./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire --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 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:23:49,716 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:23:49,827 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-23 21:23:49,835 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:23:49,836 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:23:49,881 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:23:49,882 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:23:49,883 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:23:49,884 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:23:49,889 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:23:49,890 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:23:49,891 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:23:49,892 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:23:49,893 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:23:49,894 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:23:49,895 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:23:49,895 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:23:49,896 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:23:49,896 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:23:49,897 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:23:49,897 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:23:49,898 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:23:49,898 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:23:49,899 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:23:49,899 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:23:49,900 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:23:49,900 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:23:49,901 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:23:49,901 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:23:49,902 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 21:23:49,902 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 21:23:49,903 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 21:23:49,903 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:23:49,903 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 21:23:49,904 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:23:49,904 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:23:49,904 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:23:49,904 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:23:49,905 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:23:49,905 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:23:49,905 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:23:49,906 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:23:49,906 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:23:49,906 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:23:49,907 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:23:49,907 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:23:49,907 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:23:49,907 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:23:49,908 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 [2023-11-23 21:23:50,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:23:50,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:23:50,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:23:50,250 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:23:50,251 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:23:50,252 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2023-11-23 21:23:53,299 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:23:53,500 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:23:53,501 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2023-11-23 21:23:53,509 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/data/d283c320d/5b8e51f5d56a42299bbdb26271401bbb/FLAGbc13a17c5 [2023-11-23 21:23:53,530 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/data/d283c320d/5b8e51f5d56a42299bbdb26271401bbb [2023-11-23 21:23:53,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:23:53,542 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:23:53,547 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:23:53,547 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:23:53,553 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:23:53,553 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:23:53" (1/1) ... [2023-11-23 21:23:53,554 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68d051f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:53, skipping insertion in model container [2023-11-23 21:23:53,555 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:23:53" (1/1) ... [2023-11-23 21:23:53,579 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:23:53,781 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:23:53,794 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:23:53,812 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:23:53,825 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:23:53,826 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:53 WrapperNode [2023-11-23 21:23:53,826 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:23:53,827 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:23:53,827 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:23:53,827 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:23:53,836 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:53" (1/1) ... [2023-11-23 21:23:53,843 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:53" (1/1) ... [2023-11-23 21:23:53,864 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2023-11-23 21:23:53,865 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:23:53,866 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:23:53,866 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:23:53,866 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:23:53,876 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:53" (1/1) ... [2023-11-23 21:23:53,876 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:53" (1/1) ... [2023-11-23 21:23:53,891 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:53" (1/1) ... [2023-11-23 21:23:53,892 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:53" (1/1) ... [2023-11-23 21:23:53,897 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:53" (1/1) ... [2023-11-23 21:23:53,901 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:53" (1/1) ... [2023-11-23 21:23:53,902 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:53" (1/1) ... [2023-11-23 21:23:53,903 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:53" (1/1) ... [2023-11-23 21:23:53,905 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:23:53,909 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:23:53,910 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:23:53,910 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:23:53,911 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:53" (1/1) ... [2023-11-23 21:23:53,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:23:53,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:53,948 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:23:53,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:23:53,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:23:53,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:23:53,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:23:53,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:23:53,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:23:53,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:23:54,064 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:23:54,067 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:23:54,253 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:23:54,308 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:23:54,308 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-23 21:23:54,310 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:54 BoogieIcfgContainer [2023-11-23 21:23:54,310 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:23:54,313 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:23:54,313 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:23:54,322 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:23:54,322 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:23:53" (1/3) ... [2023-11-23 21:23:54,323 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a889d9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:54, skipping insertion in model container [2023-11-23 21:23:54,324 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:53" (2/3) ... [2023-11-23 21:23:54,324 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a889d9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:54, skipping insertion in model container [2023-11-23 21:23:54,324 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:54" (3/3) ... [2023-11-23 21:23:54,326 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-write.c [2023-11-23 21:23:54,345 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:23:54,345 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-23 21:23:54,395 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:23:54,403 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@13c8c1b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:23:54,403 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-23 21:23:54,407 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 10 states have (on average 2.2) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:54,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-23 21:23:54,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:54,416 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-23 21:23:54,417 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:23:54,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:54,426 INFO L85 PathProgramCache]: Analyzing trace with hash 3182528, now seen corresponding path program 1 times [2023-11-23 21:23:54,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:54,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671158452] [2023-11-23 21:23:54,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:54,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:54,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:54,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:54,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671158452] [2023-11-23 21:23:54,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671158452] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:54,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:54,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:23:54,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381541139] [2023-11-23 21:23:54,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:54,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:23:54,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:54,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:23:54,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:54,873 INFO L87 Difference]: Start difference. First operand has 19 states, 10 states have (on average 2.2) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) 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) [2023-11-23 21:23:54,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:54,942 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2023-11-23 21:23:54,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:23:54,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) 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 [2023-11-23 21:23:54,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:54,953 INFO L225 Difference]: With dead ends: 36 [2023-11-23 21:23:54,953 INFO L226 Difference]: Without dead ends: 35 [2023-11-23 21:23:54,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:54,959 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:54,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 16 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:23:54,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-23 21:23:54,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2023-11-23 21:23:54,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:54,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-11-23 21:23:54,994 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2023-11-23 21:23:54,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:54,994 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-11-23 21:23:54,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) 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) [2023-11-23 21:23:54,995 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-11-23 21:23:54,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-23 21:23:54,995 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:54,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-23 21:23:54,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:23:54,997 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:23:54,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:54,998 INFO L85 PathProgramCache]: Analyzing trace with hash 3108451, now seen corresponding path program 1 times [2023-11-23 21:23:54,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:54,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94273522] [2023-11-23 21:23:54,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:54,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:55,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:55,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:55,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94273522] [2023-11-23 21:23:55,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94273522] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:55,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:55,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:23:55,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56835082] [2023-11-23 21:23:55,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:55,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:23:55,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:55,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:23:55,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:55,077 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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) [2023-11-23 21:23:55,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:55,111 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-11-23 21:23:55,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:23:55,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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 [2023-11-23 21:23:55,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:55,113 INFO L225 Difference]: With dead ends: 25 [2023-11-23 21:23:55,113 INFO L226 Difference]: Without dead ends: 25 [2023-11-23 21:23:55,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:55,116 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:55,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:23:55,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-23 21:23:55,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2023-11-23 21:23:55,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:55,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-11-23 21:23:55,121 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 4 [2023-11-23 21:23:55,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:55,122 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-11-23 