./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/lockfree-3.0.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 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_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.0.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje --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 ce7b97696e85da66033a1f3711f1d24681434c76600ae3cd891d7ea07b7fcbea --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:41:58,757 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:41:58,855 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-09 05:41:58,865 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:41:58,865 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:41:58,897 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:41:58,897 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:41:58,898 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:41:58,900 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:41:58,902 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:41:58,902 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:41:58,902 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:41:58,903 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:41:58,903 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:41:58,903 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:41:58,904 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:41:58,904 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:41:58,904 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:41:58,904 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:41:58,905 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:41:58,909 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:41:58,910 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:41:58,910 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 05:41:58,925 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 05:41:58,926 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:41:58,926 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:41:58,926 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:41:58,927 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:41:58,927 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:41:58,927 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 05:41:58,927 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 05:41:58,928 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 05:41:58,928 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:41:58,928 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 05:41:58,928 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:41:58,929 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 05:41:58,929 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:41:58,932 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:41:58,932 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:41:58,932 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:41:58,933 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:41:58,933 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:41:58,934 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:41:58,935 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:41:58,935 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:41:58,935 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:41:58,935 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:41:58,936 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:41:58,936 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:41:58,936 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_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce7b97696e85da66033a1f3711f1d24681434c76600ae3cd891d7ea07b7fcbea [2024-11-09 05:41:59,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:41:59,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:41:59,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:41:59,291 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:41:59,292 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:41:59,293 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/memsafety/lockfree-3.0.i Unable to find full path for "g++" [2024-11-09 05:42:01,273 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:42:01,496 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:42:01,497 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/sv-benchmarks/c/memsafety/lockfree-3.0.i [2024-11-09 05:42:01,511 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/data/ba0dfc465/30ff70efd2444f0b8c86981b71f71730/FLAGfba186bde [2024-11-09 05:42:01,527 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/data/ba0dfc465/30ff70efd2444f0b8c86981b71f71730 [2024-11-09 05:42:01,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:42:01,533 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:42:01,539 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:42:01,539 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:42:01,546 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:42:01,548 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:42:01" (1/1) ... [2024-11-09 05:42:01,550 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20baf06f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:01, skipping insertion in model container [2024-11-09 05:42:01,550 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:42:01" (1/1) ... [2024-11-09 05:42:01,595 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:42:01,986 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:42:01,996 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:42:02,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:42:02,075 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:42:02,075 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:02 WrapperNode [2024-11-09 05:42:02,076 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:42:02,077 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:42:02,077 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:42:02,077 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:42:02,085 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:02" (1/1) ... [2024-11-09 05:42:02,098 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:02" (1/1) ... [2024-11-09 05:42:02,120 INFO L138 Inliner]: procedures = 125, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 127 [2024-11-09 05:42:02,121 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:42:02,122 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:42:02,122 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:42:02,122 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:42:02,136 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:02" (1/1) ... [2024-11-09 05:42:02,137 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:02" (1/1) ... [2024-11-09 05:42:02,141 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:02" (1/1) ... [2024-11-09 05:42:02,142 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:02" (1/1) ... [2024-11-09 05:42:02,150 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:02" (1/1) ... [2024-11-09 05:42:02,154 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:02" (1/1) ... [2024-11-09 05:42:02,156 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:02" (1/1) ... [2024-11-09 05:42:02,157 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:02" (1/1) ... [2024-11-09 05:42:02,160 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:42:02,161 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:42:02,161 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:42:02,161 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:42:02,162 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:02" (1/1) ... [2024-11-09 05:42:02,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:42:02,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:42:02,198 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:42:02,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:42:02,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 05:42:02,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 05:42:02,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 05:42:02,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:42:02,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-09 05:42:02,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-09 05:42:02,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 05:42:02,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:42:02,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:42:02,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:42:02,444 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:42:02,447 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:42:02,862 INFO L? ?]: Removed 25 outVars from TransFormulas that were not future-live. [2024-11-09 05:42:02,863 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:42:02,957 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:42:02,957 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 05:42:02,958 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:42:02 BoogieIcfgContainer [2024-11-09 05:42:02,958 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:42:02,960 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:42:02,961 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:42:02,965 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:42:02,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:42:01" (1/3) ... [2024-11-09 05:42:02,966 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c90aa20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:42:02, skipping insertion in model container [2024-11-09 05:42:02,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:02" (2/3) ... [2024-11-09 05:42:02,967 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c90aa20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:42:02, skipping insertion in model container [2024-11-09 05:42:02,967 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:42:02" (3/3) ... [2024-11-09 05:42:02,968 INFO L112 eAbstractionObserver]: Analyzing ICFG lockfree-3.0.i [2024-11-09 05:42:03,024 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:42:03,024 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-11-09 05:42:03,096 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:42:03,105 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5986af91, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:42:03,105 INFO L334 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2024-11-09 05:42:03,110 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 50 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:03,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-09 05:42:03,121 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:42:03,122 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-09 05:42:03,123 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:42:03,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:42:03,133 INFO L85 PathProgramCache]: Analyzing trace with hash 184092649, now seen corresponding path program 1 times [2024-11-09 05:42:03,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:42:03,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824050099] [2024-11-09 05:42:03,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:03,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:42:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:03,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:42:03,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824050099] [2024-11-09 05:42:03,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824050099] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:42:03,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:42:03,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:42:03,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468252990] [2024-11-09 05:42:03,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:42:03,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 05:42:03,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:42:03,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 05:42:03,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 05:42:03,380 INFO L87 Difference]: Start difference. First operand has 51 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 50 states have internal predecessors, (64), 0 states have call successors, (0), 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 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:03,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:42:03,421 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2024-11-09 05:42:03,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 05:42:03,424 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-09 05:42:03,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:42:03,435 INFO L225 Difference]: With dead ends: 51 [2024-11-09 05:42:03,435 INFO L226 Difference]: Without dead ends: 50 [2024-11-09 05:42:03,438 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 05:42:03,442 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:42:03,443 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:42:03,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-09 05:42:03,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-09 05:42:03,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 2.066666666666667) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:03,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2024-11-09 05:42:03,488 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 5 [2024-11-09 05:42:03,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:42:03,489 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2024-11-09 05:42:03,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:03,489 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2024-11-09 05:42:03,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 05:42:03,490 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:42:03,490 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 05:42:03,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:42:03,491 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:42:03,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:42:03,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1446165645, now seen corresponding path program 1 times [2024-11-09 05:42:03,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:42:03,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528264035] [2024-11-09 05:42:03,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:03,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:42:03,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:03,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:42:03,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528264035] [2024-11-09 05:42:03,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528264035] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:42:03,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:42:03,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:42:03,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944374146] [2024-11-09 05:42:03,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:42:03,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:42:03,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:42:03,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:42:03,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:42:03,737 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:03,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:42:03,931 INFO L93 Difference]: Finished difference Result 89 states and 113 transitions. [2024-11-09 05:42:03,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:42:03,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-09 05:42:03,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:42:03,934 INFO L225 Difference]: With dead ends: 89 [2024-11-09 05:42:03,934 INFO L226 Difference]: Without dead ends: 89 [2024-11-09 05:42:03,934 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:42:03,938 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 53 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:42:03,941 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 109 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:42:03,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-09 05:42:03,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 67. [2024-11-09 05:42:03,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 49 states have (on average 2.0) internal successors, (98), 66 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:03,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 98 transitions. [2024-11-09 05:42:03,953 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 98 transitions. Word has length 6 [2024-11-09 05:42:03,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:42:03,956 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 98 transitions. [2024-11-09 05:42:03,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:03,956 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 98 transitions. [2024-11-09 05:42:03,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 05:42:03,957 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:42:03,957 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 05:42:03,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 05:42:03,958 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:42:03,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:42:03,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1446165646, now seen corresponding path program 1 times [2024-11-09 05:42:03,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:42:03,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804224522] [2024-11-09 05:42:03,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:03,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:42:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:04,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:42:04,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804224522] [2024-11-09 05:42:04,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804224522] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:42:04,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:42:04,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:42:04,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229462774] [2024-11-09 05:42:04,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:42:04,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:42:04,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:42:04,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:42:04,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:42:04,163 INFO L87 Difference]: Start difference. First operand 67 states and 98 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:04,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:42:04,278 INFO L93 Difference]: Finished difference Result 104 states and 147 transitions. [2024-11-09 05:42:04,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:42:04,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-09 05:42:04,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:42:04,280 INFO L225 Difference]: With dead ends: 104 [2024-11-09 05:42:04,281 INFO L226 Difference]: Without dead ends: 104 [2024-11-09 05:42:04,281 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:42:04,285 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 52 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:42:04,286 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 115 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:42:04,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-09 05:42:04,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2024-11-09 05:42:04,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 68 states have (on average 1.9411764705882353) internal successors, (132), 83 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:04,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 132 transitions. [2024-11-09 05:42:04,297 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 132 transitions. Word has length 6 [2024-11-09 05:42:04,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:42:04,298 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 132 transitions. [2024-11-09 05:42:04,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:04,298 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 132 transitions. [2024-11-09 05:42:04,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 05:42:04,299 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:42:04,299 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 05:42:04,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 05:42:04,299 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:42:04,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:42:04,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1446219329, now seen corresponding path program 1 times [2024-11-09 05:42:04,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:42:04,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873865061] [2024-11-09 