./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.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_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/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_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/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_12309dc8-81c7-47a4-b1b1-363b4e527b59/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 a775ba6b744ab5ffb556747687a592ac2a696b9fe34bb3e21dc1471ba5c99e1a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 05:47:32,938 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 05:47:33,010 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-14 05:47:33,016 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 05:47:33,017 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 05:47:33,055 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 05:47:33,056 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 05:47:33,057 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 05:47:33,057 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 05:47:33,057 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 05:47:33,057 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 05:47:33,058 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 05:47:33,058 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 05:47:33,059 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 05:47:33,059 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 05:47:33,059 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 05:47:33,059 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 05:47:33,059 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 05:47:33,060 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 05:47:33,061 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 05:47:33,061 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 05:47:33,061 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 05:47:33,062 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 05:47:33,062 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 05:47:33,062 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 05:47:33,062 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 05:47:33,062 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 05:47:33,062 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 05:47:33,062 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 05:47:33,063 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 05:47:33,063 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 05:47:33,063 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 05:47:33,063 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 05:47:33,063 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 05:47:33,063 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 05:47:33,063 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 05:47:33,063 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 05:47:33,063 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 05:47:33,063 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 05:47:33,063 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 05:47:33,063 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 05:47:33,064 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:47:33,064 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 05:47:33,064 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 05:47:33,064 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 05:47:33,064 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 05:47:33,064 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 05:47:33,064 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 05:47:33,064 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 05:47:33,064 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_12309dc8-81c7-47a4-b1b1-363b4e527b59/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 -> a775ba6b744ab5ffb556747687a592ac2a696b9fe34bb3e21dc1471ba5c99e1a [2024-11-14 05:47:33,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 05:47:33,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 05:47:33,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 05:47:33,447 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 05:47:33,447 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 05:47:33,450 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i Unable to find full path for "g++" [2024-11-14 05:47:35,594 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 05:47:35,920 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 05:47:35,921 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i [2024-11-14 05:47:35,941 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/data/55d30a5c1/6158a5a83a7044dd8ffa17ced5e1b20b/FLAGb33a1d631 [2024-11-14 05:47:35,957 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/data/55d30a5c1/6158a5a83a7044dd8ffa17ced5e1b20b [2024-11-14 05:47:35,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 05:47:35,963 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 05:47:35,964 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 05:47:35,964 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 05:47:35,968 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 05:47:35,969 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:47:35" (1/1) ... [2024-11-14 05:47:35,969 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a395096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:35, skipping insertion in model container [2024-11-14 05:47:35,970 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:47:35" (1/1) ... [2024-11-14 05:47:35,996 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 05:47:36,306 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-14 05:47:36,307 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-14 05:47:36,311 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:47:36,322 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 05:47:36,373 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:47:36,396 INFO L204 MainTranslator]: Completed translation [2024-11-14 05:47:36,396 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:36 WrapperNode [2024-11-14 05:47:36,397 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 05:47:36,398 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 05:47:36,398 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 05:47:36,398 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 05:47:36,404 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:36" (1/1) ... [2024-11-14 05:47:36,413 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:36" (1/1) ... [2024-11-14 05:47:36,436 INFO L138 Inliner]: procedures = 117, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 101 [2024-11-14 05:47:36,437 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 05:47:36,437 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 05:47:36,437 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 05:47:36,437 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 05:47:36,444 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:36" (1/1) ... [2024-11-14 05:47:36,444 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:36" (1/1) ... [2024-11-14 05:47:36,447 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:36" (1/1) ... [2024-11-14 05:47:36,447 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:36" (1/1) ... [2024-11-14 05:47:36,453 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:36" (1/1) ... [2024-11-14 05:47:36,457 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:36" (1/1) ... [2024-11-14 05:47:36,458 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:36" (1/1) ... [2024-11-14 05:47:36,459 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:36" (1/1) ... [2024-11-14 05:47:36,461 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 05:47:36,461 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 05:47:36,461 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 05:47:36,461 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 05:47:36,462 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:36" (1/1) ... [2024-11-14 05:47:36,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:47:36,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:47:36,493 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 05:47:36,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 05:47:36,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 05:47:36,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 05:47:36,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 05:47:36,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 05:47:36,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 05:47:36,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 05:47:36,613 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 05:47:36,614 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 05:47:36,990 INFO L? ?]: Removed 67 outVars from TransFormulas that were not future-live. [2024-11-14 05:47:36,990 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 05:47:37,060 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 05:47:37,060 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-14 05:47:37,061 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:47:37 BoogieIcfgContainer [2024-11-14 05:47:37,061 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 05:47:37,063 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 05:47:37,064 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 05:47:37,069 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 05:47:37,069 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 05:47:35" (1/3) ... [2024-11-14 05:47:37,070 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af1e712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:47:37, skipping insertion in model container [2024-11-14 05:47:37,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:36" (2/3) ... [2024-11-14 05:47:37,070 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af1e712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:47:37, skipping insertion in model container [2024-11-14 05:47:37,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:47:37" (3/3) ... [2024-11-14 05:47:37,072 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlcpy-alloca-1.i [2024-11-14 05:47:37,088 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 05:47:37,089 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG openbsd_cstrlcpy-alloca-1.i that has 1 procedures, 39 locations, 1 initial locations, 4 loop locations, and 17 error locations. [2024-11-14 05:47:37,133 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 05:47:37,145 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;@22ee6bf5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 05:47:37,146 INFO L334 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2024-11-14 05:47:37,149 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 38 states have internal predecessors, (48), 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 05:47:37,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 05:47:37,155 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:37,156 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 05:47:37,156 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:37,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:37,161 INFO L85 PathProgramCache]: Analyzing trace with hash 157381, now seen corresponding path program 1 times [2024-11-14 05:47:37,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:37,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453649749] [2024-11-14 05:47:37,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:37,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:37,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:37,518 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 05:47:37,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:37,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453649749] [2024-11-14 05:47:37,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453649749] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:47:37,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:47:37,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 05:47:37,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729333935] [2024-11-14 05:47:37,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:47:37,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:47:37,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:37,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:47:37,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:47:37,567 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 38 states have internal predecessors, (48), 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 05:47:37,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:37,672 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2024-11-14 05:47:37,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:47:37,677 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 05:47:37,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:37,685 INFO L225 Difference]: With dead ends: 37 [2024-11-14 05:47:37,686 INFO L226 Difference]: Without dead ends: 36 [2024-11-14 05:47:37,688 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 05:47:37,693 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:37,694 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 49 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:47:37,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-14 05:47:37,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-14 05:47:37,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 35 states have internal predecessors, (43), 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 05:47:37,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2024-11-14 05:47:37,745 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 3 [2024-11-14 05:47:37,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:37,746 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2024-11-14 05:47:37,746 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 05:47:37,746 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2024-11-14 05:47:37,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 05:47:37,746 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:37,746 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 05:47:37,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 05:47:37,748 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:37,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:37,749 INFO L85 PathProgramCache]: Analyzing trace with hash 157382, now seen corresponding path program 1 times [2024-11-14 05:47:37,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:37,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618504450] [2024-11-14 05:47:37,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:37,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:38,233 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 05:47:38,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:38,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618504450] [2024-11-14 05:47:38,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618504450] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:47:38,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:47:38,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 05:47:38,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554452256] [2024-11-14 05:47:38,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:47:38,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:47:38,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:38,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:47:38,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:47:38,236 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 05:47:38,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:38,409 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2024-11-14 05:47:38,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:47:38,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 05:47:38,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:38,410 INFO L225 Difference]: With dead ends: 35 [2024-11-14 05:47:38,410 INFO L226 Difference]: Without dead ends: 35 [2024-11-14 05:47:38,410 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:47:38,411 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:38,411 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 78 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:47:38,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-14 05:47:38,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-14 05:47:38,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 2.0) internal successors, (42), 34 states have internal predecessors, (42), 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 05:47:38,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2024-11-14 05:47:38,416 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 3 [2024-11-14 05:47:38,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:38,416 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2024-11-14 05:47:38,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 05:47:38,417 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2024-11-14 05:47:38,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 05:47:38,417 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:38,417 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 05:47:38,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 05:47:38,418 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:38,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:38,419 INFO L85 PathProgramCache]: Analyzing trace with hash 4984105, now seen corresponding path program 1 times [2024-11-14 05:47:38,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:38,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563680079] [2024-11-14 05:47:38,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:38,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:38,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:38,575 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 05:47:38,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:38,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563680079] [2024-11-14 05:47:38,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563680079] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:47:38,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:47:38,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 05:47:38,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282050933] [2024-11-14 05:47:38,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:47:38,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:47:38,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:38,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:47:38,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:47:38,578 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 05:47:38,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:38,636 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2024-11-14 05:47:38,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:47:38,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2024-11-14 05:47:38,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:38,639 INFO L225 Difference]: With dead ends: 33 [2024-11-14 05:47:38,639 INFO L226 Difference]: Without dead ends: 33 [2024-11-14 05:47:38,639 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 05:47:38,640 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:38,640 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 48 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:47:38,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-14 05:47:38,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-14 05:47:38,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 32 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 05:47:38,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-11-14 05:47:38,647 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 4 [2024-11-14 05:47:38,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:38,648 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-11-14 05:47:38,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 05:47:38,648 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-11-14 05:47:38,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 05:47:38,648 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:38,648 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 05:47:38,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 05:47:38,649 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:38,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:38,651 INFO L85 PathProgramCache]: Analyzing trace with hash 4984106, now seen corresponding path program 1 times [2024-11-14 05:47:38,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:38,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510949216] [2024-11-14 05:47:38,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:38,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:38,871 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 05:47:38,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:38,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510949216] [2024-11-14 05:47:38,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510949216] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:47:38,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:47:38,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 05:47:38,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850288430] [2024-11-14 05:47:38,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:47:38,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:47:38,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:38,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:47:38,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:47:38,872 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 05:47:38,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:38,931 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2024-11-14 05:47:38,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:47:38,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2024-11-14 05:47:38,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:38,933 INFO L225 Difference]: With dead ends: 32 [2024-11-14 05:47:38,933 INFO L226 Difference]: Without dead ends: 32 [2024-11-14 05:47:38,933 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 05:47:38,934 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:38,934 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 47 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:47:38,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-14 05:47:38,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-14 05:47:38,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:47:38,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2024-11-14 05:47:38,938 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 4 [2024-11-14 05:47:38,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:38,939 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2024-11-14 05:47:38,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 05:47:38,939 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2024-11-14 05:47:38,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 05:47:38,939 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:38,939 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 05:47:38,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 05:47:38,940 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:38,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:38,940 INFO L85 PathProgramCache]: Analyzing trace with hash 4981153, now seen corresponding path program 1 times [2024-11-14 05:47:38,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:38,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730959009] [2024-11-14 05:47:38,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:38,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:39,290 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 05:47:39,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:39,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730959009] [2024-11-14 05:47:39,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730959009] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:47:39,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:47:39,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:47:39,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72668921] [2024-11-14 05:47:39,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:47:39,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:47:39,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:39,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:47:39,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:47:39,291 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 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 05:47:39,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:39,407 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2024-11-14 05:47:39,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:47:39,408 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 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 4 [2024-11-14 05:47:39,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:39,409 INFO L225 Difference]: With dead ends: 34 [2024-11-14 05:47:39,409 INFO L226 Difference]: Without dead ends: 34 [2024-11-14 05:47:39,409 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:47:39,410 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:39,410 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 68 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:47:39,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-14 05:47:39,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-14 05:47:39,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.826086956521739) internal successors, (42), 33 states have internal predecessors, (42), 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 05:47:39,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2024-11-14 05:47:39,418 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 4 [2024-11-14 05:47:39,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:39,419 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2024-11-14 05:47:39,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 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 05:47:39,419 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2024-11-14 05:47:39,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 05:47:39,420 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:39,420 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 05:47:39,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 05:47:39,421 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:39,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:39,421 INFO L85 PathProgramCache]: Analyzing trace with hash 154507277, now seen corresponding path program 1 times [2024-11-14 05:47:39,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:39,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337942759] [2024-11-14 05:47:39,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:39,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:39,742 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 05:47:39,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:39,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337942759] [2024-11-14 05:47:39,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337942759] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:47:39,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:47:39,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 05:47:39,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519427116] [2024-11-14 05:47:39,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:47:39,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:47:39,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:39,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:47:39,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:47:39,746 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 05:47:39,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:39,813 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2024-11-14 05:47:39,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:47:39,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 05:47:39,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:39,814 INFO L225 Difference]: With dead ends: 33 [2024-11-14 05:47:39,814 INFO L226 Difference]: Without dead ends: 33 [2024-11-14 05:47:39,814 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 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 05:47:39,817 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 5 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:39,817 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 66 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:47:39,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-14 05:47:39,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-14 05:47:39,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 32 states have internal predecessors, (41), 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 05:47:39,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2024-11-14 05:47:39,824 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 5 [2024-11-14 05:47:39,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:39,824 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2024-11-14 05:47:39,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 05:47:39,824 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2024-11-14 05:47:39,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 05:47:39,825 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:39,825 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2024-11-14 05:47:39,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 05:47:39,825 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:39,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:39,825 INFO L85 PathProgramCache]: Analyzing trace with hash 491999829, now seen corresponding path program 1 times [2024-11-14 05:47:39,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:39,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708412195] [2024-11-14 05:47:39,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:39,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:39,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:40,202 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 05:47:40,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:40,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708412195] [2024-11-14 05:47:40,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708412195] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:47:40,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816726489] [2024-11-14 05:47:40,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:40,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:47:40,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:47:40,208 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:47:40,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 05:47:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:40,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 05:47:40,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:47:40,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:47:40,387 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 7 [2024-11-14 05:47:40,400 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 05:47:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:47:40,607 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:47:40,878 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 05:47:40,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816726489] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:47:40,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1336771594] [2024-11-14 05:47:40,900 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2024-11-14 05:47:40,900 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:47:40,904 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:47:40,909 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:47:40,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:47:41,857 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:47:42,376 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '519#(and (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~i~1#1_35| Int) (|v_ULTIMATE.start_main_~nondetString1~0#1.base_29| Int)) (and (<= 2 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length~0#1| 1) (<= (select |#length| |v_ULTIMATE.start_main_~nondetString1~0#1.base_29|) |v_ULTIMATE.start_main_~i~1#1_35|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_main_~n~1#1|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_main_#t~nondet14#1| 127) (<= 2 |v_ULTIMATE.start_main_~nondetString1~0#1.base_29|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (<= 0 |v_ULTIMATE.start_main_~i~1#1_35|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet14#1|)))))' at error location [2024-11-14 05:47:42,377 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:47:42,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:47:42,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-14 05:47:42,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673251137] [2024-11-14 05:47:42,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:47:42,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 05:47:42,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:42,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 05:47:42,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-11-14 05:47:42,381 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 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 05:47:42,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:42,598 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2024-11-14 05:47:42,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 05:47:42,599 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-14 05:47:42,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:42,600 INFO L225 Difference]: With dead ends: 33 [2024-11-14 05:47:42,600 INFO L226 Difference]: Without dead ends: 33 [2024-11-14 05:47:42,600 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2024-11-14 05:47:42,601 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:42,601 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 126 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:47:42,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-14 05:47:42,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2024-11-14 05:47:42,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 29 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 05:47:42,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2024-11-14 05:47:42,608 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 6 [2024-11-14 05:47:42,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:42,608 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2024-11-14 05:47:42,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 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 05:47:42,608 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2024-11-14 05:47:42,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 05:47:42,608 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:42,608 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:42,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 05:47:42,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 05:47:42,814 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:42,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:42,815 INFO L85 PathProgramCache]: Analyzing trace with hash -919108426, now seen corresponding path program 1 times [2024-11-14 05:47:42,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:42,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521141974] [2024-11-14 05:47:42,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:42,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:42,875 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 05:47:42,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:42,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521141974] [2024-11-14 05:47:42,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521141974] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:47:42,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:47:42,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:47:42,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263857838] [2024-11-14 05:47:42,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:47:42,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:47:42,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:42,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:47:42,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:47:42,877 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 4 states, 3 states have (on average 3.0) 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 05:47:42,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:42,929 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2024-11-14 05:47:42,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:47:42,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) 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 9 [2024-11-14 05:47:42,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:42,930 INFO L225 Difference]: With dead ends: 35 [2024-11-14 05:47:42,930 INFO L226 Difference]: Without dead ends: 35 [2024-11-14 05:47:42,931 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:47:42,931 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 25 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:42,931 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 41 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:47:42,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-14 05:47:42,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2024-11-14 05:47:42,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 28 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 05:47:42,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-11-14 05:47:42,934 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 9 [2024-11-14 05:47:42,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:42,935 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-11-14 05:47:42,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) 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 05:47:42,935 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-11-14 05:47:42,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 05:47:42,935 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:42,935 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:42,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 05:47:42,936 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:42,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:42,936 INFO L85 PathProgramCache]: Analyzing trace with hash -919108425, now seen corresponding path program 1 times [2024-11-14 05:47:42,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:42,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402044637] [2024-11-14 05:47:42,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:42,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:43,033 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 05:47:43,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:43,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402044637] [2024-11-14 05:47:43,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402044637] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:47:43,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:47:43,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:47:43,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206681860] [2024-11-14 05:47:43,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:47:43,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:47:43,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:43,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:47:43,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:47:43,035 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 5 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 05:47:43,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:43,083 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2024-11-14 05:47:43,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:47:43,084 INFO L78 Accepts]: Start accepts. Automaton has has 5 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 9 [2024-11-14 05:47:43,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:43,085 INFO L225 Difference]: With dead ends: 40 [2024-11-14 05:47:43,085 INFO L226 Difference]: Without dead ends: 40 [2024-11-14 05:47:43,085 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:47:43,086 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 21 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:43,086 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 63 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:47:43,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-14 05:47:43,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2024-11-14 05:47:43,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 33 states have internal predecessors, (44), 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 05:47:43,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2024-11-14 05:47:43,090 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 9 [2024-11-14 05:47:43,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:43,090 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2024-11-14 05:47:43,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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 05:47:43,090 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2024-11-14 05:47:43,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 05:47:43,091 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:43,091 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:43,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 05:47:43,091 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:43,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:43,092 INFO L85 PathProgramCache]: Analyzing trace with hash -919083352, now seen corresponding path program 1 times [2024-11-14 05:47:43,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:43,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098048183] [2024-11-14 05:47:43,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:43,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:43,122 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 05:47:43,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:43,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098048183] [2024-11-14 05:47:43,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098048183] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:47:43,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:47:43,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:47:43,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181376858] [2024-11-14 05:47:43,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:47:43,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:47:43,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:43,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:47:43,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:47:43,124 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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 05:47:43,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:43,152 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2024-11-14 05:47:43,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:47:43,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2024-11-14 05:47:43,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:43,153 INFO L225 Difference]: With dead ends: 35 [2024-11-14 05:47:43,153 INFO L226 Difference]: Without dead ends: 35 [2024-11-14 05:47:43,154 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 05:47:43,154 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:43,154 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:47:43,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-14 05:47:43,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-14 05:47:43,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 34 states have internal predecessors, (45), 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 05:47:43,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2024-11-14 05:47:43,157 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 9 [2024-11-14 05:47:43,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:43,158 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2024-11-14 05:47:43,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 05:47:43,158 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2024-11-14 05:47:43,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 05:47:43,158 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:43,158 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:43,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-14 05:47:43,159 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:43,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:43,159 INFO L85 PathProgramCache]: Analyzing trace with hash -919877962, now seen corresponding path program 1 times [2024-11-14 05:47:43,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:43,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802518386] [2024-11-14 05:47:43,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:43,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:43,217 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 05:47:43,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:43,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802518386] [2024-11-14 05:47:43,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802518386] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:47:43,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:47:43,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:47:43,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928282553] [2024-11-14 05:47:43,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:47:43,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:47:43,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:43,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:47:43,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:47:43,218 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 3 states have (on average 3.0) 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 05:47:43,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:43,275 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2024-11-14 05:47:43,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:47:43,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) 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 9 [2024-11-14 05:47:43,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:43,277 INFO L225 Difference]: With dead ends: 34 [2024-11-14 05:47:43,277 INFO L226 Difference]: Without dead ends: 34 [2024-11-14 05:47:43,277 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:47:43,278 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:43,278 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 36 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:47:43,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-14 05:47:43,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-14 05:47:43,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 33 states have internal predecessors, (44), 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 05:47:43,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2024-11-14 05:47:43,280 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 9 [2024-11-14 05:47:43,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:43,281 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2024-11-14 05:47:43,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) 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 05:47:43,283 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2024-11-14 05:47:43,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 05:47:43,283 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:43,283 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:43,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-14 05:47:43,283 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:43,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:43,284 INFO L85 PathProgramCache]: Analyzing trace with hash -919877961, now seen corresponding path program 1 times [2024-11-14 05:47:43,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:43,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977150049] [2024-11-14 05:47:43,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:43,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:43,489 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 05:47:43,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:43,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977150049] [2024-11-14 05:47:43,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977150049] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:47:43,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:47:43,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:47:43,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207989874] [2024-11-14 05:47:43,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:47:43,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:47:43,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:43,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:47:43,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:47:43,491 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 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 05:47:43,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:43,571 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2024-11-14 05:47:43,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:47:43,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 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 9 [2024-11-14 05:47:43,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:43,572 INFO L225 Difference]: With dead ends: 37 [2024-11-14 05:47:43,572 INFO L226 Difference]: Without dead ends: 37 [2024-11-14 05:47:43,572 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:47:43,573 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 11 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:43,574 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 65 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:47:43,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-14 05:47:43,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2024-11-14 05:47:43,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 34 states have internal predecessors, (45), 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 05:47:43,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2024-11-14 05:47:43,580 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 9 [2024-11-14 05:47:43,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:43,580 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2024-11-14 05:47:43,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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 05:47:43,580 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2024-11-14 05:47:43,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 05:47:43,581 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:43,581 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:43,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-14 05:47:43,581 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:43,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:43,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1572414988, now seen corresponding path program 1 times [2024-11-14 05:47:43,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:43,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056497864] [2024-11-14 05:47:43,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:43,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:43,640 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 05:47:43,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:43,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056497864] [2024-11-14 05:47:43,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056497864] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:47:43,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:47:43,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:47:43,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629442946] [2024-11-14 05:47:43,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:47:43,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:47:43,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:43,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:47:43,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:47:43,643 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) 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 05:47:43,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:43,698 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2024-11-14 05:47:43,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:47:43,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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 10 [2024-11-14 05:47:43,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:43,699 INFO L225 Difference]: With dead ends: 34 [2024-11-14 05:47:43,699 INFO L226 Difference]: Without dead ends: 34 [2024-11-14 05:47:43,699 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:47:43,700 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:43,700 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 36 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:47:43,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-14 05:47:43,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-14 05:47:43,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 33 states have internal predecessors, (44), 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 05:47:43,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2024-11-14 05:47:43,706 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 10 [2024-11-14 05:47:43,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:43,706 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2024-11-14 05:47:43,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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 05:47:43,707 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2024-11-14 05:47:43,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 05:47:43,707 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:43,707 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:43,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-14 05:47:43,707 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:43,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:43,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1572414989, now seen corresponding path program 1 times [2024-11-14 05:47:43,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:43,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907961154] [2024-11-14 05:47:43,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:43,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:43,912 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 05:47:43,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:43,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907961154] [2024-11-14 05:47:43,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907961154] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:47:43,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:47:43,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:47:43,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066613929] [2024-11-14 05:47:43,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:47:43,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:47:43,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:43,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:47:43,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:47:43,915 INFO L87 Difference]: Start difference. First operand 34 states and 44 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 05:47:43,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:43,996 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2024-11-14 05:47:43,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:47:43,997 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 10 [2024-11-14 05:47:43,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:43,997 INFO L225 Difference]: With dead ends: 37 [2024-11-14 05:47:43,997 INFO L226 Difference]: Without dead ends: 37 [2024-11-14 05:47:43,999 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:47:44,000 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 10 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:44,000 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 61 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:47:44,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-14 05:47:44,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2024-11-14 05:47:44,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 35 states have internal predecessors, (46), 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 05:47:44,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2024-11-14 05:47:44,004 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 10 [2024-11-14 05:47:44,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:44,004 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2024-11-14 05:47:44,004 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 05:47:44,004 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2024-11-14 05:47:44,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 05:47:44,006 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:44,006 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:44,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-14 05:47:44,007 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:44,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:44,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1548554290, now seen corresponding path program 1 times [2024-11-14 05:47:44,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:44,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189639155] [2024-11-14 05:47:44,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:44,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:44,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:44,074 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 05:47:44,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:44,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189639155] [2024-11-14 05:47:44,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189639155] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:47:44,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:47:44,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 05:47:44,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591934315] [2024-11-14 05:47:44,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:47:44,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:47:44,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:44,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:47:44,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:47:44,078 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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 05:47:44,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:44,145 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2024-11-14 05:47:44,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:47:44,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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 10 [2024-11-14 05:47:44,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:44,146 INFO L225 Difference]: With dead ends: 42 [2024-11-14 05:47:44,146 INFO L226 Difference]: Without dead ends: 42 [2024-11-14 05:47:44,147 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:47:44,148 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:44,149 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 53 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:47:44,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-14 05:47:44,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2024-11-14 05:47:44,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.5) internal successors, (45), 34 states have internal predecessors, (45), 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 05:47:44,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2024-11-14 05:47:44,155 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 10 [2024-11-14 05:47:44,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:44,155 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2024-11-14 05:47:44,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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 05:47:44,155 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2024-11-14 05:47:44,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 05:47:44,156 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:44,156 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:44,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-14 05:47:44,156 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:44,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:44,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1548554291, now seen corresponding path program 1 times [2024-11-14 05:47:44,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:44,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054816525] [2024-11-14 05:47:44,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:44,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:44,291 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 05:47:44,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:44,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054816525] [2024-11-14 05:47:44,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054816525] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:47:44,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:47:44,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 05:47:44,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159424221] [2024-11-14 05:47:44,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:47:44,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 05:47:44,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:44,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 05:47:44,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:47:44,294 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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 05:47:44,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:44,363 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2024-11-14 05:47:44,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:47:44,363 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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 10 [2024-11-14 05:47:44,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:44,364 INFO L225 Difference]: With dead ends: 43 [2024-11-14 05:47:44,364 INFO L226 Difference]: Without dead ends: 43 [2024-11-14 05:47:44,364 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:47:44,366 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:44,367 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 64 