21:23:55,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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) [2023-11-23 21:23:55,122 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-11-23 21:23:55,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-23 21:23:55,123 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:55,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-23 21:23:55,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:23:55,124 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:23:55,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:55,125 INFO L85 PathProgramCache]: Analyzing trace with hash 3110481, now seen corresponding path program 1 times [2023-11-23 21:23:55,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:55,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18186985] [2023-11-23 21:23:55,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:55,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:55,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:55,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18186985] [2023-11-23 21:23:55,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18186985] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:55,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:55,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:23:55,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223259371] [2023-11-23 21:23:55,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:55,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:23:55,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:55,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:23:55,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:23:55,299 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 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) [2023-11-23 21:23:55,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:55,374 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2023-11-23 21:23:55,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:23:55,375 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 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 [2023-11-23 21:23:55,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:55,376 INFO L225 Difference]: With dead ends: 42 [2023-11-23 21:23:55,377 INFO L226 Difference]: Without dead ends: 42 [2023-11-23 21:23:55,377 INFO L412 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 [2023-11-23 21:23:55,379 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 17 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 [2023-11-23 21:23:55,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 17 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:23:55,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-23 21:23:55,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 23. [2023-11-23 21:23:55,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.8) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:55,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-23 21:23:55,386 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 4 [2023-11-23 21:23:55,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:55,386 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-23 21:23:55,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 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) [2023-11-23 21:23:55,387 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-23 21:23:55,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 21:23:55,388 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:55,388 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 21:23:55,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:23:55,389 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:23:55,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:55,390 INFO L85 PathProgramCache]: Analyzing trace with hash 96362034, now seen corresponding path program 1 times [2023-11-23 21:23:55,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:55,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210987858] [2023-11-23 21:23:55,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:55,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:55,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:55,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:55,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210987858] [2023-11-23 21:23:55,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210987858] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:55,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:55,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:23:55,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252168384] [2023-11-23 21:23:55,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:55,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:23:55,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:55,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:23:55,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:23:55,509 INFO L87 Difference]: Start difference. First operand 23 states and 27 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) [2023-11-23 21:23:55,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:55,555 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2023-11-23 21:23:55,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:23:55,556 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 [2023-11-23 21:23:55,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:55,557 INFO L225 Difference]: With dead ends: 22 [2023-11-23 21:23:55,557 INFO L226 Difference]: Without dead ends: 22 [2023-11-23 21:23:55,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:23:55,559 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:55,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 10 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:23:55,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-23 21:23:55,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-23 21:23:55,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:55,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-11-23 21:23:55,565 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 5 [2023-11-23 21:23:55,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:55,565 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-11-23 21:23:55,566 INFO L496 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) [2023-11-23 21:23:55,566 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-11-23 21:23:55,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 21:23:55,566 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:55,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 21:23:55,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:23:55,567 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:23:55,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:55,570 INFO L85 PathProgramCache]: Analyzing trace with hash 96362035, now seen corresponding path program 1 times [2023-11-23 21:23:55,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:55,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125770980] [2023-11-23 21:23:55,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:55,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:55,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:55,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125770980] [2023-11-23 21:23:55,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125770980] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:55,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:55,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:23:55,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103591091] [2023-11-23 21:23:55,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:55,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:23:55,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:55,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:23:55,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:23:55,803 INFO L87 Difference]: Start difference. First operand 22 states and 26 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) [2023-11-23 21:23:55,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:55,860 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2023-11-23 21:23:55,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:23:55,861 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 [2023-11-23 21:23:55,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:55,862 INFO L225 Difference]: With dead ends: 23 [2023-11-23 21:23:55,862 INFO L226 Difference]: Without dead ends: 23 [2023-11-23 21:23:55,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:23:55,864 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:55,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 10 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:23:55,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-23 21:23:55,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-23 21:23:55,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.6875) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:55,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-23 21:23:55,869 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 5 [2023-11-23 21:23:55,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:55,869 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-23 21:23:55,869 INFO L496 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) [2023-11-23 21:23:55,870 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-23 21:23:55,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 21:23:55,870 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:55,870 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-23 21:23:55,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:23:55,871 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:23:55,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:55,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1885310484, now seen corresponding path program 1 times [2023-11-23 21:23:55,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:55,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145190814] [2023-11-23 21:23:55,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:55,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:55,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:55,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:55,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145190814] [2023-11-23 21:23:55,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145190814] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:23:55,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053400952] [2023-11-23 21:23:55,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:55,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:55,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:55,954 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:55,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:23:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:56,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:23:56,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:56,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:23:56,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:56,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053400952] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:23:56,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1508492075] [2023-11-23 21:23:56,154 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-11-23 21:23:56,155 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:23:56,160 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:23:56,192 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:23:56,206 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:23:57,001 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:23:57,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1508492075] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:57,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:23:57,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 9 [2023-11-23 21:23:57,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872469870] [2023-11-23 21:23:57,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:57,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:23:57,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:57,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:23:57,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:23:57,299 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:57,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:57,610 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2023-11-23 21:23:57,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:23:57,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-23 21:23:57,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:57,612 INFO L225 Difference]: With dead ends: 30 [2023-11-23 21:23:57,612 INFO L226 Difference]: Without dead ends: 30 [2023-11-23 21:23:57,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:23:57,621 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 8 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:57,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 13 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:23:57,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-23 21:23:57,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2023-11-23 21:23:57,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:57,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-11-23 21:23:57,634 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 7 [2023-11-23 21:23:57,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:57,635 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-11-23 21:23:57,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:57,635 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-11-23 21:23:57,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 21:23:57,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:57,636 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-23 21:23:57,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 21:23:57,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 21:23:57,856 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:23:57,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:57,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1684917194, now seen corresponding path program 1 times [2023-11-23 21:23:57,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:57,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092105248] [2023-11-23 21:23:57,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:57,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:57,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:57,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:57,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092105248] [2023-11-23 21:23:57,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092105248] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:23:57,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135991980] [2023-11-23 21:23:57,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:57,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:57,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:57,974 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:57,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:23:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:58,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 21:23:58,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:58,074 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 [2023-11-23 21:23:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:58,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:23:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:58,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135991980] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:23:58,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1273099037] [2023-11-23 21:23:58,225 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-11-23 21:23:58,225 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:23:58,225 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:23:58,225 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:23:58,225 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:23:58,627 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:23:59,117 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '466#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 2 |ULTIMATE.start_foo_~b#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#mask~0#1.base|) (<= |ULTIMATE.start_foo_~i~0#1| 1) (= |ULTIMATE.start_foo_~b#1.offset| 0) (= |ULTIMATE.start_foo_#in~size#1| 1) (<= (select |#length| |ULTIMATE.start_foo_~b#1.base|) |ULTIMATE.start_foo_~i~0#1|) (<= 2 |ULTIMATE.start_foo_#in~b#1.base|) (= |ULTIMATE.start_foo_~size#1| 1) (<= 0 |ULTIMATE.start_foo_~i~0#1|))' at error location [2023-11-23 21:23:59,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:23:59,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:23:59,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2023-11-23 21:23:59,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003686736] [2023-11-23 21:23:59,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:23:59,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 21:23:59,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:59,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 21:23:59,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-11-23 21:23:59,120 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:59,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:59,276 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2023-11-23 21:23:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:23:59,277 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-23 21:23:59,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:59,278 INFO L225 Difference]: With dead ends: 49 [2023-11-23 21:23:59,278 INFO L226 Difference]: Without dead ends: 49 [2023-11-23 21:23:59,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-11-23 21:23:59,280 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 69 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:59,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 18 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:23:59,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-23 21:23:59,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2023-11-23 21:23:59,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.525) internal successors, (61), 46 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) [2023-11-23 21:23:59,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2023-11-23 21:23:59,286 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 8 [2023-11-23 21:23:59,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:59,286 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2023-11-23 21:23:59,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:59,287 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2023-11-23 21:23:59,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:23:59,287 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:59,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:59,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:23:59,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 21:23:59,488 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:23:59,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:59,489 INFO L85 PathProgramCache]: Analyzing trace with hash 64570769, now seen corresponding path program 1 times [2023-11-23 21:23:59,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:59,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234541518] [2023-11-23 21:23:59,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:59,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:59,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:23:59,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:59,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234541518] [2023-11-23 21:23:59,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234541518] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:59,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:59,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:23:59,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308147122] [2023-11-23 21:23:59,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:59,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:23:59,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:59,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:23:59,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:59,537 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2023-11-23 21:23:59,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:59,557 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2023-11-23 21:23:59,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:23:59,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 [2023-11-23 21:23:59,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:59,562 INFO L225 Difference]: With dead ends: 45 [2023-11-23 21:23:59,562 INFO L226 Difference]: Without dead ends: 45 [2023-11-23 21:23:59,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:59,564 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:59,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 7 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:23:59,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-23 21:23:59,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-23 21:23:59,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.475) internal successors, (59), 44 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) [2023-11-23 21:23:59,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2023-11-23 21:23:59,581 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 10 [2023-11-23 21:23:59,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:59,581 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2023-11-23 21:23:59,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2023-11-23 21:23:59,582 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2023-11-23 21:23:59,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:23:59,582 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:59,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:59,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:23:59,583 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:23:59,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:59,585 INFO L85 PathProgramCache]: Analyzing trace with hash 64570770, now seen corresponding path program 1 times [2023-11-23 21:23:59,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:59,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008965667] [2023-11-23 21:23:59,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:59,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:59,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:59,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:23:59,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:59,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008965667] [2023-11-23 21:23:59,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008965667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:23:59,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195820062] [2023-11-23 21:23:59,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:59,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:59,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:59,686 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:59,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:23:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:59,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:23:59,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:59,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:59,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:23:59,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:59,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195820062] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:23:59,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [38629415] [2023-11-23 21:23:59,848 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-23 21:23:59,848 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:23:59,848 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:23:59,848 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:23:59,849 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:24:00,496 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:24:00,811 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '731#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~1#1| 0) (<= (select |#length| |ULTIMATE.start_main_~#b~0#1.base|) 3) (exists ((|v_ULTIMATE.start_main_~i~1#1_47| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 32 (mod |v_ULTIMATE.start_main_~i~1#1_47| 4294967296)) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |v_ULTIMATE.start_main_~i~1#1_47|))))' at error location [2023-11-23 21:24:00,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:24:00,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:24:00,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 9 [2023-11-23 21:24:00,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428448708] [2023-11-23 21:24:00,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:24:00,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 21:24:00,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:00,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 21:24:00,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-11-23 21:24:00,814 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:24:01,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:01,025 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2023-11-23 21:24:01,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:24:01,026 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 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 [2023-11-23 21:24:01,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:01,026 INFO L225 Difference]: With dead ends: 48 [2023-11-23 21:24:01,027 INFO L226 Difference]: Without dead ends: 48 [2023-11-23 21:24:01,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2023-11-23 21:24:01,028 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 76 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:01,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 7 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:24:01,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-23 21:24:01,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2023-11-23 21:24:01,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 45 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) [2023-11-23 21:24:01,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2023-11-23 21:24:01,033 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 10 [2023-11-23 21:24:01,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:01,033 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2023-11-23 21:24:01,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:24:01,033 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2023-11-23 21:24:01,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 21:24:01,034 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:01,034 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:01,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:01,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-23 21:24:01,251 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:24:01,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:01,251 INFO L85 PathProgramCache]: Analyzing trace with hash 654021878, now seen corresponding path program 1 times [2023-11-23 21:24:01,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:01,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492116771] [2023-11-23 21:24:01,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:01,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:24:01,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:01,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492116771] [2023-11-23 21:24:01,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492116771] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:01,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820061957] [2023-11-23 21:24:01,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:01,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:01,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:01,369 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:01,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:24:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:01,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 21:24:01,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:24:01,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:24:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:24:01,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820061957] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:24:01,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [357204219] [2023-11-23 21:24:01,563 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-23 21:24:01,563 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:24:01,564 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:24:01,564 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:24:01,564 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:24:02,377 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:24:03,576 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '942#(and (= |ULTIMATE.start_main_~i~1#1| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |ULTIMATE.start_main_#res#1| 1) (exists ((|v_#valid_44| (Array Int Int)) (|v_ULTIMATE.start_main_~#b~0#1.offset_25| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_21| Int) (|v_ULTIMATE.start_main_~#mask~0#1.offset_18| Int) (|v_ULTIMATE.start_main_~#b~0#1.base_30| Int) (|v_ULTIMATE.start_main_~i~1#1_54| Int)) (and (<= 1 |#StackHeapBarrier|) (= (select |v_#valid_44| |v_ULTIMATE.start_main_~#b~0#1.base_30|) 1) (<= 32 (mod |v_ULTIMATE.start_main_~i~1#1_54| 4294967296)) (= |#valid| (store (store |v_#valid_44| |v_ULTIMATE.start_main_~#b~0#1.base_30| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_21| 0)) (<= 4 (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_30|)) (= |v_ULTIMATE.start_main_~#b~0#1.offset_25| 0) (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_30|) 0) 1)) (<= 2 |v_ULTIMATE.start_main_~#b~0#1.base_30|) (= |v_ULTIMATE.start_main_~#mask~0#1.offset_18| 0) (<= 0 |v_ULTIMATE.start_main_~i~1#1_54|) (<= 2 |v_ULTIMATE.start_main_~#mask~0#1.base_21|))))' at error location [2023-11-23 21:24:03,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:24:03,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:24:03,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2023-11-23 21:24:03,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061540851] [2023-11-23 21:24:03,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:24:03,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 