05:42:04,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:04,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:42:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:04,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:04,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:42:04,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873865061] [2024-11-09 05:42:04,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873865061] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:42:04,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:42:04,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:42:04,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158544342] [2024-11-09 05:42:04,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:42:04,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:42:04,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:42:04,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:42:04,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:42:04,355 INFO L87 Difference]: Start difference. First operand 84 states and 132 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:04,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:42:04,449 INFO L93 Difference]: Finished difference Result 154 states and 249 transitions. [2024-11-09 05:42:04,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:42:04,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-09 05:42:04,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:42:04,451 INFO L225 Difference]: With dead ends: 154 [2024-11-09 05:42:04,452 INFO L226 Difference]: Without dead ends: 154 [2024-11-09 05:42:04,452 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:42:04,453 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 42 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:42:04,454 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 80 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:42:04,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-11-09 05:42:04,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 138. [2024-11-09 05:42:04,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 122 states have (on average 1.8934426229508197) internal successors, (231), 137 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) [2024-11-09 05:42:04,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 231 transitions. [2024-11-09 05:42:04,482 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 231 transitions. Word has length 6 [2024-11-09 05:42:04,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:42:04,482 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 231 transitions. [2024-11-09 05:42:04,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:04,487 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 231 transitions. [2024-11-09 05:42:04,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 05:42:04,487 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:42:04,487 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 05:42:04,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 05:42:04,488 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:42:04,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:42:04,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1446236114, now seen corresponding path program 1 times [2024-11-09 05:42:04,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:42:04,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229988369] [2024-11-09 05:42:04,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:04,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:42:04,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:04,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:42:04,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229988369] [2024-11-09 05:42:04,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229988369] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:42:04,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:42:04,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 05:42:04,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840290984] [2024-11-09 05:42:04,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:42:04,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:42:04,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:42:04,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:42:04,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:42:04,524 INFO L87 Difference]: Start difference. First operand 138 states and 231 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:04,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:42:04,606 INFO L93 Difference]: Finished difference Result 158 states and 246 transitions. [2024-11-09 05:42:04,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:42:04,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-09 05:42:04,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:42:04,608 INFO L225 Difference]: With dead ends: 158 [2024-11-09 05:42:04,608 INFO L226 Difference]: Without dead ends: 155 [2024-11-09 05:42:04,609 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:42:04,610 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 48 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:42:04,610 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 70 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:42:04,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-11-09 05:42:04,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2024-11-09 05:42:04,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 124 states have (on average 1.8629032258064515) internal successors, (231), 139 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) [2024-11-09 05:42:04,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 231 transitions. [2024-11-09 05:42:04,620 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 231 transitions. Word has length 6 [2024-11-09 05:42:04,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:42:04,621 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 231 transitions. [2024-11-09 05:42:04,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:04,621 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 231 transitions. [2024-11-09 05:42:04,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 05:42:04,622 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:42:04,622 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:42:04,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 05:42:04,622 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:42:04,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:42:04,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1881470038, now seen corresponding path program 1 times [2024-11-09 05:42:04,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:42:04,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361666868] [2024-11-09 05:42:04,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:04,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:42:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:04,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:42:04,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361666868] [2024-11-09 05:42:04,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361666868] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:42:04,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:42:04,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 05:42:04,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142290441] [2024-11-09 05:42:04,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:42:04,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:42:04,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:42:04,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:42:04,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:42:04,697 INFO L87 Difference]: Start difference. First operand 140 states and 231 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:04,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:42:04,810 INFO L93 Difference]: Finished difference Result 198 states and 307 transitions. [2024-11-09 05:42:04,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:42:04,811 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 05:42:04,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:42:04,812 INFO L225 Difference]: With dead ends: 198 [2024-11-09 05:42:04,812 INFO L226 Difference]: Without dead ends: 198 [2024-11-09 05:42:04,813 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:42:04,814 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 43 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:42:04,815 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 182 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:42:04,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-09 05:42:04,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 170. [2024-11-09 05:42:04,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 154 states have (on average 1.844155844155844) internal successors, (284), 169 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:04,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 284 transitions. [2024-11-09 05:42:04,826 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 284 transitions. Word has length 7 [2024-11-09 05:42:04,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:42:04,827 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 284 transitions. [2024-11-09 05:42:04,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:04,827 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 284 transitions. [2024-11-09 05:42:04,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-09 05:42:04,828 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:42:04,828 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:42:04,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 05:42:04,828 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:42:04,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:42:04,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1752615185, now seen corresponding path program 1 times [2024-11-09 05:42:04,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:42:04,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214769967] [2024-11-09 05:42:04,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:04,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:42:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:04,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:42:04,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214769967] [2024-11-09 05:42:04,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214769967] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:42:04,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:42:04,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:42:04,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580403441] [2024-11-09 05:42:04,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:42:04,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:42:04,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:42:04,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:42:04,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:42:04,885 INFO L87 Difference]: Start difference. First operand 170 states and 284 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:04,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:42:04,940 INFO L93 Difference]: Finished difference Result 281 states and 443 transitions. [2024-11-09 05:42:04,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:42:04,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-09 05:42:04,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:42:04,942 INFO L225 Difference]: With dead ends: 281 [2024-11-09 05:42:04,943 INFO L226 Difference]: Without dead ends: 281 [2024-11-09 05:42:04,943 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:42:04,944 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 35 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:42:04,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 132 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:42:04,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2024-11-09 05:42:04,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 260. [2024-11-09 05:42:04,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 244 states have (on average 1.7418032786885247) internal successors, (425), 259 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:04,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 425 transitions. [2024-11-09 05:42:04,958 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 425 transitions. Word has length 8 [2024-11-09 05:42:04,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:42:04,958 INFO L471 AbstractCegarLoop]: Abstraction has 260 states and 425 transitions. [2024-11-09 05:42:04,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:04,958 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 425 transitions. [2024-11-09 05:42:04,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 05:42:04,959 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:42:04,959 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:42:04,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 05:42:04,960 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:42:04,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:42:04,961 INFO L85 PathProgramCache]: Analyzing trace with hash -230799044, now seen corresponding path program 1 times [2024-11-09 05:42:04,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:42:04,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264760060] [2024-11-09 05:42:04,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:04,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:42:04,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:05,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:42:05,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264760060] [2024-11-09 05:42:05,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264760060] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:42:05,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961564148] [2024-11-09 05:42:05,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:05,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:42:05,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:42:05,124 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:42:05,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:42:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:05,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 05:42:05,244 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:42:05,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:05,341 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:42:05,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:05,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961564148] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:42:05,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1353747059] [2024-11-09 05:42:05,426 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 05:42:05,426 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:42:05,433 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:42:05,440 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:42:05,440 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:42:06,870 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:42:15,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1353747059] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:42:15,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:42:15,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 4, 4] total 15 [2024-11-09 05:42:15,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286092454] [2024-11-09 05:42:15,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:42:15,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 05:42:15,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:42:15,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 05:42:15,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=174, Unknown=4, NotChecked=0, Total=240 [2024-11-09 05:42:15,992 INFO L87 Difference]: Start difference. First operand 260 states and 425 transitions. Second operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:18,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:42:20,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:42:21,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:42:21,501 INFO L93 Difference]: Finished difference Result 270 states and 437 transitions. [2024-11-09 05:42:21,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 05:42:21,502 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-09 05:42:21,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:42:21,504 INFO L225 Difference]: With dead ends: 270 [2024-11-09 05:42:21,504 INFO L226 Difference]: Without dead ends: 267 [2024-11-09 05:42:21,504 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=70, Invalid=198, Unknown=4, NotChecked=0, Total=272 [2024-11-09 05:42:21,505 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 1 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:42:21,506 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 131 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 400 Invalid, 5 Unknown, 0 Unchecked, 5.3s Time] [2024-11-09 05:42:21,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-11-09 05:42:21,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2024-11-09 05:42:21,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 251 states have (on average 1.7290836653386454) internal successors, (434), 266 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:21,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 434 transitions. [2024-11-09 05:42:21,527 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 434 transitions. Word has length 13 [2024-11-09 05:42:21,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:42:21,527 INFO L471 AbstractCegarLoop]: Abstraction has 267 states and 434 transitions. [2024-11-09 05:42:21,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:21,528 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 434 transitions. [2024-11-09 05:42:21,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 05:42:21,529 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:42:21,529 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:42:21,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 05:42:21,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-09 05:42:21,735 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:42:21,735 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:42:21,735 INFO L85 PathProgramCache]: Analyzing trace with hash -365909121, now seen corresponding path program 1 times [2024-11-09 05:42:21,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:42:21,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132432453] [2024-11-09 05:42:21,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:21,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:42:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:21,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:21,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:42:21,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132432453] [2024-11-09 05:42:21,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132432453] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:42:21,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582692248] [2024-11-09 05:42:21,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:21,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:42:21,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:42:21,844 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:42:21,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:42:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:21,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:42:21,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:42:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:21,986 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:42:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:22,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582692248] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:42:22,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [307026963] [2024-11-09 05:42:22,072 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:42:22,072 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:42:22,072 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:42:22,072 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:42:22,073 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:42:22,556 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:42:24,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [307026963] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:42:24,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:42:24,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 5, 5] total 13 [2024-11-09 05:42:24,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315076666] [2024-11-09 05:42:24,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:42:24,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 05:42:24,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:42:24,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 