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:47:44,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-14 05:47:44,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2024-11-14 05:47:44,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 35 states have internal predecessors, (46), 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 05:47:44,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2024-11-14 05:47:44,373 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 10 [2024-11-14 05:47:44,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:44,373 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2024-11-14 05:47:44,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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 05:47:44,373 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2024-11-14 05:47:44,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 05:47:44,375 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:44,375 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:44,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-14 05:47:44,375 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:44,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:44,376 INFO L85 PathProgramCache]: Analyzing trace with hash 760527134, now seen corresponding path program 1 times [2024-11-14 05:47:44,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:44,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236254530] [2024-11-14 05:47:44,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:44,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:44,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:44,508 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 05:47:44,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:44,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236254530] [2024-11-14 05:47:44,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236254530] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:47:44,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:47:44,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 05:47:44,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84627637] [2024-11-14 05:47:44,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:47:44,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:47:44,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:44,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:47:44,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:47:44,510 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:47:44,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:44,542 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2024-11-14 05:47:44,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:47:44,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-14 05:47:44,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:44,543 INFO L225 Difference]: With dead ends: 35 [2024-11-14 05:47:44,543 INFO L226 Difference]: Without dead ends: 33 [2024-11-14 05:47:44,543 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:47:44,544 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 22 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:44,544 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:47:44,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-14 05:47:44,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2024-11-14 05:47:44,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 31 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 05:47:44,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2024-11-14 05:47:44,546 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 11 [2024-11-14 05:47:44,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:44,547 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2024-11-14 05:47:44,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:47:44,547 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2024-11-14 05:47:44,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-14 05:47:44,547 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:44,548 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:44,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-14 05:47:44,548 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:44,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:44,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1393314750, now seen corresponding path program 1 times [2024-11-14 05:47:44,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:44,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405493676] [2024-11-14 05:47:44,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:44,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:47:44,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:44,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405493676] [2024-11-14 05:47:44,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405493676] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:47:44,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:47:44,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 05:47:44,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860719915] [2024-11-14 05:47:44,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:47:44,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 05:47:44,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:44,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 05:47:44,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-14 05:47:44,679 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:47:44,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:44,735 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2024-11-14 05:47:44,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 05:47:44,735 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-14 05:47:44,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:44,735 INFO L225 Difference]: With dead ends: 38 [2024-11-14 05:47:44,735 INFO L226 Difference]: Without dead ends: 38 [2024-11-14 05:47:44,736 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-14 05:47:44,736 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 9 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:44,736 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 111 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:47:44,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-14 05:47:44,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2024-11-14 05:47:44,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.40625) internal successors, (45), 35 states have internal predecessors, (45), 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 05:47:44,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-11-14 05:47:44,739 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 13 [2024-11-14 05:47:44,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:44,739 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-11-14 05:47:44,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:47:44,739 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-11-14 05:47:44,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 05:47:44,740 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:44,740 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:44,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-14 05:47:44,740 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:44,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:44,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1377498495, now seen corresponding path program 1 times [2024-11-14 05:47:44,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:44,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624435807] [2024-11-14 05:47:44,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:44,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:44,902 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 05:47:44,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:44,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624435807] [2024-11-14 05:47:44,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624435807] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:47:44,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:47:44,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-14 05:47:44,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321778203] [2024-11-14 05:47:44,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:47:44,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 05:47:44,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:44,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 05:47:44,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-14 05:47:44,904 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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 05:47:44,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:44,967 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2024-11-14 05:47:44,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 05:47:44,968 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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 14 [2024-11-14 05:47:44,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:44,968 INFO L225 Difference]: With dead ends: 39 [2024-11-14 05:47:44,968 INFO L226 Difference]: Without dead ends: 39 [2024-11-14 05:47:44,969 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-14 05:47:44,969 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:44,969 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 104 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:47:44,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-14 05:47:44,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2024-11-14 05:47:44,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 37 states have internal predecessors, (47), 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 05:47:44,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2024-11-14 05:47:44,971 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 14 [2024-11-14 05:47:44,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:44,971 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2024-11-14 05:47:44,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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 05:47:44,972 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2024-11-14 05:47:44,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 05:47:44,972 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:44,973 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:44,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-14 05:47:44,973 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:44,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:44,973 INFO L85 PathProgramCache]: Analyzing trace with hash 953572280, now seen corresponding path program 1 times [2024-11-14 05:47:44,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:44,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101147972] [2024-11-14 05:47:44,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:44,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:45,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:47:45,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:45,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101147972] [2024-11-14 05:47:45,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101147972] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:47:45,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:47:45,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 05:47:45,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96867850] [2024-11-14 05:47:45,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:47:45,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:47:45,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:45,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:47:45,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:47:45,063 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 05:47:45,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:45,107 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2024-11-14 05:47:45,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:47:45,107 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 15 [2024-11-14 05:47:45,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:45,108 INFO L225 Difference]: With dead ends: 40 [2024-11-14 05:47:45,108 INFO L226 Difference]: Without dead ends: 40 [2024-11-14 05:47:45,108 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:47:45,109 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 9 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:45,109 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 62 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:47:45,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-14 05:47:45,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-14 05:47:45,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 39 states have internal predecessors, (48), 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 05:47:45,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-11-14 05:47:45,111 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 15 [2024-11-14 05:47:45,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:45,111 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-11-14 05:47:45,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 05:47:45,112 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-11-14 05:47:45,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 05:47:45,112 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:45,112 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:45,112 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-14 05:47:45,112 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:45,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:45,113 INFO L85 PathProgramCache]: Analyzing trace with hash -20320754, now seen corresponding path program 1 times [2024-11-14 05:47:45,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:45,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834701716] [2024-11-14 05:47:45,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:45,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:45,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:47:45,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:45,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834701716] [2024-11-14 05:47:45,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834701716] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:47:45,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006089666] [2024-11-14 05:47:45,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:45,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:47:45,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:47:45,291 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:47:45,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 05:47:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:45,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 05:47:45,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:47:45,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-14 05:47:45,632 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:47:45,639 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:47:45,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2024-11-14 05:47:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:47:45,663 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:47:45,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006089666] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:47:45,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:47:45,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2024-11-14 05:47:45,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629439449] [2024-11-14 05:47:45,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:47:45,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 05:47:45,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:45,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 05:47:45,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-11-14 05:47:45,665 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:47:45,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:45,782 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2024-11-14 05:47:45,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 05:47:45,782 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-14 05:47:45,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:45,783 INFO L225 Difference]: With dead ends: 63 [2024-11-14 05:47:45,783 INFO L226 Difference]: Without dead ends: 50 [2024-11-14 05:47:45,783 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-11-14 05:47:45,784 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:45,785 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 99 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:47:45,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-14 05:47:45,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-11-14 05:47:45,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 48 states have internal predecessors, (59), 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 05:47:45,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2024-11-14 05:47:45,787 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 15 [2024-11-14 05:47:45,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:45,787 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2024-11-14 05:47:45,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:47:45,788 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2024-11-14 05:47:45,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 05:47:45,788 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:45,788 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:45,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 05:47:45,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-14 05:47:45,989 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:45,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:45,990 INFO L85 PathProgramCache]: Analyzing trace with hash 990639411, now seen corresponding path program 1 times [2024-11-14 05:47:45,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:45,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019050218] [2024-11-14 05:47:45,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:45,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:47:46,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:46,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019050218] [2024-11-14 05:47:46,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019050218] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:47:46,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776460350] [2024-11-14 05:47:46,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:46,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:47:46,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:47:46,333 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:47:46,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 05:47:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:46,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 05:47:46,439 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:47:46,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:47:46,495 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:47:46,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776460350] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:47:46,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:47:46,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 12 [2024-11-14 05:47:46,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600783153] [2024-11-14 05:47:46,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:47:46,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:47:46,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:46,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:47:46,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-14 05:47:46,496 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:47:46,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:46,533 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2024-11-14 05:47:46,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:47:46,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-14 05:47:46,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:46,534 INFO L225 Difference]: With dead ends: 50 [2024-11-14 05:47:46,534 INFO L226 Difference]: Without dead ends: 49 [2024-11-14 05:47:46,535 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-14 05:47:46,536 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:46,537 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 48 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:47:46,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-14 05:47:46,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-14 05:47:46,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 45 states have (on average 1.288888888888889) internal successors, (58), 48 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 05:47:46,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2024-11-14 05:47:46,539 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 16 [2024-11-14 05:47:46,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:46,539 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2024-11-14 05:47:46,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:47:46,540 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2024-11-14 05:47:46,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 05:47:46,540 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:46,540 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:46,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 05:47:46,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:47:46,745 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:46,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:46,745 INFO L85 PathProgramCache]: Analyzing trace with hash 990674232, now seen corresponding path program 1 times [2024-11-14 05:47:46,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:46,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310011945] [2024-11-14 05:47:46,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:46,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:47:46,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:46,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310011945] [2024-11-14 05:47:46,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310011945] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:47:46,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508278719] [2024-11-14 05:47:46,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:46,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:47:46,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:47:46,968 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:47:46,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 05:47:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:47,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 05:47:47,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:47:47,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-14 05:47:47,302 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:47:47,305 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:47:47,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2024-11-14 05:47:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:47:47,332 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:47:47,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508278719] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:47:47,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:47:47,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 14 [2024-11-14 05:47:47,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882380752] [2024-11-14 05:47:47,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:47:47,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 05:47:47,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:47,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 05:47:47,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-11-14 05:47:47,334 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:47:47,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:47,433 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2024-11-14 05:47:47,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 05:47:47,433 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 16 [2024-11-14 05:47:47,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:47,434 INFO L225 Difference]: With dead ends: 53 [2024-11-14 05:47:47,434 INFO L226 Difference]: Without dead ends: 42 [2024-11-14 05:47:47,434 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-11-14 05:47:47,435 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:47,435 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 98 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:47:47,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-14 05:47:47,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2024-11-14 05:47:47,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 40 states have internal predecessors, (48), 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 05:47:47,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2024-11-14 05:47:47,437 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 16 [2024-11-14 05:47:47,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:47,438 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2024-11-14 05:47:47,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 05:47:47,438 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2024-11-14 05:47:47,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 05:47:47,439 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:47,439 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:47,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 05:47:47,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-14 05:47:47,643 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:47,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:47,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1216049684, now seen corresponding path program 1 times [2024-11-14 05:47:47,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:47,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307097772] [2024-11-14 05:47:47,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:47,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:47,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:47,956 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 05:47:47,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:47,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307097772] [2024-11-14 05:47:47,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307097772] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:47:47,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848501717] [2024-11-14 05:47:47,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:47,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:47:47,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:47:47,959 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:47:47,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 05:47:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:48,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 05:47:48,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:47:48,096 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 05:47:48,217 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 05:47:48,217 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:47:48,493 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 05:47:48,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848501717] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:47:48,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1045937] [2024-11-14 05:47:48,495 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:47:48,495 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:47:48,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:47:48,496 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:47:48,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:47:49,920 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:47:50,844 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2081#true' at error location [2024-11-14 05:47:50,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:47:50,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:47:50,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-14 05:47:50,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894158063] [2024-11-14 05:47:50,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:47:50,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 05:47:50,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:50,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 05:47:50,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2024-11-14 05:47:50,847 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 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 05:47:51,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:51,145 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2024-11-14 05:47:51,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 05:47:51,147 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 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 17 [2024-11-14 05:47:51,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:51,147 INFO L225 Difference]: With dead ends: 51 [2024-11-14 05:47:51,147 INFO L226 Difference]: Without dead ends: 51 [2024-11-14 05:47:51,148 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2024-11-14 05:47:51,152 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 31 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:51,152 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 150 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:47:51,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-14 05:47:51,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2024-11-14 05:47:51,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 49 states have internal predecessors, (59), 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 05:47:51,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2024-11-14 05:47:51,154 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 17 [2024-11-14 05:47:51,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:51,154 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2024-11-14 05:47:51,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 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 05:47:51,155 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2024-11-14 05:47:51,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-14 05:47:51,155 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:51,155 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:51,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 05:47:51,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-14 05:47:51,356 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:51,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:51,357 INFO L85 PathProgramCache]: Analyzing trace with hash 663452146, now seen corresponding path program 1 times [2024-11-14 05:47:51,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:51,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185755900] [2024-11-14 05:47:51,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:51,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:51,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:47:51,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:51,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185755900] [2024-11-14 05:47:51,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185755900] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:47:51,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675591453] [2024-11-14 05:47:51,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:51,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:47:51,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:47:51,719 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:47:51,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 05:47:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:51,825 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 05:47:51,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:47:51,833 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 05:47:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:47:51,939 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:47:52,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:47:52,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675591453] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:47:52,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1567518602] [2024-11-14 05:47:52,195 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:47:52,196 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:47:52,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:47:52,196 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:47:52,196 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:47:53,345 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:47:54,184 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2430#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_23| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_23| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_23|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_23| 1)) (< |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_23| 0)) (or (and (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_23|) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_21| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_21| 4294967296) 0))) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_23| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (and (= (select |#valid| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) 1) (<= 1 (+ |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|)) (not (= (mod |ULTIMATE.start_cstrlcpy_~n~0#1| 4294967296) 0)) (not (= 0 (mod (+ |ULTIMATE.start_cstrlcpy_~n~0#1| 1) 4294967296))) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |ULTIMATE.start_cstrlcpy_~siz#1| (+ |ULTIMATE.start_cstrlcpy_~n~0#1| 1)) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_23|) (exists ((|v_ULTIMATE.start_main_~length~0#1_68| Int) (|v_#memory_int_57| (Array Int (Array Int Int)))) (and (<= (+ |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_68|) (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_23|)) (<= 1 (+ |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_68|)) (= |#memory_int| (store (store |v_#memory_int_57| |ULTIMATE.start_cstrlcpy_#t~post3#1.base| (store (select |v_#memory_int_57| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) 0)) |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_23| (store (select (store |v_#memory_int_57| |ULTIMATE.start_cstrlcpy_#t~post3#1.base| (store (select |v_#memory_int_57| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) 0)) |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_23|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_68|) 0))))) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_23|) 1) (<= (+ |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (select |#length| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|)) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_23|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_23| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|)))))' at error location [2024-11-14 05:47:54,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:47:54,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:47:54,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-14 05:47:54,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196018944] [2024-11-14 05:47:54,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:47:54,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 05:47:54,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:54,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 05:47:54,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2024-11-14 05:47:54,187 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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 05:47:54,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:54,479 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2024-11-14 05:47:54,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 05:47:54,480 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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 05:47:54,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:54,480 INFO L225 Difference]: With dead ends: 52 [2024-11-14 05:47:54,480 INFO L226 Difference]: Without dead ends: 52 [2024-11-14 05:47:54,481 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2024-11-14 05:47:54,481 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:54,482 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 169 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:47:54,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-14 05:47:54,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2024-11-14 05:47:54,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:47:54,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2024-11-14 05:47:54,485 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 18 [2024-11-14 05:47:54,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:54,485 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2024-11-14 05:47:54,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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 05:47:54,486 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2024-11-14 05:47:54,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-14 05:47:54,486 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:54,486 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:54,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 05:47:54,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-14 05:47:54,687 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:54,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:54,688 INFO L85 PathProgramCache]: Analyzing trace with hash -907819944, now seen corresponding path program 1 times [2024-11-14 05:47:54,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:54,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538396885] [2024-11-14 05:47:54,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:54,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:54,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:47:55,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:55,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538396885] [2024-11-14 05:47:55,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538396885] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:47:55,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066561669] [2024-11-14 05:47:55,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:55,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:47:55,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:47:55,031 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:47:55,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 05:47:55,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:55,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 05:47:55,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:47:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:47:55,328 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:47:55,523 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 5 treesize of output 3 [2024-11-14 05:47:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:47:55,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066561669] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:47:55,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [292219379] [2024-11-14 05:47:55,556 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:47:55,556 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:47:55,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:47:55,556 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:47:55,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:47:56,959 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:47:57,558 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2676#(and (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|))' at error location [2024-11-14 05:47:57,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:47:57,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:47:57,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-11-14 05:47:57,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777940658] [2024-11-14 05:47:57,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:47:57,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 05:47:57,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:57,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 05:47:57,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=823, Unknown=1, NotChecked=0, Total=930 [2024-11-14 05:47:57,560 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 21 states, 20 states have (on average 2.25) internal successors, (45), 21 states have internal predecessors, (45), 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 05:47:57,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:57,886 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2024-11-14 05:47:57,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 05:47:57,886 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 21 states have internal predecessors, (45), 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 19 [2024-11-14 05:47:57,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:57,887 INFO L225 Difference]: With dead ends: 65 [2024-11-14 05:47:57,887 INFO L226 Difference]: Without dead ends: 65 [2024-11-14 05:47:57,888 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=130, Invalid=991, Unknown=1, NotChecked=0, Total=1122 [2024-11-14 05:47:57,888 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:57,889 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 257 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:47:57,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-14 05:47:57,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 52. [2024-11-14 05:47:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.25) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:47:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2024-11-14 05:47:57,891 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 19 [2024-11-14 05:47:57,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:57,891 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2024-11-14 05:47:57,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 21 states have internal predecessors, (45), 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 05:47:57,891 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2024-11-14 05:47:57,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 05:47:57,892 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:57,892 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:57,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 05:47:58,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-14 05:47:58,093 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:58,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:58,093 INFO L85 PathProgramCache]: Analyzing trace with hash -712960293, now seen corresponding path program 2 times [2024-11-14 05:47:58,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:58,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035808126] [2024-11-14 05:47:58,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:58,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:58,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 05:47:58,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:58,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035808126] [2024-11-14 05:47:58,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035808126] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:47:58,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563171151] [2024-11-14 05:47:58,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:47:58,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:47:58,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:47:58,266 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:47:58,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 05:47:58,362 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-14 05:47:58,362 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:47:58,363 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 05:47:58,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:47:58,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:47:58,386 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 05:47:58,393 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 05:47:58,455 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 13 treesize of output 9 [2024-11-14 05:47:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 05:47:58,519 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:47:58,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563171151] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:47:58,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:47:58,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2024-11-14 05:47:58,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648431004] [2024-11-14 05:47:58,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:47:58,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:47:58,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:58,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:47:58,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-14 05:47:58,521 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:47:58,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:58,597 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2024-11-14 05:47:58,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:47:58,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-14 05:47:58,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:58,598 INFO L225 Difference]: With dead ends: 52 [2024-11-14 05:47:58,598 INFO L226 Difference]: Without dead ends: 52 [2024-11-14 05:47:58,598 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-14 05:47:58,599 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:58,599 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 51 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:47:58,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-14 05:47:58,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2024-11-14 05:47:58,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 49 states have internal predecessors, (57), 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 05:47:58,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2024-11-14 05:47:58,602 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 20 [2024-11-14 05:47:58,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:58,602 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2024-11-14 05:47:58,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:47:58,603 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2024-11-14 05:47:58,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-14 05:47:58,603 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:58,603 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:58,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-14 05:47:58,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-14 05:47:58,808 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:47:58,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:58,808 INFO L85 PathProgramCache]: Analyzing trace with hash 65106132, now seen corresponding path program 1 times [2024-11-14 05:47:58,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:58,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833173749] [2024-11-14 05:47:58,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:58,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:47:59,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:59,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833173749] [2024-11-14 05:47:59,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833173749] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:47:59,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243323225] [2024-11-14 05:47:59,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:59,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:47:59,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:47:59,365 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:47:59,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 05:47:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:59,473 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-14 05:47:59,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:47:59,485 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 05:47:59,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 9 [2024-11-14 05:47:59,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:47:59,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:47:59,793 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:47:59,812 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_359 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_359) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2024-11-14 05:47:59,841 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:47:59,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 05:47:59,851 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:47:59,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:47:59,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:47:59,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243323225] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:47:59,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1108346786] [2024-11-14 05:47:59,965 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-14 05:47:59,965 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:47:59,966 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:47:59,966 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:47:59,966 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:48:01,099 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:48:02,810 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2980#true' at error location [2024-11-14 05:48:02,810 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:48:02,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:48:02,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2024-11-14 05:48:02,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516645178] [2024-11-14 05:48:02,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:48:02,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-14 05:48:02,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:48:02,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-14 05:48:02,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1015, Unknown=13, NotChecked=64, Total=1190 [2024-11-14 05:48:02,811 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 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 05:48:03,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:48:03,121 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2024-11-14 05:48:03,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 05:48:03,121 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 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 21 [2024-11-14 05:48:03,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:48:03,122 INFO L225 Difference]: With dead ends: 77 [2024-11-14 05:48:03,122 INFO L226 Difference]: Without dead ends: 63 [2024-11-14 05:48:03,123 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=119, Invalid=1204, Unknown=13, NotChecked=70, Total=1406 [2024-11-14 05:48:03,124 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:48:03,124 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 216 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 272 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2024-11-14 05:48:03,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-14 05:48:03,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2024-11-14 05:48:03,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 59 states have internal predecessors, (69), 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 05:48:03,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2024-11-14 05:48:03,129 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 21 [2024-11-14 05:48:03,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:48:03,129 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2024-11-14 05:48:03,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 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 05:48:03,130 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2024-11-14 05:48:03,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 05:48:03,130 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:03,130 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:48:03,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 05:48:03,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-14 05:48:03,331 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:48:03,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:03,331 INFO L85 PathProgramCache]: Analyzing trace with hash -280914135, now seen corresponding path program 2 times [2024-11-14 05:48:03,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:48:03,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528238968] [2024-11-14 05:48:03,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:03,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:48:03,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:48:03,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:48:03,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528238968] [2024-11-14 05:48:03,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528238968] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:48:03,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459063581] [2024-11-14 05:48:03,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:48:03,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:03,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:48:03,518 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:48:03,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 05:48:03,638 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 05:48:03,638 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:48:03,640 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-14 05:48:03,642 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:03,651 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 18 treesize of output 16 [2024-11-14 05:48:03,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 9 [2024-11-14 05:48:03,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 05:48:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:48:03,870 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:03,886 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_394 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_394) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2024-11-14 05:48:03,944 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:48:03,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 05:48:03,953 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:48:03,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:48:04,048 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2024-11-14 05:48:04,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459063581] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:04,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2100863313] [2024-11-14 05:48:04,050 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:48:04,051 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:48:04,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:48:04,051 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:48:04,051 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:48:05,144 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:48:05,892 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3433#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_44| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_44| Int)) (and (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_41| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_41| 4294967296) 0))) (or (< |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_44| 0) (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_44|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_44| 1))) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_44|) (= |ULTIMATE.start_cstrlcpy_~s~0#1.offset| (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_44| 1)) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|)))' at error location [2024-11-14 05:48:05,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:48:05,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:48:05,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2024-11-14 05:48:05,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577477015] [2024-11-14 05:48:05,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:48:05,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-14 05:48:05,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:48:05,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-14 05:48:05,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=902, Unknown=10, NotChecked=60, Total=1056 [2024-11-14 05:48:05,894 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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 05:48:06,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:48:06,451 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2024-11-14 05:48:06,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-14 05:48:06,452 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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) Word has length 23 [2024-11-14 05:48:06,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:48:06,452 INFO L225 Difference]: With dead ends: 100 [2024-11-14 05:48:06,452 INFO L226 Difference]: Without dead ends: 96 [2024-11-14 05:48:06,453 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=136, Invalid=1497, Unknown=11, NotChecked=78, Total=1722 [2024-11-14 05:48:06,454 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:48:06,454 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 256 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 441 Invalid, 0 Unknown, 68 Unchecked, 0.3s Time] [2024-11-14 05:48:06,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-14 05:48:06,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 67. [2024-11-14 05:48:06,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 66 states have internal predecessors, (77), 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 05:48:06,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2024-11-14 05:48:06,456 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 23 [2024-11-14 05:48:06,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:48:06,456 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2024-11-14 05:48:06,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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 05:48:06,456 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2024-11-14 05:48:06,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 05:48:06,457 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:06,457 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:48:06,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 05:48:06,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-14 05:48:06,665 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:48:06,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:06,666 INFO L85 PathProgramCache]: Analyzing trace with hash 2026199130, now seen corresponding path program 2 times [2024-11-14 05:48:06,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:48:06,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890216550] [2024-11-14 05:48:06,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:06,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:48:06,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:48:06,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:48:06,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890216550] [2024-11-14 05:48:06,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890216550] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:48:06,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657495480] [2024-11-14 05:48:06,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:48:06,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:06,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:48:06,986 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:48:06,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 05:48:07,105 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 05:48:07,105 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:48:07,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-14 05:48:07,109 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:07,116 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 05:48:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:48:07,277 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:48:07,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657495480] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:07,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [698572053] [2024-11-14 05:48:07,628 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-14 05:48:07,628 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:48:07,628 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:48:07,629 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:48:07,629 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:48:08,776 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:48:10,886 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3630#true' at error location [2024-11-14 05:48:10,886 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:48:10,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:48:10,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2024-11-14 05:48:10,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144514558] [2024-11-14 05:48:10,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:48:10,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 05:48:10,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:48:10,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 05:48:10,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=940, Unknown=11, NotChecked=0, Total=1056 [2024-11-14 05:48:10,888 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 21 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 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 05:48:11,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:48:11,237 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2024-11-14 05:48:11,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 05:48:11,238 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 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 23 [2024-11-14 05:48:11,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:48:11,239 INFO L225 Difference]: With dead ends: 92 [2024-11-14 05:48:11,239 INFO L226 Difference]: Without dead ends: 92 [2024-11-14 05:48:11,239 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=128, Invalid=1121, Unknown=11, NotChecked=0, Total=1260 [2024-11-14 05:48:11,240 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 38 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:48:11,240 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 