21:24:03,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:03,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 21:24:03,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=312, Unknown=1, NotChecked=0, Total=420 [2023-11-23 21:24:03,578 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:24:03,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:03,774 INFO L93 Difference]: Finished difference Result 106 states and 125 transitions. [2023-11-23 21:24:03,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 21:24:03,775 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 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 [2023-11-23 21:24:03,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:03,776 INFO L225 Difference]: With dead ends: 106 [2023-11-23 21:24:03,776 INFO L226 Difference]: Without dead ends: 106 [2023-11-23 21:24:03,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=162, Invalid=437, Unknown=1, NotChecked=0, Total=600 [2023-11-23 21:24:03,777 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 85 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:03,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 25 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:24:03,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-23 21:24:03,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2023-11-23 21:24:03,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 88 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:24:03,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 121 transitions. [2023-11-23 21:24:03,784 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 121 transitions. Word has length 15 [2023-11-23 21:24:03,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:03,784 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 121 transitions. [2023-11-23 21:24:03,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:24:03,784 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 121 transitions. [2023-11-23 21:24:03,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 21:24:03,785 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:03,785 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1] [2023-11-23 21:24:03,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:04,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 21:24:04,006 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:24:04,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:04,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1303154829, now seen corresponding path program 2 times [2023-11-23 21:24:04,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:04,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127667240] [2023-11-23 21:24:04,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:04,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:04,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:24:04,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:04,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127667240] [2023-11-23 21:24:04,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127667240] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:04,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061926893] [2023-11-23 21:24:04,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:24:04,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:04,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:04,178 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:04,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:24:04,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 21:24:04,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:24:04,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 21:24:04,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:04,250 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 [2023-11-23 21:24:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:24:04,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:24:04,589 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:24:04,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061926893] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:24:04,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [293497511] [2023-11-23 21:24:04,592 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-11-23 21:24:04,592 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:24:04,593 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:24:04,593 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:24:04,593 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:24:04,905 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:24:05,559 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1266#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 2 |ULTIMATE.start_foo_~b#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#mask~0#1.base|) (<= |ULTIMATE.start_foo_~i~0#1| 1) (= |ULTIMATE.start_foo_~b#1.offset| 0) (= |ULTIMATE.start_foo_#in~size#1| 1) (<= (select |#length| |ULTIMATE.start_foo_~b#1.base|) |ULTIMATE.start_foo_~i~0#1|) (<= 2 |ULTIMATE.start_foo_#in~b#1.base|) (= |ULTIMATE.start_foo_~size#1| 1) (<= 0 |ULTIMATE.start_foo_~i~0#1|))' at error location [2023-11-23 21:24:05,559 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:24:05,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:24:05,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 15 [2023-11-23 21:24:05,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230562014] [2023-11-23 21:24:05,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:24:05,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 21:24:05,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:05,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 21:24:05,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-11-23 21:24:05,561 INFO L87 Difference]: Start difference. First operand 89 states and 121 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:24:05,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:05,862 INFO L93 Difference]: Finished difference Result 85 states and 109 transitions. [2023-11-23 21:24:05,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:24:05,862 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-23 21:24:05,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:05,863 INFO L225 Difference]: With dead ends: 85 [2023-11-23 21:24:05,863 INFO L226 Difference]: Without dead ends: 85 [2023-11-23 21:24:05,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2023-11-23 21:24:05,864 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:05,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 22 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:24:05,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-23 21:24:05,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2023-11-23 21:24:05,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.4057971014492754) internal successors, (97), 73 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) [2023-11-23 21:24:05,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2023-11-23 21:24:05,869 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 17 [2023-11-23 21:24:05,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:05,869 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2023-11-23 21:24:05,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:24:05,870 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2023-11-23 21:24:05,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:24:05,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:05,874 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1] [2023-11-23 21:24:05,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:06,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 21:24:06,075 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:24:06,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:06,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1686549522, now seen corresponding path program 1 times [2023-11-23 21:24:06,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:06,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194074509] [2023-11-23 21:24:06,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:06,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:24:06,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:06,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194074509] [2023-11-23 21:24:06,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194074509] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:06,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132630029] [2023-11-23 21:24:06,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:06,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:06,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:06,200 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:06,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:24:06,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:06,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:24:06,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:24:06,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:24:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:24:06,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132630029] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:24:06,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [762127760] [2023-11-23 21:24:06,340 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-23 21:24:06,340 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:24:06,341 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:24:06,345 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:24:06,345 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:24:07,367 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:24:07,432 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1560#(and (<= 32 (mod |ULTIMATE.start_foo_~i~0#1| 4294967296)) (<= |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= 0 |ULTIMATE.start_foo_~i~0#1|))' at error location [2023-11-23 21:24:07,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:24:07,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:24:07,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-23 21:24:07,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297894994] [2023-11-23 21:24:07,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:24:07,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:24:07,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:07,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:24:07,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:24:07,435 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:24:07,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:07,539 INFO L93 Difference]: Finished difference Result 97 states and 125 transitions. [2023-11-23 21:24:07,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:24:07,539 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-23 21:24:07,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:07,540 INFO L225 Difference]: With dead ends: 97 [2023-11-23 21:24:07,540 INFO L226 Difference]: Without dead ends: 97 [2023-11-23 21:24:07,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-11-23 21:24:07,541 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:07,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:24:07,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-23 21:24:07,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2023-11-23 21:24:07,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.3736263736263736) internal successors, (125), 95 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) [2023-11-23 21:24:07,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 125 transitions. [2023-11-23 21:24:07,549 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 125 transitions. Word has length 19 [2023-11-23 21:24:07,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:07,549 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 125 transitions. [2023-11-23 21:24:07,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:24:07,550 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 125 transitions. [2023-11-23 21:24:07,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:24:07,551 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:07,551 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1] [2023-11-23 21:24:07,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:07,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 21:24:07,762 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:24:07,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:07,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1686547491, now seen corresponding path program 1 times [2023-11-23 21:24:07,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:07,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961654445] [2023-11-23 21:24:07,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:07,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:24:07,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:07,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961654445] [2023-11-23 21:24:07,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961654445] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:07,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280645599] [2023-11-23 21:24:07,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:07,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:07,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:07,983 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:08,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:24:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:08,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:24:08,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:08,148 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:24:08,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:24:08,228 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:24:08,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280645599] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:24:08,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [440489484] [2023-11-23 21:24:08,230 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-23 21:24:08,231 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:24:08,231 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:24:08,231 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:24:08,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:24:09,091 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:24:09,184 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1886#(and (<= 0 |ULTIMATE.start_foo_#res#1|) (= |ULTIMATE.start_main_#t~ret3#1| |ULTIMATE.start_foo_#res#1|) (or (< (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)) 0) (< (select |#length| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4))) (<= |ULTIMATE.start_main_#t~ret3#1| 2147483647))' at error location [2023-11-23 21:24:09,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:24:09,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:24:09,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-11-23 21:24:09,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923001595] [2023-11-23 21:24:09,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:24:09,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 21:24:09,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:09,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 21:24:09,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-11-23 21:24:09,187 INFO L87 Difference]: Start difference. First operand 96 states and 125 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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) [2023-11-23 