05:42:24,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-11-09 05:42:24,675 INFO L87 Difference]: Start difference. First operand 267 states and 434 transitions. Second operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:25,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:42:25,204 INFO L93 Difference]: Finished difference Result 240 states and 384 transitions. [2024-11-09 05:42:25,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 05:42:25,205 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 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 13 [2024-11-09 05:42:25,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:42:25,206 INFO L225 Difference]: With dead ends: 240 [2024-11-09 05:42:25,206 INFO L226 Difference]: Without dead ends: 240 [2024-11-09 05:42:25,207 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-11-09 05:42:25,207 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 1 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:42:25,208 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 86 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:42:25,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2024-11-09 05:42:25,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 238. [2024-11-09 05:42:25,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 222 states have (on average 1.7207207207207207) internal successors, (382), 237 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:25,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 382 transitions. [2024-11-09 05:42:25,215 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 382 transitions. Word has length 13 [2024-11-09 05:42:25,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:42:25,216 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 382 transitions. [2024-11-09 05:42:25,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:25,216 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 382 transitions. [2024-11-09 05:42:25,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 05:42:25,217 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:42:25,217 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:42:25,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 05:42:25,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-09 05:42:25,418 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:42:25,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:42:25,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1421307459, now seen corresponding path program 1 times [2024-11-09 05:42:25,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:42:25,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057521487] [2024-11-09 05:42:25,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:25,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:42:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:25,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:42:25,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:42:25,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057521487] [2024-11-09 05:42:25,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057521487] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:42:25,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:42:25,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:42:25,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122980217] [2024-11-09 05:42:25,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:42:25,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:42:25,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:42:25,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:42:25,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:42:25,484 INFO L87 Difference]: Start difference. First operand 238 states and 382 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:25,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:42:25,555 INFO L93 Difference]: Finished difference Result 108 states and 150 transitions. [2024-11-09 05:42:25,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:42:25,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-09 05:42:25,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:42:25,557 INFO L225 Difference]: With dead ends: 108 [2024-11-09 05:42:25,557 INFO L226 Difference]: Without dead ends: 108 [2024-11-09 05:42:25,557 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:42:25,558 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:42:25,558 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 119 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:42:25,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-09 05:42:25,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2024-11-09 05:42:25,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 96 states have (on average 1.5625) internal successors, (150), 107 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:25,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 150 transitions. [2024-11-09 05:42:25,562 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 150 transitions. Word has length 15 [2024-11-09 05:42:25,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:42:25,562 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 150 transitions. [2024-11-09 05:42:25,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:25,562 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 150 transitions. [2024-11-09 05:42:25,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-09 05:42:25,563 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:42:25,563 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:42:25,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 05:42:25,563 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:42:25,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:42:25,564 INFO L85 PathProgramCache]: Analyzing trace with hash -875953864, now seen corresponding path program 1 times [2024-11-09 05:42:25,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:42:25,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75239067] [2024-11-09 05:42:25,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:25,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:42:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:42:25,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:42:25,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75239067] [2024-11-09 05:42:25,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75239067] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:42:25,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778082081] [2024-11-09 05:42:25,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:25,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:42:25,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:42:25,738 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:42:25,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:42:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:25,821 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 05:42:25,822 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:42:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:42:25,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:42:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:42:25,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778082081] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:42:25,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [405436164] [2024-11-09 05:42:25,969 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 05:42:25,970 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:42:25,970 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:42:25,970 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:42:25,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:42:28,723 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:42:31,252 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3543#(and (= ~garbage~0.offset 0) (exists ((|v_ULTIMATE.start_main_old_#valid#1_11| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_11| |#valid|))) (<= 1 ~pc4~0) (= 0 ~garbage~0.base) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-09 05:42:31,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:42:31,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:42:31,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-09 05:42:31,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993763616] [2024-11-09 05:42:31,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:42:31,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:42:31,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:42:31,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:42:31,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=218, Unknown=3, NotChecked=0, Total=272 [2024-11-09 05:42:31,255 INFO L87 Difference]: Start difference. First operand 108 states and 150 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2024-11-09 05:42:31,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:42:31,356 INFO L93 Difference]: Finished difference Result 149 states and 207 transitions. [2024-11-09 05:42:31,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:42:31,357 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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 18 [2024-11-09 05:42:31,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:42:31,358 INFO L225 Difference]: With dead ends: 149 [2024-11-09 05:42:31,358 INFO L226 Difference]: Without dead ends: 149 [2024-11-09 05:42:31,358 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=57, Invalid=246, Unknown=3, NotChecked=0, Total=306 [2024-11-09 05:42:31,359 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 121 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:42:31,359 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 166 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:42:31,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-11-09 05:42:31,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 136. [2024-11-09 05:42:31,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 124 states have (on average 1.596774193548387) internal successors, (198), 135 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:31,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 198 transitions. [2024-11-09 05:42:31,364 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 198 transitions. Word has length 18 [2024-11-09 05:42:31,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:42:31,365 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 198 transitions. [2024-11-09 05:42:31,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2024-11-09 05:42:31,365 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 198 transitions. [2024-11-09 05:42:31,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-09 05:42:31,366 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:42:31,366 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:42:31,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 05:42:31,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 05:42:31,571 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:42:31,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:42:31,572 INFO L85 PathProgramCache]: Analyzing trace with hash 5809877, now seen corresponding path program 1 times [2024-11-09 05:42:31,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:42:31,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365860208] [2024-11-09 05:42:31,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:31,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:42:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 05:42:31,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:42:31,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365860208] [2024-11-09 05:42:31,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365860208] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:42:31,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780903525] [2024-11-09 05:42:31,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:31,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:42:31,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:42:31,762 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:42:31,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:42:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:31,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:42:31,846 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:42:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 05:42:31,914 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:42:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 05:42:31,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780903525] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:42:31,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [892238305] [2024-11-09 05:42:31,994 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 05:42:31,994 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:42:31,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:42:31,995 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:42:31,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:42:34,924 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:42:37,463 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3962#(and (or (< (+ ~t4~0.offset 4) 0) (< (select |#length| ~t4~0.base) (+ ~t4~0.offset 8))) (= |ULTIMATE.start_pop_#t~post6#1| 3) (<= 2 ~pc4~0))' at error location [2024-11-09 05:42:37,464 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:42:37,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:42:37,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-11-09 05:42:37,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197759073] [2024-11-09 05:42:37,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:42:37,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 05:42:37,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:42:37,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 05:42:37,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=280, Unknown=3, NotChecked=0, Total=342 [2024-11-09 05:42:37,466 INFO L87 Difference]: Start difference. First operand 136 states and 198 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:37,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:42:37,641 INFO L93 Difference]: Finished difference Result 234 states and 322 transitions. [2024-11-09 05:42:37,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 05:42:37,641 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-09 05:42:37,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:42:37,643 INFO L225 Difference]: With dead ends: 234 [2024-11-09 05:42:37,643 INFO L226 Difference]: Without dead ends: 234 [2024-11-09 05:42:37,643 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=69, Invalid=348, Unknown=3, NotChecked=0, Total=420 [2024-11-09 05:42:37,644 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 87 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:42:37,644 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 229 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:42:37,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2024-11-09 05:42:37,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 197. [2024-11-09 05:42:37,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 185 states have (on average 1.5243243243243243) internal successors, (282), 196 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:37,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 282 transitions. [2024-11-09 05:42:37,650 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 282 transitions. Word has length 20 [2024-11-09 05:42:37,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:42:37,650 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 282 transitions. [2024-11-09 05:42:37,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:37,650 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 282 transitions. [2024-11-09 05:42:37,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 05:42:37,651 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:42:37,651 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:42:37,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 05:42:37,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 05:42:37,852 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:42:37,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:42:37,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1316705199, now seen corresponding path program 1 times [2024-11-09 05:42:37,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:42:37,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281916731] [2024-11-09 05:42:37,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:37,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:42:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:37,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:37,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:42:37,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281916731] [2024-11-09 05:42:37,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281916731] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:42:37,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149405294] [2024-11-09 05:42:37,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:37,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:42:37,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:42:37,986 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:42:37,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:42:38,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:38,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 05:42:38,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:42:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:38,091 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:42:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:38,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149405294] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:42:38,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [98063192] [2024-11-09 05:42:38,128 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-09 05:42:38,128 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:42:38,129 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:42:38,129 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:42:38,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:42:38,897 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:42:48,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [98063192] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:42:48,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:42:48,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [5, 5, 5] total 15 [2024-11-09 05:42:48,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060986159] [2024-11-09 05:42:48,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:42:48,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 05:42:48,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:42:48,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 05:42:48,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=189, Unknown=4, NotChecked=0, Total=240 [2024-11-09 05:42:48,111 INFO L87 Difference]: Start difference. First operand 197 states and 282 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:50,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:42:52,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:42:53,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:42:53,859 INFO L93 Difference]: Finished difference Result 205 states and 292 transitions. [2024-11-09 05:42:53,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 05:42:53,860 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-09 05:42:53,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:42:53,861 INFO L225 Difference]: With dead ends: 205 [2024-11-09 05:42:53,861 INFO L226 Difference]: Without dead ends: 205 [2024-11-09 05:42:53,861 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=54, Invalid=214, Unknown=4, NotChecked=0, Total=272 [2024-11-09 05:42:53,862 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 3 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:42:53,862 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 122 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 366 Invalid, 4 Unknown, 0 Unchecked, 5.5s Time] [2024-11-09 05:42:53,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-09 05:42:53,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2024-11-09 05:42:53,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 193 states have (on average 1.5129533678756477) internal successors, (292), 204 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:53,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 292 transitions. [2024-11-09 05:42:53,868 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 292 transitions. Word has length 21 [2024-11-09 05:42:53,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:42:53,868 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 292 transitions. [2024-11-09 05:42:53,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:53,869 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 292 transitions. [2024-11-09 