222 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:48:11,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-14 05:48:11,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2024-11-14 05:48:11,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 85 states have (on average 1.188235294117647) internal successors, (101), 88 states have internal predecessors, (101), 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 05:48:11,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2024-11-14 05:48:11,246 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 23 [2024-11-14 05:48:11,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:48:11,246 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2024-11-14 05:48:11,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 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 05:48:11,247 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2024-11-14 05:48:11,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-14 05:48:11,248 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:11,248 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:48:11,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 05:48:11,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:11,449 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:48:11,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:11,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1211872666, now seen corresponding path program 1 times [2024-11-14 05:48:11,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:48:11,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360657629] [2024-11-14 05:48:11,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:11,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:48:11,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:48:12,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:48:12,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360657629] [2024-11-14 05:48:12,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360657629] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:48:12,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020132941] [2024-11-14 05:48:12,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:12,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:12,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:48:12,064 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:48:12,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 05:48:12,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:12,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-14 05:48:12,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:12,199 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 05:48:12,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 9 [2024-11-14 05:48:12,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 05:48:12,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 05:48:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:48:12,521 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:12,686 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_460 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_460) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2024-11-14 05:48:12,703 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:48:12,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 05:48:12,711 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:48:12,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:48:12,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2024-11-14 05:48:12,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020132941] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:12,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2137292664] [2024-11-14 05:48:12,842 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 05:48:12,842 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:48:12,842 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:48:12,842 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:48:12,842 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:48:13,756 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:48:15,151 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4153#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_55| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_55| Int)) (and (or (and (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_21| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_21| 4294967296) 0))) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_55| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_52| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_52| 4294967296) 0)) (exists ((|v_#memory_int_143| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_53| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_49| Int)) (and (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_49| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_53|)) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_49|) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_53|) 1) (= |#memory_int| (store |v_#memory_int_143| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_53| (store (select |v_#memory_int_143| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_53|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_49| 0))))) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_59| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_59| 4294967296) 0)) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_55| |ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (and (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_55|) 1) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_21| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_21| 4294967296) 0))) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_55| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_55|) (+ (- 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_55|)) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_52| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_52| 4294967296) 0)) (<= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_55| (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_55|)) (exists ((|v_#memory_int_143| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_53| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_49| Int)) (and (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_49| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_53|)) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_49|) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_53|) 1) (= |#memory_int| (store |v_#memory_int_143| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_53| (store (select |v_#memory_int_143| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_53|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_49| 0))))) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_59| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_59| 4294967296) 0)) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_55| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_55|))) (or (< |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_55| 0) (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_55|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_55| 1)))))' at error location [2024-11-14 05:48:15,151 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:48:15,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:48:15,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 26 [2024-11-14 05:48:15,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628629802] [2024-11-14 05:48:15,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:48:15,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 05:48:15,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:48:15,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 05:48:15,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1332, Unknown=23, NotChecked=74, Total=1560 [2024-11-14 05:48:15,153 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 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 05:48:17,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:48:17,511 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2024-11-14 05:48:17,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 05:48:17,511 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 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 25 [2024-11-14 05:48:17,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:48:17,512 INFO L225 Difference]: With dead ends: 93 [2024-11-14 05:48:17,512 INFO L226 Difference]: Without dead ends: 74 [2024-11-14 05:48:17,513 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=174, Invalid=1698, Unknown=24, NotChecked=84, Total=1980 [2024-11-14 05:48:17,513 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:48:17,514 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 257 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 242 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2024-11-14 05:48:17,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-14 05:48:17,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2024-11-14 05:48:17,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 72 states have internal predecessors, (83), 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 05:48:17,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2024-11-14 05:48:17,516 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 25 [2024-11-14 05:48:17,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:48:17,516 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2024-11-14 05:48:17,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 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 05:48:17,516 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2024-11-14 05:48:17,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 05:48:17,516 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:17,516 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:48:17,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 05:48:17,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:17,720 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:48:17,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:17,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1027949269, now seen corresponding path program 3 times [2024-11-14 05:48:17,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:48:17,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836079341] [2024-11-14 05:48:17,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:17,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:48:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:48:18,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:48:18,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836079341] [2024-11-14 05:48:18,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836079341] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:48:18,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187302214] [2024-11-14 05:48:18,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:48:18,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:18,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:48:18,243 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:48:18,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 05:48:18,367 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:48:18,367 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:48:18,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-14 05:48:18,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:18,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 05:48:18,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:48:18,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-14 05:48:19,018 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:48:19,018 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:19,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 05:48:19,144 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 16 treesize of output 12 [2024-11-14 05:48:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:48:19,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187302214] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:19,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1584842761] [2024-11-14 05:48:19,295 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-14 05:48:19,295 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:48:19,295 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:48:19,295 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:48:19,295 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:48:19,876 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:48:21,393 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4523#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_68| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_68| Int)) (and (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_68| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= |ULTIMATE.start_cstrlcpy_~s~0#1.offset| (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_68| 1)) (or (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_68|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_68| 1)) (< |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_68| 0))))' at error location [2024-11-14 05:48:21,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:48:21,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:48:21,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 29 [2024-11-14 05:48:21,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8156115] [2024-11-14 05:48:21,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:48:21,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-14 05:48:21,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:48:21,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-14 05:48:21,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1591, Unknown=8, NotChecked=0, Total=1722 [2024-11-14 05:48:21,395 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 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 05:48:22,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:48:22,145 INFO L93 Difference]: Finished difference Result 112 states and 127 transitions. [2024-11-14 05:48:22,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 05:48:22,145 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 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 26 [2024-11-14 05:48:22,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:48:22,146 INFO L225 Difference]: With dead ends: 112 [2024-11-14 05:48:22,146 INFO L226 Difference]: Without dead ends: 95 [2024-11-14 05:48:22,147 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=183, Invalid=2359, Unknown=8, NotChecked=0, Total=2550 [2024-11-14 05:48:22,147 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:48:22,148 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 265 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:48:22,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-14 05:48:22,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2024-11-14 05:48:22,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 84 states have internal predecessors, (98), 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 05:48:22,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2024-11-14 05:48:22,153 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 26 [2024-11-14 05:48:22,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:48:22,153 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2024-11-14 05:48:22,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 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 05:48:22,154 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2024-11-14 05:48:22,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-14 05:48:22,154 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:22,154 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:48:22,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 05:48:22,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:22,355 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:48:22,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:22,355 INFO L85 PathProgramCache]: Analyzing trace with hash -822857733, now seen corresponding path program 3 times [2024-11-14 05:48:22,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:48:22,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728879402] [2024-11-14 05:48:22,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:22,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:48:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:22,737 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:48:22,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:48:22,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728879402] [2024-11-14 05:48:22,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728879402] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:48:22,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533754279] [2024-11-14 05:48:22,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:48:22,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:22,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:48:22,740 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:48:22,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 05:48:22,870 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:48:22,871 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:48:22,873 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-14 05:48:22,876 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:22,892 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 05:48:23,060 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:48:23,061 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:48:23,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533754279] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:23,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1795462700] [2024-11-14 05:48:23,416 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:48:23,417 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:48:23,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:48:23,417 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:48:23,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:48:24,156 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:48:24,751 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4927#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_64| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_64| Int)) (and (or (< |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_64| 0) (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_64|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_64| 1))) (or (and (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_65| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_65| 4294967296) 0))) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_64|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_64| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (and (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_64|) (= (select |#valid| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) 1) (<= 1 (+ |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|)) (not (= (mod |ULTIMATE.start_cstrlcpy_~siz#1| 4294967296) 0)) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (exists ((|v_#memory_int_171| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length~0#1_97| Int)) (and (<= 1 (+ |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_97|)) (= |#memory_int| (store (store |v_#memory_int_171| |ULTIMATE.start_cstrlcpy_#t~post3#1.base| (store (select |v_#memory_int_171| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) 0)) |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_64| (store (select (store |v_#memory_int_171| |ULTIMATE.start_cstrlcpy_#t~post3#1.base| (store (select |v_#memory_int_171| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) 0)) |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_64|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_97|) 0))) (<= (+ |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_97|) (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_64|)))) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_64|) (= |ULTIMATE.start_cstrlcpy_~siz#1| (+ |ULTIMATE.start_cstrlcpy_~n~0#1| 1)) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_64|) 1) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_64| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= (+ |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (select |#length| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|)) (not (= (mod (+ |ULTIMATE.start_cstrlcpy_~siz#1| 4294967295) 4294967296) 0))))))' at error location [2024-11-14 05:48:24,751 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:48:24,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:48:24,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2024-11-14 05:48:24,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319160197] [2024-11-14 05:48:24,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:48:24,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 05:48:24,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:48:24,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 05:48:24,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2024-11-14 05:48:24,752 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand has 21 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 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 05:48:25,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:48:25,037 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2024-11-14 05:48:25,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 05:48:25,038 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 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 27 [2024-11-14 05:48:25,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:48:25,038 INFO L225 Difference]: With dead ends: 87 [2024-11-14 05:48:25,038 INFO L226 Difference]: Without dead ends: 87 [2024-11-14 05:48:25,039 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2024-11-14 05:48:25,039 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 30 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:48:25,039 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 238 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:48:25,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-14 05:48:25,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2024-11-14 05:48:25,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 85 states have internal predecessors, (99), 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 05:48:25,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2024-11-14 05:48:25,042 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 27 [2024-11-14 05:48:25,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:48:25,043 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2024-11-14 05:48:25,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 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 05:48:25,043 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2024-11-14 05:48:25,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 05:48:25,043 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:25,043 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:48:25,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 05:48:25,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:25,247 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:48:25,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:25,248 INFO L85 PathProgramCache]: Analyzing trace with hash 261214063, now seen corresponding path program 2 times [2024-11-14 05:48:25,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:48:25,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910344567] [2024-11-14 05:48:25,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:25,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:48:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:48:25,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:48:25,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910344567] [2024-11-14 05:48:25,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910344567] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:48:25,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414579125] [2024-11-14 05:48:25,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:48:25,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:25,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:48:25,563 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:48:25,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 05:48:25,807 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 05:48:25,807 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:48:25,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-14 05:48:25,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:48:25,998 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:26,194 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 05:48:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:48:26,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414579125] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:26,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [797234741] [2024-11-14 05:48:26,232 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:48:26,232 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:48:26,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:48:26,232 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:48:26,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:48:26,944 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:48:27,406 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5305#(and (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|))' at error location [2024-11-14 05:48:27,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:48:27,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:48:27,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2024-11-14 05:48:27,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164808035] [2024-11-14 05:48:27,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:48:27,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 05:48:27,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:48:27,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 05:48:27,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1072, Unknown=1, NotChecked=0, Total=1190 [2024-11-14 05:48:27,409 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 27 states have internal predecessors, (69), 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 05:48:27,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:48:27,804 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2024-11-14 05:48:27,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 05:48:27,805 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 27 states have internal predecessors, (69), 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 28 [2024-11-14 05:48:27,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:48:27,805 INFO L225 Difference]: With dead ends: 93 [2024-11-14 05:48:27,805 INFO L226 Difference]: Without dead ends: 93 [2024-11-14 05:48:27,806 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=153, Invalid=1328, Unknown=1, NotChecked=0, Total=1482 [2024-11-14 05:48:27,806 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 30 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:48:27,806 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 336 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:48:27,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-14 05:48:27,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2024-11-14 05:48:27,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 86 states have internal predecessors, (99), 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 05:48:27,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2024-11-14 05:48:27,809 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 28 [2024-11-14 05:48:27,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:48:27,809 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2024-11-14 05:48:27,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 27 states have internal predecessors, (69), 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 05:48:27,810 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2024-11-14 05:48:27,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 05:48:27,810 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:27,810 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:48:27,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 05:48:28,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-14 05:48:28,014 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:48:28,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:28,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1919098639, now seen corresponding path program 4 times [2024-11-14 05:48:28,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:48:28,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304843974] [2024-11-14 05:48:28,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:28,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:48:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:28,335 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:48:28,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:48:28,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304843974] [2024-11-14 05:48:28,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304843974] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:48:28,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202220365] [2024-11-14 05:48:28,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:48:28,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:28,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:48:28,338 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:48:28,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 05:48:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:28,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-14 05:48:28,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:28,457 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 05:48:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:48:28,636 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:28,993 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:48:28,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202220365] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:28,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [296716340] [2024-11-14 05:48:28,995 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-14 05:48:28,995 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:48:28,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:48:28,996 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:48:28,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:48:29,880 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:48:31,919 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5501#true' at error location [2024-11-14 05:48:31,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:48:31,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:48:31,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2024-11-14 05:48:31,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885380330] [2024-11-14 05:48:31,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:48:31,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-14 05:48:31,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:48:31,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-14 05:48:31,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1405, Unknown=12, NotChecked=0, Total=1560 [2024-11-14 05:48:31,921 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand has 28 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 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 05:48:32,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:48:32,441 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2024-11-14 05:48:32,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 05:48:32,442 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 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 28 [2024-11-14 05:48:32,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:48:32,443 INFO L225 Difference]: With dead ends: 130 [2024-11-14 05:48:32,443 INFO L226 Difference]: Without dead ends: 130 [2024-11-14 05:48:32,444 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=178, Invalid=1702, Unknown=12, NotChecked=0, Total=1892 [2024-11-14 05:48:32,444 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 58 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:48:32,445 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 418 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:48:32,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-14 05:48:32,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 121. [2024-11-14 05:48:32,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 117 states have (on average 1.170940170940171) internal successors, (137), 120 states have internal predecessors, (137), 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 05:48:32,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 137 transitions. [2024-11-14 05:48:32,452 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 137 transitions. Word has length 28 [2024-11-14 05:48:32,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:48:32,453 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 137 transitions. [2024-11-14 05:48:32,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 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 05:48:32,453 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 137 transitions. [2024-11-14 05:48:32,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-14 05:48:32,453 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:32,453 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:48:32,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-14 05:48:32,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-14 05:48:32,654 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:48:32,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:32,654 INFO L85 PathProgramCache]: Analyzing trace with hash -2002371837, now seen corresponding path program 2 times [2024-11-14 05:48:32,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:48:32,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323323565] [2024-11-14 05:48:32,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:32,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:48:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:48:33,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:48:33,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323323565] [2024-11-14 05:48:33,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323323565] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:48:33,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064448596] [2024-11-14 05:48:33,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:48:33,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:33,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:48:33,930 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:48:33,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 05:48:34,078 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 05:48:34,079 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:48:34,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-14 05:48:34,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:34,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 05:48:34,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:48:34,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-14 05:48:34,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:48:34,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-14 05:48:34,717 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:48:34,717 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:44,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 266 treesize of output 254 [2024-11-14 05:48:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:48:45,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064448596] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:45,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [667590278] [2024-11-14 05:48:45,234 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 05:48:45,234 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:48:45,234 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:48:45,235 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:48:45,235 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:48:45,872 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:48:49,812 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6175#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_92| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_93| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_92|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_93| 1)) (< |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_93| 0)) (or (and (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_93| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_29| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_29| 4294967296) 0))) (exists ((|v_#memory_int_229| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_84| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_88| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_88|) 1) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_84|) (= |#memory_int| (store |v_#memory_int_229| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_88| (store (select |v_#memory_int_229| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_88|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_84| 0))) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_84| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_88|)))) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_92| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_94| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_94| 4294967296) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_85| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_85| 4294967296) 0))) (and (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_92|) 1) (<= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_93| (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_92|)) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_93| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_29| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_29| 4294967296) 0))) (exists ((|v_#memory_int_229| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_84| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_88| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_88|) 1) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_84|) (= |#memory_int| (store |v_#memory_int_229| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_88| (store (select |v_#memory_int_229| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_88|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_84| 0))) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_84| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_88|)))) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_92| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_92|) (+ (- 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_93|)) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_94| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_94| 4294967296) 0)) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_93|) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_85| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_85| 4294967296) 0))))))' at error location [2024-11-14 05:48:49,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:48:49,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:48:49,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 13] total 38 [2024-11-14 05:48:49,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924948903] [2024-11-14 05:48:49,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:48:49,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-14 05:48:49,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:48:49,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-14 05:48:49,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2494, Unknown=3, NotChecked=0, Total=2652 [2024-11-14 05:48:49,814 INFO L87 Difference]: Start difference. First operand 121 states and 137 transitions. Second operand has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 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 05:48:51,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:48:51,571 INFO L93 Difference]: Finished difference Result 131 states and 146 transitions. [2024-11-14 05:48:51,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 05:48:51,571 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 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 30 [2024-11-14 05:48:51,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:48:51,572 INFO L225 Difference]: With dead ends: 131 [2024-11-14 05:48:51,572 INFO L226 Difference]: Without dead ends: 112 [2024-11-14 05:48:51,573 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=282, Invalid=4137, Unknown=3, NotChecked=0, Total=4422 [2024-11-14 05:48:51,574 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:48:51,574 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 377 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 05:48:51,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-14 05:48:51,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2024-11-14 05:48:51,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 110 states have internal predecessors, (125), 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 05:48:51,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2024-11-14 05:48:51,578 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 30 [2024-11-14 05:48:51,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:48:51,578 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2024-11-14 05:48:51,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 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 05:48:51,579 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2024-11-14 05:48:51,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-14 05:48:51,579 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:51,579 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:48:51,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-14 05:48:51,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:51,780 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:48:51,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:51,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1557922816, now seen corresponding path program 5 times [2024-11-14 05:48:51,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:48:51,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104236753] [2024-11-14 05:48:51,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:51,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:48:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:52,663 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:48:52,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:48:52,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104236753] [2024-11-14 05:48:52,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104236753] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:48:52,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831344134] [2024-11-14 05:48:52,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:48:52,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:52,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:48:52,666 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:48:52,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 05:48:52,832 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 05:48:52,832 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:48:52,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-14 05:48:52,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:52,845 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 05:48:53,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 9 [2024-11-14 05:48:53,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:48:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:48:53,198 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:53,329 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:48:53,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 05:48:53,343 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:48:53,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:48:53,464 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:48:53,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831344134] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:53,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [318147723] [2024-11-14 05:48:53,465 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-14 05:48:53,465 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:48:53,465 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:48:53,465 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:48:53,466 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:48:54,190 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:48:56,761 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6460#true' at error location [2024-11-14 05:48:56,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:48:56,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:48:56,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 27 [2024-11-14 05:48:56,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885452384] [2024-11-14 05:48:56,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:48:56,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-14 05:48:56,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:48:56,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-14 05:48:56,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1441, Unknown=24, NotChecked=0, Total=1560 [2024-11-14 05:48:56,763 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 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 05:48:57,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:48:57,788 INFO L93 Difference]: Finished difference Result 153 states and 172 transitions. [2024-11-14 05:48:57,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 05:48:57,789 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 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 31 [2024-11-14 05:48:57,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:48:57,789 INFO L225 Difference]: With dead ends: 153 [2024-11-14 05:48:57,789 INFO L226 Difference]: Without dead ends: 133 [2024-11-14 05:48:57,791 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=159, Invalid=2364, Unknown=27, NotChecked=0, Total=2550 [2024-11-14 05:48:57,791 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:48:57,791 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 352 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:48:57,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-14 05:48:57,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2024-11-14 05:48:57,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 119 states have (on average 1.1764705882352942) internal successors, (140), 122 states have internal predecessors, (140), 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 05:48:57,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 140 transitions. [2024-11-14 05:48:57,799 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 140 transitions. Word has length 31 [2024-11-14 05:48:57,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:48:57,799 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 140 transitions. [2024-11-14 05:48:57,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 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 05:48:57,800 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 140 transitions. [2024-11-14 05:48:57,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-14 05:48:57,800 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:48:57,800 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:48:57,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-14 05:48:58,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-14 05:48:58,001 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:48:58,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:48:58,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1245068992, now seen corresponding path program 4 times [2024-11-14 05:48:58,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:48:58,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43745648] [2024-11-14 05:48:58,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:48:58,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:48:58,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:58,313 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 05:48:58,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:48:58,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43745648] [2024-11-14 05:48:58,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43745648] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:48:58,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877968934] [2024-11-14 05:48:58,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:48:58,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:48:58,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:48:58,317 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:48:58,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 05:48:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:48:58,492 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-14 05:48:58,494 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:48:58,500 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 05:48:58,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 9 [2024-11-14 05:48:58,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:48:58,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 05:48:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:48:59,063 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:48:59,080 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_729 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_729) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2024-11-14 05:48:59,090 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_729 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_729) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2024-11-14 05:48:59,185 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_729 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_729) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:48:59,198 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:48:59,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 05:48:59,207 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:48:59,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:48:59,363 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 12 not checked. [2024-11-14 05:48:59,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877968934] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:48:59,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [712354347] [2024-11-14 05:48:59,365 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:48:59,365 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:48:59,365 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:48:59,365 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:48:59,365 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:49:00,152 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:49:01,125 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7193#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_97| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_97| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_97|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_97| 1)) (< |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_97| 0)) (or (and (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_97|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_97| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_99| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_99| 4294967296) 0))) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|)) (and (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_97|) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_97|) 1) (= (select |#valid| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) 1) (<= 1 (+ |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|)) (not (= (mod |ULTIMATE.start_cstrlcpy_~n~0#1| 4294967296) 0)) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_97| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (not (= 0 (mod (+ |ULTIMATE.start_cstrlcpy_~n~0#1| 1) 4294967296))) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |ULTIMATE.start_cstrlcpy_~siz#1| (+ |ULTIMATE.start_cstrlcpy_~n~0#1| 1)) (exists ((|v_ULTIMATE.start_main_~length~0#1_116| Int) (|v_#memory_int_262| (Array Int (Array Int Int)))) (and (= |#memory_int| (store (store |v_#memory_int_262| |ULTIMATE.start_cstrlcpy_#t~post3#1.base| (store (select |v_#memory_int_262| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) 0)) |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_97| (store (select (store |v_#memory_int_262| |ULTIMATE.start_cstrlcpy_#t~post3#1.base| (store (select |v_#memory_int_262| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) 0)) |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_97|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_116|) 0))) (<= (+ |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_116|) (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_97|)) (<= 1 (+ |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_116|)))) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_97|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= (+ |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (select |#length| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|))))))' at error location [2024-11-14 05:49:01,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:49:01,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:49:01,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 29 [2024-11-14 05:49:01,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295365368] [2024-11-14 05:49:01,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:49:01,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-14 05:49:01,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:49:01,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-14 05:49:01,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1162, Unknown=17, NotChecked=210, Total=1482 [2024-11-14 05:49:01,127 INFO L87 Difference]: Start difference. First operand 123 states and 140 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 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 05:49:02,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:49:02,318 INFO L93 Difference]: Finished difference Result 171 states and 190 transitions. [2024-11-14 05:49:02,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-14 05:49:02,319 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 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 32 [2024-11-14 05:49:02,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:49:02,319 INFO L225 Difference]: With dead ends: 171 [2024-11-14 05:49:02,319 INFO L226 Difference]: Without dead ends: 166 [2024-11-14 05:49:02,320 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=178, Invalid=2363, Unknown=21, NotChecked=300, Total=2862 [2024-11-14 05:49:02,320 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:49:02,320 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 395 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 780 Invalid, 0 Unknown, 267 Unchecked, 0.6s Time] [2024-11-14 05:49:02,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-14 05:49:02,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 140. [2024-11-14 05:49:02,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 136 states have (on average 1.161764705882353) internal successors, (158), 139 states have internal predecessors, (158), 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 05:49:02,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 158 transitions. [2024-11-14 05:49:02,325 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 158 transitions. Word has length 32 [2024-11-14 05:49:02,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:49:02,325 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 158 transitions. [2024-11-14 05:49:02,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 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 05:49:02,326 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 158 transitions. [2024-11-14 05:49:02,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 05:49:02,326 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:49:02,326 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:49:02,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-14 05:49:02,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:49:02,530 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:49:02,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:49:02,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1627341818, now seen corresponding path program 6 times [2024-11-14 05:49:02,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:49:02,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638963905] [2024-11-14 05:49:02,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:49:02,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:49:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:49:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:49:03,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:49:03,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638963905] [2024-11-14 05:49:03,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638963905] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:49:03,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459454141] [2024-11-14 05:49:03,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:49:03,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:49:03,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:49:03,071 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:49:03,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 05:49:03,210 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:49:03,210 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:49:03,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-14 05:49:03,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:49:03,222 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 05:49:03,450 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:49:03,450 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:49:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:49:03,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459454141] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:49:03,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1696531761] [2024-11-14 05:49:03,901 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-14 05:49:03,901 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:49:03,901 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:49:03,902 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:49:03,902 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:49:04,559 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:49:06,596 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7547#true' at error location [2024-11-14 05:49:06,596 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:49:06,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:49:06,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2024-11-14 05:49:06,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732579267] [2024-11-14 05:49:06,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:49:06,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-14 05:49:06,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:49:06,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-14 05:49:06,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1621, Unknown=11, NotChecked=0, Total=1806 [2024-11-14 05:49:06,598 INFO L87 Difference]: Start difference. First operand 140 states and 158 transitions. Second operand has 31 states, 30 states have (on average 2.9) internal successors, (87), 30 states have internal predecessors, (87), 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 05:49:07,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:49:07,515 INFO L93 Difference]: Finished difference Result 212 states and 234 transitions. [2024-11-14 05:49:07,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 05:49:07,515 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.9) internal successors, (87), 30 states have internal predecessors, (87), 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 33 [2024-11-14 05:49:07,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:49:07,516 INFO L225 Difference]: With dead ends: 212 [2024-11-14 05:49:07,516 INFO L226 Difference]: Without dead ends: 212 [2024-11-14 05:49:07,517 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=218, Invalid=2027, Unknown=11, NotChecked=0, Total=2256 [2024-11-14 05:49:07,517 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 92 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:49:07,517 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 544 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 05:49:07,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2024-11-14 05:49:07,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 184. [2024-11-14 05:49:07,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 180 states have (on average 1.1555555555555554) internal successors, (208), 183 states have internal predecessors, (208), 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 05:49:07,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 208 transitions. [2024-11-14 05:49:07,524 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 208 transitions. Word has length 33 [2024-11-14 05:49:07,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:49:07,525 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 208 transitions. [2024-11-14 05:49:07,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.9) internal successors, (87), 30 states have internal predecessors, (87), 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 05:49:07,525 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 208 transitions. [2024-11-14 05:49:07,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 05:49:07,526 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:49:07,526 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:49:07,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-14 05:49:07,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:49:07,730 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:49:07,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:49:07,731 INFO L85 PathProgramCache]: Analyzing trace with hash 674064445, now seen corresponding path program 3 times [2024-11-14 05:49:07,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:49:07,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107347599] [2024-11-14 05:49:07,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:49:07,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:49:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:49:09,106 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:49:09,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:49:09,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107347599] [2024-11-14 