21:24:09,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:09,355 INFO L93 Difference]: Finished difference Result 98 states and 123 transitions. [2023-11-23 21:24:09,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:24:09,356 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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) Word has length 19 [2023-11-23 21:24:09,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:09,357 INFO L225 Difference]: With dead ends: 98 [2023-11-23 21:24:09,357 INFO L226 Difference]: Without dead ends: 98 [2023-11-23 21:24:09,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2023-11-23 21:24:09,358 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 37 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:09,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 9 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:24:09,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-23 21:24:09,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2023-11-23 21:24:09,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.3406593406593406) internal successors, (122), 95 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:24:09,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 122 transitions. [2023-11-23 21:24:09,363 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 122 transitions. Word has length 19 [2023-11-23 21:24:09,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:09,364 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 122 transitions. [2023-11-23 21:24:09,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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) [2023-11-23 21:24:09,364 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 122 transitions. [2023-11-23 21:24:09,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-23 21:24:09,365 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:09,365 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1] [2023-11-23 21:24:09,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:09,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 21:24:09,566 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:24:09,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:09,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1469272976, now seen corresponding path program 2 times [2023-11-23 21:24:09,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:09,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485267739] [2023-11-23 21:24:09,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:09,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-23 21:24:09,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:09,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485267739] [2023-11-23 21:24:09,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485267739] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:09,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31701151] [2023-11-23 21:24:09,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:24:09,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:09,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:09,866 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:09,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 21:24:09,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 21:24:09,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:24:09,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 21:24:09,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:09,951 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 [2023-11-23 21:24:09,959 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 [2023-11-23 21:24:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-23 21:24:10,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:24:10,257 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-23 21:24:10,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31701151] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:24:10,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [575587530] [2023-11-23 21:24:10,259 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-23 21:24:10,260 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:24:10,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:24:10,260 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:24:10,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:24:11,444 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:24:11,534 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2232#(and (<= 0 |ULTIMATE.start_foo_#res#1|) (= |ULTIMATE.start_main_#t~ret3#1| |ULTIMATE.start_foo_#res#1|) (or (< (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)) 0) (< (select |#length| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4))) (<= |ULTIMATE.start_main_#t~ret3#1| 2147483647))' at error location [2023-11-23 21:24:11,535 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:24:11,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:24:11,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 2] total 9 [2023-11-23 21:24:11,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770310262] [2023-11-23 21:24:11,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:24:11,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 21:24:11,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:11,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 21:24:11,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-11-23 21:24:11,536 INFO L87 Difference]: Start difference. First operand 96 states and 122 transitions. Second operand has 11 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2023-11-23 21:24:11,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:11,653 INFO L93 Difference]: Finished difference Result 122 states and 148 transitions. [2023-11-23 21:24:11,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:24:11,653 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.9) internal successors, (39), 10 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) Word has length 22 [2023-11-23 21:24:11,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:11,655 INFO L225 Difference]: With dead ends: 122 [2023-11-23 21:24:11,655 INFO L226 Difference]: Without dead ends: 122 [2023-11-23 21:24:11,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:24:11,656 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:11,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 29 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:24:11,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-23 21:24:11,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2023-11-23 21:24:11,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.3214285714285714) internal successors, (148), 116 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:24:11,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 148 transitions. [2023-11-23 21:24:11,661 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 148 transitions. Word has length 22 [2023-11-23 21:24:11,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:11,661 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 148 transitions. [2023-11-23 21:24:11,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2023-11-23 21:24:11,661 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 148 transitions. [2023-11-23 21:24:11,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-23 21:24:11,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:11,663 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 1, 1, 1, 1] [2023-11-23 21:24:11,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:11,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 21:24:11,864 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:24:11,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:11,864 INFO L85 PathProgramCache]: Analyzing trace with hash -476177874, now seen corresponding path program 2 times [2023-11-23 21:24:11,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:11,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951570409] [2023-11-23 21:24:11,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:11,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:12,174 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 43 proven. 62 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:24:12,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:12,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951570409] [2023-11-23 21:24:12,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951570409] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:12,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214738486] [2023-11-23 21:24:12,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:24:12,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:12,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:12,176 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:12,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 21:24:12,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 21:24:12,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:24:12,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 21:24:12,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:12,439 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-23 21:24:12,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:24:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-23 21:24:12,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214738486] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:24:12,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1826141935] [2023-11-23 21:24:12,959 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-23 21:24:12,959 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:24:12,959 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:24:12,959 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:24:12,959 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:24:13,813 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:24:14,187 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2682#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_foo_#in~size#1|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 2 |ULTIMATE.start_foo_~b#1.base|) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#mask~0#1.base|) (= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 32 (mod |ULTIMATE.start_foo_~i~0#1| 4294967296)) (<= |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= 2 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~i~0#1|))' at error location [2023-11-23 21:24:14,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:24:14,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:24:14,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 21 [2023-11-23 21:24:14,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727739666] [2023-11-23 21:24:14,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:24:14,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-23 21:24:14,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:14,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-23 21:24:14,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2023-11-23 21:24:14,189 INFO L87 Difference]: Start difference. First operand 117 states and 148 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:24:14,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:14,711 INFO L93 Difference]: Finished difference Result 114 states and 133 transitions. [2023-11-23 21:24:14,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-23 21:24:14,712 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-23 21:24:14,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:14,712 INFO L225 Difference]: With dead ends: 114 [2023-11-23 21:24:14,713 INFO L226 Difference]: Without dead ends: 114 [2023-11-23 21:24:14,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=298, Invalid=1342, Unknown=0, NotChecked=0, Total=1640 [2023-11-23 21:24:14,714 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 60 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:14,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 26 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:24:14,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-23 21:24:14,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2023-11-23 21:24:14,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.25) internal successors, (115), 96 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:24:14,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 115 transitions. [2023-11-23 21:24:14,718 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 115 transitions. Word has length 31 [2023-11-23 21:24:14,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:14,718 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 115 transitions. [2023-11-23 21:24:14,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:24:14,719 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 115 transitions. [2023-11-23 21:24:14,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-23 21:24:14,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:14,720 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 3, 2, 2, 1, 1] [2023-11-23 21:24:14,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:14,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 21:24:14,942 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:24:14,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:14,943 INFO L85 PathProgramCache]: Analyzing trace with hash 901731750, now seen corresponding path program 1 times [2023-11-23 21:24:14,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:14,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431347317] [2023-11-23 21:24:14,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:14,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 88 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:24:15,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:15,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431347317] [2023-11-23 21:24:15,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431347317] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:15,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29948464] [2023-11-23 21:24:15,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:15,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:15,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:15,282 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:15,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 21:24:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:15,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 21:24:15,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:15,527 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 40 proven. 103 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-23 21:24:15,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:24:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 40 proven. 