05:42:53,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 05:42:53,870 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:42:53,870 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:42:53,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 05:42:54,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 05:42:54,071 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:42:54,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:42:54,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1658242215, now seen corresponding path program 2 times [2024-11-09 05:42:54,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:42:54,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369868810] [2024-11-09 05:42:54,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:54,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:42:54,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:54,251 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:42:54,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:42:54,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369868810] [2024-11-09 05:42:54,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369868810] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:42:54,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514593032] [2024-11-09 05:42:54,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:42:54,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:42:54,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:42:54,255 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:42:54,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:42:54,342 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 05:42:54,342 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:42:54,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:42:54,344 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:42:54,384 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:42:54,385 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:42:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:42:54,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514593032] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:42:54,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [920317732] [2024-11-09 05:42:54,424 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 05:42:54,425 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:42:54,425 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:42:54,425 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:42:54,425 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:42:56,770 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:42:59,265 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5107#(and (or (< (+ ~t4~0.offset 4) 0) (< (select |#length| ~t4~0.base) (+ ~t4~0.offset 8))) (= |ULTIMATE.start_pop_#t~post6#1| 3) (<= 2 ~pc4~0))' at error location [2024-11-09 05:42:59,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:42:59,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:42:59,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2024-11-09 05:42:59,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61461489] [2024-11-09 05:42:59,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:42:59,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:42:59,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:42:59,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:42:59,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=249, Unknown=2, NotChecked=0, Total=306 [2024-11-09 05:42:59,268 INFO L87 Difference]: Start difference. First operand 205 states and 292 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2024-11-09 05:42:59,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:42:59,452 INFO L93 Difference]: Finished difference Result 293 states and 405 transitions. [2024-11-09 05:42:59,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 05:42:59,453 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 25 [2024-11-09 05:42:59,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:42:59,455 INFO L225 Difference]: With dead ends: 293 [2024-11-09 05:42:59,455 INFO L226 Difference]: Without dead ends: 293 [2024-11-09 05:42:59,455 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=74, Invalid=344, Unknown=2, NotChecked=0, Total=420 [2024-11-09 05:42:59,456 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 64 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:42:59,456 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 182 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:42:59,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-11-09 05:42:59,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 205. [2024-11-09 05:42:59,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 193 states have (on average 1.5129533678756477) internal successors, (292), 204 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:59,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 292 transitions. [2024-11-09 05:42:59,464 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 292 transitions. Word has length 25 [2024-11-09 05:42:59,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:42:59,464 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 292 transitions. [2024-11-09 05:42:59,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2024-11-09 05:42:59,465 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 292 transitions. [2024-11-09 05:42:59,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-09 05:42:59,465 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:42:59,466 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:42:59,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 05:42:59,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 05:42:59,667 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:42:59,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:42:59,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1270697899, now seen corresponding path program 1 times [2024-11-09 05:42:59,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:42:59,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914718756] [2024-11-09 05:42:59,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:59,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:42:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:59,866 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 05:42:59,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:42:59,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914718756] [2024-11-09 05:42:59,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914718756] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:42:59,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411104148] [2024-11-09 05:42:59,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:59,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:42:59,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:42:59,869 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:42:59,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:42:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:59,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 05:42:59,971 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 05:43:00,032 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:43:00,098 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 05:43:00,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411104148] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:43:00,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [285686871] [2024-11-09 05:43:00,100 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 05:43:00,101 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:43:00,102 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:43:00,102 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:43:00,103 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:43:04,371 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:43:04,982 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5778#(and (= ~garbage~0.offset 0) (<= 1 ~pc4~0) (= 0 ~garbage~0.base) (exists ((|v_ULTIMATE.start_main_old_#valid#1_13| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_13| |#valid|))) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-09 05:43:04,982 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:43:04,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:43:04,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-11-09 05:43:04,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361144494] [2024-11-09 05:43:04,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:43:04,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:43:04,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:04,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:43:04,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=255, Unknown=1, NotChecked=0, Total=306 [2024-11-09 05:43:04,984 INFO L87 Difference]: Start difference. First operand 205 states and 292 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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) [2024-11-09 05:43:05,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:05,145 INFO L93 Difference]: Finished difference Result 306 states and 421 transitions. [2024-11-09 05:43:05,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:43:05,146 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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 26 [2024-11-09 05:43:05,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:05,148 INFO L225 Difference]: With dead ends: 306 [2024-11-09 05:43:05,148 INFO L226 Difference]: Without dead ends: 306 [2024-11-09 05:43:05,148 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=321, Unknown=1, NotChecked=0, Total=380 [2024-11-09 05:43:05,149 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 29 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:05,149 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 219 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:43:05,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2024-11-09 05:43:05,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 273. [2024-11-09 05:43:05,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 261 states have (on average 1.5057471264367817) internal successors, (393), 272 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:05,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 393 transitions. [2024-11-09 05:43:05,157 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 393 transitions. Word has length 26 [2024-11-09 05:43:05,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:05,157 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 393 transitions. [2024-11-09 05:43:05,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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) [2024-11-09 05:43:05,157 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 393 transitions. [2024-11-09 05:43:05,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-09 05:43:05,158 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:05,158 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:05,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 05:43:05,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:05,363 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:43:05,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:05,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1403131066, now seen corresponding path program 1 times [2024-11-09 05:43:05,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:05,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437116347] [2024-11-09 05:43:05,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:05,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 05:43:05,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:05,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437116347] [2024-11-09 05:43:05,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437116347] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:05,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154978068] [2024-11-09 05:43:05,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:05,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:05,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:05,570 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:05,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 05:43:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:05,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 05:43:05,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:05,856 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 05:43:05,856 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:43:06,038 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 05:43:06,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154978068] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:43:06,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [229254575] [2024-11-09 05:43:06,040 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 05:43:06,040 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:43:06,040 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:43:06,040 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:43:06,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:43:08,025 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:43:10,525 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6535#(and (or (< (+ ~t4~0.offset 4) 0) (< (select |#length| ~t4~0.base) (+ ~t4~0.offset 8))) (= |ULTIMATE.start_pop_#t~post6#1| 3))' at error location [2024-11-09 05:43:10,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:43:10,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:43:10,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 7] total 11 [2024-11-09 05:43:10,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895761700] [2024-11-09 05:43:10,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:43:10,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 05:43:10,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:10,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 05:43:10,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=327, Unknown=2, NotChecked=0, Total=380 [2024-11-09 05:43:10,528 INFO L87 Difference]: Start difference. First operand 273 states and 393 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:11,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:11,508 INFO L93 Difference]: Finished difference Result 985 states and 1393 transitions. [2024-11-09 05:43:11,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 05:43:11,509 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 26 [2024-11-09 05:43:11,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:11,513 INFO L225 Difference]: With dead ends: 985 [2024-11-09 05:43:11,514 INFO L226 Difference]: Without dead ends: 985 [2024-11-09 05:43:11,514 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=233, Invalid=1247, Unknown=2, NotChecked=0, Total=1482 [2024-11-09 05:43:11,515 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 432 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:11,516 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 339 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:43:11,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2024-11-09 05:43:11,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 582. [2024-11-09 05:43:11,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 570 states have (on average 1.5298245614035089) internal successors, (872), 581 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:11,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 872 transitions. [2024-11-09 05:43:11,535 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 872 transitions. Word has length 26 [2024-11-09 05:43:11,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:11,536 INFO L471 AbstractCegarLoop]: Abstraction has 582 states and 872 transitions. [2024-11-09 05:43:11,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:11,536 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 872 transitions. [2024-11-09 05:43:11,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 05:43:11,537 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:11,537 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:11,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 05:43:11,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 05:43:11,742 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:43:11,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:11,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1498580427, now seen corresponding path program 1 times [2024-11-09 05:43:11,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:11,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826545056] [2024-11-09 05:43:11,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:11,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:11,954 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 05:43:11,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:11,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826545056] [2024-11-09 05:43:11,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826545056] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:11,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050426014] [2024-11-09 05:43:11,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:11,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:11,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:11,956 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:11,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 05:43:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:12,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 05:43:12,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:12,161 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:43:12,161 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:43:12,210 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:43:12,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050426014] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:43:12,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [834689556] [2024-11-09 05:43:12,212 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 05:43:12,212 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:43:12,213 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:43:12,213 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:43:12,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:43:13,208 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:43:14,625 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8319#(and (exists ((|v_ULTIMATE.start_main_old_#valid#1_14| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_14| |#valid|))) (= ~pc1~0 1) (= ~S~0.base 0) (= ~pc4~0 1) (= ~S~0.offset 0) (= ~garbage~0.offset 0) (= 0 ~garbage~0.base) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-09 05:43:14,626 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:43:14,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:43:14,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2024-11-09 05:43:14,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485484472] [2024-11-09 05:43:14,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:43:14,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 05:43:14,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:14,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 05:43:14,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=363, Unknown=1, NotChecked=0, Total=420 [2024-11-09 05:43:14,628 INFO L87 Difference]: Start difference. First operand 582 states and 872 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:15,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:15,093 INFO L93 Difference]: Finished difference Result 840 states and 1195 transitions. [2024-11-09 05:43:15,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 05:43:15,093 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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 28 [2024-11-09 05:43:15,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:15,096 INFO L225 Difference]: With dead ends: 840 [2024-11-09 05:43:15,097 INFO L226 Difference]: Without dead ends: 838 [2024-11-09 05:43:15,097 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=106, Invalid=705, Unknown=1, NotChecked=0, Total=812 [2024-11-09 05:43:15,098 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 98 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:15,098 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 375 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:43:15,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2024-11-09 05:43:15,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 810. [2024-11-09 05:43:15,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 798 states have (on average 1.4749373433583959) internal successors, (1177), 809 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:15,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1177 transitions. [2024-11-09 05:43:15,119 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1177 transitions. Word has length 28 [2024-11-09 05:43:15,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:15,119 