05:49:09,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107347599] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:49:09,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842287197] [2024-11-14 05:49:09,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:49:09,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:49:09,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:49:09,109 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:49:09,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-14 05:49:09,275 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:49:09,276 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:49:09,278 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-14 05:49:09,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:49:09,285 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 05:49:09,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 9 [2024-11-14 05:49:09,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:49:09,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 05:49:09,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 05:49:09,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-14 05:49:09,869 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:49:09,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:49:09,879 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_816 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_816) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2024-11-14 05:49:09,900 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_816 (Array Int Int)) (v_ArrVal_815 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_815) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_816) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2024-11-14 05:49:09,909 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_816 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_816) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2024-11-14 05:49:09,921 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_814 (Array Int Int)) (v_ArrVal_816 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_814) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_816) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2024-11-14 05:49:09,930 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_816 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_816) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:49:09,942 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:49:09,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 05:49:09,951 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:49:09,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:49:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 9 not checked. [2024-11-14 05:49:10,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842287197] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:49:10,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [273673747] [2024-11-14 05:49:10,093 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 05:49:10,093 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:49:10,093 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:49:10,093 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:49:10,093 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:49:12,670 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:49:43,425 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8423#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_131| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_132| Int)) (and (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_132|) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_131|) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_132|) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_131| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_132| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|)))' at error location [2024-11-14 05:49:43,426 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:49:43,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:49:43,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 14] total 36 [2024-11-14 05:49:43,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949943464] [2024-11-14 05:49:43,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:49:43,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-14 05:49:43,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:49:43,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-14 05:49:43,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2374, Unknown=23, NotChecked=510, Total=3080 [2024-11-14 05:49:43,428 INFO L87 Difference]: Start difference. First operand 184 states and 208 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 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 05:49:44,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:49:44,854 INFO L93 Difference]: Finished difference Result 192 states and 216 transitions. [2024-11-14 05:49:44,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-14 05:49:44,854 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 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 05:49:44,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:49:44,855 INFO L225 Difference]: With dead ends: 192 [2024-11-14 05:49:44,855 INFO L226 Difference]: Without dead ends: 161 [2024-11-14 05:49:44,857 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 32.7s TimeCoverageRelationStatistics Valid=270, Invalid=3633, Unknown=23, NotChecked=630, Total=4556 [2024-11-14 05:49:44,857 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 252 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:49:44,858 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 486 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 533 Invalid, 0 Unknown, 252 Unchecked, 0.4s Time] [2024-11-14 05:49:44,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-14 05:49:44,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2024-11-14 05:49:44,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 157 states have (on average 1.1656050955414012) internal successors, (183), 160 states have internal predecessors, (183), 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 05:49:44,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 183 transitions. [2024-11-14 05:49:44,862 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 183 transitions. Word has length 34 [2024-11-14 05:49:44,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:49:44,862 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 183 transitions. [2024-11-14 05:49:44,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 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 05:49:44,863 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 183 transitions. [2024-11-14 05:49:44,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 05:49:44,863 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:49:44,863 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:49:44,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-14 05:49:45,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-14 05:49:45,064 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:49:45,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:49:45,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1413792274, now seen corresponding path program 4 times [2024-11-14 05:49:45,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:49:45,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159944131] [2024-11-14 05:49:45,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:49:45,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:49:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:49:45,733 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:49:45,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:49:45,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159944131] [2024-11-14 05:49:45,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159944131] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:49:45,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477830896] [2024-11-14 05:49:45,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:49:45,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:49:45,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:49:45,736 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:49:45,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-14 05:49:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:49:45,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-14 05:49:45,861 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:49:46,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:49:46,192 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-14 05:49:46,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-14 05:49:46,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-14 05:49:46,695 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:49:46,695 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:49:47,139 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:49:47,140 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2024-11-14 05:49:47,153 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_118| Int) (v_arrayElimArr_7 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_118| v_arrayElimArr_7) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (or (= (select .cse0 (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0) (not (= (select v_arrayElimArr_7 (+ |c_ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1)) 0)) (= (select .cse0 (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)))) is different from false [2024-11-14 05:49:47,186 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:49:47,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2024-11-14 05:49:47,209 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:49:47,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 59 [2024-11-14 05:49:47,232 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:49:47,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 37 [2024-11-14 05:49:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2024-11-14 05:49:47,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477830896] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:49:47,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [446587971] [2024-11-14 05:49:47,840 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 05:49:47,840 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:49:47,841 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:49:47,841 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:49:47,841 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:49:48,445 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:49:50,469 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9073#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_144| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_145| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_144|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_145| 1)) (< |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_145| 0)) (or (and (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_145| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_144| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_38| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_38| 4294967296) 0))) (exists ((|v_#memory_int_329| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_124| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_116| Int)) (and (= |#memory_int| (store |v_#memory_int_329| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_124| (store (select |v_#memory_int_329| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_124|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_116| 0))) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_116|) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_116| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_124|)) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_124|) 1))) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_130| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_130| 4294967296) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_119| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_119| 4294967296) 0))) (and (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_145|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_145| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_145| (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_144|)) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_144| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_38| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_38| 4294967296) 0))) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_144|) (+ (- 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_145|)) 0)) (exists ((|v_#memory_int_329| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_124| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_116| Int)) (and (= |#memory_int| (store |v_#memory_int_329| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_124| (store (select |v_#memory_int_329| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_124|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_116| 0))) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_116|) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_116| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_124|)) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_124|) 1))) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_130| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_130| 4294967296) 0)) (= 1 (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_144|)) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_119| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_119| 4294967296) 0))))))' at error location [2024-11-14 05:49:50,469 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:49:50,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:49:50,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2024-11-14 05:49:50,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879058677] [2024-11-14 05:49:50,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:49:50,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-14 05:49:50,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:49:50,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-14 05:49:50,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3004, Unknown=8, NotChecked=110, Total=3306 [2024-11-14 05:49:50,471 INFO L87 Difference]: Start difference. First operand 161 states and 183 transitions. Second operand has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 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 05:49:51,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:49:51,577 INFO L93 Difference]: Finished difference Result 181 states and 202 transitions. [2024-11-14 05:49:51,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-14 05:49:51,578 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 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 05:49:51,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:49:51,579 INFO L225 Difference]: With dead ends: 181 [2024-11-14 05:49:51,579 INFO L226 Difference]: Without dead ends: 159 [2024-11-14 05:49:51,580 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=289, Invalid=4677, Unknown=8, NotChecked=138, Total=5112 [2024-11-14 05:49:51,580 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:49:51,580 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 432 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 646 Invalid, 0 Unknown, 47 Unchecked, 0.4s Time] [2024-11-14 05:49:51,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-14 05:49:51,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2024-11-14 05:49:51,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 154 states have (on average 1.155844155844156) internal successors, (178), 157 states have internal predecessors, (178), 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 05:49:51,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 178 transitions. [2024-11-14 05:49:51,583 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 178 transitions. Word has length 35 [2024-11-14 05:49:51,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:49:51,583 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 178 transitions. [2024-11-14 05:49:51,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 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 05:49:51,584 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 178 transitions. [2024-11-14 05:49:51,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-14 05:49:51,585 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:49:51,585 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:49:51,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-14 05:49:51,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:49:51,786 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:49:51,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:49:51,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1486964910, now seen corresponding path program 5 times [2024-11-14 05:49:51,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:49:51,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181641520] [2024-11-14 05:49:51,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:49:51,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:49:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:49:52,243 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 05:49:52,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:49:52,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181641520] [2024-11-14 05:49:52,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181641520] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:49:52,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725138926] [2024-11-14 05:49:52,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:49:52,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:49:52,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:49:52,246 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:49:52,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-14 05:49:52,459 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 05:49:52,459 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:49:52,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-14 05:49:52,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:49:52,469 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 05:49:52,734 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 05:49:52,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:49:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 05:49:53,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725138926] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:49:53,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [899613256] [2024-11-14 05:49:53,168 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:49:53,168 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:49:53,168 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:49:53,168 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:49:53,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:49:53,782 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:49:54,642 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9695#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_127| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_126| Int)) (and (or (and (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_126| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_130| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_130| 4294967296) 0))) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_127| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (and (= (select |#valid| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) 1) (<= 1 (+ |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|)) (exists ((|v_ULTIMATE.start_main_~length~0#1_132| Int) (|v_#memory_int_347| (Array Int (Array Int Int)))) (and (<= 1 (+ |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_132|)) (<= (+ |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_132|) (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_126|)) (= |#memory_int| (store (store |v_#memory_int_347| |ULTIMATE.start_cstrlcpy_#t~post3#1.base| (store (select |v_#memory_int_347| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) 0)) |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_126| (store (select (store |v_#memory_int_347| |ULTIMATE.start_cstrlcpy_#t~post3#1.base| (store (select |v_#memory_int_347| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) 0)) |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_126|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_132|) 0))))) (not (= (mod |ULTIMATE.start_cstrlcpy_~siz#1| 4294967296) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_126|) 1) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_126| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= |ULTIMATE.start_cstrlcpy_~siz#1| (+ |ULTIMATE.start_cstrlcpy_~n~0#1| 1)) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_127| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= (+ |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (select |#length| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|)) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_127|) (not (= (mod (+ |ULTIMATE.start_cstrlcpy_~siz#1| 4294967295) 4294967296) 0)))) (or (< |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_127| 0) (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_126|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_127| 1)))))' at error location [2024-11-14 05:49:54,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:49:54,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:49:54,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2024-11-14 05:49:54,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104841468] [2024-11-14 05:49:54,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:49:54,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-14 05:49:54,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:49:54,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-14 05:49:54,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 05:49:54,644 INFO L87 Difference]: Start difference. First operand 158 states and 178 transitions. Second operand has 32 states, 31 states have (on average 3.096774193548387) internal successors, (96), 31 states have internal predecessors, (96), 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 05:49:55,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:49:55,231 INFO L93 Difference]: Finished difference Result 170 states and 190 transitions. [2024-11-14 05:49:55,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 05:49:55,232 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.096774193548387) internal successors, (96), 31 states have internal predecessors, (96), 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 36 [2024-11-14 05:49:55,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:49:55,233 INFO L225 Difference]: With dead ends: 170 [2024-11-14 05:49:55,233 INFO L226 Difference]: Without dead ends: 170 [2024-11-14 05:49:55,233 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=215, Invalid=1855, Unknown=0, NotChecked=0, Total=2070 [2024-11-14 05:49:55,234 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 78 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:49:55,234 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 345 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:49:55,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-14 05:49:55,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 162. [2024-11-14 05:49:55,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 158 states have (on average 1.1518987341772151) internal successors, (182), 161 states have internal predecessors, (182), 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 05:49:55,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 182 transitions. [2024-11-14 05:49:55,239 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 182 transitions. Word has length 36 [2024-11-14 05:49:55,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:49:55,239 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 182 transitions. [2024-11-14 05:49:55,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.096774193548387) internal successors, (96), 31 states have internal predecessors, (96), 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 05:49:55,239 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 182 transitions. [2024-11-14 05:49:55,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-14 05:49:55,240 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:49:55,240 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:49:55,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-14 05:49:55,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-14 05:49:55,441 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:49:55,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:49:55,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1450782633, now seen corresponding path program 7 times [2024-11-14 05:49:55,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:49:55,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708687368] [2024-11-14 05:49:55,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:49:55,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:49:55,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:49:56,150 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:49:56,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:49:56,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708687368] [2024-11-14 05:49:56,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708687368] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:49:56,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062674439] [2024-11-14 05:49:56,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:49:56,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:49:56,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:49:56,152 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:49:56,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-14 05:49:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:49:56,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-14 05:49:56,305 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:49:56,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:49:56,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-14 05:49:57,313 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:49:57,313 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:49:57,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-14 05:49:57,676 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:49:57,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2024-11-14 05:49:58,069 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:49:58,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062674439] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:49:58,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2073137579] [2024-11-14 05:49:58,070 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-14 05:49:58,071 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:49:58,071 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:49:58,071 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:49:58,071 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:49:58,897 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:50:01,899 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10045#true' at error location [2024-11-14 05:50:01,899 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:50:01,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:50:01,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 17] total 43 [2024-11-14 05:50:01,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553367170] [2024-11-14 05:50:01,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:50:01,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-14 05:50:01,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:50:01,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-14 05:50:01,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2898, Unknown=12, NotChecked=0, Total=3080 [2024-11-14 05:50:01,901 INFO L87 Difference]: Start difference. First operand 162 states and 182 transitions. Second operand has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 43 states have internal predecessors, (91), 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 05:50:03,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:50:03,441 INFO L93 Difference]: Finished difference Result 216 states and 242 transitions. [2024-11-14 05:50:03,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 05:50:03,442 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 43 states have internal predecessors, (91), 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 36 [2024-11-14 05:50:03,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:50:03,443 INFO L225 Difference]: With dead ends: 216 [2024-11-14 05:50:03,443 INFO L226 Difference]: Without dead ends: 193 [2024-11-14 05:50:03,444 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=236, Invalid=4042, Unknown=12, NotChecked=0, Total=4290 [2024-11-14 05:50:03,444 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:50:03,445 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 563 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 05:50:03,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-11-14 05:50:03,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 176. [2024-11-14 05:50:03,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 172 states have (on average 1.1627906976744187) internal successors, (200), 175 states have internal predecessors, (200), 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 05:50:03,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 200 transitions. [2024-11-14 05:50:03,450 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 200 transitions. Word has length 36 [2024-11-14 05:50:03,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:50:03,450 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 200 transitions. [2024-11-14 05:50:03,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 43 states have internal predecessors, (91), 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 05:50:03,451 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 200 transitions. [2024-11-14 05:50:03,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-14 05:50:03,452 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:50:03,452 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:50:03,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-14 05:50:03,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:50:03,653 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:50:03,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:50:03,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1148728036, now seen corresponding path program 3 times [2024-11-14 05:50:03,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:50:03,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440706585] [2024-11-14 05:50:03,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:50:03,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:50:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 05:50:03,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:50:03,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440706585] [2024-11-14 05:50:03,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440706585] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:50:03,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963858874] [2024-11-14 05:50:03,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:50:03,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:50:03,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:50:03,979 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:50:03,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-14 05:50:04,312 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:50:04,313 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:50:04,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-14 05:50:04,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:50:04,611 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 05:50:04,611 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:50:04,862 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 21 treesize of output 17 [2024-11-14 05:50:05,008 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 05:50:05,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963858874] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:50:05,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1488601736] [2024-11-14 05:50:05,009 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:50:05,009 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:50:05,009 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:50:05,010 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:50:05,010 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:50:05,495 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:50:06,821 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10971#(and (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_136| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_142| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_142|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_136|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_136|) (<= 1 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|))))' at error location [2024-11-14 05:50:06,822 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:50:06,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:50:06,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2024-11-14 05:50:06,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666058119] [2024-11-14 05:50:06,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:50:06,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-14 05:50:06,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:50:06,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-14 05:50:06,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1772, Unknown=2, NotChecked=0, Total=1980 [2024-11-14 05:50:06,823 INFO L87 Difference]: Start difference. First operand 176 states and 200 transitions. Second operand has 32 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 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 05:50:07,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:50:07,323 INFO L93 Difference]: Finished difference Result 192 states and 214 transitions. [2024-11-14 05:50:07,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 05:50:07,323 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 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 37 [2024-11-14 05:50:07,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:50:07,324 INFO L225 Difference]: With dead ends: 192 [2024-11-14 05:50:07,324 INFO L226 Difference]: Without dead ends: 192 [2024-11-14 05:50:07,324 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=244, Invalid=2106, Unknown=2, NotChecked=0, Total=2352 [2024-11-14 05:50:07,325 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 24 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:50:07,325 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 510 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:50:07,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-14 05:50:07,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 177. [2024-11-14 05:50:07,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 173 states have (on average 1.1502890173410405) internal successors, (199), 176 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:50:07,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 199 transitions. [2024-11-14 05:50:07,329 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 199 transitions. Word has length 37 [2024-11-14 05:50:07,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:50:07,329 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 199 transitions. [2024-11-14 05:50:07,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 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 05:50:07,329 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 199 transitions. [2024-11-14 05:50:07,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-14 05:50:07,329 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:50:07,329 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:50:07,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-14 05:50:07,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-14 05:50:07,530 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:50:07,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:50:07,530 INFO L85 PathProgramCache]: Analyzing trace with hash -792425629, now seen corresponding path program 8 times [2024-11-14 05:50:07,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:50:07,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752590447] [2024-11-14 05:50:07,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:50:07,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:50:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:08,073 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 16 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:50:08,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:50:08,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752590447] [2024-11-14 05:50:08,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752590447] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:50:08,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243358929] [2024-11-14 05:50:08,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:50:08,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:50:08,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:50:08,076 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:50:08,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-14 05:50:08,274 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 05:50:08,274 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:50:08,276 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-14 05:50:08,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:50:08,620 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 16 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:50:08,620 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:50:08,969 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 05:50:09,094 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 16 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:50:09,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243358929] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:50:09,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1418381487] [2024-11-14 05:50:09,095 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-14 05:50:09,095 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:50:09,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:50:09,095 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:50:09,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:50:09,666 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:50:11,933 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11621#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_183| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_181| Int)) (and (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_183|) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_181| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_183| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_181|) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_183|)))' at error location [2024-11-14 05:50:11,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:50:11,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:50:11,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2024-11-14 05:50:11,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086853659] [2024-11-14 05:50:11,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:50:11,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-14 05:50:11,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:50:11,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-14 05:50:11,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=2380, Unknown=13, NotChecked=0, Total=2652 [2024-11-14 05:50:11,935 INFO L87 Difference]: Start difference. First operand 177 states and 199 transitions. Second operand has 38 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 37 states have internal predecessors, (100), 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 05:50:12,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:50:12,876 INFO L93 Difference]: Finished difference Result 260 states and 287 transitions. [2024-11-14 05:50:12,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 05:50:12,876 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 37 states have internal predecessors, (100), 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 38 [2024-11-14 05:50:12,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:50:12,877 INFO L225 Difference]: With dead ends: 260 [2024-11-14 05:50:12,877 INFO L226 Difference]: Without dead ends: 260 [2024-11-14 05:50:12,877 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 70 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=338, Invalid=2955, Unknown=13, NotChecked=0, Total=3306 [2024-11-14 05:50:12,878 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 83 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:50:12,878 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 745 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 05:50:12,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-11-14 05:50:12,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 226. [2024-11-14 05:50:12,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 222 states have (on average 1.1486486486486487) internal successors, (255), 225 states have internal predecessors, (255), 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 05:50:12,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 255 transitions. [2024-11-14 05:50:12,883 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 255 transitions. Word has length 38 [2024-11-14 05:50:12,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:50:12,884 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 255 transitions. [2024-11-14 05:50:12,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 37 states have internal predecessors, (100), 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 05:50:12,884 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 255 transitions. [2024-11-14 05:50:12,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-14 05:50:12,885 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:50:12,885 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:50:12,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-14 05:50:13,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:50:13,085 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:50:13,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:50:13,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1261838232, now seen corresponding path program 5 times [2024-11-14 05:50:13,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:50:13,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057791744] [2024-11-14 05:50:13,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:50:13,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:50:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:50:15,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:50:15,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057791744] [2024-11-14 05:50:15,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057791744] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:50:15,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388315219] [2024-11-14 05:50:15,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:50:15,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:50:15,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:50:15,139 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:50:15,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-14 05:50:15,287 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 05:50:15,287 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:50:15,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-14 05:50:15,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:50:15,299 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 05:50:15,302 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 05:50:15,305 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 18 treesize of output 16 [2024-11-14 05:50:15,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2024-11-14 05:50:15,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2024-11-14 05:50:21,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2024-11-14 05:50:29,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 22 [2024-11-14 05:50:33,384 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-11-14 05:50:33,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 31 [2024-11-14 05:50:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 11 refuted. 8 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:50:33,724 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:50:35,034 WARN L851 $PredicateComparison]: unable to prove that (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post4#1.base|) |c_ULTIMATE.start_cstrlcpy_#t~post4#1.offset|) 0) (and (<= (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (<= 0 (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|))) (forall ((v_ArrVal_1098 (Array Int Int)) (v_ArrVal_1097 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1097) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1098) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (or (= (select .cse0 (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0) (= (select .cse0 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0))))) is different from false [2024-11-14 05:50:35,392 WARN L851 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1096 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1096) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) (and (<= (+ 5 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (<= 0 (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|))) (forall ((v_ArrVal_1098 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1098) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (or (= 0 (select .cse0 (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|))) (= (select .cse0 (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0))))) is different from false [2024-11-14 05:50:35,444 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:50:35,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 48 [2024-11-14 05:50:35,476 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:50:35,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 86 [2024-11-14 05:50:35,489 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 3 [2024-11-14 05:50:35,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-11-14 05:50:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 5 not checked. [2024-11-14 05:50:36,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388315219] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:50:36,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [612784227] [2024-11-14 05:50:36,454 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 05:50:36,454 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:50:36,454 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:50:36,454 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:50:36,454 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:50:39,844 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:51:13,538 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12424#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_194| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_192| Int)) (and (or (< |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_194| 0) (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_192|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_194| 1))) (or (and (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_194| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_192| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_154| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_152| Int) (|v_#memory_int_430| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_163| Int) (|v_ULTIMATE.start_cstrlcpy_~n~0#1_167| Int) (|v_ULTIMATE.start_cstrlcpy_~siz#1_46| Int)) (and (= (+ |v_ULTIMATE.start_cstrlcpy_~n~0#1_167| 1) |v_ULTIMATE.start_cstrlcpy_~siz#1_46|) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_154| 4294967296) 0) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_152|) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_163|) 1) (= (+ 1 |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_154|) |v_ULTIMATE.start_cstrlcpy_~siz#1_46|) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_192|) 1) (<= 1 (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_152| |v_ULTIMATE.start_cstrlcpy_~siz#1_46|)) (= |#memory_int| (store |v_#memory_int_430| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_163| (store (select |v_#memory_int_430| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_163|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_152| 0))) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_194|) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_152| |v_ULTIMATE.start_cstrlcpy_~siz#1_46|) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_163|)) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_152| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_163|)) (exists ((|v_ULTIMATE.start_main_~length~0#1_147| Int) (|v_#memory_int_425| (Array Int (Array Int Int)))) (and (= (store (store |v_#memory_int_425| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_163| (store (select |v_#memory_int_425| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_163|) (+ (- 1) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_152| |v_ULTIMATE.start_cstrlcpy_~siz#1_46|) 0)) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_192| (store (select (store |v_#memory_int_425| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_163| (store (select |v_#memory_int_425| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_163|) (+ (- 1) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_152| |v_ULTIMATE.start_cstrlcpy_~siz#1_46|) 0)) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_192|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_147|) 0)) |v_#memory_int_430|) (<= (+ |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_147|) (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_192|)) (<= 1 (+ |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_147|))))))) (and (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_194| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_192| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_194|)))))' at error location [2024-11-14 05:51:13,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:51:13,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:51:13,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 19] total 62 [2024-11-14 05:51:13,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855894481] [2024-11-14 05:51:13,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:51:13,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-14 05:51:13,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:51:13,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-14 05:51:13,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=5767, Unknown=46, NotChecked=310, Total=6480 [2024-11-14 05:51:13,541 INFO L87 Difference]: Start difference. First operand 226 states and 255 transitions. Second operand has 63 states, 63 states have (on average 1.7619047619047619) internal successors, (111), 62 states have internal predecessors, (111), 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 05:51:31,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:51:33,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:51:35,437 WARN L539 Checker$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 05:51:44,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:51:46,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:51:46,326 INFO L93 Difference]: Finished difference Result 313 states and 342 transitions. [2024-11-14 05:51:46,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-11-14 05:51:46,327 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.7619047619047619) internal successors, (111), 62 states have internal predecessors, (111), 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 39 [2024-11-14 05:51:46,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:51:46,328 INFO L225 Difference]: With dead ends: 313 [2024-11-14 05:51:46,328 INFO L226 Difference]: Without dead ends: 289 [2024-11-14 05:51:46,329 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 2 IntricatePredicates, 2 DeprecatedPredicates, 2631 ImplicationChecksByTransitivity, 72.0s TimeCoverageRelationStatistics Valid=918, Invalid=13319, Unknown=51, NotChecked=474, Total=14762 [2024-11-14 05:51:46,330 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 57 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1731 mSolverCounterSat, 12 mSolverCounterUnsat, 24 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 2055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1731 IncrementalHoareTripleChecker+Invalid, 24 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2024-11-14 05:51:46,330 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 658 Invalid, 2055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1731 Invalid, 24 Unknown, 288 Unchecked, 14.9s Time] [2024-11-14 05:51:46,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-11-14 05:51:46,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 198. [2024-11-14 05:51:46,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 194 states have (on average 1.1701030927835052) internal successors, (227), 197 states have internal predecessors, (227), 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 05:51:46,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 227 transitions. [2024-11-14 05:51:46,335 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 227 transitions. Word has length 39 [2024-11-14 05:51:46,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:51:46,335 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 227 transitions. [2024-11-14 05:51:46,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.7619047619047619) internal successors, (111), 62 states have internal predecessors, (111), 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 05:51:46,336 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 227 transitions. [2024-11-14 05:51:46,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-14 05:51:46,336 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:51:46,336 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:51:46,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-14 05:51:46,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:51:46,537 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:51:46,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:51:46,537 INFO L85 PathProgramCache]: Analyzing trace with hash -2108148905, now seen corresponding path program 6 times [2024-11-14 05:51:46,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:51:46,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861649366] [2024-11-14 05:51:46,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:51:46,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:51:46,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:51:47,115 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:51:47,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:51:47,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861649366] [2024-11-14 05:51:47,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861649366] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:51:47,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850730398] [2024-11-14 05:51:47,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:51:47,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:51:47,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:51:47,117 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:51:47,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-14 05:51:47,278 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:51:47,278 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:51:47,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-14 05:51:47,282 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:51:47,287 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 05:51:47,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 9 [2024-11-14 05:51:47,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:51:47,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:51:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:51:47,628 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:51:47,651 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1146 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1146) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:51:47,667 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1146 (Array Int Int)) (v_ArrVal_1145 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1145) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1146) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:51:47,735 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:51:47,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 05:51:47,742 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:51:47,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:51:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2024-11-14 05:51:47,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850730398] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:51:47,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1790618901] [2024-11-14 05:51:47,864 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 05:51:47,864 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:51:47,865 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:51:47,865 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:51:47,865 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:51:49,394 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:52:18,100 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13304#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_208| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_206| Int)) (and (or (< |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_208| 0) (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_206|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_208| 1))) (or (and (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_208|) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_206| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_208| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (and (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_162| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_172| Int) (|v_#memory_int_454| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~siz#1_48| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_159| Int) (|v_ULTIMATE.start_cstrlcpy_~n~0#1_175| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_206|) 1) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_208|) (<= 1 (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_159| |v_ULTIMATE.start_cstrlcpy_~siz#1_48|)) (= (store |v_#memory_int_454| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_172| (store (select |v_#memory_int_454| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_172|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_159| 0)) |#memory_int|) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_159| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_172|)) (exists ((|v_#memory_int_449| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length~0#1_151| Int)) (and (= (store (store |v_#memory_int_449| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_172| (store (select |v_#memory_int_449| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_172|) (+ (- 1) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_159| |v_ULTIMATE.start_cstrlcpy_~siz#1_48|) 0)) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_206| (store (select (store |v_#memory_int_449| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_172| (store (select |v_#memory_int_449| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_172|) (+ (- 1) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_159| |v_ULTIMATE.start_cstrlcpy_~siz#1_48|) 0)) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_206|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_151|) 0)) |v_#memory_int_454|) (<= (+ |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_151|) (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_206|)) (<= 1 (+ |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_151|)))) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_172|) 1) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_159|) (= |v_ULTIMATE.start_cstrlcpy_~siz#1_48| (+ 1 |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_162|)) (= (+ |v_ULTIMATE.start_cstrlcpy_~n~0#1_175| 1) |v_ULTIMATE.start_cstrlcpy_~siz#1_48|) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_159| |v_ULTIMATE.start_cstrlcpy_~siz#1_48|) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_172|)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_162| 4294967296) 0))) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_206| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_208| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|)))))' at error location [2024-11-14 05:52:18,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:52:18,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:52:18,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 33 [2024-11-14 05:52:18,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696398657] [2024-11-14 05:52:18,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:52:18,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-14 05:52:18,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:52:18,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-14 05:52:18,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2282, Unknown=32, NotChecked=194, Total=2652 [2024-11-14 05:52:18,102 INFO L87 Difference]: Start difference. First operand 198 states and 227 transitions. Second operand has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 33 states have internal predecessors, (77), 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 05:52:18,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:52:18,951 INFO L93 Difference]: Finished difference Result 233 states and 261 transitions. [2024-11-14 05:52:18,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-14 05:52:18,952 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 33 states have internal predecessors, (77), 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 40 [2024-11-14 05:52:18,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:52:18,953 INFO L225 Difference]: With dead ends: 233 [2024-11-14 05:52:18,953 INFO L226 Difference]: Without dead ends: 208 [2024-11-14 05:52:18,953 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=176, Invalid=2770, Unknown=32, NotChecked=214, Total=3192 [2024-11-14 05:52:18,953 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:52:18,954 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 415 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 