103 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-23 21:24:15,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29948464] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:24:15,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [356850234] [2023-11-23 21:24:15,655 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-23 21:24:15,655 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:24:15,655 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:24:15,655 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:24:15,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:24:16,557 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:24:16,673 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3167#(and (or (< (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset|) 0) (< (select |#length| |ULTIMATE.start_foo_~b#1.base|) (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1))) (<= (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 31) (<= |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= 0 |ULTIMATE.start_foo_~i~0#1|))' at error location [2023-11-23 21:24:16,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:24:16,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:24:16,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 20 [2023-11-23 21:24:16,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423061393] [2023-11-23 21:24:16,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:24:16,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 21:24:16,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:16,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 21:24:16,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2023-11-23 21:24:16,675 INFO L87 Difference]: Start difference. First operand 97 states and 115 transitions. Second operand has 20 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) [2023-11-23 21:24:17,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:17,117 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2023-11-23 21:24:17,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-23 21:24:17,118 INFO L78 Accepts]: Start accepts. Automaton has has 20 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 38 [2023-11-23 21:24:17,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:17,119 INFO L225 Difference]: With dead ends: 138 [2023-11-23 21:24:17,119 INFO L226 Difference]: Without dead ends: 138 [2023-11-23 21:24:17,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 95 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=1054, Unknown=0, NotChecked=0, Total=1332 [2023-11-23 21:24:17,120 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:17,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 16 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:24:17,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-23 21:24:17,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 126. [2023-11-23 21:24:17,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.2066115702479339) internal successors, (146), 125 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:24:17,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2023-11-23 21:24:17,125 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 38 [2023-11-23 21:24:17,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:17,125 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2023-11-23 21:24:17,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 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) [2023-11-23 21:24:17,126 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2023-11-23 21:24:17,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-23 21:24:17,128 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:17,128 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:17,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:17,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 21:24:17,350 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:24:17,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:17,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1315085316, now seen corresponding path program 2 times [2023-11-23 21:24:17,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:17,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000855041] [2023-11-23 21:24:17,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:17,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:17,789 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 113 proven. 87 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-23 21:24:17,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:17,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000855041] [2023-11-23 21:24:17,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000855041] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:17,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236241693] [2023-11-23 21:24:17,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:24:17,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:17,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:17,791 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:17,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 21:24:17,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-23 21:24:17,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:24:17,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:24:17,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-11-23 21:24:18,879 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:18,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236241693] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:18,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:24:18,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [10] total 12 [2023-11-23 21:24:18,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758478594] [2023-11-23 21:24:18,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:18,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:24:18,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:18,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:24:18,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:24:18,881 INFO L87 Difference]: Start difference. First operand 126 states and 146 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2023-11-23 21:24:18,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:18,955 INFO L93 Difference]: Finished difference Result 125 states and 145 transitions. [2023-11-23 21:24:18,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:24:18,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 51 [2023-11-23 21:24:18,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:18,957 INFO L225 Difference]: With dead ends: 125 [2023-11-23 21:24:18,957 INFO L226 Difference]: Without dead ends: 124 [2023-11-23 21:24:18,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:24:18,958 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:18,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 10 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 1 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:24:18,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-23 21:24:18,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 116. [2023-11-23 21:24:18,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 112 states have (on average 1.1607142857142858) internal successors, (130), 115 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:24:18,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 130 transitions. [2023-11-23 21:24:18,961 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 130 transitions. Word has length 51 [2023-11-23 21:24:18,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:18,962 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 130 transitions. [2023-11-23 21:24:18,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2023-11-23 21:24:18,962 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 130 transitions. [2023-11-23 21:24:18,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-23 21:24:18,964 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:18,964 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2023-11-23 21:24:18,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:19,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 21:24:19,174 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:24:19,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:19,175 INFO L85 PathProgramCache]: Analyzing trace with hash -2112935793, now seen corresponding path program 1 times [2023-11-23 21:24:19,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:19,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362984540] [2023-11-23 21:24:19,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:19,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 113 proven. 87 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-23 21:24:19,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:19,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362984540] [2023-11-23 21:24:19,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362984540] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:19,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887988674] [2023-11-23 21:24:19,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:19,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:19,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:19,618 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:19,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 21:24:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:19,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 21:24:19,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:19,852 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 130 proven. 70 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-23 21:24:19,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:24:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 130 proven. 70 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-23 21:24:19,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887988674] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:24:19,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [111342651] [2023-11-23 21:24:19,975 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-23 21:24:19,975 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:24:19,975 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:24:19,975 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:24:19,975 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:24:20,762 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:24:20,911 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4190#(and (<= (mod |ULTIMATE.start_main_~i~1#1| 4294967296) 31) (<= 0 |ULTIMATE.start_main_~i~1#1|) (or (< (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)) 0) (< (select |#length| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4))))' at error location [2023-11-23 21:24:20,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:24:20,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:24:20,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2023-11-23 21:24:20,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236759193] [2023-11-23 21:24:20,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:24:20,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 21:24:20,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:20,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 21:24:20,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2023-11-23 21:24:20,914 INFO L87 Difference]: Start difference. First operand 116 states and 130 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 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) [2023-11-23 21:24:21,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:21,320 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2023-11-23 21:24:21,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 21:24:21,320 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 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 52 [2023-11-23 21:24:21,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:21,322 INFO L225 Difference]: With dead ends: 90 [2023-11-23 21:24:21,322 INFO L226 Difference]: Without dead ends: 90 [2023-11-23 21:24:21,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2023-11-23 21:24:21,324 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:21,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 0 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:24:21,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-23 21:24:21,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2023-11-23 21:24:21,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 84 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) [2023-11-23 21:24:21,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2023-11-23 21:24:21,328 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 52 [2023-11-23 21:24:21,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:21,328 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2023-11-23 21:24:21,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 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) [2023-11-23 21:24:21,329 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2023-11-23 21:24:21,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-23 21:24:21,330 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:21,330 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 4, 3, 3, 1, 1] [2023-11-23 21:24:21,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:21,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-23 21:24:21,551 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:24:21,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:21,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1079963573, now seen corresponding path program 2 times [2023-11-23 21:24:21,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:21,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266029008] [2023-11-23 21:24:21,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:21,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-11-23 21:24:21,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:21,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266029008] [2023-11-23 21:24:21,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266029008] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:21,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716942887] [2023-11-23 21:24:21,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:24:21,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:21,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:21,935 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:21,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 21:24:22,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 21:24:22,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:24:22,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-23 21:24:22,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:22,038 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 11 treesize of output 5 [2023-11-23 21:24:22,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:24:22,044 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 6 treesize of output 1 [2023-11-23 21:24:22,307 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 12 proven. 