INFO L471 AbstractCegarLoop]: Abstraction has 810 states and 1177 transitions. [2024-11-09 05:43:15,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:15,120 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1177 transitions. [2024-11-09 05:43:15,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 05:43:15,120 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:15,121 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:15,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 05:43:15,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:15,325 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:43:15,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:15,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1296574891, now seen corresponding path program 1 times [2024-11-09 05:43:15,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:15,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053936911] [2024-11-09 05:43:15,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:15,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 05:43:15,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:15,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053936911] [2024-11-09 05:43:15,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053936911] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:15,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990927046] [2024-11-09 05:43:15,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:15,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:15,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:15,493 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:15,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 05:43:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:15,608 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 05:43:15,609 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:15,672 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 05:43:15,672 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:43:15,732 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 05:43:15,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990927046] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:43:15,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [254252076] [2024-11-09 05:43:15,734 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 05:43:15,735 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:43:15,735 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:43:15,735 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:43:15,735 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:43:17,531 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:43:20,124 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10173#(and (or (< (+ ~t4~0.offset 4) 0) (< (select |#length| ~t4~0.base) (+ ~t4~0.offset 8))) (= |ULTIMATE.start_pop_#t~post6#1| 3) (<= 2 ~pc4~0))' at error location [2024-11-09 05:43:20,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:43:20,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:43:20,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-11-09 05:43:20,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841675765] [2024-11-09 05:43:20,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:43:20,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:43:20,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:20,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:43:20,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=242, Unknown=2, NotChecked=0, Total=306 [2024-11-09 05:43:20,126 INFO L87 Difference]: Start difference. First operand 810 states and 1177 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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) [2024-11-09 05:43:20,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:20,301 INFO L93 Difference]: Finished difference Result 1206 states and 1678 transitions. [2024-11-09 05:43:20,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:43:20,302 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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) Word has length 29 [2024-11-09 05:43:20,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:20,307 INFO L225 Difference]: With dead ends: 1206 [2024-11-09 05:43:20,307 INFO L226 Difference]: Without dead ends: 1206 [2024-11-09 05:43:20,307 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=72, Invalid=306, Unknown=2, NotChecked=0, Total=380 [2024-11-09 05:43:20,308 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 59 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:20,308 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 289 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:43:20,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2024-11-09 05:43:20,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1140. [2024-11-09 05:43:20,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1128 states have (on average 1.426418439716312) internal successors, (1609), 1139 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:20,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1609 transitions. [2024-11-09 05:43:20,334 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1609 transitions. Word has length 29 [2024-11-09 05:43:20,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:20,334 INFO L471 AbstractCegarLoop]: Abstraction has 1140 states and 1609 transitions. [2024-11-09 05:43:20,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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) [2024-11-09 05:43:20,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1609 transitions. [2024-11-09 05:43:20,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-09 05:43:20,335 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:20,336 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:20,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 05:43:20,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 05:43:20,536 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:43:20,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:20,537 INFO L85 PathProgramCache]: Analyzing trace with hash -349432239, now seen corresponding path program 2 times [2024-11-09 05:43:20,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:20,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205383438] [2024-11-09 05:43:20,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:20,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:20,679 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:43:20,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:20,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205383438] [2024-11-09 05:43:20,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205383438] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:20,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847288014] [2024-11-09 05:43:20,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:43:20,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:20,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:20,683 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:20,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 05:43:20,783 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 05:43:20,783 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:43:20,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:43:20,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:43:20,883 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:43:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:43:20,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847288014] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:43:20,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2128838365] [2024-11-09 05:43:20,942 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 05:43:20,942 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:43:20,943 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:43:20,943 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:43:20,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:43:22,592 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:43:25,311 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12743#(and (or (< (+ ~t4~0.offset 4) 0) (< (select |#length| ~t4~0.base) (+ ~t4~0.offset 8))) (= |ULTIMATE.start_pop_#t~post6#1| 3) (<= 2 ~pc4~0))' at error location [2024-11-09 05:43:25,312 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:43:25,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:43:25,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2024-11-09 05:43:25,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724677729] [2024-11-09 05:43:25,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:43:25,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 05:43:25,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:25,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 05:43:25,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=345, Unknown=2, NotChecked=0, Total=420 [2024-11-09 05:43:25,313 INFO L87 Difference]: Start difference. First operand 1140 states and 1609 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:25,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:25,785 INFO L93 Difference]: Finished difference Result 1332 states and 1787 transitions. [2024-11-09 05:43:25,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 05:43:25,786 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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 34 [2024-11-09 05:43:25,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:25,790 INFO L225 Difference]: With dead ends: 1332 [2024-11-09 05:43:25,790 INFO L226 Difference]: Without dead ends: 1332 [2024-11-09 05:43:25,791 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=189, Invalid=865, Unknown=2, NotChecked=0, Total=1056 [2024-11-09 05:43:25,791 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 241 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:25,792 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 406 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:43:25,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2024-11-09 05:43:25,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 1219. [2024-11-09 05:43:25,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1207 states have (on average 1.3777961888980945) internal successors, (1663), 1218 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:25,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 1663 transitions. [2024-11-09 05:43:25,819 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 1663 transitions. Word has length 34 [2024-11-09 05:43:25,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:25,820 INFO L471 AbstractCegarLoop]: Abstraction has 1219 states and 1663 transitions. [2024-11-09 05:43:25,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:25,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 1663 transitions. [2024-11-09 05:43:25,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 05:43:25,821 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:25,821 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:25,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 05:43:26,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:26,025 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:43:26,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:26,025 INFO L85 PathProgramCache]: Analyzing trace with hash -220645039, now seen corresponding path program 1 times [2024-11-09 05:43:26,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:26,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332427301] [2024-11-09 05:43:26,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:26,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:43:26,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:26,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332427301] [2024-11-09 05:43:26,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332427301] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:26,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668568343] [2024-11-09 05:43:26,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:26,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:26,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:26,240 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:26,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 05:43:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:26,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:43:26,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:43:26,410 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:43:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:43:26,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668568343] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:43:26,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [887969312] [2024-11-09 05:43:26,464 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 05:43:26,464 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:43:26,464 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:43:26,464 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:43:26,465 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:43:27,711 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:43:29,152 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15543#(and (= ~pc1~0 1) (= ~S~0.base 0) (exists ((|v_ULTIMATE.start_main_old_#valid#1_15| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_15| |#valid|))) (= ~pc4~0 1) (= ~S~0.offset 0) (= ~garbage~0.offset 0) (= 0 ~garbage~0.base) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-09 05:43:29,153 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:43:29,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:43:29,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2024-11-09 05:43:29,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244963011] [2024-11-09 05:43:29,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:43:29,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 05:43:29,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:29,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 05:43:29,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=361, Unknown=1, NotChecked=0, Total=420 [2024-11-09 05:43:29,155 INFO L87 Difference]: Start difference. First operand 1219 states and 1663 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:29,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:29,490 INFO L93 Difference]: Finished difference Result 1619 states and 2139 transitions. [2024-11-09 05:43:29,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 05:43:29,490 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-09 05:43:29,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:29,495 INFO L225 Difference]: With dead ends: 1619 [2024-11-09 05:43:29,495 INFO L226 Difference]: Without dead ends: 1619 [2024-11-09 05:43:29,496 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=94, Invalid=555, Unknown=1, NotChecked=0, Total=650 [2024-11-09 05:43:29,496 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 70 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:29,497 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 270 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:43:29,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2024-11-09 05:43:29,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1557. [2024-11-09 05:43:29,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1545 states have (on average 1.3482200647249192) internal successors, (2083), 1556 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:29,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 2083 transitions. [2024-11-09 05:43:29,524 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 2083 transitions. Word has length 35 [2024-11-09 05:43:29,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:29,525 INFO L471 AbstractCegarLoop]: Abstraction has 1557 states and 2083 transitions. [2024-11-09 05:43:29,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:29,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 2083 transitions. [2024-11-09 05:43:29,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-09 05:43:29,526 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:29,526 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:29,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 05:43:29,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:29,727 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:43:29,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:29,727 INFO L85 PathProgramCache]: Analyzing trace with hash -314194208, now seen corresponding path program 1 times [2024-11-09 05:43:29,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:29,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784621431] [2024-11-09 05:43:29,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:29,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:43:29,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:29,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784621431] [2024-11-09 05:43:29,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784621431] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:29,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661954212] [2024-11-09 05:43:29,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:29,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:29,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:29,938 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:29,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 05:43:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:30,063 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:43:30,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:43:30,121 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:43:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:43:30,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661954212] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:43:30,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [483270592] [2024-11-09 05:43:30,219 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 05:43:30,219 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:43:30,219 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:43:30,220 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:43:30,220 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:43:32,298 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:43:34,735 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18998#(not (= (select |#valid| ~t4~0.base) 1))' at error location [2024-11-09 05:43:34,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:43:34,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:43:34,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2024-11-09 05:43:34,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274651639] [2024-11-09 05:43:34,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:43:34,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 05:43:34,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:34,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 05:43:34,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=257, Unknown=3, NotChecked=0, Total=306 [2024-11-09 05:43:34,737 INFO L87 Difference]: Start difference. First operand 1557 states and 2083 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:35,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:35,144 INFO L93 Difference]: Finished difference Result 2998 states and 3985 transitions. [2024-11-09 05:43:35,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 05:43:35,145 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 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 42 [2024-11-09 05:43:35,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:35,151 INFO L225 Difference]: With dead ends: 2998 [2024-11-09 05:43:35,151 INFO L226 Difference]: Without dead ends: 2998 [2024-11-09 05:43:35,152 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=152, Invalid=657, Unknown=3, NotChecked=0, Total=812 [2024-11-09 05:43:35,152 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 147 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:35,153 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 283 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:43:35,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2998 states. [2024-11-09 05:43:35,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2998 to 2523. [2024-11-09 05:43:35,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2523 states, 2511 states have (on average 1.3616089207487057) internal successors, (3419), 2522 states have internal predecessors, (3419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:35,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2523 states to 2523 states and 3419 transitions. [2024-11-09 05:43:35,202 INFO L78 Accepts]: Start accepts. Automaton has 2523 states and 3419 transitions. Word has length 42 [2024-11-09 05:43:35,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:35,202 INFO L471 AbstractCegarLoop]: Abstraction has 2523 states and 3419 transitions. [2024-11-09 