607 Invalid, 0 Unknown, 106 Unchecked, 0.5s Time] [2024-11-14 05:52:18,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2024-11-14 05:52:18,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 195. [2024-11-14 05:52:18,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 191 states have (on average 1.162303664921466) internal successors, (222), 194 states have internal predecessors, (222), 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 05:52:18,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 222 transitions. [2024-11-14 05:52:18,959 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 222 transitions. Word has length 40 [2024-11-14 05:52:18,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:52:18,959 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 222 transitions. [2024-11-14 05:52:18,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 33 states have internal predecessors, (77), 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 05:52:18,959 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 222 transitions. [2024-11-14 05:52:18,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-14 05:52:18,960 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:52:18,960 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:52:18,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-14 05:52:19,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:52:19,161 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:52:19,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:52:19,161 INFO L85 PathProgramCache]: Analyzing trace with hash -362045971, now seen corresponding path program 6 times [2024-11-14 05:52:19,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:52:19,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920935058] [2024-11-14 05:52:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:52:19,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:52:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 05:52:19,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:52:19,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920935058] [2024-11-14 05:52:19,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920935058] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:52:19,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742371321] [2024-11-14 05:52:19,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:52:19,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:52:19,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:52:19,476 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:52:19,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-14 05:52:19,749 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:52:19,749 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:52:19,752 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-11-14 05:52:19,754 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:19,768 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 05:52:20,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-14 05:52:20,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 05:52:20,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 05:52:20,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 05:52:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:52:20,861 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:20,961 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1207 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1207) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2024-11-14 05:52:20,971 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1207 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1207) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2024-11-14 05:52:20,984 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1207 (Array Int Int)) (v_ArrVal_1206 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1206) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1207) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2024-11-14 05:52:21,321 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:52:21,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 05:52:21,330 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:52:21,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:52:21,335 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 3 [2024-11-14 05:52:21,858 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 19 not checked. [2024-11-14 05:52:21,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742371321] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:52:21,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [246781942] [2024-11-14 05:52:21,859 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:52:21,859 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:52:21,859 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:52:21,860 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:52:21,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:52:22,633 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:52:25,073 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14051#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_171| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_170| Int)) (and (or (and (= (select |#valid| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) 1) (<= 1 (+ |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|)) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_170|) 1) (not (= (mod |ULTIMATE.start_cstrlcpy_~siz#1| 4294967296) 0)) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_171|) (= |ULTIMATE.start_cstrlcpy_~siz#1| (+ |ULTIMATE.start_cstrlcpy_~n~0#1| 1)) (exists ((|v_ULTIMATE.start_main_~length~0#1_155| Int) (|v_#memory_int_477| (Array Int (Array Int Int)))) (and (<= 1 (+ |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_155|)) (= |#memory_int| (store (store |v_#memory_int_477| |ULTIMATE.start_cstrlcpy_#t~post3#1.base| (store (select |v_#memory_int_477| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) 0)) |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_170| (store (select (store |v_#memory_int_477| |ULTIMATE.start_cstrlcpy_#t~post3#1.base| (store (select |v_#memory_int_477| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) 0)) |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_170|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_155|) 0))) (<= (+ |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_155|) (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_170|)))) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (= |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_170| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= (+ |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (select |#length| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|)) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_171| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (not (= (mod (+ |ULTIMATE.start_cstrlcpy_~siz#1| 4294967295) 4294967296) 0))) (and (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_173| Int)) (and (or (and (= (select |#valid| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) 1) (<= 1 (+ |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|)) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_170|) 1) (= |ULTIMATE.start_cstrlcpy_~siz#1| (+ 1 |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_173|)) (not (= (mod (+ 1 |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_173|) 4294967296) 0)) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_171|) (exists ((|v_ULTIMATE.start_main_~length~0#1_155| Int) (|v_#memory_int_477| (Array Int (Array Int Int)))) (and (<= 1 (+ |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_155|)) (= |#memory_int| (store (store |v_#memory_int_477| |ULTIMATE.start_cstrlcpy_#t~post3#1.base| (store (select |v_#memory_int_477| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) 0)) |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_170| (store (select (store |v_#memory_int_477| |ULTIMATE.start_cstrlcpy_#t~post3#1.base| (store (select |v_#memory_int_477| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) 0)) |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_170|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_155|) 0))) (<= (+ |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_155|) (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_170|)))) (<= (+ |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (select |#length| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|)) (= |ULTIMATE.start_cstrlcpy_~n~0#1| |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_173|)) (and (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_164| Int) (|v_#memory_int_481| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_176| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_176|) 1) (<= (+ |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_164| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_176|)) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_171|) (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_164|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_176|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_164|) 0)) (= |#memory_int| (store |v_#memory_int_481| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_176| (store (select |v_#memory_int_481| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_176|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_164| (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_176|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_164|)))))) (= |ULTIMATE.start_cstrlcpy_~n~0#1| |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_173|))) (not (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_173| 4294967296) 0)))) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (= |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_170| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_171| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|))) (or (< |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_171| 0) (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_170|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_171| 1)))))' at error location [2024-11-14 05:52:25,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:52:25,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:52:25,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 18] total 49 [2024-11-14 05:52:25,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404816900] [2024-11-14 05:52:25,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:52:25,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 05:52:25,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:52:25,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 05:52:25,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=3069, Unknown=47, NotChecked=342, Total=3660 [2024-11-14 05:52:25,074 INFO L87 Difference]: Start difference. First operand 195 states and 222 transitions. Second operand has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 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 05:52:26,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:52:26,971 INFO L93 Difference]: Finished difference Result 272 states and 302 transitions. [2024-11-14 05:52:26,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-14 05:52:26,972 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 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 41 [2024-11-14 05:52:26,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:52:26,973 INFO L225 Difference]: With dead ends: 272 [2024-11-14 05:52:26,973 INFO L226 Difference]: Without dead ends: 265 [2024-11-14 05:52:26,974 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=308, Invalid=5357, Unknown=47, NotChecked=450, Total=6162 [2024-11-14 05:52:26,974 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 21 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 1720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 355 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:52:26,974 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 655 Invalid, 1720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1352 Invalid, 0 Unknown, 355 Unchecked, 0.8s Time] [2024-11-14 05:52:26,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-11-14 05:52:26,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 234. [2024-11-14 05:52:26,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 230 states have (on average 1.1434782608695653) internal successors, (263), 233 states have internal predecessors, (263), 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 05:52:26,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 263 transitions. [2024-11-14 05:52:26,982 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 263 transitions. Word has length 41 [2024-11-14 05:52:26,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:52:26,982 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 263 transitions. [2024-11-14 05:52:26,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 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 05:52:26,983 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 263 transitions. [2024-11-14 05:52:26,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-14 05:52:26,983 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:52:26,983 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:52:27,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-14 05:52:27,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-14 05:52:27,184 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:52:27,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:52:27,184 INFO L85 PathProgramCache]: Analyzing trace with hash -2011609300, now seen corresponding path program 9 times [2024-11-14 05:52:27,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:52:27,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802336597] [2024-11-14 05:52:27,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:52:27,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:52:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:52:27,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:52:27,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802336597] [2024-11-14 05:52:27,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802336597] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:52:27,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510589822] [2024-11-14 05:52:27,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:52:27,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:52:27,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:52:27,904 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:52:27,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-14 05:52:28,097 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:52:28,097 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:52:28,100 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-14 05:52:28,102 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:28,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:52:28,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-14 05:52:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:52:29,203 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:29,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-14 05:52:29,617 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:52:29,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2024-11-14 05:52:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 15 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:52:30,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510589822] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:52:30,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1063304921] [2024-11-14 05:52:30,123 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-14 05:52:30,123 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:52:30,123 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:52:30,123 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:52:30,123 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:52:30,572 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:52:33,047 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14898#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_228| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_230| Int)) (and (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_230| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_228|) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_230|) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_228| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_230|)))' at error location [2024-11-14 05:52:33,047 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:52:33,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:52:33,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 19] total 48 [2024-11-14 05:52:33,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431003751] [2024-11-14 05:52:33,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:52:33,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 05:52:33,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:52:33,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 05:52:33,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3701, Unknown=13, NotChecked=0, Total=3906 [2024-11-14 05:52:33,049 INFO L87 Difference]: Start difference. First operand 234 states and 263 transitions. Second operand has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 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 05:52:34,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:52:34,115 INFO L93 Difference]: Finished difference Result 300 states and 336 transitions. [2024-11-14 05:52:34,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-14 05:52:34,115 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 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 41 [2024-11-14 05:52:34,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:52:34,116 INFO L225 Difference]: With dead ends: 300 [2024-11-14 05:52:34,116 INFO L226 Difference]: Without dead ends: 274 [2024-11-14 05:52:34,117 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=270, Invalid=5267, Unknown=13, NotChecked=0, Total=5550 [2024-11-14 05:52:34,117 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:52:34,117 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 447 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:52:34,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2024-11-14 05:52:34,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 250. [2024-11-14 05:52:34,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 246 states have (on average 1.1544715447154472) internal successors, (284), 249 states have internal predecessors, (284), 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 05:52:34,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 284 transitions. [2024-11-14 05:52:34,123 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 284 transitions. Word has length 41 [2024-11-14 05:52:34,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:52:34,123 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 284 transitions. [2024-11-14 05:52:34,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 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 05:52:34,123 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 284 transitions. [2024-11-14 05:52:34,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-14 05:52:34,124 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:52:34,124 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:52:34,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-14 05:52:34,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-14 05:52:34,324 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:52:34,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:52:34,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1870155734, now seen corresponding path program 7 times [2024-11-14 05:52:34,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:52:34,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341347399] [2024-11-14 05:52:34,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:52:34,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:52:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:52:35,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:52:35,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341347399] [2024-11-14 05:52:35,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341347399] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:52:35,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36254071] [2024-11-14 05:52:35,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:52:35,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:52:35,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:52:35,669 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:52:35,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-14 05:52:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:35,826 INFO L255 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-14 05:52:35,828 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:35,833 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 05:52:36,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 9 [2024-11-14 05:52:36,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:52:36,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:52:36,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 05:52:36,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 05:52:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 05:52:36,392 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:36,497 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1311 (Array Int Int)) (v_ArrVal_1310 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1310) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1311) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2024-11-14 05:52:36,846 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1311 (Array Int Int)) (v_ArrVal_1308 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1308) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1311) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:52:36,858 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1311 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1311) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:52:36,871 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:52:36,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 05:52:36,878 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:52:36,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:52:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 12 not checked. [2024-11-14 05:52:37,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36254071] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:52:37,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [996153781] [2024-11-14 05:52:37,068 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 05:52:37,068 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:52:37,068 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:52:37,068 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:52:37,068 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:52:37,683 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:52:39,719 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15783#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_238| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_236| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_236|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_238| 1)) (< |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_238| 0)) (or (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_236|) (+ (- 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_238|)) 0)) (exists ((|v_#memory_int_527| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_185| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_201| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_201|) 1) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_185|) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_185| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_201|)) (= |#memory_int| (store |v_#memory_int_527| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_201| (store (select |v_#memory_int_527| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_201|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_185| 0))))) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_200| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_200| 4294967296) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_186| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_186| 4294967296) 0)) (<= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_238| (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_236|)) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_236|) 1) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_53| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_53| 4294967296) 0))) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_236| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_238|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_238| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (and (exists ((|v_#memory_int_527| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_185| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_201| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_201|) 1) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_185|) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_185| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_201|)) (= |#memory_int| (store |v_#memory_int_527| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_201| (store (select |v_#memory_int_527| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_201|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_185| 0))))) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_200| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_200| 4294967296) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_186| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_186| 4294967296) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_53| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_53| 4294967296) 0))) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_236| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_238| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|)))))' at error location [2024-11-14 05:52:39,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:52:39,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:52:39,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17, 17] total 44 [2024-11-14 05:52:39,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385509731] [2024-11-14 05:52:39,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:52:39,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-14 05:52:39,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:52:39,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-14 05:52:39,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2740, Unknown=66, NotChecked=324, Total=3306 [2024-11-14 05:52:39,721 INFO L87 Difference]: Start difference. First operand 250 states and 284 transitions. Second operand has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 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 05:52:47,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:52:47,678 INFO L93 Difference]: Finished difference Result 252 states and 284 transitions. [2024-11-14 05:52:47,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-14 05:52:47,679 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 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 43 [2024-11-14 05:52:47,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:52:47,680 INFO L225 Difference]: With dead ends: 252 [2024-11-14 05:52:47,680 INFO L226 Difference]: Without dead ends: 226 [2024-11-14 05:52:47,680 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=289, Invalid=4620, Unknown=73, NotChecked=420, Total=5402 [2024-11-14 05:52:47,680 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:52:47,681 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 707 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 942 Invalid, 0 Unknown, 194 Unchecked, 0.7s Time] [2024-11-14 05:52:47,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-11-14 05:52:47,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 207. [2024-11-14 05:52:47,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 203 states have (on average 1.1724137931034482) internal successors, (238), 206 states have internal predecessors, (238), 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 05:52:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 238 transitions. [2024-11-14 05:52:47,684 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 238 transitions. Word has length 43 [2024-11-14 05:52:47,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:52:47,685 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 238 transitions. [2024-11-14 05:52:47,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 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 05:52:47,685 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 238 transitions. [2024-11-14 05:52:47,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-14 05:52:47,685 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:52:47,686 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:52:47,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-14 05:52:47,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-14 05:52:47,886 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:52:47,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:52:47,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1259614130, now seen corresponding path program 10 times [2024-11-14 05:52:47,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:52:47,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279823299] [2024-11-14 05:52:47,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:52:47,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:52:47,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 25 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:52:48,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:52:48,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279823299] [2024-11-14 05:52:48,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279823299] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:52:48,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875651377] [2024-11-14 05:52:48,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:52:48,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:52:48,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:52:48,433 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:52:48,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-14 05:52:48,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:48,606 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-14 05:52:48,607 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:48,612 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 05:52:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 25 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:52:48,894 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 25 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:52:49,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875651377] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:52:49,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1343398469] [2024-11-14 05:52:49,615 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-14 05:52:49,615 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:52:49,615 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:52:49,615 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:52:49,615 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:52:50,366 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:52:52,780 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16290#true' at error location [2024-11-14 05:52:52,780 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:52:52,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:52:52,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 41 [2024-11-14 05:52:52,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251875577] [2024-11-14 05:52:52,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:52:52,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-14 05:52:52,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:52:52,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-14 05:52:52,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2685, Unknown=12, NotChecked=0, Total=2970 [2024-11-14 05:52:52,782 INFO L87 Difference]: Start difference. First operand 207 states and 238 transitions. Second operand has 43 states, 42 states have (on average 2.642857142857143) internal successors, (111), 42 states have internal predecessors, (111), 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 05:52:53,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:52:53,872 INFO L93 Difference]: Finished difference Result 324 states and 361 transitions. [2024-11-14 05:52:53,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-14 05:52:53,872 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.642857142857143) internal successors, (111), 42 states have internal predecessors, (111), 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 43 [2024-11-14 05:52:53,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:52:53,874 INFO L225 Difference]: With dead ends: 324 [2024-11-14 05:52:53,874 INFO L226 Difference]: Without dead ends: 324 [2024-11-14 05:52:53,874 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=344, Invalid=3426, Unknown=12, NotChecked=0, Total=3782 [2024-11-14 05:52:53,874 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 143 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:52:53,875 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 750 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1349 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 05:52:53,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2024-11-14 05:52:53,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 264. [2024-11-14 05:52:53,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 260 states have (on average 1.1615384615384616) internal successors, (302), 263 states have internal predecessors, (302), 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 05:52:53,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 302 transitions. [2024-11-14 05:52:53,880 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 302 transitions. Word has length 43 [2024-11-14 05:52:53,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:52:53,880 INFO L471 AbstractCegarLoop]: Abstraction has 264 states and 302 transitions. [2024-11-14 05:52:53,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.642857142857143) internal successors, (111), 42 states have internal predecessors, (111), 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 05:52:53,881 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 302 transitions. [2024-11-14 05:52:53,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 05:52:53,881 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:52:53,881 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:52:53,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-14 05:52:54,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2024-11-14 05:52:54,082 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:52:54,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:52:54,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1008223937, now seen corresponding path program 7 times [2024-11-14 05:52:54,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:52:54,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801700994] [2024-11-14 05:52:54,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:52:54,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:52:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 9 proven. 49 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 05:52:54,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:52:54,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801700994] [2024-11-14 05:52:54,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801700994] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:52:54,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753908182] [2024-11-14 05:52:54,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:52:54,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:52:54,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:52:54,547 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:52:54,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-14 05:52:54,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:54,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-14 05:52:54,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:54,717 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 05:52:54,918 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 9 proven. 49 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 05:52:54,919 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:52:55,361 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 9 proven. 49 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 05:52:55,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753908182] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:52:55,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [87234328] [2024-11-14 05:52:55,361 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:52:55,361 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:52:55,362 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:52:55,362 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:52:55,362 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:52:55,869 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:52:56,614 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17496#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_200| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_198| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_198|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_200| 1)) (< |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_200| 0)) (or (and (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_198|) 1) (= (select |#valid| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) 1) (<= 1 (+ |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|)) (not (= (mod |ULTIMATE.start_cstrlcpy_~n~0#1| 4294967296) 0)) (not (= 0 (mod (+ |ULTIMATE.start_cstrlcpy_~n~0#1| 1) 4294967296))) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_200| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (exists ((|v_#memory_int_563| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length~0#1_171| Int)) (and (= |#memory_int| (store (store |v_#memory_int_563| |ULTIMATE.start_cstrlcpy_#t~post3#1.base| (store (select |v_#memory_int_563| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) 0)) |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_198| (store (select (store |v_#memory_int_563| |ULTIMATE.start_cstrlcpy_#t~post3#1.base| (store (select |v_#memory_int_563| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) 0)) |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_198|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_171|) 0))) (<= 1 (+ |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_171|)) (<= (+ |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_171|) (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_198|)))) (= |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_198| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= |ULTIMATE.start_cstrlcpy_~siz#1| (+ |ULTIMATE.start_cstrlcpy_~n~0#1| 1)) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_200|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= (+ |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (select |#length| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|))) (and (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_200| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_198| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_201| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_201| 4294967296) 0)))))))' at error location [2024-11-14 05:52:56,614 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:52:56,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:52:56,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2024-11-14 05:52:56,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852144923] [2024-11-14 05:52:56,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:52:56,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-14 05:52:56,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:52:56,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-14 05:52:56,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1635, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 05:52:56,616 INFO L87 Difference]: Start difference. First operand 264 states and 302 transitions. Second operand has 33 states, 32 states have (on average 3.03125) internal successors, (97), 32 states have internal predecessors, (97), 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 05:52:57,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:52:57,207 INFO L93 Difference]: Finished difference Result 337 states and 377 transitions. [2024-11-14 05:52:57,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 05:52:57,208 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.03125) internal successors, (97), 32 states have internal predecessors, (97), 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 45 [2024-11-14 05:52:57,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:52:57,209 INFO L225 Difference]: With dead ends: 337 [2024-11-14 05:52:57,209 INFO L226 Difference]: Without dead ends: 337 [2024-11-14 05:52:57,209 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=217, Invalid=2039, Unknown=0, NotChecked=0, Total=2256 [2024-11-14 05:52:57,210 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 79 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:52:57,210 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 456 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:52:57,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2024-11-14 05:52:57,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 272. [2024-11-14 05:52:57,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 268 states have (on average 1.1604477611940298) internal successors, (311), 271 states have internal predecessors, (311), 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 05:52:57,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 311 transitions. [2024-11-14 05:52:57,215 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 311 transitions. Word has length 45 [2024-11-14 05:52:57,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:52:57,216 INFO L471 AbstractCegarLoop]: Abstraction has 272 states and 311 transitions. [2024-11-14 05:52:57,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.03125) internal successors, (97), 32 states have internal predecessors, (97), 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 05:52:57,216 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 311 transitions. [2024-11-14 05:52:57,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 05:52:57,217 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:52:57,217 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:52:57,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-14 05:52:57,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2024-11-14 05:52:57,417 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:52:57,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:52:57,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1172441534, now seen corresponding path program 8 times [2024-11-14 05:52:57,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:52:57,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423324011] [2024-11-14 05:52:57,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:52:57,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:52:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:52:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:52:58,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:52:58,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423324011] [2024-11-14 05:52:58,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423324011] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:52:58,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76054952] [2024-11-14 05:52:58,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:52:58,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:52:58,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:52:58,128 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:52:58,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-14 05:52:58,412 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 05:52:58,412 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:52:58,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-11-14 05:52:58,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:52:58,423 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 05:52:58,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 9 [2024-11-14 05:52:58,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:52:58,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:52:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:52:58,913 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:01,071 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1475 (Array Int Int)) (v_ArrVal_1474 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1474) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1475) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:53:01,172 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:53:01,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 05:53:01,181 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:53:01,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:53:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:53:01,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76054952] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:53:01,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [505827427] [2024-11-14 05:53:01,358 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 05:53:01,358 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:53:01,358 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:53:01,358 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:53:01,358 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:53:03,247 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:53:10,503 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18426#(and (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_275| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_272| Int)) (and (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_272| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_275| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_272|) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_275|) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_275|))))' at error location [2024-11-14 05:53:10,503 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:53:10,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:53:10,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 36 [2024-11-14 05:53:10,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28634287] [2024-11-14 05:53:10,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:53:10,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-14 05:53:10,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:53:10,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-14 05:53:10,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2767, Unknown=36, NotChecked=106, Total=3080 [2024-11-14 05:53:10,505 INFO L87 Difference]: Start difference. First operand 272 states and 311 transitions. Second operand has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 36 states have internal predecessors, (84), 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 05:53:11,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:53:11,466 INFO L93 Difference]: Finished difference Result 322 states and 360 transitions. [2024-11-14 05:53:11,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-14 05:53:11,467 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 36 states have internal predecessors, (84), 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 45 [2024-11-14 05:53:11,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:53:11,468 INFO L225 Difference]: With dead ends: 322 [2024-11-14 05:53:11,468 INFO L226 Difference]: Without dead ends: 294 [2024-11-14 05:53:11,468 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=209, Invalid=3419, Unknown=36, NotChecked=118, Total=3782 [2024-11-14 05:53:11,469 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 3 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:53:11,469 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 583 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 884 Invalid, 0 Unknown, 62 Unchecked, 0.5s Time] [2024-11-14 05:53:11,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2024-11-14 05:53:11,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 269. [2024-11-14 05:53:11,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 265 states have (on average 1.1547169811320754) internal successors, (306), 268 states have internal predecessors, (306), 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 05:53:11,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 306 transitions. [2024-11-14 05:53:11,474 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 306 transitions. Word has length 45 [2024-11-14 05:53:11,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:53:11,475 INFO L471 AbstractCegarLoop]: Abstraction has 269 states and 306 transitions. [2024-11-14 05:53:11,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 36 states have internal predecessors, (84), 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 05:53:11,475 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 306 transitions. [2024-11-14 05:53:11,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 05:53:11,476 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:53:11,476 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:53:11,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-14 05:53:11,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-11-14 05:53:11,676 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:53:11,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:53:11,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1190170965, now seen corresponding path program 4 times [2024-11-14 05:53:11,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:53:11,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185884678] [2024-11-14 05:53:11,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:11,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:53:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:12,070 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 4 proven. 58 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 05:53:12,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:53:12,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185884678] [2024-11-14 05:53:12,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185884678] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:53:12,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008973755] [2024-11-14 05:53:12,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:53:12,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:53:12,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:53:12,072 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:53:12,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-14 05:53:12,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:12,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-14 05:53:12,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 05:53:12,474 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:12,771 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 5 treesize of output 3 [2024-11-14 05:53:12,850 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 05:53:12,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008973755] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:53:12,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1187307708] [2024-11-14 05:53:12,851 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:53:12,851 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:53:12,852 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:53:12,852 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:53:12,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:53:13,689 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:53:14,363 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19351#(and (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|))' at error location [2024-11-14 05:53:14,364 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:53:14,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:53:14,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2024-11-14 05:53:14,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594330928] [2024-11-14 05:53:14,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:53:14,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-14 05:53:14,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:53:14,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-14 05:53:14,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1566, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 05:53:14,365 INFO L87 Difference]: Start difference. First operand 269 states and 306 transitions. Second operand has 32 states, 31 states have (on average 2.806451612903226) internal successors, (87), 32 states have internal predecessors, (87), 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 05:53:14,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:53:14,993 INFO L93 Difference]: Finished difference Result 310 states and 345 transitions. [2024-11-14 05:53:14,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 05:53:14,993 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.806451612903226) internal successors, (87), 32 states have internal predecessors, (87), 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 46 [2024-11-14 05:53:14,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:53:14,994 INFO L225 Difference]: With dead ends: 310 [2024-11-14 05:53:14,994 INFO L226 Difference]: Without dead ends: 310 [2024-11-14 05:53:14,994 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=205, Invalid=2051, Unknown=0, NotChecked=0, Total=2256 [2024-11-14 05:53:14,995 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 62 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:53:14,995 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 559 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:53:14,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2024-11-14 05:53:14,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 274. [2024-11-14 05:53:14,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 270 states have (on average 1.1444444444444444) internal successors, (309), 273 states have internal predecessors, (309), 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 05:53:14,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 309 transitions. [2024-11-14 05:53:15,000 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 309 transitions. Word has length 46 [2024-11-14 05:53:15,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:53:15,000 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 309 transitions. [2024-11-14 05:53:15,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.806451612903226) internal successors, (87), 32 states have internal predecessors, (87), 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 05:53:15,000 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 309 transitions. [2024-11-14 05:53:15,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 05:53:15,001 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:53:15,001 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:53:15,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-14 05:53:15,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-11-14 05:53:15,201 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:53:15,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:53:15,202 INFO L85 PathProgramCache]: Analyzing trace with hash 35327101, now seen corresponding path program 11 times [2024-11-14 05:53:15,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:53:15,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756425658] [2024-11-14 05:53:15,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:15,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:53:15,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:15,927 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 14 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:53:15,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:53:15,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756425658] [2024-11-14 05:53:15,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756425658] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:53:15,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633412787] [2024-11-14 05:53:15,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:53:15,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:53:15,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:53:15,929 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:53:15,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-14 05:53:16,161 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-14 05:53:16,161 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:53:16,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-14 05:53:16,165 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:16,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 05:53:16,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:53:16,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-14 05:53:17,416 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 14 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:53:17,417 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:17,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 05:53:17,666 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 16 treesize of output 12 [2024-11-14 05:53:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 14 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:53:18,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633412787] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:53:18,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [825259697] [2024-11-14 05:53:18,143 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-14 05:53:18,143 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:53:18,143 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:53:18,143 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:53:18,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:53:18,624 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:53:21,795 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20277#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_295| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_298| Int)) (and (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_298|) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_295|) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_298|) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_295| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_298| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|)))' at error location [2024-11-14 05:53:21,795 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:53:21,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:53:21,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 19] total 49 [2024-11-14 05:53:21,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837935186] [2024-11-14 05:53:21,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:53:21,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-14 05:53:21,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:53:21,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-14 05:53:21,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=3842, Unknown=0, NotChecked=0, Total=4032 [2024-11-14 05:53:21,797 INFO L87 Difference]: Start difference. First operand 274 states and 309 transitions. Second operand has 50 states, 50 states have (on average 2.28) internal successors, (114), 49 states have internal predecessors, (114), 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 05:53:23,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:53:23,835 INFO L93 Difference]: Finished difference Result 343 states and 385 transitions. [2024-11-14 05:53:23,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-14 05:53:23,836 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.28) internal successors, (114), 49 states have internal predecessors, (114), 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 46 [2024-11-14 05:53:23,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:53:23,836 INFO L225 Difference]: With dead ends: 343 [2024-11-14 05:53:23,837 INFO L226 Difference]: Without dead ends: 314 [2024-11-14 05:53:23,837 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=296, Invalid=6184, Unknown=0, NotChecked=0, Total=6480 [2024-11-14 05:53:23,838 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:53:23,838 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 683 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1392 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 05:53:23,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2024-11-14 05:53:23,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 290. [2024-11-14 05:53:23,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 286 states have (on average 1.1538461538461537) internal successors, (330), 289 states have internal predecessors, (330), 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 05:53:23,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 330 transitions. [2024-11-14 05:53:23,844 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 330 transitions. Word has length 46 [2024-11-14 05:53:23,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:53:23,844 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 330 transitions. [2024-11-14 05:53:23,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.28) internal successors, (114), 49 states have internal predecessors, (114), 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 05:53:23,845 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 330 transitions. [2024-11-14 05:53:23,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 05:53:23,846 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:53:23,846 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:53:23,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-14 05:53:24,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:53:24,046 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:53:24,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:53:24,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1478092610, now seen corresponding path program 9 times [2024-11-14 05:53:24,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:53:24,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650258202] [2024-11-14 05:53:24,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:24,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:53:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:53:25,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:53:25,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650258202] [2024-11-14 