150 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-11-23 21:24:22,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:24:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-11-23 21:24:22,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716942887] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:24:22,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [768708691] [2023-11-23 21:24:22,676 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-23 21:24:22,676 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:24:22,676 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:24:22,677 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:24:22,677 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:24:23,439 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:24:23,541 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4720#(and (or (< (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset|) 0) (< (select |#length| |ULTIMATE.start_foo_~b#1.base|) (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1))) (<= (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 31) (<= |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= 0 |ULTIMATE.start_foo_~i~0#1|))' at error location [2023-11-23 21:24:23,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:24:23,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:24:23,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2023-11-23 21:24:23,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839281480] [2023-11-23 21:24:23,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:24:23,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 21:24:23,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:23,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 21:24:23,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-11-23 21:24:23,543 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:24:23,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:23,786 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2023-11-23 21:24:23,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 21:24:23,786 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 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 [2023-11-23 21:24:23,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:23,787 INFO L225 Difference]: With dead ends: 89 [2023-11-23 21:24:23,787 INFO L226 Difference]: Without dead ends: 89 [2023-11-23 21:24:23,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2023-11-23 21:24:23,788 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 16 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:23,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 7 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:24:23,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-23 21:24:23,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2023-11-23 21:24:23,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 81 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) [2023-11-23 21:24:23,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2023-11-23 21:24:23,792 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 53 [2023-11-23 21:24:23,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:23,793 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2023-11-23 21:24:23,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:24:23,793 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2023-11-23 21:24:23,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-23 21:24:23,794 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:23,794 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2023-11-23 21:24:23,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-23 21:24:24,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:24,009 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:24:24,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:24,010 INFO L85 PathProgramCache]: Analyzing trace with hash 511100723, now seen corresponding path program 2 times [2023-11-23 21:24:24,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:24,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349847784] [2023-11-23 21:24:24,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:24,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 78 proven. 191 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-23 21:24:24,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:24,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349847784] [2023-11-23 21:24:24,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349847784] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:24,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199760702] [2023-11-23 21:24:24,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:24:24,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:24,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:24,546 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:24,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 21:24:24,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 21:24:24,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:24:24,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 21:24:24,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:24,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:24:24,659 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 [2023-11-23 21:24:24,666 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 [2023-11-23 21:24:24,927 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2023-11-23 21:24:24,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:24:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2023-11-23 21:24:25,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199760702] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:24:25,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1316694760] [2023-11-23 21:24:25,216 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-23 21:24:25,216 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:24:25,217 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:24:25,217 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:24:25,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:24:25,951 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:24:26,120 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5272#(and (<= (mod |ULTIMATE.start_main_~i~1#1| 4294967296) 31) (<= 0 |ULTIMATE.start_main_~i~1#1|) (or (< (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)) 0) (< (select |#length| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4))))' at error location [2023-11-23 21:24:26,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:24:26,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:24:26,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 3, 3] total 19 [2023-11-23 21:24:26,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521205941] [2023-11-23 21:24:26,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:24:26,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 21:24:26,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:26,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 21:24:26,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2023-11-23 21:24:26,122 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 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) [2023-11-23 21:24:26,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:26,975 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2023-11-23 21:24:26,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-23 21:24:26,975 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 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 58 [2023-11-23 21:24:26,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:26,976 INFO L225 Difference]: With dead ends: 94 [2023-11-23 21:24:26,976 INFO L226 Difference]: Without dead ends: 94 [2023-11-23 21:24:26,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=546, Invalid=2424, Unknown=0, NotChecked=0, Total=2970 [2023-11-23 21:24:26,979 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 161 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:26,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 0 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:24:26,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-23 21:24:26,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-11-23 21:24:26,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 91 states have (on average 1.0769230769230769) internal successors, (98), 93 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) [2023-11-23 21:24:26,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2023-11-23 21:24:26,983 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 58 [2023-11-23 21:24:26,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:26,984 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2023-11-23 21:24:26,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 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) [2023-11-23 21:24:26,984 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2023-11-23 21:24:26,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-23 21:24:26,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:26,987 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 5, 4, 4, 4, 4, 4, 1, 1, 1] [2023-11-23 21:24:27,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:27,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:27,208 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:24:27,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:27,209 INFO L85 PathProgramCache]: Analyzing trace with hash 342305104, now seen corresponding path program 3 times [2023-11-23 21:24:27,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:27,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169933712] [2023-11-23 21:24:27,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:27,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 0 proven. 195 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2023-11-23 21:24:27,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:27,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169933712] [2023-11-23 21:24:27,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169933712] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:27,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168139320] [2023-11-23 21:24:27,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:24:27,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:27,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:27,640 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:27,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-23 21:24:27,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:24:27,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:24:27,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-23 21:24:27,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:28,090 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-23 21:24:28,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:24:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 9 proven. 303 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-23 21:24:28,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168139320] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:24:28,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [286056998] [2023-11-23 21:24:28,472 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-23 21:24:28,472 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:24:28,472 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:24:28,472 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:24:28,472 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:24:29,358 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:24:29,610 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5965#(and (<= (mod |ULTIMATE.start_main_~i~1#1| 4294967296) 31) (<= 0 |ULTIMATE.start_main_~i~1#1|) (or (< (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)) 0) (< (select |#length| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4))))' at error location [2023-11-23 21:24:29,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:24:29,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:24:29,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 28 [2023-11-23 21:24:29,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840563189] [2023-11-23 21:24:29,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:24:29,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-23 21:24:29,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:29,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-23 21:24:29,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1044, Unknown=0, NotChecked=0, Total=1332 [2023-11-23 21:24:29,613 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 28 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:24:30,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:30,505 INFO L93 Difference]: Finished difference Result 237 states and 251 transitions. [2023-11-23 21:24:30,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-23 21:24:30,506 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 28 states have internal predecessors, (108), 0 states have call successors, (0), 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 70 [2023-11-23 21:24:30,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:30,507 INFO L225 Difference]: With dead ends: 237 [2023-11-23 21:24:30,507 INFO L226 Difference]: Without dead ends: 237 [2023-11-23 21:24:30,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=619, Invalid=2137, Unknown=0, NotChecked=0, Total=2756 [2023-11-23 21:24:30,509 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 275 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:30,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 71 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:24:30,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-11-23 21:24:30,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 208. [2023-11-23 21:24:30,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 205 states have (on average 1.1268292682926828) internal successors, (231), 207 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:24:30,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 231 transitions. [2023-11-23 21:24:30,516 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 231 transitions. Word has length 70 [2023-11-23 21:24:30,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:30,516 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 231 transitions. [2023-11-23 21:24:30,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 28 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:24:30,516 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 231 transitions. [2023-11-23 21:24:30,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-23 21:24:30,517 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:30,517 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 4, 4, 1, 1] [2023-11-23 21:24:30,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:30,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:30,739 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:24:30,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:30,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1266434589, now seen corresponding path program 3 times [2023-11-23 21:24:30,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:30,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498462413] [2023-11-23 21:24:30,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:30,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 416 proven. 153 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-11-23 21:24:31,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:31,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498462413] [2023-11-23 21:24:31,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498462413] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:31,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168648650] [2023-11-23 21:24:31,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:24:31,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:31,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:31,253 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:31,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-23 21:24:31,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:24:31,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:24:31,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 21:24:31,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 71 proven. 571 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-23 21:24:31,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:24:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 71 proven. 