05:43:35,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:35,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2523 states and 3419 transitions. [2024-11-09 05:43:35,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 05:43:35,203 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:35,204 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:35,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 05:43:35,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-09 05:43:35,405 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:43:35,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:35,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1335809938, now seen corresponding path program 1 times [2024-11-09 05:43:35,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:35,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456096013] [2024-11-09 05:43:35,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:35,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 48 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:43:35,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:35,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456096013] [2024-11-09 05:43:35,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456096013] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:35,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190297743] [2024-11-09 05:43:35,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:35,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:35,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:35,937 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:35,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 05:43:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:36,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 05:43:36,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 40 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 05:43:36,431 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:43:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 18 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 05:43:37,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190297743] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:43:37,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [291011316] [2024-11-09 05:43:37,203 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 05:43:37,203 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:43:37,204 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:43:37,204 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:43:37,204 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:43:38,116 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:43:39,747 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24828#(and (= ~pc1~0 1) (= ~S~0.base 0) (= ~pc4~0 1) (= ~S~0.offset 0) (= ~garbage~0.offset 0) (exists ((|v_ULTIMATE.start_main_old_#valid#1_16| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_16| |#valid|))) (= 0 ~garbage~0.base) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-09 05:43:39,747 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:43:39,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:43:39,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2024-11-09 05:43:39,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132374809] [2024-11-09 05:43:39,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:43:39,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 05:43:39,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:39,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 05:43:39,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=883, Unknown=1, NotChecked=0, Total=992 [2024-11-09 05:43:39,750 INFO L87 Difference]: Start difference. First operand 2523 states and 3419 transitions. Second operand has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:42,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:42,655 INFO L93 Difference]: Finished difference Result 6209 states and 8277 transitions. [2024-11-09 05:43:42,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-09 05:43:42,656 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 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 44 [2024-11-09 05:43:42,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:42,674 INFO L225 Difference]: With dead ends: 6209 [2024-11-09 05:43:42,674 INFO L226 Difference]: Without dead ends: 6209 [2024-11-09 05:43:42,676 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=786, Invalid=4183, Unknown=1, NotChecked=0, Total=4970 [2024-11-09 05:43:42,677 INFO L432 NwaCegarLoop]: 120 mSDtfsCounter, 636 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:42,678 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [636 Valid, 1009 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 05:43:42,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6209 states. [2024-11-09 05:43:42,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6209 to 4284. [2024-11-09 05:43:42,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4284 states, 4272 states have (on average 1.37125468164794) internal successors, (5858), 4283 states have internal predecessors, (5858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:42,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4284 states to 4284 states and 5858 transitions. [2024-11-09 05:43:42,772 INFO L78 Accepts]: Start accepts. Automaton has 4284 states and 5858 transitions. Word has length 44 [2024-11-09 05:43:42,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:42,773 INFO L471 AbstractCegarLoop]: Abstraction has 4284 states and 5858 transitions. [2024-11-09 05:43:42,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:42,773 INFO L276 IsEmpty]: Start isEmpty. Operand 4284 states and 5858 transitions. [2024-11-09 05:43:42,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-09 05:43:42,774 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:42,775 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:42,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 05:43:42,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 05:43:42,976 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:43:42,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:42,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1823667912, now seen corresponding path program 1 times [2024-11-09 05:43:42,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:42,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022158493] [2024-11-09 05:43:42,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:42,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:43,855 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 55 proven. 52 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:43:43,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:43,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022158493] [2024-11-09 05:43:43,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022158493] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:43,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701945892] [2024-11-09 05:43:43,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:43,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:43,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:43,858 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:43,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 05:43:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:44,014 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 05:43:44,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:44,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 05:43:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 47 proven. 62 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:43:44,852 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:43:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 25 proven. 84 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:43:46,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701945892] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:43:46,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [552296320] [2024-11-09 05:43:46,431 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 05:43:46,432 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:43:46,432 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:43:46,432 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:43:46,432 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:43:47,929 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:43:49,089 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35789#(and (= ~pc4~0 4) (or (< (+ ~t4~0.offset 4) 0) (< (select |#length| ~t4~0.base) (+ ~t4~0.offset 8))) (= |ULTIMATE.start_pop_#t~post6#1| 3))' at error location [2024-11-09 05:43:49,089 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:43:49,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:43:49,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2024-11-09 05:43:49,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469674695] [2024-11-09 05:43:49,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:43:49,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 05:43:49,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:49,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 05:43:49,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 05:43:49,092 INFO L87 Difference]: Start difference. First operand 4284 states and 5858 transitions. Second operand has 23 states, 22 states have (on average 4.818181818181818) internal successors, (106), 23 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:55,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:55,682 INFO L93 Difference]: Finished difference Result 8191 states and 11119 transitions. [2024-11-09 05:43:55,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-09 05:43:55,683 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.818181818181818) internal successors, (106), 23 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-11-09 05:43:55,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:55,704 INFO L225 Difference]: With dead ends: 8191 [2024-11-09 05:43:55,705 INFO L226 Difference]: Without dead ends: 8191 [2024-11-09 05:43:55,707 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1897 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1350, Invalid=6660, Unknown=0, NotChecked=0, Total=8010 [2024-11-09 05:43:55,708 INFO L432 NwaCegarLoop]: 112 mSDtfsCounter, 679 mSDsluCounter, 1261 mSDsCounter, 0 mSdLazyCounter, 1950 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:55,708 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 1373 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1950 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-09 05:43:55,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8191 states. [2024-11-09 05:43:55,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8191 to 7609. [2024-11-09 05:43:55,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7609 states, 7597 states have (on average 1.3896274845333685) internal successors, (10557), 7608 states have internal predecessors, (10557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:55,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7609 states to 7609 states and 10557 transitions. [2024-11-09 05:43:55,844 INFO L78 Accepts]: Start accepts. Automaton has 7609 states and 10557 transitions. Word has length 57 [2024-11-09 05:43:55,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:55,845 INFO L471 AbstractCegarLoop]: Abstraction has 7609 states and 10557 transitions. [2024-11-09 05:43:55,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.818181818181818) internal successors, (106), 23 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:55,845 INFO L276 IsEmpty]: Start isEmpty. Operand 7609 states and 10557 transitions. [2024-11-09 05:43:55,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-09 05:43:55,846 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:55,846 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:55,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 05:43:56,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:56,047 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:43:56,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:56,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1823667911, now seen corresponding path program 1 times [2024-11-09 05:43:56,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:56,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471166188] [2024-11-09 05:43:56,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:56,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 55 proven. 52 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:43:56,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:56,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471166188] [2024-11-09 05:43:56,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471166188] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:56,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107244545] [2024-11-09 05:43:56,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:56,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:56,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:56,651 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:56,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 05:43:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:56,803 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 05:43:56,805 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:57,291 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 47 proven. 62 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:43:57,291 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:43:58,375 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 25 proven. 84 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:43:58,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107244545] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:43:58,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [711270156] [2024-11-09 05:43:58,376 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 05:43:58,377 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:43:58,377 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:43:58,377 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:43:58,377 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:44:00,015 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:44:01,058 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '52098#(and (= ~pc4~0 4) (not (= (select |#valid| ~t4~0.base) 1)) (= |ULTIMATE.start_pop_#t~post6#1| 3))' at error location [2024-11-09 05:44:01,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:44:01,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:44:01,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-11-09 05:44:01,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88026751] [2024-11-09 05:44:01,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:44:01,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 05:44:01,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:44:01,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 05:44:01,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=899, Unknown=1, NotChecked=0, Total=992 [2024-11-09 05:44:01,061 INFO L87 Difference]: Start difference. First operand 7609 states and 10557 transitions. Second operand has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:44:05,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:44:05,254 INFO L93 Difference]: Finished difference Result 8916 states and 12136 transitions. [2024-11-09 05:44:05,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-09 05:44:05,255 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-11-09 05:44:05,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:44:05,272 INFO L225 Difference]: With dead ends: 8916 [2024-11-09 05:44:05,272 INFO L226 Difference]: Without dead ends: 8916 [2024-11-09 05:44:05,273 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=654, Invalid=3635, Unknown=1, NotChecked=0, Total=4290 [2024-11-09 05:44:05,274 INFO L432 NwaCegarLoop]: 115 mSDtfsCounter, 460 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:44:05,274 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 991 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1390 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-09 05:44:05,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8916 states. [2024-11-09 05:44:05,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8916 to 8606. [2024-11-09 05:44:05,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8606 states, 8595 states have (on average 1.380802792321117) internal successors, (11868), 8605 states have internal predecessors, (11868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:44:05,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8606 states to 8606 states and 11868 transitions. [2024-11-09 05:44:05,393 INFO L78 Accepts]: Start accepts. Automaton has 8606 states and 11868 transitions. Word has length 57 [2024-11-09 05:44:05,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:44:05,393 INFO L471 AbstractCegarLoop]: Abstraction has 8606 states and 11868 transitions. [2024-11-09 05:44:05,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:44:05,394 INFO L276 IsEmpty]: Start isEmpty. Operand 8606 states and 11868 transitions. [2024-11-09 05:44:05,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-09 05:44:05,396 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:44:05,396 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:44:05,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-09 05:44:05,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:44:05,601 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:44:05,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:44:05,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1135827700, now seen corresponding path program 1 times [2024-11-09 05:44:05,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:44:05,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798529501] [2024-11-09 05:44:05,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:05,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:44:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 91 proven. 1 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-09 05:44:05,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:44:05,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798529501] [2024-11-09 05:44:05,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798529501] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:44:05,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551781672] [2024-11-09 05:44:05,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:05,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:44:05,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:44:05,806 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:44:05,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 05:44:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:05,961 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:44:05,963 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:44:06,028 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 91 proven. 1 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-09 05:44:06,028 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:44:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 91 proven. 