05:53:25,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650258202] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:53:25,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170722888] [2024-11-14 05:53:25,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:53:25,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:53:25,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:53:25,143 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:53:25,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-14 05:53:25,419 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:53:25,419 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:53:25,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-14 05:53:25,425 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:25,430 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 05:53:25,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 9 [2024-11-14 05:53:25,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:53:26,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:53:26,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:53:26,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-14 05:53:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:53:26,421 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:26,980 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1642 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1642) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:53:26,995 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:53:26,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 05:53:27,006 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:53:27,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:53:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 4 not checked. [2024-11-14 05:53:27,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170722888] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:53:27,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [127853842] [2024-11-14 05:53:27,186 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 05:53:27,186 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:53:27,186 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:53:27,187 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:53:27,187 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:53:28,148 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:53:30,507 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21278#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_312| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_309| Int)) (and (or (and (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_309| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (exists ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_233| Int) (|v_#memory_int_661| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_254| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_254|) 1) (= |#memory_int| (store |v_#memory_int_661| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_254| (store (select |v_#memory_int_661| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_254|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_233| 0))) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_233| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_254|)) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_233|))) (= |ULTIMATE.start_cstrlcpy_~s~0#1.offset| (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_312| 1)) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_63| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_63| 4294967296) 0))) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_233| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_233| 4294967296) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_249| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_249| 4294967296) 0)) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_312|) (<= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_312| (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_309|)) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_309|) (+ (- 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_312|)) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_309|) 1)) (and (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_309| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (exists ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_233| Int) (|v_#memory_int_661| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_254| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_254|) 1) (= |#memory_int| (store |v_#memory_int_661| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_254| (store (select |v_#memory_int_661| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_254|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_233| 0))) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_233| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_254|)) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_233|))) (= |ULTIMATE.start_cstrlcpy_~s~0#1.offset| (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_312| 1)) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_63| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_63| 4294967296) 0))) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_233| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_233| 4294967296) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_249| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_249| 4294967296) 0)))) (or (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_309|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_312| 1)) (< |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_312| 0))))' at error location [2024-11-14 05:53:30,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:53:30,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:53:30,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 43 [2024-11-14 05:53:30,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458504769] [2024-11-14 05:53:30,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:53:30,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-14 05:53:30,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:53:30,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-14 05:53:30,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2948, Unknown=97, NotChecked=110, Total=3306 [2024-11-14 05:53:30,509 INFO L87 Difference]: Start difference. First operand 290 states and 330 transitions. Second operand has 44 states, 44 states have (on average 2.522727272727273) internal successors, (111), 43 states have internal predecessors, (111), 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 05:53:37,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:53:37,372 INFO L93 Difference]: Finished difference Result 384 states and 425 transitions. [2024-11-14 05:53:37,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-14 05:53:37,372 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.522727272727273) internal successors, (111), 43 states have internal predecessors, (111), 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 47 [2024-11-14 05:53:37,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:53:37,373 INFO L225 Difference]: With dead ends: 384 [2024-11-14 05:53:37,373 INFO L226 Difference]: Without dead ends: 357 [2024-11-14 05:53:37,374 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=299, Invalid=5594, Unknown=117, NotChecked=152, Total=6162 [2024-11-14 05:53:37,374 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 29 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 1916 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 2047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:53:37,374 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 1328 Invalid, 2047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1916 Invalid, 0 Unknown, 117 Unchecked, 1.4s Time] [2024-11-14 05:53:37,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2024-11-14 05:53:37,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 301. [2024-11-14 05:53:37,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 297 states have (on average 1.1515151515151516) internal successors, (342), 300 states have internal predecessors, (342), 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 05:53:37,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 342 transitions. [2024-11-14 05:53:37,380 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 342 transitions. Word has length 47 [2024-11-14 05:53:37,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:53:37,380 INFO L471 AbstractCegarLoop]: Abstraction has 301 states and 342 transitions. [2024-11-14 05:53:37,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.522727272727273) internal successors, (111), 43 states have internal predecessors, (111), 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 05:53:37,380 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 342 transitions. [2024-11-14 05:53:37,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-14 05:53:37,381 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:53:37,381 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:53:37,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-14 05:53:37,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-11-14 05:53:37,582 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:53:37,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:53:37,582 INFO L85 PathProgramCache]: Analyzing trace with hash -732264521, now seen corresponding path program 12 times [2024-11-14 05:53:37,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:53:37,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551968616] [2024-11-14 05:53:37,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:37,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:53:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 36 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:53:38,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:53:38,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551968616] [2024-11-14 05:53:38,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551968616] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:53:38,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377741492] [2024-11-14 05:53:38,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:53:38,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:53:38,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:53:38,109 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:53:38,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-14 05:53:38,315 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:53:38,315 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:53:38,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-14 05:53:38,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:38,324 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 05:53:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 36 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:53:38,665 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 36 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:53:39,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377741492] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:53:39,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [991269185] [2024-11-14 05:53:39,498 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-14 05:53:39,498 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:53:39,498 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:53:39,498 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:53:39,498 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:53:40,142 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:53:42,302 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22019#true' at error location [2024-11-14 05:53:42,302 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:53:42,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:53:42,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 44 [2024-11-14 05:53:42,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936124729] [2024-11-14 05:53:42,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:53:42,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-14 05:53:42,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:53:42,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-14 05:53:42,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=2963, Unknown=12, NotChecked=0, Total=3306 [2024-11-14 05:53:42,303 INFO L87 Difference]: Start difference. First operand 301 states and 342 transitions. Second operand has 46 states, 45 states have (on average 2.7333333333333334) internal successors, (123), 45 states have internal predecessors, (123), 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 05:53:43,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:53:43,701 INFO L93 Difference]: Finished difference Result 429 states and 477 transitions. [2024-11-14 05:53:43,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-14 05:53:43,702 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.7333333333333334) internal successors, (123), 45 states have internal predecessors, (123), 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 48 [2024-11-14 05:53:43,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:53:43,703 INFO L225 Difference]: With dead ends: 429 [2024-11-14 05:53:43,703 INFO L226 Difference]: Without dead ends: 429 [2024-11-14 05:53:43,704 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=414, Invalid=3864, Unknown=12, NotChecked=0, Total=4290 [2024-11-14 05:53:43,704 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 174 mSDsluCounter, 1142 mSDsCounter, 0 mSdLazyCounter, 1766 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1204 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:53:43,704 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 1204 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1766 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 05:53:43,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2024-11-14 05:53:43,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 363. [2024-11-14 05:53:43,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 359 states have (on average 1.1476323119777159) internal successors, (412), 362 states have internal predecessors, (412), 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 05:53:43,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 412 transitions. [2024-11-14 05:53:43,711 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 412 transitions. Word has length 48 [2024-11-14 05:53:43,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:53:43,711 INFO L471 AbstractCegarLoop]: Abstraction has 363 states and 412 transitions. [2024-11-14 05:53:43,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.7333333333333334) internal successors, (123), 45 states have internal predecessors, (123), 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 05:53:43,711 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 412 transitions. [2024-11-14 05:53:43,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-14 05:53:43,712 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:53:43,712 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:53:43,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-14 05:53:43,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-11-14 05:53:43,913 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:53:43,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:53:43,913 INFO L85 PathProgramCache]: Analyzing trace with hash 496370884, now seen corresponding path program 10 times [2024-11-14 05:53:43,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:53:43,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634298102] [2024-11-14 05:53:43,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:43,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:53:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:53:44,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:53:44,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634298102] [2024-11-14 05:53:44,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634298102] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:53:44,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696367313] [2024-11-14 05:53:44,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:53:44,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:53:44,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:53:44,845 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:53:44,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-14 05:53:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:45,053 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-11-14 05:53:45,055 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:45,060 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 05:53:45,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 9 [2024-11-14 05:53:45,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:53:45,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:53:45,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:53:45,711 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:53:45,711 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:45,741 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1753 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1753) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:53:45,761 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1753 (Array Int Int)) (v_ArrVal_1752 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1752) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1753) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:53:47,870 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1753 (Array Int Int)) (v_ArrVal_1751 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1751) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1753) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:53:47,882 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1753 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1753) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:53:47,893 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:53:47,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 05:53:47,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:53:47,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:53:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 9 not checked. [2024-11-14 05:53:48,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696367313] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:53:48,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1789007890] [2024-11-14 05:53:48,054 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 05:53:48,054 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:53:48,054 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:53:48,054 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:53:48,055 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:53:48,670 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:53:52,756 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23497#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_347| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_344| Int)) (and (or (< |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_347| 0) (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_344|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_347| 1))) (or (and (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_263| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_263| 4294967296) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_67| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_67| 4294967296) 0))) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_246| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_246| 4294967296) 0)) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_344| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_347| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (exists ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_244| Int) (|v_#memory_int_706| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_268| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_268|) 1) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_244| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_268|)) (= |#memory_int| (store |v_#memory_int_706| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_268| (store (select |v_#memory_int_706| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_268|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_244| 0))) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_244|)))) (and (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_263| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_263| 4294967296) 0)) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_347|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_344|) (+ (- 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_347|)) 0)) (<= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_347| (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_344|)) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_67| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_67| 4294967296) 0))) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_246| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_246| 4294967296) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_344|) 1) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_344| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_347| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (exists ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_244| Int) (|v_#memory_int_706| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_268| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_268|) 1) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_244| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_268|)) (= |#memory_int| (store |v_#memory_int_706| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_268| (store (select |v_#memory_int_706| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_268|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_244| 0))) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_244|)))))))' at error location [2024-11-14 05:53:52,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:53:52,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:53:52,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 20] total 41 [2024-11-14 05:53:52,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095291989] [2024-11-14 05:53:52,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:53:52,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-14 05:53:52,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:53:52,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-14 05:53:52,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2395, Unknown=14, NotChecked=404, Total=2970 [2024-11-14 05:53:52,758 INFO L87 Difference]: Start difference. First operand 363 states and 412 transitions. Second operand has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 41 states have internal predecessors, (94), 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 05:53:54,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:53:54,265 INFO L93 Difference]: Finished difference Result 390 states and 438 transitions. [2024-11-14 05:53:54,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-14 05:53:54,266 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 41 states have internal predecessors, (94), 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 49 [2024-11-14 05:53:54,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:53:54,267 INFO L225 Difference]: With dead ends: 390 [2024-11-14 05:53:54,267 INFO L226 Difference]: Without dead ends: 360 [2024-11-14 05:53:54,268 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 112 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=201, Invalid=3107, Unknown=14, NotChecked=460, Total=3782 [2024-11-14 05:53:54,268 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 05:53:54,269 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 712 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1056 Invalid, 0 Unknown, 247 Unchecked, 0.9s Time] [2024-11-14 05:53:54,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2024-11-14 05:53:54,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2024-11-14 05:53:54,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 356 states have (on average 1.1432584269662922) internal successors, (407), 359 states have internal predecessors, (407), 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 05:53:54,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 407 transitions. [2024-11-14 05:53:54,282 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 407 transitions. Word has length 49 [2024-11-14 05:53:54,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:53:54,282 INFO L471 AbstractCegarLoop]: Abstraction has 360 states and 407 transitions. [2024-11-14 05:53:54,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 41 states have internal predecessors, (94), 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 05:53:54,283 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 407 transitions. [2024-11-14 05:53:54,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 05:53:54,283 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:53:54,284 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:53:54,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-14 05:53:54,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:53:54,488 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:53:54,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:53:54,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1323704324, now seen corresponding path program 8 times [2024-11-14 05:53:54,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:53:54,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788328005] [2024-11-14 05:53:54,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:54,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:53:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 26 proven. 54 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 05:53:54,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:53:54,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788328005] [2024-11-14 05:53:54,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788328005] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:53:54,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030586204] [2024-11-14 05:53:54,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:53:54,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:53:54,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:53:54,972 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:53:54,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-14 05:53:55,634 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 05:53:55,635 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:53:55,640 INFO L255 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-11-14 05:53:55,643 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:55,660 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 05:53:56,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-14 05:53:56,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 05:53:56,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 05:53:56,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 05:53:56,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 05:53:56,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-14 05:53:56,987 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 66 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 05:53:56,987 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:53:57,538 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1827 (Array Int Int)) (v_ArrVal_1825 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1825) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1827) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:53:57,550 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1827 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1827) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:53:59,572 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1824 (Array Int Int)) (v_ArrVal_1827 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1824) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1827) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:53:59,698 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:53:59,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 05:53:59,706 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:53:59,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:53:59,714 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 3 [2024-11-14 05:54:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 26 not checked. [2024-11-14 05:54:00,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030586204] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:54:00,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [251641826] [2024-11-14 05:54:00,116 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:54:00,116 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:54:00,116 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:54:00,116 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:54:00,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:54:00,692 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:54:02,024 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24622#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_257| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_259| Int)) (and (or (< |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_259| 0) (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_257|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_259| 1))) (or (and (= (select |#valid| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) 1) (<= 1 (+ |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|)) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_259| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_257|) 1) (not (= (mod |ULTIMATE.start_cstrlcpy_~n~0#1| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~length~0#1_198| Int) (|v_#memory_int_733| (Array Int (Array Int Int)))) (and (= |#memory_int| (store (store |v_#memory_int_733| |ULTIMATE.start_cstrlcpy_#t~post3#1.base| (store (select |v_#memory_int_733| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) 0)) |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_257| (store (select (store |v_#memory_int_733| |ULTIMATE.start_cstrlcpy_#t~post3#1.base| (store (select |v_#memory_int_733| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) 0)) |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_257|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_198|) 0))) (<= 1 (+ |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_198|)) (<= (+ |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_198|) (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_257|)))) (not (= 0 (mod (+ |ULTIMATE.start_cstrlcpy_~n~0#1| 1) 4294967296))) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_259|) (= |ULTIMATE.start_cstrlcpy_~siz#1| (+ |ULTIMATE.start_cstrlcpy_~n~0#1| 1)) (= |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_257| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= (+ |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (select |#length| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|))) (and (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_259| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_259| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_259| 4294967296) 0))) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_257| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|)))))' at error location [2024-11-14 05:54:02,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:54:02,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:54:02,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 50 [2024-11-14 05:54:02,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842643906] [2024-11-14 05:54:02,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:54:02,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-14 05:54:02,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:54:02,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-14 05:54:02,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2967, Unknown=81, NotChecked=336, Total=3540 [2024-11-14 05:54:02,026 INFO L87 Difference]: Start difference. First operand 360 states and 407 transitions. Second operand has 50 states, 50 states have (on average 2.48) internal successors, (124), 50 states have internal predecessors, (124), 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 05:54:07,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:54:07,524 INFO L93 Difference]: Finished difference Result 517 states and 566 transitions. [2024-11-14 05:54:07,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-14 05:54:07,524 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.48) internal successors, (124), 50 states have internal predecessors, (124), 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 50 [2024-11-14 05:54:07,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:54:07,525 INFO L225 Difference]: With dead ends: 517 [2024-11-14 05:54:07,525 INFO L226 Difference]: Without dead ends: 490 [2024-11-14 05:54:07,526 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=313, Invalid=6252, Unknown=89, NotChecked=486, Total=7140 [2024-11-14 05:54:07,526 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 15 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 2924 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 3366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 431 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:54:07,526 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1201 Invalid, 3366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2924 Invalid, 0 Unknown, 431 Unchecked, 2.7s Time] [2024-11-14 05:54:07,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2024-11-14 05:54:07,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 423. [2024-11-14 05:54:07,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 419 states have (on average 1.1241050119331741) internal successors, (471), 422 states have internal predecessors, (471), 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 05:54:07,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 471 transitions. [2024-11-14 05:54:07,531 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 471 transitions. Word has length 50 [2024-11-14 05:54:07,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:54:07,531 INFO L471 AbstractCegarLoop]: Abstraction has 423 states and 471 transitions. [2024-11-14 05:54:07,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.48) internal successors, (124), 50 states have internal predecessors, (124), 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 05:54:07,531 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 471 transitions. [2024-11-14 05:54:07,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 05:54:07,532 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:54:07,532 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:54:07,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-11-14 05:54:07,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-11-14 05:54:07,733 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:54:07,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:54:07,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1684407381, now seen corresponding path program 11 times [2024-11-14 05:54:07,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:54:07,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563898345] [2024-11-14 05:54:07,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:54:07,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:54:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:54:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:54:08,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:54:08,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563898345] [2024-11-14 05:54:08,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563898345] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:54:08,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852218768] [2024-11-14 05:54:08,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:54:08,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:54:08,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:54:08,901 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:54:08,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-14 05:54:09,143 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-14 05:54:09,143 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:54:09,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-11-14 05:54:09,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:54:09,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 05:54:09,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 9 [2024-11-14 05:54:09,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:54:09,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:54:10,036 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:54:10,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:54:10,087 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1883 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1883) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:54:10,703 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1883 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1883) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:54:10,717 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:54:10,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 05:54:10,727 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:54:10,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:54:10,954 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2024-11-14 05:54:10,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852218768] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:54:10,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1210896883] [2024-11-14 05:54:10,956 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 05:54:10,956 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:54:10,956 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:54:10,956 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:54:10,956 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:54:11,476 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:54:15,824 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25959#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_363| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_366| Int)) (and (or (and (<= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_366| (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_363|)) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_284| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_284| 4294967296) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_267| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_267| 4294967296) 0)) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_363| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_363|) 1) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_363|) (+ (- 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_366|)) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_70| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_70| 4294967296) 0))) (exists ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_294| Int) (|v_#memory_int_765| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_268| Int)) (and (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_268|) (= |#memory_int| (store |v_#memory_int_765| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_294| (store (select |v_#memory_int_765| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_294|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_268| 0))) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_294|) 1) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_268| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_294|)))) (= |ULTIMATE.start_cstrlcpy_~s~0#1.offset| (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_366| 1)) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_366|)) (and (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_284| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_284| 4294967296) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_267| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_267| 4294967296) 0)) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_363| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_70| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_70| 4294967296) 0))) (exists ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_294| Int) (|v_#memory_int_765| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_268| Int)) (and (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_268|) (= |#memory_int| (store |v_#memory_int_765| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_294| (store (select |v_#memory_int_765| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_294|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_268| 0))) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_294|) 1) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_268| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_294|)))) (= |ULTIMATE.start_cstrlcpy_~s~0#1.offset| (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_366| 1)))) (or (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_363|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_366| 1)) (< |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_366| 0))))' at error location [2024-11-14 05:54:15,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:54:15,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:54:15,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 39 [2024-11-14 05:54:15,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616967644] [2024-11-14 05:54:15,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:54:15,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-14 05:54:15,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:54:15,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-14 05:54:15,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2385, Unknown=25, NotChecked=198, Total=2756 [2024-11-14 05:54:15,826 INFO L87 Difference]: Start difference. First operand 423 states and 471 transitions. Second operand has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 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 05:54:17,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:54:17,454 INFO L93 Difference]: Finished difference Result 480 states and 527 transitions. [2024-11-14 05:54:17,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-14 05:54:17,454 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 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 50 [2024-11-14 05:54:17,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:54:17,456 INFO L225 Difference]: With dead ends: 480 [2024-11-14 05:54:17,456 INFO L226 Difference]: Without dead ends: 449 [2024-11-14 05:54:17,456 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 117 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=191, Invalid=3097, Unknown=26, NotChecked=226, Total=3540 [2024-11-14 05:54:17,457 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:54:17,457 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 722 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1178 Invalid, 0 Unknown, 127 Unchecked, 1.1s Time] [2024-11-14 05:54:17,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2024-11-14 05:54:17,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 420. [2024-11-14 05:54:17,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 416 states have (on average 1.1201923076923077) internal successors, (466), 419 states have internal predecessors, (466), 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 05:54:17,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 466 transitions. [2024-11-14 05:54:17,461 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 466 transitions. Word has length 50 [2024-11-14 05:54:17,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:54:17,461 INFO L471 AbstractCegarLoop]: Abstraction has 420 states and 466 transitions. [2024-11-14 05:54:17,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 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 05:54:17,461 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 466 transitions. [2024-11-14 05:54:17,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-14 05:54:17,463 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:54:17,464 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:54:17,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-14 05:54:17,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-14 05:54:17,664 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:54:17,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:54:17,665 INFO L85 PathProgramCache]: Analyzing trace with hash -753403304, now seen corresponding path program 13 times [2024-11-14 05:54:17,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:54:17,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51618989] [2024-11-14 05:54:17,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:54:17,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:54:17,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:54:19,058 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 17 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:54:19,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:54:19,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51618989] [2024-11-14 05:54:19,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51618989] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:54:19,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504907203] [2024-11-14 05:54:19,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:54:19,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:54:19,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:54:19,060 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:54:19,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-14 05:54:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:54:19,253 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-11-14 05:54:19,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:54:19,260 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 05:54:20,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 9 [2024-11-14 05:54:20,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:54:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 16 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:54:20,393 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:54:20,725 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:54:20,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 05:54:20,737 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:54:20,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:54:21,099 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 16 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:54:21,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504907203] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:54:21,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [446779578] [2024-11-14 05:54:21,100 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-14 05:54:21,101 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:54:21,101 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:54:21,101 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:54:21,101 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:54:21,615 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:54:25,632 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27228#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_387| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_390| Int)) (and (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_390|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_390| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_387| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_387|) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_390|)))' at error location [2024-11-14 05:54:25,632 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:54:25,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:54:25,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 39 [2024-11-14 05:54:25,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042894024] [2024-11-14 05:54:25,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:54:25,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-14 05:54:25,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:54:25,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-14 05:54:25,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2706, Unknown=16, NotChecked=0, Total=2862 [2024-11-14 05:54:25,634 INFO L87 Difference]: Start difference. First operand 420 states and 466 transitions. Second operand has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 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 05:54:29,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:54:29,450 INFO L93 Difference]: Finished difference Result 501 states and 555 transitions. [2024-11-14 05:54:29,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-14 05:54:29,450 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 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 51 [2024-11-14 05:54:29,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:54:29,452 INFO L225 Difference]: With dead ends: 501 [2024-11-14 05:54:29,452 INFO L226 Difference]: Without dead ends: 469 [2024-11-14 05:54:29,452 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=244, Invalid=4994, Unknown=18, NotChecked=0, Total=5256 [2024-11-14 05:54:29,452 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 1603 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:54:29,453 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 717 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1603 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-14 05:54:29,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2024-11-14 05:54:29,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 438. [2024-11-14 05:54:29,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 434 states have (on average 1.1290322580645162) internal successors, (490), 437 states have internal predecessors, (490), 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 05:54:29,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 490 transitions. [2024-11-14 05:54:29,460 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 490 transitions. Word has length 51 [2024-11-14 05:54:29,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:54:29,461 INFO L471 AbstractCegarLoop]: Abstraction has 438 states and 490 transitions. [2024-11-14 05:54:29,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 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 05:54:29,461 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 490 transitions. [2024-11-14 05:54:29,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-14 05:54:29,462 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:54:29,462 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:54:29,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-14 05:54:29,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:54:29,664 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:54:29,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:54:29,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1689102969, now seen corresponding path program 12 times [2024-11-14 05:54:29,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:54:29,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121502392] [2024-11-14 05:54:29,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:54:29,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:54:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:54:32,795 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:54:32,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:54:32,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121502392] [2024-11-14 05:54:32,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121502392] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:54:32,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777351715] [2024-11-14 05:54:32,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:54:32,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:54:32,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:54:32,798 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:54:32,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-14 05:54:33,647 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:54:33,647 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:54:33,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-11-14 05:54:33,655 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:54:33,670 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 05:54:35,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-14 05:54:35,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 05:54:35,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 05:54:36,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 05:54:36,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 05:54:36,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 05:54:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:54:36,813 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:54:36,829 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2009 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2009) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2024-11-14 05:54:36,859 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2009 (Array Int Int)) (v_ArrVal_2008 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_2008) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2009) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2024-11-14 05:54:37,278 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2009 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2009) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:54:37,298 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2009 (Array Int Int)) (v_ArrVal_2006 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_2006) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2009) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:54:39,525 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2009 (Array Int Int)) (v_ArrVal_2005 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_2005) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2009) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:54:39,793 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:54:39,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 05:54:39,807 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:54:39,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:54:39,812 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 3 [2024-11-14 05:54:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 31 not checked. [2024-11-14 05:54:41,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777351715] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:54:41,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1537397005] [2024-11-14 05:54:41,008 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 05:54:41,008 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:54:41,008 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:54:41,009 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:54:41,009 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:54:41,679 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:54:47,141 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28598#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_395| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_398| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_395|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_398| 1)) (< |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_398| 0)) (or (and (exists ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_281| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_313| Int) (|v_#memory_int_817| (Array Int (Array Int Int)))) (and (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_281|) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_281| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_313|)) (= |#memory_int| (store |v_#memory_int_817| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_313| (store (select |v_#memory_int_817| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_313|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_281| 0))) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_313|) 1))) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_395| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_74| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_74| 4294967296) 0))) (= |ULTIMATE.start_cstrlcpy_~s~0#1.offset| (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_398| 1)) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_300| Int)) (= 0 (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_300| 4294967296))) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_282| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_282| 4294967296) 0))) (and (<= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_398| (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_395|)) (exists ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_281| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_313| Int) (|v_#memory_int_817| (Array Int (Array Int Int)))) (and (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_281|) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_281| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_313|)) (= |#memory_int| (store |v_#memory_int_817| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_313| (store (select |v_#memory_int_817| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_313|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_281| 0))) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_313|) 1))) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_395| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_74| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_74| 4294967296) 0))) (= |ULTIMATE.start_cstrlcpy_~s~0#1.offset| (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_398| 1)) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_398|) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_300| Int)) (= 0 (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_300| 4294967296))) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_395|) (+ (- 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_398|)) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_282| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_282| 4294967296) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_395|) 1)))))' at error location [2024-11-14 05:54:47,141 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:54:47,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:54:47,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26, 22] total 72 [2024-11-14 05:54:47,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297250698] [2024-11-14 05:54:47,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:54:47,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-14 05:54:47,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:54:47,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-14 05:54:47,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=6104, Unknown=63, NotChecked=810, Total=7310 [2024-11-14 05:54:47,143 INFO L87 Difference]: Start difference. First operand 438 states and 490 transitions. Second operand has 73 states, 73 states have (on average 1.9726027397260273) internal successors, (144), 72 states have internal predecessors, (144), 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 05:54:51,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:54:51,187 INFO L93 Difference]: Finished difference Result 460 states and 510 transitions. [2024-11-14 05:54:51,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-14 05:54:51,188 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.9726027397260273) internal successors, (144), 72 states have internal predecessors, (144), 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 52 [2024-11-14 05:54:51,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:54:51,190 INFO L225 Difference]: With dead ends: 460 [2024-11-14 05:54:51,190 INFO L226 Difference]: Without dead ends: 429 [2024-11-14 05:54:51,191 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 97 SyntacticMatches, 8 SemanticMatches, 92 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 2512 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=397, Invalid=7391, Unknown=64, NotChecked=890, Total=8742 [2024-11-14 05:54:51,191 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 27 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 1793 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 2184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 386 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:54:51,191 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 1065 Invalid, 2184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1793 Invalid, 0 Unknown, 386 Unchecked, 2.6s Time] [2024-11-14 05:54:51,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2024-11-14 05:54:51,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 385. [2024-11-14 05:54:51,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 381 states have (on average 1.1391076115485563) internal successors, (434), 384 states have internal predecessors, (434), 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 05:54:51,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 434 transitions. [2024-11-14 05:54:51,196 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 434 transitions. Word has length 52 [2024-11-14 05:54:51,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:54:51,197 INFO L471 AbstractCegarLoop]: Abstraction has 385 states and 434 transitions. [2024-11-14 05:54:51,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.9726027397260273) internal successors, (144), 72 states have internal predecessors, (144), 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 05:54:51,197 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 434 transitions. [2024-11-14 05:54:51,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-14 05:54:51,198 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:54:51,198 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:54:51,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-14 05:54:51,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:54:51,399 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:54:51,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:54:51,399 INFO L85 PathProgramCache]: Analyzing trace with hash -469386794, now seen corresponding path program 13 times [2024-11-14 05:54:51,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:54:51,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278545827] [2024-11-14 05:54:51,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:54:51,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:54:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:54:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 05:54:53,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:54:53,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278545827] [2024-11-14 05:54:53,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278545827] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:54:53,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739443464] [2024-11-14 05:54:53,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:54:53,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:54:53,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:54:53,168 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:54:53,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-14 05:54:53,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:54:53,428 INFO L255 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 106 conjuncts are in the unsatisfiable core [2024-11-14 05:54:53,431 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:54:54,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:54:54,530 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-14 05:54:54,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-14 05:54:54,853 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-14 05:54:54,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2024-11-14 05:54:55,179 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-14 05:54:55,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2024-11-14 05:54:55,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-14 05:54:56,358 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 05:54:56,358 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:54:57,232 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:54:57,232 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2024-11-14 05:54:58,457 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_320| Int) (v_arrayElimArr_20 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_320| v_arrayElimArr_20) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (or (= (select .cse0 (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0) (= (select .cse0 (+ 5 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0) (not (= (select v_arrayElimArr_20 (+ |c_ULTIMATE.start_cstrlcpy_~d~0#1.offset| 3)) 0))))) is different from false [2024-11-14 05:54:58,500 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:54:58,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2024-11-14 05:54:58,528 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:54:58,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 59 [2024-11-14 05:54:58,557 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:54:58,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 37 [2024-11-14 05:55:00,209 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 9 trivial. 