571 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-23 21:24:31,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168648650] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:24:31,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1303048139] [2023-11-23 21:24:31,926 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-23 21:24:31,927 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:24:31,927 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:24:31,927 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:24:31,927 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:24:32,395 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:24:32,750 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6928#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_foo_#in~size#1|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 2 |ULTIMATE.start_foo_~b#1.base|) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#mask~0#1.base|) (= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 32 (mod |ULTIMATE.start_foo_~i~0#1| 4294967296)) (<= |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= 2 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~i~0#1|))' at error location [2023-11-23 21:24:32,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:24:32,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:24:32,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 28 [2023-11-23 21:24:32,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884544595] [2023-11-23 21:24:32,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:24:32,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-23 21:24:32,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:32,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-23 21:24:32,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2023-11-23 21:24:32,753 INFO L87 Difference]: Start difference. First operand 208 states and 231 transitions. Second operand has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 28 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) [2023-11-23 21:24:33,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:33,388 INFO L93 Difference]: Finished difference Result 327 states and 361 transitions. [2023-11-23 21:24:33,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-23 21:24:33,391 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 28 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 76 [2023-11-23 21:24:33,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:33,393 INFO L225 Difference]: With dead ends: 327 [2023-11-23 21:24:33,394 INFO L226 Difference]: Without dead ends: 327 [2023-11-23 21:24:33,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 200 SyntacticMatches, 11 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=627, Invalid=2795, Unknown=0, NotChecked=0, Total=3422 [2023-11-23 21:24:33,396 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 45 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:33,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 8 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:24:33,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-11-23 21:24:33,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 314. [2023-11-23 21:24:33,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 311 states have (on average 1.1093247588424437) internal successors, (345), 313 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:24:33,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 345 transitions. [2023-11-23 21:24:33,423 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 345 transitions. Word has length 76 [2023-11-23 21:24:33,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:33,424 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 345 transitions. [2023-11-23 21:24:33,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 28 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) [2023-11-23 21:24:33,424 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 345 transitions. [2023-11-23 21:24:33,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-23 21:24:33,425 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:33,425 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 6, 6, 5, 1, 1] [2023-11-23 21:24:33,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:33,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-23 21:24:33,655 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:24:33,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:33,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1042849049, now seen corresponding path program 3 times [2023-11-23 21:24:33,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:33,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98032756] [2023-11-23 21:24:33,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:33,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 696 proven. 138 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2023-11-23 21:24:34,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:34,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98032756] [2023-11-23 21:24:34,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98032756] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:34,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027160964] [2023-11-23 21:24:34,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:24:34,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:34,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:34,207 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:34,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-23 21:24:34,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:24:34,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:24:34,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 21:24:34,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 539 proven. 369 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-11-23 21:24:34,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:24:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 539 proven. 369 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-11-23 21:24:34,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027160964] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:24:34,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1705361969] [2023-11-23 21:24:34,996 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-23 21:24:34,996 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:24:34,997 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:24:34,997 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:24:34,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:24:35,394 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:24:35,732 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8198#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 2 |ULTIMATE.start_foo_#res#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_#t~ret3#1| |ULTIMATE.start_foo_#res#1|) (<= (select |#length| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) 3)) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#mask~0#1.base|) (<= |ULTIMATE.start_main_#t~ret3#1| 2147483647))' at error location [2023-11-23 21:24:35,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:24:35,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:24:35,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 33 [2023-11-23 21:24:35,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43947511] [2023-11-23 21:24:35,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:24:35,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-23 21:24:35,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:35,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-23 21:24:35,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2023-11-23 21:24:35,736 INFO L87 Difference]: Start difference. First operand 314 states and 345 transitions. Second operand has 33 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 33 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) [2023-11-23 21:24:37,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:37,126 INFO L93 Difference]: Finished difference Result 218 states and 232 transitions. [2023-11-23 21:24:37,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-23 21:24:37,127 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 33 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 91 [2023-11-23 21:24:37,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:37,128 INFO L225 Difference]: With dead ends: 218 [2023-11-23 21:24:37,128 INFO L226 Difference]: Without dead ends: 218 [2023-11-23 21:24:37,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 246 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=908, Invalid=4062, Unknown=0, NotChecked=0, Total=4970 [2023-11-23 21:24:37,131 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:37,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:24:37,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-11-23 21:24:37,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2023-11-23 21:24:37,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 214 states have (on average 1.0794392523364487) internal successors, (231), 216 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:24:37,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 231 transitions. [2023-11-23 21:24:37,137 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 231 transitions. Word has length 91 [2023-11-23 21:24:37,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:37,138 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 231 transitions. [2023-11-23 21:24:37,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 33 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) [2023-11-23 21:24:37,138 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 231 transitions. [2023-11-23 21:24:37,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-23 21:24:37,139 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:37,139 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 6, 5, 5, 1, 1] [2023-11-23 21:24:37,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:37,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:37,354 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:24:37,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:37,355 INFO L85 PathProgramCache]: Analyzing trace with hash -669153778, now seen corresponding path program 4 times [2023-11-23 21:24:37,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:37,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380860722] [2023-11-23 21:24:37,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:37,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 435 proven. 57 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2023-11-23 21:24:37,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:37,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380860722] [2023-11-23 21:24:37,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380860722] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:37,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232770447] [2023-11-23 21:24:37,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 21:24:37,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:37,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:37,614 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:37,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-23 21:24:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:37,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 21:24:37,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 435 proven. 57 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2023-11-23 21:24:37,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:24:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 435 proven. 57 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2023-11-23 21:24:37,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232770447] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:24:37,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1494142052] [2023-11-23 21:24:37,975 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-23 21:24:37,975 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:24:37,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:24:37,976 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:24:37,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:24:38,627 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:24:38,721 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9297#(and (<= 32 (mod |ULTIMATE.start_foo_~i~0#1| 4294967296)) (<= |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= 0 |ULTIMATE.start_foo_~i~0#1|))' at error location [2023-11-23 21:24:38,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:24:38,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:24:38,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-11-23 21:24:38,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957116810] [2023-11-23 21:24:38,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:24:38,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 21:24:38,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:38,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 21:24:38,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2023-11-23 21:24:38,723 INFO L87 Difference]: Start difference. First operand 217 states and 231 transitions. Second operand has 17 states, 16 states have (on average 3.25) internal successors, (52), 17 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) [2023-11-23 21:24:39,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:39,150 INFO L93 Difference]: Finished difference Result 327 states and 376 transitions. [2023-11-23 21:24:39,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 21:24:39,150 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.25) internal successors, (52), 17 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 97 [2023-11-23 21:24:39,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:39,152 INFO L225 Difference]: With dead ends: 327 [2023-11-23 21:24:39,152 INFO L226 Difference]: Without dead ends: 327 [2023-11-23 21:24:39,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2023-11-23 21:24:39,153 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:39,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 38 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:24:39,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-11-23 21:24:39,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2023-11-23 21:24:39,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 324 states have (on average 1.1604938271604939) internal successors, (376), 326 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:24:39,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 376 transitions. [2023-11-23 21:24:39,162 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 376 transitions. Word has length 97 [2023-11-23 21:24:39,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:39,163 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 376 transitions. [2023-11-23 21:24:39,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.25) internal successors, (52), 17 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) [2023-11-23 21:24:39,163 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 376 transitions. [2023-11-23 21:24:39,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-23 21:24:39,164 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:39,164 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 6, 6, 5, 1, 1] [2023-11-23 21:24:39,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c6c6d-79b5-4852-b2d8-eabfb0a3bc7a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0