1 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-09 05:44:06,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551781672] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:44:06,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [415022210] [2024-11-09 05:44:06,061 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 05:44:06,062 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:44:06,062 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:44:06,062 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:44:06,062 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:44:08,647 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:44:11,083 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '70079#(not (= (select |#valid| ~t4~0.base) 1))' at error location [2024-11-09 05:44:11,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:44:11,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:44:11,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2024-11-09 05:44:11,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745989562] [2024-11-09 05:44:11,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:44:11,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:44:11,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:44:11,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:44:11,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=175, Unknown=3, NotChecked=0, Total=210 [2024-11-09 05:44:11,086 INFO L87 Difference]: Start difference. First operand 8606 states and 11868 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:44:11,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:44:11,281 INFO L93 Difference]: Finished difference Result 6293 states and 8762 transitions. [2024-11-09 05:44:11,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 05:44:11,281 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 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 59 [2024-11-09 05:44:11,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:44:11,291 INFO L225 Difference]: With dead ends: 6293 [2024-11-09 05:44:11,291 INFO L226 Difference]: Without dead ends: 6293 [2024-11-09 05:44:11,291 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 166 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=47, Invalid=256, Unknown=3, NotChecked=0, Total=306 [2024-11-09 05:44:11,292 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 33 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:44:11,292 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 337 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:44:11,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6293 states. [2024-11-09 05:44:11,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6293 to 6212. [2024-11-09 05:44:11,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6212 states, 6201 states have (on average 1.3997742299629092) internal successors, (8680), 6211 states have internal predecessors, (8680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:44:11,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6212 states to 6212 states and 8680 transitions. [2024-11-09 05:44:11,380 INFO L78 Accepts]: Start accepts. Automaton has 6212 states and 8680 transitions. Word has length 59 [2024-11-09 05:44:11,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:44:11,381 INFO L471 AbstractCegarLoop]: Abstraction has 6212 states and 8680 transitions. [2024-11-09 05:44:11,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:44:11,381 INFO L276 IsEmpty]: Start isEmpty. Operand 6212 states and 8680 transitions. [2024-11-09 05:44:11,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-09 05:44:11,383 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:44:11,383 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:44:11,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 05:44:11,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:44:11,588 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:44:11,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:44:11,588 INFO L85 PathProgramCache]: Analyzing trace with hash -270707450, now seen corresponding path program 1 times [2024-11-09 05:44:11,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:44:11,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788080688] [2024-11-09 05:44:11,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:11,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:44:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 74 proven. 1 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-11-09 05:44:11,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:44:11,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788080688] [2024-11-09 05:44:11,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788080688] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:44:11,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610308419] [2024-11-09 05:44:11,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:11,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:44:11,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:44:11,866 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:44:11,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 05:44:12,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:12,048 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-09 05:44:12,051 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:44:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 90 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 05:44:12,963 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:44:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 55 proven. 47 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-09 05:44:13,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610308419] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:44:13,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [214903616] [2024-11-09 05:44:13,294 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-09 05:44:13,294 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:44:13,294 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:44:13,294 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:44:13,294 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:44:14,794 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:44:16,214 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '83030#(and (exists ((|v_ULTIMATE.start_main_old_#valid#1_17| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_17| |#valid|))) (= ~garbage~0.offset 0) (= 0 ~garbage~0.base) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-09 05:44:16,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:44:16,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:44:16,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15, 8] total 24 [2024-11-09 05:44:16,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651868106] [2024-11-09 05:44:16,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:44:16,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 05:44:16,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:44:16,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 05:44:16,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1390, Unknown=1, NotChecked=0, Total=1560 [2024-11-09 05:44:16,216 INFO L87 Difference]: Start difference. First operand 6212 states and 8680 transitions. Second operand has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:44:20,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:44:20,011 INFO L93 Difference]: Finished difference Result 13259 states and 17520 transitions. [2024-11-09 05:44:20,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-09 05:44:20,012 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 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 69 [2024-11-09 05:44:20,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:44:20,037 INFO L225 Difference]: With dead ends: 13259 [2024-11-09 05:44:20,038 INFO L226 Difference]: Without dead ends: 13259 [2024-11-09 05:44:20,040 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2228 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=865, Invalid=6790, Unknown=1, NotChecked=0, Total=7656 [2024-11-09 05:44:20,041 INFO L432 NwaCegarLoop]: 147 mSDtfsCounter, 550 mSDsluCounter, 1686 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1833 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:44:20,041 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 1833 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-09 05:44:20,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13259 states. [2024-11-09 05:44:20,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13259 to 12148. [2024-11-09 05:44:20,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12148 states, 12137 states have (on average 1.3286644145999835) internal successors, (16126), 12147 states have internal predecessors, (16126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:44:20,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12148 states to 12148 states and 16126 transitions. [2024-11-09 05:44:20,207 INFO L78 Accepts]: Start accepts. Automaton has 12148 states and 16126 transitions. Word has length 69 [2024-11-09 05:44:20,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:44:20,208 INFO L471 AbstractCegarLoop]: Abstraction has 12148 states and 16126 transitions. [2024-11-09 05:44:20,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:44:20,208 INFO L276 IsEmpty]: Start isEmpty. Operand 12148 states and 16126 transitions. [2024-11-09 05:44:20,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-09 05:44:20,209 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:44:20,210 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:44:20,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-09 05:44:20,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-09 05:44:20,410 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:44:20,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:44:20,411 INFO L85 PathProgramCache]: Analyzing trace with hash 939178708, now seen corresponding path program 1 times [2024-11-09 05:44:20,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:44:20,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350626745] [2024-11-09 05:44:20,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:20,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:44:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 82 proven. 38 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-09 05:44:20,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:44:20,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350626745] [2024-11-09 05:44:20,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350626745] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:44:20,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132697312] [2024-11-09 05:44:20,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:20,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:44:20,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:44:20,939 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:44:20,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 05:44:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:21,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 05:44:21,127 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:44:21,749 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 82 proven. 53 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-09 05:44:21,749 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:44:22,325 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 69 proven. 14 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2024-11-09 05:44:22,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132697312] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:44:22,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [992665629] [2024-11-09 05:44:22,327 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-09 05:44:22,327 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:44:22,328 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:44:22,328 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:44:22,328 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:44:24,177 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:44:25,655 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '108999#(and (= ~garbage~0.offset 0) (exists ((|v_ULTIMATE.start_main_old_#valid#1_18| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_18| |#valid|))) (= 0 ~garbage~0.base) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-09 05:44:25,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:44:25,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:44:25,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 7] total 22 [2024-11-09 05:44:25,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799326365] [2024-11-09 05:44:25,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:44:25,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 05:44:25,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:44:25,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 05:44:25,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 05:44:25,658 INFO L87 Difference]: Start difference. First operand 12148 states and 16126 transitions. Second operand has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:44:40,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:44:40,495 INFO L93 Difference]: Finished difference Result 25214 states and 32654 transitions. [2024-11-09 05:44:40,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2024-11-09 05:44:40,496 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2024-11-09 05:44:40,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:44:40,541 INFO L225 Difference]: With dead ends: 25214 [2024-11-09 05:44:40,541 INFO L226 Difference]: Without dead ends: 25214 [2024-11-09 05:44:40,547 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 12678 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=2242, Invalid=34048, Unknown=0, NotChecked=0, Total=36290 [2024-11-09 05:44:40,548 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 500 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 3458 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 3554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 3458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:44:40,548 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 1385 Invalid, 3554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 3458 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-11-09 05:44:40,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25214 states. [2024-11-09 05:44:40,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25214 to 20532. [2024-11-09 05:44:40,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20532 states, 20521 states have (on average 1.3055893962282539) internal successors, (26792), 20531 states have internal predecessors, (26792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:44:40,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20532 states to 20532 states and 26792 transitions. [2024-11-09 05:44:40,848 INFO L78 Accepts]: Start accepts. Automaton has 20532 states and 26792 transitions. Word has length 71 [2024-11-09 05:44:40,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:44:40,849 INFO L471 AbstractCegarLoop]: Abstraction has 20532 states and 26792 transitions. [2024-11-09 05:44:40,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:44:40,849 INFO L276 IsEmpty]: Start isEmpty. Operand 20532 states and 26792 transitions. [2024-11-09 05:44:40,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-09 05:44:40,851 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:44:40,852 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 6, 6, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:44:40,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-09 05:44:41,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-09 05:44:41,056 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:44:41,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:44:41,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1965296889, now seen corresponding path program 2 times [2024-11-09 05:44:41,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:44:41,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134119462] [2024-11-09 05:44:41,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:41,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:44:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:42,169 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 107 proven. 87 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 05:44:42,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:44:42,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134119462] [2024-11-09 05:44:42,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134119462] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:44:42,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339626318] [2024-11-09 05:44:42,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:44:42,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:44:42,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:44:42,171 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:44:42,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 05:44:42,343 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 05:44:42,343 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:44:42,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 05:44:42,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:44:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 72 proven. 92 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 05:44:43,837 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:44:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 34 proven. 130 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 05:44:44,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339626318] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:44:44,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1079214805] [2024-11-09 05:44:44,990 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-09 05:44:44,990 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:44:44,991 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:44:44,991 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:44:44,991 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:44:47,114 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:44:48,741 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '155601#(and (exists ((|v_ULTIMATE.start_main_old_#valid#1_19| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_19| |#valid|))) (= ~garbage~0.offset 0) (= 0 ~garbage~0.base) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-09 05:44:48,741 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:44:48,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:44:48,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 32 [2024-11-09 05:44:48,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353690401] [2024-11-09 05:44:48,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:44:48,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 05:44:48,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:44:48,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 05:44:48,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2127, Unknown=1, NotChecked=0, Total=2352 [2024-11-09 05:44:48,743 INFO L87 Difference]: Start difference. First operand 20532 states and 26792 transitions. Second operand has 32 states, 32 states have (on average 4.59375) internal successors, (147), 32 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:45:37,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:45:37,182 INFO L93 Difference]: Finished difference Result 46803 states and 60465 transitions. [2024-11-09 05:45:37,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 450 states. [2024-11-09 05:45:37,183 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.59375) internal successors, (147), 32 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2024-11-09 05:45:37,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:45:37,287 INFO L225 Difference]: With dead ends: 46803 [2024-11-09 05:45:37,288 INFO L226 Difference]: Without dead ends: 45607 [2024-11-09 05:45:37,308 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 493 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 106924 ImplicationChecksByTransitivity, 42.7s TimeCoverageRelationStatistics Valid=24669, Invalid=219860, Unknown=1, NotChecked=0, Total=244530 [2024-11-09 05:45:37,309 INFO L432 NwaCegarLoop]: 174 mSDtfsCounter, 2537 mSDsluCounter, 2155 mSDsCounter, 0 mSdLazyCounter, 5475 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2537 SdHoareTripleChecker+Valid, 2329 SdHoareTripleChecker+Invalid, 5919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 5475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:45:37,309 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2537 Valid, 2329 Invalid, 5919 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [444 Valid, 5475 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2024-11-09 05:45:37,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45607 states. [2024-11-09 05:45:37,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45607 to 28859. [2024-11-09 05:45:37,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28859 states, 28848 states have (on average 1.3046658347199112) internal successors, (37637), 28858 states have internal predecessors, (37637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:45:37,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28859 states to 28859 states and 37637 transitions. [2024-11-09 05:45:37,721 INFO L78 Accepts]: Start accepts. Automaton has 28859 states and 37637 transitions. Word has length 79 [2024-11-09 05:45:37,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:45:37,722 INFO L471 AbstractCegarLoop]: Abstraction has 28859 states and 37637 transitions. [2024-11-09 05:45:37,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.59375) internal successors, (147), 32 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:45:37,722 INFO L276 IsEmpty]: Start isEmpty. Operand 28859 states and 37637 transitions. [2024-11-09 05:45:37,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-09 05:45:37,725 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:45:37,725 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 7, 6, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:45:37,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-09 05:45:37,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 05:45:37,926 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:45:37,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:45:37,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1091893794, now seen corresponding path program 1 times [2024-11-09 05:45:37,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:45:37,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824082252] [2024-11-09 05:45:37,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:45:37,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:45:37,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:45:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 168 proven. 