6 not checked. [2024-11-14 05:55:00,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739443464] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:55:00,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [973190407] [2024-11-14 05:55:00,211 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 05:55:00,211 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:55:00,211 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:55:00,211 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:55:00,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:55:00,947 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:55:04,713 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29854#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_411| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_408| Int)) (and (or (and (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_76| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_76| 4294967296) 0))) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_293| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_293| 4294967296) 0)) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_411|) (exists ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_326| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_295| Int) (|v_#memory_int_849| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_849| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_326| (store (select |v_#memory_int_849| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_326|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_295| 0))) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_295|) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_326|) 1) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_295| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_326|)))) (= |ULTIMATE.start_cstrlcpy_~s~0#1.offset| (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_411| 1)) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_408| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_408|) 1) (<= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_411| (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_408|)) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_311| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_311| 4294967296) 0)) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_408|) (+ (- 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_411|)) 0))) (and (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_76| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_76| 4294967296) 0))) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_293| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_293| 4294967296) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_326| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_295| Int) (|v_#memory_int_849| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_849| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_326| (store (select |v_#memory_int_849| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_326|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_295| 0))) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_295|) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_326|) 1) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_295| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_326|)))) (= |ULTIMATE.start_cstrlcpy_~s~0#1.offset| (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_411| 1)) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_408| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_311| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_311| 4294967296) 0)))) (or (< |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_411| 0) (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_408|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_411| 1)))))' at error location [2024-11-14 05:55:04,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:55:04,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:55:04,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 64 [2024-11-14 05:55:04,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285800384] [2024-11-14 05:55:04,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:55:04,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-14 05:55:04,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:55:04,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-14 05:55:04,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=5539, Unknown=59, NotChecked=150, Total=6006 [2024-11-14 05:55:04,715 INFO L87 Difference]: Start difference. First operand 385 states and 434 transitions. Second operand has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 64 states have internal predecessors, (136), 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 05:55:10,934 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) (.cse2 (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse3 (+ |c_ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1))) (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse0) 0) (forall ((v_arrayElimArr_20 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_arrayElimArr_20) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (or (= (select .cse1 .cse0) 0) (= (select .cse1 .cse2) 0) (not (= (select v_arrayElimArr_20 .cse3) 0))))) (forall ((v_ArrVal_2076 (Array Int Int)) (v_arrayElimArr_20 (Array Int Int))) (let ((.cse4 (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_2076) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_arrayElimArr_20) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (or (= (select .cse4 .cse0) 0) (= (select .cse4 .cse2) 0) (not (= (select v_arrayElimArr_20 .cse3) 0))))))) is different from false [2024-11-14 05:55:12,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:55:12,215 INFO L93 Difference]: Finished difference Result 447 states and 498 transitions. [2024-11-14 05:55:12,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-14 05:55:12,216 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 64 states have internal predecessors, (136), 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 53 [2024-11-14 05:55:12,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:55:12,217 INFO L225 Difference]: With dead ends: 447 [2024-11-14 05:55:12,217 INFO L226 Difference]: Without dead ends: 415 [2024-11-14 05:55:12,217 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1792 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=466, Invalid=9951, Unknown=97, NotChecked=406, Total=10920 [2024-11-14 05:55:12,218 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 12 mSDsluCounter, 1225 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 7 mSolverCounterUnsat, 180 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 2456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 180 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:55:12,218 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1265 Invalid, 2456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1917 Invalid, 180 Unknown, 352 Unchecked, 3.8s Time] [2024-11-14 05:55:12,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2024-11-14 05:55:12,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 396. [2024-11-14 05:55:12,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 392 states have (on average 1.1377551020408163) internal successors, (446), 395 states have internal predecessors, (446), 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 05:55:12,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 446 transitions. [2024-11-14 05:55:12,224 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 446 transitions. Word has length 53 [2024-11-14 05:55:12,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:55:12,224 INFO L471 AbstractCegarLoop]: Abstraction has 396 states and 446 transitions. [2024-11-14 05:55:12,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 64 states have internal predecessors, (136), 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 05:55:12,224 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 446 transitions. [2024-11-14 05:55:12,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-14 05:55:12,225 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:55:12,225 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:55:12,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-14 05:55:12,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:55:12,426 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:55:12,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:55:12,426 INFO L85 PathProgramCache]: Analyzing trace with hash -683248802, now seen corresponding path program 14 times [2024-11-14 05:55:12,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:55:12,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665916430] [2024-11-14 05:55:12,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:55:12,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:55:12,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:55:13,654 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 49 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:55:13,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:55:13,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665916430] [2024-11-14 05:55:13,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665916430] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:55:13,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18764970] [2024-11-14 05:55:13,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:55:13,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:55:13,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:55:13,660 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:55:13,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-14 05:55:14,005 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-14 05:55:14,005 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:55:14,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-14 05:55:14,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:55:15,292 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 49 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:55:15,293 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:55:16,308 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 05:55:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 49 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:55:16,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18764970] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:55:16,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1725258447] [2024-11-14 05:55:16,706 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-14 05:55:16,706 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:55:16,706 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:55:16,707 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:55:16,707 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:55:17,257 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:55:20,676 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31129#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_435| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_431| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_431|) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_435|) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_435|) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_431| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= |ULTIMATE.start_cstrlcpy_~s~0#1.offset| (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_435| 1))))' at error location [2024-11-14 05:55:20,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:55:20,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:55:20,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 51 [2024-11-14 05:55:20,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863846576] [2024-11-14 05:55:20,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:55:20,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-14 05:55:20,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:55:20,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-14 05:55:20,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=3951, Unknown=0, NotChecked=0, Total=4422 [2024-11-14 05:55:20,680 INFO L87 Difference]: Start difference. First operand 396 states and 446 transitions. Second operand has 53 states, 52 states have (on average 2.673076923076923) internal successors, (139), 52 states have internal predecessors, (139), 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 05:55:23,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:55:23,887 INFO L93 Difference]: Finished difference Result 563 states and 621 transitions. [2024-11-14 05:55:23,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-14 05:55:23,888 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 2.673076923076923) internal successors, (139), 52 states have internal predecessors, (139), 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 53 [2024-11-14 05:55:23,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:55:23,890 INFO L225 Difference]: With dead ends: 563 [2024-11-14 05:55:23,890 INFO L226 Difference]: Without dead ends: 563 [2024-11-14 05:55:23,891 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 103 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=619, Invalid=5081, Unknown=0, NotChecked=0, Total=5700 [2024-11-14 05:55:23,891 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 213 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 1797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:55:23,891 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1066 Invalid, 1797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1774 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-14 05:55:23,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2024-11-14 05:55:23,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 466. [2024-11-14 05:55:23,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 462 states have (on average 1.1341991341991342) internal successors, (524), 465 states have internal predecessors, (524), 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 05:55:23,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 524 transitions. [2024-11-14 05:55:23,899 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 524 transitions. Word has length 53 [2024-11-14 05:55:23,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:55:23,899 INFO L471 AbstractCegarLoop]: Abstraction has 466 states and 524 transitions. [2024-11-14 05:55:23,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 2.673076923076923) internal successors, (139), 52 states have internal predecessors, (139), 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 05:55:23,899 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 524 transitions. [2024-11-14 05:55:23,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-14 05:55:23,901 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:55:23,901 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:55:23,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-11-14 05:55:24,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:55:24,101 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:55:24,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:55:24,102 INFO L85 PathProgramCache]: Analyzing trace with hash 2114924243, now seen corresponding path program 14 times [2024-11-14 05:55:24,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:55:24,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984502179] [2024-11-14 05:55:24,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:55:24,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:55:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:55:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-14 05:55:24,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:55:24,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984502179] [2024-11-14 05:55:24,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984502179] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:55:24,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066953204] [2024-11-14 05:55:24,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:55:24,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:55:24,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:55:24,484 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:55:24,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-14 05:55:24,866 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 05:55:24,866 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:55:24,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-14 05:55:24,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:55:24,887 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 05:55:25,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-14 05:55:25,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 05:55:25,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 05:55:26,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 05:55:26,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-14 05:55:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-14 05:55:26,371 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:55:26,781 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2195 (Array Int Int)) (v_ArrVal_2194 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_2194) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2195) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2024-11-14 05:55:26,796 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2195 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2195) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:55:26,967 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2195 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2195) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:55:26,985 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:55:26,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 05:55:26,997 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:55:26,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:55:27,012 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 3 [2024-11-14 05:55:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 40 trivial. 9 not checked. [2024-11-14 05:55:27,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066953204] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:55:27,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [455094481] [2024-11-14 05:55:27,638 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 05:55:27,639 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:55:27,639 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:55:27,639 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:55:27,639 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:55:28,259 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:55:31,372 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32551#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_447| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_451| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_447|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_451| 1)) (< |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_451| 0)) (or (and (exists ((|v_#memory_int_896| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_340| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_308| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_340|) 1) (= |#memory_int| (store |v_#memory_int_896| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_340| (store (select |v_#memory_int_896| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_340|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_308| 0))) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_308|) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_308| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_340|)))) (<= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_451| (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_447|)) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_451|) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_80| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_80| 4294967296) 0))) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_447|) 1) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_447|) (+ (- 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_451|)) 0)) (= |ULTIMATE.start_cstrlcpy_~s~0#1.offset| (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_451| 1)) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_447| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_306| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_306| 4294967296) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_325| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_325| 4294967296) 0))) (and (exists ((|v_#memory_int_896| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_340| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_308| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_340|) 1) (= |#memory_int| (store |v_#memory_int_896| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_340| (store (select |v_#memory_int_896| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_340|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_308| 0))) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_308|) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_308| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_340|)))) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_80| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_80| 4294967296) 0))) (= |ULTIMATE.start_cstrlcpy_~s~0#1.offset| (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_451| 1)) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_447| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_306| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_306| 4294967296) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_325| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_325| 4294967296) 0))))))' at error location [2024-11-14 05:55:31,373 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:55:31,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:55:31,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 43 [2024-11-14 05:55:31,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096305340] [2024-11-14 05:55:31,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:55:31,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-14 05:55:31,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:55:31,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-14 05:55:31,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2587, Unknown=30, NotChecked=312, Total=3080 [2024-11-14 05:55:31,374 INFO L87 Difference]: Start difference. First operand 466 states and 524 transitions. Second operand has 43 states, 43 states have (on average 2.4651162790697674) internal successors, (106), 43 states have internal predecessors, (106), 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 05:55:37,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:55:37,472 INFO L93 Difference]: Finished difference Result 598 states and 660 transitions. [2024-11-14 05:55:37,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-14 05:55:37,472 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.4651162790697674) internal successors, (106), 43 states have internal predecessors, (106), 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 54 [2024-11-14 05:55:37,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:55:37,474 INFO L225 Difference]: With dead ends: 598 [2024-11-14 05:55:37,474 INFO L226 Difference]: Without dead ends: 545 [2024-11-14 05:55:37,474 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 117 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=292, Invalid=5090, Unknown=32, NotChecked=438, Total=5852 [2024-11-14 05:55:37,474 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 1484 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 1805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:55:37,475 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 720 Invalid, 1805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1484 Invalid, 0 Unknown, 313 Unchecked, 2.0s Time] [2024-11-14 05:55:37,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2024-11-14 05:55:37,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 506. [2024-11-14 05:55:37,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 502 states have (on average 1.1254980079681276) internal successors, (565), 505 states have internal predecessors, (565), 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 05:55:37,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 565 transitions. [2024-11-14 05:55:37,480 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 565 transitions. Word has length 54 [2024-11-14 05:55:37,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:55:37,481 INFO L471 AbstractCegarLoop]: Abstraction has 506 states and 565 transitions. [2024-11-14 05:55:37,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.4651162790697674) internal successors, (106), 43 states have internal predecessors, (106), 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 05:55:37,481 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 565 transitions. [2024-11-14 05:55:37,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-14 05:55:37,482 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:55:37,483 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:55:37,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-14 05:55:37,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:55:37,683 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:55:37,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:55:37,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1707082081, now seen corresponding path program 15 times [2024-11-14 05:55:37,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:55:37,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289277627] [2024-11-14 05:55:37,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:55:37,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:55:37,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:55:39,201 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 05:55:39,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:55:39,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289277627] [2024-11-14 05:55:39,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289277627] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:55:39,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192242218] [2024-11-14 05:55:39,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:55:39,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:55:39,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:55:39,204 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:55:39,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-14 05:55:39,706 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:55:39,707 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:55:39,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-11-14 05:55:39,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:55:39,728 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 05:55:40,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 9 [2024-11-14 05:55:40,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:55:40,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:55:41,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:55:41,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:55:41,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-14 05:55:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 05:55:41,588 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:55:42,078 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2261 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2261) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:55:42,096 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2259 (Array Int Int)) (v_ArrVal_2261 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_2259) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2261) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:55:42,292 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2258 (Array Int Int)) (v_ArrVal_2261 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_2258) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2261) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:55:42,305 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2261 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2261) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:55:42,322 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:55:42,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 05:55:42,335 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:55:42,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:55:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 18 not checked. [2024-11-14 05:55:42,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192242218] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:55:42,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1912272606] [2024-11-14 05:55:42,693 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 05:55:42,693 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:55:42,693 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:55:42,694 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:55:42,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:55:43,360 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:55:48,549 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34079#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_461| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_465| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_461|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_465| 1)) (< |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_465| 0)) (or (and (exists ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_318| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_354| Int) (|v_#memory_int_927| (Array Int (Array Int Int)))) (and (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_354|) 1) (= |#memory_int| (store |v_#memory_int_927| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_354| (store (select |v_#memory_int_927| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_354|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_318| 0))) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_318|) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_318| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_354|)))) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_336| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_336| 4294967296) 0)) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_465| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_317| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_317| 4294967296) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_82| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_82| 4294967296) 0))) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_461| |ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (and (exists ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_318| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_354| Int) (|v_#memory_int_927| (Array Int (Array Int Int)))) (and (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_354|) 1) (= |#memory_int| (store |v_#memory_int_927| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_354| (store (select |v_#memory_int_927| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_354|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_318| 0))) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_318|) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_318| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_354|)))) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_461|) 1) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_336| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_336| 4294967296) 0)) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_465| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_317| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_317| 4294967296) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_82| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_82| 4294967296) 0))) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_465|) (not (= 0 (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_461|) (+ (- 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_465|)))) (<= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_465| (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_461|)) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_461| |ULTIMATE.start_cstrlcpy_~s~0#1.base|)))))' at error location [2024-11-14 05:55:48,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:55:48,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:55:48,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 47 [2024-11-14 05:55:48,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989456827] [2024-11-14 05:55:48,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:55:48,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-14 05:55:48,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:55:48,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-14 05:55:48,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3002, Unknown=56, NotChecked=452, Total=3660 [2024-11-14 05:55:48,551 INFO L87 Difference]: Start difference. First operand 506 states and 565 transitions. Second operand has 48 states, 48 states have (on average 2.5625) internal successors, (123), 47 states have internal predecessors, (123), 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 05:55:52,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:55:52,910 INFO L93 Difference]: Finished difference Result 535 states and 593 transitions. [2024-11-14 05:55:52,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-14 05:55:52,911 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.5625) internal successors, (123), 47 states have internal predecessors, (123), 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 54 [2024-11-14 05:55:52,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:55:52,912 INFO L225 Difference]: With dead ends: 535 [2024-11-14 05:55:52,912 INFO L226 Difference]: Without dead ends: 495 [2024-11-14 05:55:52,913 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=302, Invalid=5814, Unknown=62, NotChecked=628, Total=6806 [2024-11-14 05:55:52,913 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:55:52,913 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 806 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1257 Invalid, 0 Unknown, 218 Unchecked, 1.8s Time] [2024-11-14 05:55:52,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2024-11-14 05:55:52,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 495. [2024-11-14 05:55:52,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 491 states have (on average 1.1221995926680244) internal successors, (551), 494 states have internal predecessors, (551), 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 05:55:52,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 551 transitions. [2024-11-14 05:55:52,920 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 551 transitions. Word has length 54 [2024-11-14 05:55:52,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:55:52,920 INFO L471 AbstractCegarLoop]: Abstraction has 495 states and 551 transitions. [2024-11-14 05:55:52,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.5625) internal successors, (123), 47 states have internal predecessors, (123), 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 05:55:52,920 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 551 transitions. [2024-11-14 05:55:52,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-14 05:55:52,922 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:55:52,922 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:55:52,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-14 05:55:53,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:55:53,123 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:55:53,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:55:53,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1152592022, now seen corresponding path program 9 times [2024-11-14 05:55:53,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:55:53,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531615008] [2024-11-14 05:55:53,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:55:53,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:55:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:55:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 16 proven. 74 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 05:55:53,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:55:53,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531615008] [2024-11-14 05:55:53,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531615008] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:55:53,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445275394] [2024-11-14 05:55:53,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:55:53,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:55:53,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:55:53,932 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:55:53,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-14 05:55:54,652 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:55:54,652 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:55:54,656 INFO L255 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-14 05:55:54,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:55:54,666 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 05:55:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 16 proven. 74 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 05:55:55,292 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:55:56,579 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 16 proven. 74 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 05:55:56,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445275394] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:55:56,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [867039657] [2024-11-14 05:55:56,580 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:55:56,580 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:55:56,581 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:55:56,581 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:55:56,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:55:57,547 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:55:59,131 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35520#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_329| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_327| Int)) (and (= |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_327| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_329| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_330| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_330| 4294967296) 0))) (or (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_327|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_329| 1)) (< |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_329| 0)) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|)))' at error location [2024-11-14 05:55:59,131 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:55:59,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:55:59,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2024-11-14 05:55:59,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209126486] [2024-11-14 05:55:59,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:55:59,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-14 05:55:59,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:55:59,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-14 05:55:59,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1944, Unknown=1, NotChecked=0, Total=2162 [2024-11-14 05:55:59,132 INFO L87 Difference]: Start difference. First operand 495 states and 551 transitions. Second operand has 36 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 35 states have internal predecessors, (113), 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 05:56:00,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:56:00,520 INFO L93 Difference]: Finished difference Result 618 states and 676 transitions. [2024-11-14 05:56:00,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 05:56:00,520 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 35 states have internal predecessors, (113), 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 54 [2024-11-14 05:56:00,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:56:00,523 INFO L225 Difference]: With dead ends: 618 [2024-11-14 05:56:00,523 INFO L226 Difference]: Without dead ends: 618 [2024-11-14 05:56:00,523 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=273, Invalid=2482, Unknown=1, NotChecked=0, Total=2756 [2024-11-14 05:56:00,523 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 123 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:56:00,523 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 487 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 05:56:00,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2024-11-14 05:56:00,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 504. [2024-11-14 05:56:00,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 500 states have (on average 1.122) internal successors, (561), 503 states have internal predecessors, (561), 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 05:56:00,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 561 transitions. [2024-11-14 05:56:00,528 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 561 transitions. Word has length 54 [2024-11-14 05:56:00,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:56:00,528 INFO L471 AbstractCegarLoop]: Abstraction has 504 states and 561 transitions. [2024-11-14 05:56:00,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 35 states have internal predecessors, (113), 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 05:56:00,529 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 561 transitions. [2024-11-14 05:56:00,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-14 05:56:00,530 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:56:00,530 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:56:00,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-14 05:56:00,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-11-14 05:56:00,730 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:56:00,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:56:00,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1987440101, now seen corresponding path program 16 times [2024-11-14 05:56:00,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:56:00,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100803734] [2024-11-14 05:56:00,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:56:00,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:56:00,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:56:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:56:02,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:56:02,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100803734] [2024-11-14 05:56:02,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100803734] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:56:02,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852072971] [2024-11-14 05:56:02,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:56:02,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:56:02,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:56:02,391 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:56:02,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-14 05:56:02,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:56:02,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-11-14 05:56:02,678 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:56:02,686 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 05:56:03,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 9 [2024-11-14 05:56:03,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:56:03,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:56:03,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:56:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:56:03,885 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:56:03,941 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2404 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2404) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:56:05,970 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2404 (Array Int Int)) (v_ArrVal_2403 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_2403) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2404) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:56:06,292 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2404 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2404) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:56:06,311 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:56:06,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 05:56:06,325 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:56:06,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:56:06,663 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 4 trivial. 9 not checked. [2024-11-14 05:56:06,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852072971] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:56:06,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2010137865] [2024-11-14 05:56:06,665 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 05:56:06,665 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:56:06,665 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:56:06,665 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:56:06,665 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:56:12,262 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:56:41,703 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37028#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_478| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_482| Int)) (and (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_482|) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_478| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_478|) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_482|) (= |ULTIMATE.start_cstrlcpy_~s~0#1.offset| (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_482| 1))))' at error location [2024-11-14 05:56:41,704 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:56:41,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:56:41,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22, 22] total 44 [2024-11-14 05:56:41,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902550360] [2024-11-14 05:56:41,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:56:41,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-14 05:56:41,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:56:41,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-14 05:56:41,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3419, Unknown=61, NotChecked=360, Total=4032 [2024-11-14 05:56:41,705 INFO L87 Difference]: Start difference. First operand 504 states and 561 transitions. Second operand has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 44 states have internal predecessors, (101), 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 05:56:44,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:56:44,236 INFO L93 Difference]: Finished difference Result 548 states and 604 transitions. [2024-11-14 05:56:44,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-14 05:56:44,237 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 44 states have internal predecessors, (101), 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 54 [2024-11-14 05:56:44,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:56:44,238 INFO L225 Difference]: With dead ends: 548 [2024-11-14 05:56:44,238 INFO L226 Difference]: Without dead ends: 515 [2024-11-14 05:56:44,239 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 34.7s TimeCoverageRelationStatistics Valid=242, Invalid=4399, Unknown=63, NotChecked=408, Total=5112 [2024-11-14 05:56:44,239 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:56:44,239 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 668 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1082 Invalid, 0 Unknown, 195 Unchecked, 1.5s Time] [2024-11-14 05:56:44,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2024-11-14 05:56:44,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 484. [2024-11-14 05:56:44,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 480 states have (on average 1.1208333333333333) internal successors, (538), 483 states have internal predecessors, (538), 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 05:56:44,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 538 transitions. [2024-11-14 05:56:44,247 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 538 transitions. Word has length 54 [2024-11-14 05:56:44,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:56:44,247 INFO L471 AbstractCegarLoop]: Abstraction has 484 states and 538 transitions. [2024-11-14 05:56:44,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 44 states have internal predecessors, (101), 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 05:56:44,247 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 538 transitions. [2024-11-14 05:56:44,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-14 05:56:44,249 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:56:44,249 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:56:44,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-11-14 05:56:44,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-11-14 05:56:44,449 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:56:44,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:56:44,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1370614304, now seen corresponding path program 5 times [2024-11-14 05:56:44,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:56:44,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568120882] [2024-11-14 05:56:44,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:56:44,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:56:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:56:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 9 proven. 86 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 05:56:45,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:56:45,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568120882] [2024-11-14 05:56:45,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568120882] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:56:45,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32819115] [2024-11-14 05:56:45,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:56:45,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:56:45,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:56:45,185 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:56:45,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-14 05:56:45,972 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 05:56:45,972 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:56:45,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-14 05:56:45,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:56:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 05:56:46,815 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:56:47,668 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 05:56:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 05:56:47,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32819115] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:56:47,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [247493209] [2024-11-14 05:56:47,908 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:56:47,908 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:56:47,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:56:47,908 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:56:47,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:56:48,635 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:56:51,063 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '38464#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_381| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_344| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_381|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_344| 1)) (< |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_344| 0)) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|)))' at error location [2024-11-14 05:56:51,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:56:51,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:56:51,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 41 [2024-11-14 05:56:51,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612512887] [2024-11-14 05:56:51,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:56:51,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-14 05:56:51,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:56:51,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-14 05:56:51,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=2498, Unknown=3, NotChecked=0, Total=2756 [2024-11-14 05:56:51,064 INFO L87 Difference]: Start difference. First operand 484 states and 538 transitions. Second operand has 42 states, 41 states have (on average 3.073170731707317) internal successors, (126), 42 states have internal predecessors, (126), 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 05:56:52,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:56:52,546 INFO L93 Difference]: Finished difference Result 529 states and 580 transitions. [2024-11-14 05:56:52,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 05:56:52,546 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.073170731707317) internal successors, (126), 42 states have internal predecessors, (126), 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 55 [2024-11-14 05:56:52,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:56:52,548 INFO L225 Difference]: With dead ends: 529 [2024-11-14 05:56:52,548 INFO L226 Difference]: Without dead ends: 529 [2024-11-14 05:56:52,548 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 116 SyntacticMatches, 12 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1555 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=342, Invalid=3195, Unknown=3, NotChecked=0, Total=3540 [2024-11-14 05:56:52,549 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 80 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:56:52,549 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 667 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 05:56:52,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2024-11-14 05:56:52,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 484. [2024-11-14 05:56:52,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 480 states have (on average 1.1145833333333333) internal successors, (535), 483 states have internal predecessors, (535), 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 05:56:52,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 535 transitions. [2024-11-14 05:56:52,556 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 535 transitions. Word has length 55 [2024-11-14 05:56:52,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:56:52,556 INFO L471 AbstractCegarLoop]: Abstraction has 484 states and 535 transitions. [2024-11-14 05:56:52,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.073170731707317) internal successors, (126), 42 states have internal predecessors, (126), 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 05:56:52,556 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 535 transitions. [2024-11-14 05:56:52,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-14 05:56:52,557 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:56:52,558 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:56:52,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-14 05:56:52,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-11-14 05:56:52,759 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:56:52,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:56:52,759 INFO L85 PathProgramCache]: Analyzing trace with hash 916644202, now seen corresponding path program 17 times [2024-11-14 05:56:52,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:56:52,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437653864] [2024-11-14 05:56:52,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:56:52,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:56:52,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:56:54,521 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:56:54,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:56:54,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437653864] [2024-11-14 05:56:54,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437653864] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:56:54,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661598289] [2024-11-14 05:56:54,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:56:54,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:56:54,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:56:54,523 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:56:54,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-14 05:56:54,923 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-14 05:56:54,924 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:56:54,928 INFO L255 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-11-14 05:56:54,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:56:54,940 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 05:56:55,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 9 [2024-11-14 05:56:56,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:56:56,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:56:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:56:56,143 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:56:56,390 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2539 (Array Int Int)) (v_ArrVal_2540 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_2539) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2540) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:56:56,581 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:56:56,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 05:56:56,594 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:56:56,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:56:56,938 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:56:56,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661598289] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:56:56,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [721275300] [2024-11-14 05:56:56,939 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 05:56:56,939 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:56:56,939 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:56:56,940 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:56:56,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:56:57,638 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:57:03,158 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39869#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_503| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_499| Int)) (and (or (and (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_358| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_358| 4294967296) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_377| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_377| 4294967296) 0)) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_499| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_88| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_88| 4294967296) 0))) (exists ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_403| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_362| Int) (|v_#memory_int_1036| (Array Int (Array Int Int)))) (and (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_362| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_403|)) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_403|) 1) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_362|) (= |#memory_int| (store |v_#memory_int_1036| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_403| (store (select |v_#memory_int_1036| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_403|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_362| 0))))) (= |ULTIMATE.start_cstrlcpy_~s~0#1.offset| (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_503| 1))) (and (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_358| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_358| 4294967296) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_499|) 