,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:53:34,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721296703] [2024-11-14 02:53:34,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:53:34,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:53:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:53:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16388 backedges. 0 proven. 16384 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 02:53:47,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:53:47,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721296703] [2024-11-14 02:53:47,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721296703] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:53:47,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120382717] [2024-11-14 02:53:47,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:53:47,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:53:47,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:53:47,530 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:53:47,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 02:53:47,776 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-14 02:53:47,776 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:53:47,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 02:53:47,784 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:53:47,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-14 02:53:47,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-14 02:53:47,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 02:53:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16388 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16385 trivial. 0 not checked. [2024-11-14 02:53:50,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:53:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16388 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16385 trivial. 0 not checked. [2024-11-14 02:53:56,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120382717] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:53:56,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1719276435] [2024-11-14 02:53:56,610 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 02:53:56,610 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:53:56,610 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:53:56,610 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:53:56,610 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:53:56,814 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:53:58,017 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11867#(and (exists ((|v_ULTIMATE.start_main_~#dst~0#1.base_26| Int) (|v_ULTIMATE.start_main_~i~0#1_533| Int) (|v_ULTIMATE.start_main_~#dst~0#1.offset_22| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |v_ULTIMATE.start_main_~i~0#1_533| 4))) (<= (+ (* |v_ULTIMATE.start_main_~i~0#1_533| 4) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (= |v_ULTIMATE.start_main_~#dst~0#1.offset_22| 0) (<= 0 |v_ULTIMATE.start_main_~i~0#1_533|) (<= (select |#length| |v_ULTIMATE.start_main_~#dst~0#1.base_26|) (+ 3 (* |v_ULTIMATE.start_main_~i~0#1_533| 4))) (<= 2 |v_ULTIMATE.start_main_~#dst~0#1.base_26|))) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1))' at error location [2024-11-14 02:53:58,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:53:58,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:53:58,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 2, 2] total 134 [2024-11-14 02:53:58,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184832180] [2024-11-14 02:53:58,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:53:58,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2024-11-14 02:53:58,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:53:58,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2024-11-14 02:53:58,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8535, Invalid=10647, Unknown=0, NotChecked=0, Total=19182 [2024-11-14 02:53:58,024 INFO L87 Difference]: Start difference. First operand 288 states and 294 transitions. Second operand has 135 states, 135 states have (on average 2.1259259259259258) internal successors, (287), 134 states have internal predecessors, (287), 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 02:54:00,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 02:54:20,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 02:54:22,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 02:55:32,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:55:32,591 INFO L93 Difference]: Finished difference Result 2204 states and 2461 transitions. [2024-11-14 02:55:32,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 520 states. [2024-11-14 02:55:32,592 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.1259259259259258) internal successors, (287), 134 states have internal predecessors, (287), 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 266 [2024-11-14 02:55:32,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:55:32,600 INFO L225 Difference]: With dead ends: 2204 [2024-11-14 02:55:32,600 INFO L226 Difference]: Without dead ends: 2204 [2024-11-14 02:55:32,614 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1314 GetRequests, 785 SyntacticMatches, 4 SemanticMatches, 525 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77283 ImplicationChecksByTransitivity, 77.8s TimeCoverageRelationStatistics Valid=77300, Invalid=199902, Unknown=0, NotChecked=0, Total=277202 [2024-11-14 02:55:32,615 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 13452 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 796 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13452 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 2251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 796 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:55:32,616 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13452 Valid, 910 Invalid, 2251 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [796 Valid, 1452 Invalid, 3 Unknown, 0 Unchecked, 9.0s Time] [2024-11-14 02:55:32,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2024-11-14 02:55:32,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 289. [2024-11-14 02:55:32,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 285 states have (on average 1.0280701754385966) internal successors, (293), 288 states have internal predecessors, (293), 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 02:55:32,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 293 transitions. [2024-11-14 02:55:32,637 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 293 transitions. Word has length 266 [2024-11-14 02:55:32,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:55:32,637 INFO L471 AbstractCegarLoop]: Abstraction has 289 states and 293 transitions. [2024-11-14 02:55:32,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 2.1259259259259258) internal successors, (287), 134 states have internal predecessors, (287), 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 02:55:32,638 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 293 transitions. [2024-11-14 02:55:32,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2024-11-14 02:55:32,642 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:55:32,642 INFO L215 NwaCegarLoop]: trace histogram [129, 129, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:55:32,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 02:55:32,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:55:32,843 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-14 02:55:32,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:55:32,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1896627207, now seen corresponding path program 1 times [2024-11-14 02:55:32,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:55:32,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22243645] [2024-11-14 02:55:32,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:32,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:55:32,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:33,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16643 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16641 trivial. 