1) (<= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_503| (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_499|)) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_499|) (+ (- 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_503|)) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_377| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_377| 4294967296) 0)) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_499| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_88| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_88| 4294967296) 0))) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_503|) (exists ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_403| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_362| Int) (|v_#memory_int_1036| (Array Int (Array Int Int)))) (and (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_362| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_403|)) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_403|) 1) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_362|) (= |#memory_int| (store |v_#memory_int_1036| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_403| (store (select |v_#memory_int_1036| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_403|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_362| 0))))) (= |ULTIMATE.start_cstrlcpy_~s~0#1.offset| (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_503| 1)))) (or (< |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_503| 0) (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_499|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_503| 1)))))' at error location [2024-11-14 05:57:03,159 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:57:03,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:57:03,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 42 [2024-11-14 05:57:03,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326913285] [2024-11-14 05:57:03,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:57:03,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-14 05:57:03,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:57:03,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-14 05:57:03,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2786, Unknown=30, NotChecked=106, Total=3080 [2024-11-14 05:57:03,160 INFO L87 Difference]: Start difference. First operand 484 states and 535 transitions. Second operand has 43 states, 43 states have (on average 2.2790697674418605) internal successors, (98), 42 states have internal predecessors, (98), 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 05:57:05,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:57:05,549 INFO L93 Difference]: Finished difference Result 538 states and 588 transitions. [2024-11-14 05:57:05,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-14 05:57:05,550 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2790697674418605) internal successors, (98), 42 states have internal predecessors, (98), 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 55 [2024-11-14 05:57:05,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:57:05,551 INFO L225 Difference]: With dead ends: 538 [2024-11-14 05:57:05,552 INFO L226 Difference]: Without dead ends: 504 [2024-11-14 05:57:05,552 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 131 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=206, Invalid=3674, Unknown=30, NotChecked=122, Total=4032 [2024-11-14 05:57:05,552 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:57:05,552 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 652 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1174 Invalid, 0 Unknown, 72 Unchecked, 1.6s Time] [2024-11-14 05:57:05,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2024-11-14 05:57:05,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 481. [2024-11-14 05:57:05,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 477 states have (on average 1.1111111111111112) internal successors, (530), 480 states have internal predecessors, (530), 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 05:57:05,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 530 transitions. [2024-11-14 05:57:05,559 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 530 transitions. Word has length 55 [2024-11-14 05:57:05,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:57:05,560 INFO L471 AbstractCegarLoop]: Abstraction has 481 states and 530 transitions. [2024-11-14 05:57:05,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2790697674418605) internal successors, (98), 42 states have internal predecessors, (98), 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 05:57:05,560 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 530 transitions. [2024-11-14 05:57:05,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-14 05:57:05,561 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:57:05,561 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:57:05,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-14 05:57:05,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-11-14 05:57:05,762 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:57:05,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:57:05,762 INFO L85 PathProgramCache]: Analyzing trace with hash -814999215, now seen corresponding path program 15 times [2024-11-14 05:57:05,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:57:05,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915672618] [2024-11-14 05:57:05,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:57:05,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:57:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:57:07,552 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 19 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:57:07,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:57:07,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915672618] [2024-11-14 05:57:07,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915672618] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:57:07,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001346462] [2024-11-14 05:57:07,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:57:07,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:57:07,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:57:07,559 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:57:07,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-14 05:57:07,939 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:57:07,939 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:57:07,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 111 conjuncts are in the unsatisfiable core [2024-11-14 05:57:07,945 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:57:08,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:57:08,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-14 05:57:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 18 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:57:10,098 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:57:10,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-14 05:57:10,593 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:57:10,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2024-11-14 05:57:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 21 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:57:11,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001346462] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:57:11,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1494485414] [2024-11-14 05:57:11,864 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-14 05:57:11,864 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:57:11,864 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:57:11,864 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:57:11,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:57:12,531 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:57:16,886 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '41302#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_526| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_530| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_526|) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_530|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_530| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_530|) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_526| |ULTIMATE.start_cstrlcpy_~s~0#1.base|)))' at error location [2024-11-14 05:57:16,886 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:57:16,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:57:16,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 25] total 53 [2024-11-14 05:57:16,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788754057] [2024-11-14 05:57:16,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:57:16,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-14 05:57:16,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:57:16,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-14 05:57:16,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=4346, Unknown=0, NotChecked=0, Total=4556 [2024-11-14 05:57:16,888 INFO L87 Difference]: Start difference. First operand 481 states and 530 transitions. Second operand has 54 states, 54 states have (on average 2.2222222222222223) internal successors, (120), 53 states have internal predecessors, (120), 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 05:57:19,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:57:19,882 INFO L93 Difference]: Finished difference Result 574 states and 632 transitions. [2024-11-14 05:57:19,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-14 05:57:19,883 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.2222222222222223) internal successors, (120), 53 states have internal predecessors, (120), 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 56 [2024-11-14 05:57:19,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:57:19,885 INFO L225 Difference]: With dead ends: 574 [2024-11-14 05:57:19,885 INFO L226 Difference]: Without dead ends: 539 [2024-11-14 05:57:19,886 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=245, Invalid=5305, Unknown=0, NotChecked=0, Total=5550 [2024-11-14 05:57:19,886 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:57:19,886 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 663 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-14 05:57:19,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2024-11-14 05:57:19,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 501. [2024-11-14 05:57:19,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 497 states have (on average 1.1207243460764587) internal successors, (557), 500 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 05:57:19,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 557 transitions. [2024-11-14 05:57:19,893 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 557 transitions. Word has length 56 [2024-11-14 05:57:19,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:57:19,893 INFO L471 AbstractCegarLoop]: Abstraction has 501 states and 557 transitions. [2024-11-14 05:57:19,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.2222222222222223) internal successors, (120), 53 states have internal predecessors, (120), 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 05:57:19,893 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 557 transitions. [2024-11-14 05:57:19,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-14 05:57:19,895 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:57:19,895 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:57:19,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2024-11-14 05:57:20,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:57:20,096 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:57:20,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:57:20,096 INFO L85 PathProgramCache]: Analyzing trace with hash -196063652, now seen corresponding path program 18 times [2024-11-14 05:57:20,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:57:20,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895260878] [2024-11-14 05:57:20,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:57:20,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:57:20,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:57:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 4 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:57:24,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:57:24,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895260878] [2024-11-14 05:57:24,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895260878] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:57:24,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939304764] [2024-11-14 05:57:24,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:57:24,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:57:24,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:57:24,339 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:57:24,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-14 05:57:25,124 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:57:25,124 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:57:25,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-11-14 05:57:25,132 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:57:25,140 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 05:57:26,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 9 [2024-11-14 05:57:26,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:57:26,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:57:26,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:57:26,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:57:26,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:57:27,017 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 4 proven. 66 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 05:57:27,017 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:57:27,478 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2673 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2673) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:57:27,496 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2673 (Array Int Int)) (v_ArrVal_2671 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_2671) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2673) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:57:27,938 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2673 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2673) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)))) is different from false [2024-11-14 05:57:29,956 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2669 (Array Int Int)) (v_ArrVal_2673 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_2669) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2673) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:57:29,972 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2673 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2673) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:57:29,990 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:57:29,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 05:57:30,004 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:57:30,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:57:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 16 trivial. 33 not checked. [2024-11-14 05:57:30,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939304764] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:57:30,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1930057400] [2024-11-14 05:57:30,450 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 05:57:30,450 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:57:30,450 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:57:30,450 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:57:30,450 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:57:31,475 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:57:35,711 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '42800#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_536| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_540| Int)) (and (or (and (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_92| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_92| 4294967296) 0))) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_393| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_393| 4294967296) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_536|) 1) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_536| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_540| (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_536|)) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_540|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_540| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (exists ((|v_#memory_int_1090| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_376| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_422| Int)) (and (= |#memory_int| (store |v_#memory_int_1090| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_422| (store (select |v_#memory_int_1090| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_422|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_376| 0))) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_376| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_422|)) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_376|) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_422|) 1))) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_373| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_373| 4294967296) 0)) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_536|) (+ (- 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_540|)) 0))) (and (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_92| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_92| 4294967296) 0))) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_393| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_393| 4294967296) 0)) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_536| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_540| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (exists ((|v_#memory_int_1090| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_376| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_422| Int)) (and (= |#memory_int| (store |v_#memory_int_1090| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_422| (store (select |v_#memory_int_1090| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_422|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_376| 0))) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_376| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_422|)) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_376|) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_422|) 1))) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_373| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_373| 4294967296) 0)))) (or (< |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_540| 0) (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_536|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_540| 1)))))' at error location [2024-11-14 05:57:35,711 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:57:35,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:57:35,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 22, 22] total 58 [2024-11-14 05:57:35,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696202586] [2024-11-14 05:57:35,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:57:35,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-14 05:57:35,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:57:35,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-14 05:57:35,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=4259, Unknown=87, NotChecked=680, Total=5256 [2024-11-14 05:57:35,713 INFO L87 Difference]: Start difference. First operand 501 states and 557 transitions. Second operand has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 58 states have internal predecessors, (120), 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 05:57:47,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:57:47,538 INFO L93 Difference]: Finished difference Result 510 states and 565 transitions. [2024-11-14 05:57:47,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-14 05:57:47,538 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 58 states have internal predecessors, (120), 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 57 [2024-11-14 05:57:47,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:57:47,540 INFO L225 Difference]: With dead ends: 510 [2024-11-14 05:57:47,540 INFO L226 Difference]: Without dead ends: 476 [2024-11-14 05:57:47,540 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 129 SyntacticMatches, 8 SemanticMatches, 91 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=402, Invalid=7178, Unknown=96, NotChecked=880, Total=8556 [2024-11-14 05:57:47,541 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 17 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 1810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 331 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:57:47,541 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 829 Invalid, 1810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1461 Invalid, 0 Unknown, 331 Unchecked, 2.3s Time] [2024-11-14 05:57:47,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2024-11-14 05:57:47,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 476. [2024-11-14 05:57:47,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 472 states have (on average 1.1228813559322033) internal successors, (530), 475 states have internal predecessors, (530), 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 05:57:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 530 transitions. [2024-11-14 05:57:47,548 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 530 transitions. Word has length 57 [2024-11-14 05:57:47,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:57:47,548 INFO L471 AbstractCegarLoop]: Abstraction has 476 states and 530 transitions. [2024-11-14 05:57:47,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 58 states have internal predecessors, (120), 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 05:57:47,548 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 530 transitions. [2024-11-14 05:57:47,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-14 05:57:47,550 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:57:47,550 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:57:47,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-14 05:57:47,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:57:47,750 INFO L396 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:57:47,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:57:47,751 INFO L85 PathProgramCache]: Analyzing trace with hash 596105875, now seen corresponding path program 19 times [2024-11-14 05:57:47,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:57:47,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262705987] [2024-11-14 05:57:47,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:57:47,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:57:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:57:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 75 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 05:57:49,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:57:49,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262705987] [2024-11-14 05:57:49,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262705987] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:57:49,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679211033] [2024-11-14 05:57:49,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:57:49,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:57:49,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:57:49,780 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:57:49,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-14 05:57:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:57:50,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-11-14 05:57:50,115 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:57:50,131 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 05:57:50,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 9 [2024-11-14 05:57:51,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:57:51,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:57:51,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:57:51,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:57:51,326 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 75 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 05:57:51,326 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:57:51,364 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2747 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2747) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:57:53,390 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2747 (Array Int Int)) (v_ArrVal_2746 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_2746) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2747) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:57:53,404 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2747 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2747) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:57:53,419 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2747 (Array Int Int)) (v_ArrVal_2745 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_2745) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2747) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:57:53,432 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2747 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2747) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:57:53,449 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2747 (Array Int Int)) (v_ArrVal_2744 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_2744) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2747) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:57:53,461 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2747 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2747) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:57:53,477 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:57:53,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 05:57:53,489 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:57:53,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:57:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 54 refuted. 0 times theorem prover too weak. 9 trivial. 21 not checked. [2024-11-14 05:57:53,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679211033] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:57:53,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [534778125] [2024-11-14 05:57:53,814 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 05:57:53,815 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:57:53,815 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:57:53,815 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:57:53,815 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:57:54,516 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:57:57,398 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '44237#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_550| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_554| Int)) (and (or (< |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_554| 0) (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_550|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_554| 1))) (or (and (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_554| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_550|) 1) (exists ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_436| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_386| Int) (|v_#memory_int_1123| (Array Int (Array Int Int)))) (and (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_386|) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_436|) 1) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_386| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_436|)) (= |#memory_int| (store |v_#memory_int_1123| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_436| (store (select |v_#memory_int_1123| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_436|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_386| 0))))) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_384| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_384| 4294967296) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_94| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_94| 4294967296) 0))) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_554|) (<= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_554| (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_550|)) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_550|) (+ (- 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_554|)) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_404| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_404| 4294967296) 0)) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_550| |ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (and (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_554| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (exists ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_436| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_386| Int) (|v_#memory_int_1123| (Array Int (Array Int Int)))) (and (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_386|) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_436|) 1) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_386| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_436|)) (= |#memory_int| (store |v_#memory_int_1123| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_436| (store (select |v_#memory_int_1123| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_436|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_386| 0))))) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_384| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_384| 4294967296) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_94| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_94| 4294967296) 0))) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_404| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_404| 4294967296) 0)) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_550| |ULTIMATE.start_cstrlcpy_~s~0#1.base|)))))' at error location [2024-11-14 05:57:57,398 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:57:57,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:57:57,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 23] total 49 [2024-11-14 05:57:57,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270248985] [2024-11-14 05:57:57,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:57:57,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-14 05:57:57,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:57:57,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-14 05:57:57,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2924, Unknown=8, NotChecked=798, Total=3906 [2024-11-14 05:57:57,400 INFO L87 Difference]: Start difference. First operand 476 states and 530 transitions. Second operand has 50 states, 50 states have (on average 2.22) internal successors, (111), 49 states have internal predecessors, (111), 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 05:58:00,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:58:00,682 INFO L93 Difference]: Finished difference Result 508 states and 561 transitions. [2024-11-14 05:58:00,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-14 05:58:00,683 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.22) internal successors, (111), 49 states have internal predecessors, (111), 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 58 [2024-11-14 05:58:00,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:58:00,684 INFO L225 Difference]: With dead ends: 508 [2024-11-14 05:58:00,684 INFO L226 Difference]: Without dead ends: 473 [2024-11-14 05:58:00,685 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 135 SyntacticMatches, 10 SemanticMatches, 70 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=230, Invalid=3950, Unknown=8, NotChecked=924, Total=5112 [2024-11-14 05:58:00,685 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 475 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-14 05:58:00,685 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 847 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1292 Invalid, 0 Unknown, 475 Unchecked, 1.9s Time] [2024-11-14 05:58:00,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2024-11-14 05:58:00,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 473. [2024-11-14 05:58:00,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 469 states have (on average 1.1194029850746268) internal successors, (525), 472 states have internal predecessors, (525), 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 05:58:00,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 525 transitions. [2024-11-14 05:58:00,691 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 525 transitions. Word has length 58 [2024-11-14 05:58:00,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:58:00,691 INFO L471 AbstractCegarLoop]: Abstraction has 473 states and 525 transitions. [2024-11-14 05:58:00,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.22) internal successors, (111), 49 states have internal predecessors, (111), 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 05:58:00,692 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 525 transitions. [2024-11-14 05:58:00,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-14 05:58:00,693 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:58:00,693 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:58:00,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-11-14 05:58:00,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:58:00,894 INFO L396 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:58:00,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:58:00,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1130474485, now seen corresponding path program 16 times [2024-11-14 05:58:00,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:58:00,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651045183] [2024-11-14 05:58:00,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:58:00,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:58:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:58:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 64 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:58:02,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:58:02,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651045183] [2024-11-14 05:58:02,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651045183] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:58:02,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256553520] [2024-11-14 05:58:02,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:58:02,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:58:02,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:58:02,352 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:58:02,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-14 05:58:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:58:02,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-14 05:58:02,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:58:02,666 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 05:58:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 64 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:58:03,782 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:58:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 64 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:58:06,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256553520] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:58:06,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2117221123] [2024-11-14 05:58:06,187 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-14 05:58:06,187 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:58:06,187 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:58:06,188 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:58:06,188 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:58:06,965 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:58:11,384 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '45256#true' at error location [2024-11-14 05:58:11,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:58:11,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:58:11,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 56 [2024-11-14 05:58:11,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122631372] [2024-11-14 05:58:11,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:58:11,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-14 05:58:11,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:58:11,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-14 05:58:11,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=4350, Unknown=12, NotChecked=0, Total=4830 [2024-11-14 05:58:11,386 INFO L87 Difference]: Start difference. First operand 473 states and 525 transitions. Second operand has 58 states, 57 states have (on average 2.5789473684210527) internal successors, (147), 57 states have internal predecessors, (147), 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 05:58:15,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:58:15,499 INFO L93 Difference]: Finished difference Result 666 states and 727 transitions. [2024-11-14 05:58:15,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-14 05:58:15,499 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 2.5789473684210527) internal successors, (147), 57 states have internal predecessors, (147), 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 58 [2024-11-14 05:58:15,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:58:15,501 INFO L225 Difference]: With dead ends: 666 [2024-11-14 05:58:15,501 INFO L226 Difference]: Without dead ends: 666 [2024-11-14 05:58:15,502 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=584, Invalid=5724, Unknown=12, NotChecked=0, Total=6320 [2024-11-14 05:58:15,502 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 304 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 2114 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 2147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:58:15,502 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 1302 Invalid, 2147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2114 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-14 05:58:15,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2024-11-14 05:58:15,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 563. [2024-11-14 05:58:15,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 559 states have (on average 1.1162790697674418) internal successors, (624), 562 states have internal predecessors, (624), 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 05:58:15,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 624 transitions. [2024-11-14 05:58:15,510 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 624 transitions. Word has length 58 [2024-11-14 05:58:15,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:58:15,511 INFO L471 AbstractCegarLoop]: Abstraction has 563 states and 624 transitions. [2024-11-14 05:58:15,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 2.5789473684210527) internal successors, (147), 57 states have internal predecessors, (147), 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 05:58:15,511 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 624 transitions. [2024-11-14 05:58:15,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-14 05:58:15,512 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:58:15,512 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:58:15,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-11-14 05:58:15,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2024-11-14 05:58:15,713 INFO L396 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:58:15,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:58:15,713 INFO L85 PathProgramCache]: Analyzing trace with hash 194503857, now seen corresponding path program 10 times [2024-11-14 05:58:15,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:58:15,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686660594] [2024-11-14 05:58:15,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:58:15,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:58:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:58:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 32 proven. 85 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-14 05:58:16,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:58:16,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686660594] [2024-11-14 05:58:16,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686660594] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:58:16,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996317590] [2024-11-14 05:58:16,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:58:16,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:58:16,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:58:16,538 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:58:16,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-11-14 05:58:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:58:16,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-11-14 05:58:16,884 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:58:16,893 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 18 treesize of output 16 [2024-11-14 05:58:17,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 9 [2024-11-14 05:58:17,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:58:17,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:58:18,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:58:18,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:58:18,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 05:58:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 18 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 05:58:18,924 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:58:18,951 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2892 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_2892) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2024-11-14 05:58:18,964 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2892 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2892) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2024-11-14 05:58:19,373 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2892 (Array Int Int)) (v_ArrVal_2890 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_2890) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2892) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:58:19,397 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2892 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2892) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:58:19,729 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2892 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2892) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-14 05:58:20,210 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:58:20,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 05:58:20,225 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:58:20,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:58:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 25 trivial. 54 not checked. [2024-11-14 05:58:20,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996317590] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:58:20,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [484056365] [2024-11-14 05:58:20,630 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:58:20,630 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:58:20,631 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:58:20,631 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:58:20,631 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:58:21,304 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:58:23,496 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '47315#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_405| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_403| Int)) (and (or (< |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_405| 0) (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_403|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_405| 1))) (or (and (= (select |#valid| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) 1) (<= 1 (+ |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|)) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_405| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (not (= (mod |ULTIMATE.start_cstrlcpy_~n~0#1| 4294967296) 0)) (not (= 0 (mod (+ |ULTIMATE.start_cstrlcpy_~n~0#1| 1) 4294967296))) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_405|) (= |ULTIMATE.start_cstrlcpy_~siz#1| (+ |ULTIMATE.start_cstrlcpy_~n~0#1| 1)) (exists ((|v_#memory_int_1172| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length~0#1_261| Int)) (and (<= (+ |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_261|) (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_403|)) (= |#memory_int| (store (store |v_#memory_int_1172| |ULTIMATE.start_cstrlcpy_#t~post3#1.base| (store (select |v_#memory_int_1172| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) 0)) |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_403| (store (select (store |v_#memory_int_1172| |ULTIMATE.start_cstrlcpy_#t~post3#1.base| (store (select |v_#memory_int_1172| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) 0)) |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_403|) (+ (- 1) |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_261|) 0))) (<= 1 (+ |ULTIMATE.start_cstrlcpy_~src#1.offset| |v_ULTIMATE.start_main_~length~0#1_261|)))) (= |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_403| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= (+ |ULTIMATE.start_cstrlcpy_~siz#1| |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (select |#length| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|)) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_403|) 1)) (and (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_401| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_401| 4294967296) 0))) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_405| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_403| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|)))))' at error location [2024-11-14 05:58:23,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:58:23,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:58:23,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 50 [2024-11-14 05:58:23,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526037156] [2024-11-14 05:58:23,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:58:23,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-14 05:58:23,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:58:23,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-14 05:58:23,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2742, Unknown=102, NotChecked=550, Total=3540 [2024-11-14 05:58:23,498 INFO L87 Difference]: Start difference. First operand 563 states and 624 transitions. Second operand has 50 states, 50 states have (on average 2.56) internal successors, (128), 50 states have internal predecessors, (128), 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 05:58:36,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:58:36,567 INFO L93 Difference]: Finished difference Result 685 states and 747 transitions. [2024-11-14 05:58:36,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-11-14 05:58:36,568 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.56) internal successors, (128), 50 states have internal predecessors, (128), 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 59 [2024-11-14 05:58:36,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:58:36,570 INFO L225 Difference]: With dead ends: 685 [2024-11-14 05:58:36,570 INFO L226 Difference]: Without dead ends: 675 [2024-11-14 05:58:36,570 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 134 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=313, Invalid=6728, Unknown=119, NotChecked=850, Total=8010 [2024-11-14 05:58:36,571 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 2312 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 3097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 777 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:58:36,571 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 852 Invalid, 3097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2312 Invalid, 0 Unknown, 777 Unchecked, 3.4s Time] [2024-11-14 05:58:36,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2024-11-14 05:58:36,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 572. [2024-11-14 05:58:36,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 568 states have (on average 1.1144366197183098) internal successors, (633), 571 states have internal predecessors, (633), 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 05:58:36,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 633 transitions. [2024-11-14 05:58:36,577 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 633 transitions. Word has length 59 [2024-11-14 05:58:36,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:58:36,577 INFO L471 AbstractCegarLoop]: Abstraction has 572 states and 633 transitions. [2024-11-14 05:58:36,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.56) internal successors, (128), 50 states have internal predecessors, (128), 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 05:58:36,577 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 633 transitions. [2024-11-14 05:58:36,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-14 05:58:36,578 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:58:36,578 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:58:36,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-11-14 05:58:36,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2024-11-14 05:58:36,779 INFO L396 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 05:58:36,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:58:36,780 INFO L85 PathProgramCache]: Analyzing trace with hash 514120176, now seen corresponding path program 20 times [2024-11-14 05:58:36,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:58:36,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468301717] [2024-11-14 05:58:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:58:36,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:58:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:58:38,810 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 12 proven. 103 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:58:38,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:58:38,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468301717] [2024-11-14 05:58:38,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468301717] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:58:38,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499374529] [2024-11-14 05:58:38,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:58:38,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:58:38,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:58:38,813 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:58:38,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12309dc8-81c7-47a4-b1b1-363b4e527b59/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-11-14 05:58:39,288 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-14 05:58:39,288 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:58:39,293 INFO L255 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 112 conjuncts are in the unsatisfiable core [2024-11-14 05:58:39,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:58:39,306 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 05:58:39,311 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 05:58:39,318 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 05:58:40,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2024-11-14 05:58:40,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2024-11-14 05:58:41,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2024-11-14 05:58:41,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2024-11-14 05:59:08,088 INFO L349 Elim1Store]: treesize reduction 16, result has 89.1 percent of original size [2024-11-14 05:59:08,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 153 [2024-11-14 05:59:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 27 proven. 67 refuted. 1 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 05:59:09,937 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:59:27,910 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2963 (Array Int Int)) (v_ArrVal_2962 (Array Int Int)) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_590| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_592| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_594| Int) (|v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_860| Int)) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_2962) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2963) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (or (< (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_594| 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_592|) (< (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_594|) (= (select .cse0 (+ (- 1) |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_860|)) 0) (= (select .cse0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_592|) 0) (< |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_860| (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (= (select .cse0 (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0) (< (+ 2 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_590|) |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_860|) (< (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_592| 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_590|) (< |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_860| 1) (= (select .cse0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_590|) 0) (= (select .cse0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_594|) 0)))) is different from false [2024-11-14 05:59:38,599 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2963 (Array Int Int)) (|v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_866| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_590| Int) (v_ArrVal_2961 (Array Int Int)) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_592| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_594| Int) (|v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_860| Int)) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_2961) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_2963) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (or (< (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_594| 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_592|) (< |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_860| (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (< (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1) |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_866|) (< (+ 2 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_590|) |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_860|) (< (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_592| 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_590|) (< |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_860| 1) (< (+ 2 |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_866|) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_594|) (= (select .cse0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_590|) 0) (= (select .cse0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_592|) 0) (= (select .cse0 (+ (- 1) |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_860|)) 0) (= (select .cse0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_594|) 0) (= (select .cse0 (+ |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_866| 1)) 0)))) is different from false [2024-11-14 05:59:42,177 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:59:42,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 66 [2024-11-14 05:59:42,458 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:59:42,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 125 treesize of output 246 [2024-11-14 05:59:42,670 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:59:42,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 50 treesize of output 130 [2024-11-14 05:59:46,714 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 1 proven. 92 refuted. 0 times theorem prover too weak. 24 trivial. 2 not checked. [2024-11-14 05:59:46,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499374529] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:59:46,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [921301628] [2024-11-14 05:59:46,715 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 05:59:46,715 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:59:46,716 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:59:46,716 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:59:46,716 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:59:47,463 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:59:58,540 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '49081#(exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_602| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_597| Int)) (and (or (< |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_602| 0) (< (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_597|) (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_602| 1))) (or (and (exists ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_410| Int) (|v_#memory_int_1208| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_467| Int)) (and (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_410| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_467|)) (= |#memory_int| (store |v_#memory_int_1208| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_467| (store (select |v_#memory_int_1208| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_467|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_410| 0))) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_467|) 1) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_410|))) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_410| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_410| 4294967296) 0)) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_602| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_597|) 1) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_431| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_431| 4294967296) 0)) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_602|) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_597| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_99| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_99| 4294967296) 0))) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_597|) (+ (- 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_602|)) 0)) (<= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_602| (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_597|))) (and (exists ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_410| Int) (|v_#memory_int_1208| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_467| Int)) (and (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_410| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_467|)) (= |#memory_int| (store |v_#memory_int_1208| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_467| (store (select |v_#memory_int_1208| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_467|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_410| 0))) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_467|) 1) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_410|))) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_410| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_410| 4294967296) 0)) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_602| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_431| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_431| 4294967296) 0)) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_597| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_99| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_99| 4294967296) 0)))))))' at error location [2024-11-14 05:59:58,540 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:59:58,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:59:58,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29, 29] total 85 [2024-11-14 05:59:58,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032681568] [2024-11-14 05:59:58,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:59:58,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-14 05:59:58,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:59:58,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-14 05:59:58,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=589, Invalid=8684, Unknown=47, NotChecked=382, Total=9702 [2024-11-14 05:59:58,542 INFO L87 Difference]: Start difference. First operand 572 states and 633 transitions. Second operand has 86 states, 86 states have (on average 1.8255813953488371) internal successors, (157), 85 states have internal predecessors, (157), 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 06:00:09,082 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 06:00:11,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:00:14,191 WARN L539 Checker$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 06:00:16,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:00:18,259 WARN L539 Checker$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 06:00:20,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:00:25,479 WARN L539 Checker$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 06:00:27,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:00:34,788 WARN L539 Checker$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 06:00:42,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:00:44,003 WARN L539 Checker$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 06:00:51,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:01:00,481 WARN L539 Checker$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 06:01:02,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:01:04,495 WARN L539 Checker$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 06:01:06,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:01:23,011 WARN L539 Checker$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 06:01:27,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:01:34,136 WARN L539 Checker$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 06:01:36,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:01:47,430 WARN L539 Checker$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 06:01:51,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 06:01:53,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]