0 not checked. [2024-11-14 02:55:33,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:55:33,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22243645] [2024-11-14 02:55:33,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22243645] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:55:33,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387071447] [2024-11-14 02:55:33,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:33,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:55:33,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:55:33,665 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:55:33,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 02:55:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:34,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 1757 conjuncts, 131 conjuncts are in the unsatisfiable core [2024-11-14 02:55:34,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16643 backedges. 0 proven. 16641 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:55:43,164 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:56:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16643 backedges. 0 proven. 16641 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:56:08,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387071447] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:56:08,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [913243126] [2024-11-14 02:56:08,575 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 02:56:08,575 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:56:08,576 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:56:08,576 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:56:08,576 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:56:08,880 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:56:10,346 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17014#(and (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (exists ((|v_ULTIMATE.start_main_~#dst~0#1.base_27| Int)) (and (<= 2 |v_ULTIMATE.start_main_~#dst~0#1.base_27|) (<= (select |#length| |v_ULTIMATE.start_main_~#dst~0#1.base_27|) 3))) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|))' at error location [2024-11-14 02:56:10,346 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:56:10,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:56:10,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 131, 131] total 265 [2024-11-14 02:56:10,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100949963] [2024-11-14 02:56:10,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:56:10,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 266 states [2024-11-14 02:56:10,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:56:10,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 266 interpolants. [2024-11-14 02:56:10,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34486, Invalid=39226, Unknown=0, NotChecked=0, Total=73712 [2024-11-14 02:56:10,361 INFO L87 Difference]: Start difference. First operand 289 states and 293 transitions. Second operand has 266 states, 266 states have (on average 2.0338345864661656) internal successors, (541), 265 states have internal predecessors, (541), 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 03:06:53,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:06:53,752 INFO L93 Difference]: Finished difference Result 6507 states and 7284 transitions. [2024-11-14 03:06:53,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 782 states. [2024-11-14 03:06:53,753 INFO L78 Accepts]: Start accepts. Automaton has has 266 states, 266 states have (on average 2.0338345864661656) internal successors, (541), 265 states have internal predecessors, (541), 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 269 [2024-11-14 03:06:53,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:06:53,773 INFO L225 Difference]: With dead ends: 6507 [2024-11-14 03:06:53,773 INFO L226 Difference]: Without dead ends: 6507 [2024-11-14 03:06:53,812 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1328 GetRequests, 535 SyntacticMatches, 4 SemanticMatches, 789 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157444 ImplicationChecksByTransitivity, 109.4s TimeCoverageRelationStatistics Valid=205173, Invalid=419717, Unknown=0, NotChecked=0, Total=624890 [2024-11-14 03:06:53,813 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 33080 mSDsluCounter, 1571 mSDsCounter, 0 mSdLazyCounter, 3171 mSolverCounterSat, 1068 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33080 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 4239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1068 IncrementalHoareTripleChecker+Valid, 3171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:06:53,813 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33080 Valid, 1577 Invalid, 4239 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1068 Valid, 3171 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2024-11-14 03:06:53,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6507 states. [2024-11-14 03:06:53,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6507 to 553. [2024-11-14 03:06:53,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 549 states have (on average 1.0145719489981786) internal successors, (557), 552 states have internal predecessors, (557), 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 03:06:53,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 557 transitions. [2024-11-14 03:06:53,863 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 557 transitions. Word has length 269 [2024-11-14 03:06:53,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:06:53,864 INFO L471 AbstractCegarLoop]: Abstraction has 553 states and 557 transitions. [2024-11-14 03:06:53,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 266 states, 266 states have (on average 2.0338345864661656) internal successors, (541), 265 states have internal predecessors, (541), 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 03:06:53,865 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 557 transitions. [2024-11-14 03:06:53,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2024-11-14 03:06:53,876 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:06:53,876 INFO L215 NwaCegarLoop]: trace histogram [260, 260, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:06:53,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 03:06:54,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 03:06:54,081 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-14 03:06:54,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:06:54,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1410259271, now seen corresponding path program 1 times [2024-11-14 03:06:54,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:06:54,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136657321] [2024-11-14 03:06:54,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:06:54,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:06:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:06:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 67602 backedges. 0 proven. 519 refuted. 0 times theorem prover too weak. 67083 trivial. 0 not checked. [2024-11-14 03:06:55,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:06:55,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136657321] [2024-11-14 03:06:55,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136657321] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:06:55,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072172643] [2024-11-14 03:06:55,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:06:55,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:06:55,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:06:55,342 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:06:55,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a8c131-1246-4a92-9631-a8c17579ade2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 03:06:56,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:06:56,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 3466 conjuncts, 262 conjuncts are in the unsatisfiable core [2024-11-14 03:06:56,383 INFO L278 TraceCheckSpWp]: Computing forward predicates...