15 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-11-09 05:45:38,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:45:38,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824082252] [2024-11-09 05:45:38,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824082252] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:45:38,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245055940] [2024-11-09 05:45:38,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:45:38,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:45:38,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:45:38,291 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:45:38,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 05:45:38,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:45:38,498 INFO L255 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 05:45:38,499 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:45:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 168 proven. 15 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-11-09 05:45:38,739 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:45:38,975 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 163 proven. 20 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-11-09 05:45:38,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245055940] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:45:38,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [28640799] [2024-11-09 05:45:38,977 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 05:45:38,977 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:45:38,977 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:45:38,978 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:45:38,978 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:45:40,546 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:45:41,488 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '232819#(and (= ~pc4~0 4) (or (< (+ ~t4~0.offset 4) 0) (< (select |#length| ~t4~0.base) (+ ~t4~0.offset 8))) (= |ULTIMATE.start_pop_#t~post6#1| 3))' at error location [2024-11-09 05:45:41,489 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:45:41,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:45:41,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-09 05:45:41,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485309307] [2024-11-09 05:45:41,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:45:41,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 05:45:41,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:45:41,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 05:45:41,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2024-11-09 05:45:41,491 INFO L87 Difference]: Start difference. First operand 28859 states and 37637 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:45:42,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:45:42,449 INFO L93 Difference]: Finished difference Result 46681 states and 60348 transitions. [2024-11-09 05:45:42,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 05:45:42,449 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 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 84 [2024-11-09 05:45:42,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:45:42,488 INFO L225 Difference]: With dead ends: 46681 [2024-11-09 05:45:42,488 INFO L226 Difference]: Without dead ends: 46681 [2024-11-09 05:45:42,488 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 05:45:42,489 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 197 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:45:42,489 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 718 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:45:42,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46681 states. [2024-11-09 05:45:42,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46681 to 44555. [2024-11-09 05:45:42,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44555 states, 44544 states have (on average 1.2967178520114941) internal successors, (57761), 44554 states have internal predecessors, (57761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:45:42,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44555 states to 44555 states and 57761 transitions. [2024-11-09 05:45:42,946 INFO L78 Accepts]: Start accepts. Automaton has 44555 states and 57761 transitions. Word has length 84 [2024-11-09 05:45:42,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:45:42,947 INFO L471 AbstractCegarLoop]: Abstraction has 44555 states and 57761 transitions. [2024-11-09 05:45:42,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:45:42,947 INFO L276 IsEmpty]: Start isEmpty. Operand 44555 states and 57761 transitions. [2024-11-09 05:45:42,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-09 05:45:42,951 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:45:42,952 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:45:42,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-09 05:45:43,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 05:45:43,156 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:45:43,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:45:43,156 INFO L85 PathProgramCache]: Analyzing trace with hash 262563197, now seen corresponding path program 3 times [2024-11-09 05:45:43,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:45:43,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73548531] [2024-11-09 05:45:43,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:45:43,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:45:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:45:43,652 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 155 proven. 20 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-09 05:45:43,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:45:43,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73548531] [2024-11-09 05:45:43,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73548531] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:45:43,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644002365] [2024-11-09 05:45:43,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:45:43,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:45:43,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:45:43,656 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:45:43,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 05:45:43,847 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:45:43,847 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:45:43,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 05:45:43,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:45:44,207 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 161 proven. 24 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-09 05:45:44,207 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:45:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 134 proven. 14 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2024-11-09 05:45:44,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644002365] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:45:44,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [446172680] [2024-11-09 05:45:44,580 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-09 05:45:44,580 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:45:44,580 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:45:44,580 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:45:44,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:45:46,181 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:45:47,457 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '324628#(and (= ~garbage~0.offset 0) (exists ((|v_ULTIMATE.start_main_old_#valid#1_20| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_20| |#valid|))) (= 0 ~garbage~0.base) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-09 05:45:47,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:45:47,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:45:47,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 20 [2024-11-09 05:45:47,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178498498] [2024-11-09 05:45:47,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:45:47,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 05:45:47,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:45:47,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 05:45:47,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1197, Unknown=1, NotChecked=0, Total=1332 [2024-11-09 05:45:47,459 INFO L87 Difference]: Start difference. First operand 44555 states and 57761 transitions. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:45:50,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:45:50,275 INFO L93 Difference]: Finished difference Result 49197 states and 62157 transitions. [2024-11-09 05:45:50,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-09 05:45:50,276 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2024-11-09 05:45:50,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:45:50,321 INFO L225 Difference]: With dead ends: 49197 [2024-11-09 05:45:50,321 INFO L226 Difference]: Without dead ends: 49197 [2024-11-09 05:45:50,322 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1591 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=902, Invalid=5259, Unknown=1, NotChecked=0, Total=6162 [2024-11-09 05:45:50,323 INFO L432 NwaCegarLoop]: 120 mSDtfsCounter, 784 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:45:50,323 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [784 Valid, 1115 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 05:45:50,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49197 states. [2024-11-09 05:45:50,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49197 to 36777. [2024-11-09 05:45:50,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36777 states, 36766 states have (on average 1.284637980743078) internal successors, (47231), 36776 states have internal predecessors, (47231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:45:50,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36777 states to 36777 states and 47231 transitions. [2024-11-09 05:45:50,709 INFO L78 Accepts]: Start accepts. Automaton has 36777 states and 47231 transitions. Word has length 87 [2024-11-09 05:45:50,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:45:50,710 INFO L471 AbstractCegarLoop]: Abstraction has 36777 states and 47231 transitions. [2024-11-09 05:45:50,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:45:50,710 INFO L276 IsEmpty]: Start isEmpty. Operand 36777 states and 47231 transitions. [2024-11-09 05:45:50,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-09 05:45:50,715 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:45:50,715 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:45:50,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-09 05:45:50,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:45:50,916 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:45:50,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:45:50,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1835243122, now seen corresponding path program 1 times [2024-11-09 05:45:50,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:45:50,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280256305] [2024-11-09 05:45:50,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:45:50,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:45:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:45:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 90 proven. 6 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2024-11-09 05:45:51,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:45:51,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280256305] [2024-11-09 05:45:51,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280256305] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:45:51,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941443689] [2024-11-09 05:45:51,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:45:51,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:45:51,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:45:51,050 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:45:51,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 05:45:51,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:45:51,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 05:45:51,288 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:45:52,258 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 69 proven. 153 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-09 05:45:52,258 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:45:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 37 proven. 185 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-09 05:45:54,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941443689] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:45:54,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1521430734] [2024-11-09 05:45:54,035 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 05:45:54,036 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:45:54,037 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:45:54,037 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:45:54,037 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:45:55,566 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:45:56,903 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '411270#(and (or (not (= ~garbage~0.offset 0)) (not (= 0 ~garbage~0.base))) (not (= (select |#valid| ~garbage~0.base) 1)))' at error location [2024-11-09 05:45:56,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:45:56,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:45:56,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 12, 12] total 19 [2024-11-09 05:45:56,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062906795] [2024-11-09 05:45:56,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:45:56,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 05:45:56,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:45:56,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 05:45:56,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1365, Unknown=1, NotChecked=0, Total=1482 [2024-11-09 05:45:56,905 INFO L87 Difference]: Start difference. First operand 36777 states and 47231 transitions. Second operand has 20 states, 19 states have (on average 6.2105263157894735) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:46:05,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:46:05,702 INFO L93 Difference]: Finished difference Result 38252 states and 48846 transitions. [2024-11-09 05:46:05,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-11-09 05:46:05,703 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 6.2105263157894735) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 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 90 [2024-11-09 05:46:05,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:46:05,740 INFO L225 Difference]: With dead ends: 38252 [2024-11-09 05:46:05,740 INFO L226 Difference]: Without dead ends: 38252 [2024-11-09 05:46:05,742 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3922 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1843, Invalid=12918, Unknown=1, NotChecked=0, Total=14762 [2024-11-09 05:46:05,742 INFO L432 NwaCegarLoop]: 180 mSDtfsCounter, 623 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 3167 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 1854 SdHoareTripleChecker+Invalid, 3204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-09 05:46:05,742 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 1854 Invalid, 3204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 3167 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-09 05:46:05,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38252 states. [2024-11-09 05:46:05,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38252 to 36779. [2024-11-09 05:46:06,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36779 states, 36769 states have (on average 1.2846691506432049) internal successors, (47236), 36778 states have internal predecessors, (47236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:46:06,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36779 states to 36779 states and 47236 transitions. [2024-11-09 05:46:06,064 INFO L78 Accepts]: Start accepts. Automaton has 36779 states and 47236 transitions. Word has length 90 [2024-11-09 05:46:06,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:46:06,064 INFO L471 AbstractCegarLoop]: Abstraction has 36779 states and 47236 transitions. [2024-11-09 05:46:06,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 6.2105263157894735) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:46:06,064 INFO L276 IsEmpty]: Start isEmpty. Operand 36779 states and 47236 transitions. [2024-11-09 05:46:06,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-09 05:46:06,068 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:46:06,068 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:46:06,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-09 05:46:06,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:46:06,269 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:46:06,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:46:06,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1835243123, now seen corresponding path program 1 times [2024-11-09 05:46:06,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:46:06,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985835381] [2024-11-09 05:46:06,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:46:06,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:46:06,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:46:06,484 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 90 proven. 6 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2024-11-09 05:46:06,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:46:06,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985835381] [2024-11-09 05:46:06,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985835381] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:46:06,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505289210] [2024-11-09 05:46:06,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:46:06,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:46:06,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:46:06,488 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:46:06,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-09 05:46:06,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:46:06,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-09 05:46:06,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:46:06,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 05:46:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 69 proven. 153 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-09 05:46:08,161 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:46:10,678 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 37 proven. 185 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-09 05:46:10,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505289210] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:46:10,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [876239550] [2024-11-09 05:46:10,679 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 05:46:10,680 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:46:10,680 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:46:10,680 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:46:10,680 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:46:12,432 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:46:14,431 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '487077#(and (or (not (= ~garbage~0.offset 0)) (not (= 0 ~garbage~0.base))) (or (< (+ ~garbage~0.offset 4) 0) (< (select |#length| ~garbage~0.base) (+ 8 ~garbage~0.offset))))' at error location [2024-11-09 05:46:14,431 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:46:14,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:46:14,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 13, 13] total 28 [2024-11-09 05:46:14,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992190181] [2024-11-09 05:46:14,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:46:14,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 05:46:14,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:46:14,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 05:46:14,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2093, Unknown=1, NotChecked=0, Total=2256 [2024-11-09 05:46:14,434 INFO L87 Difference]: Start difference. First operand 36779 states and 47236 transitions. Second operand has 29 states, 28 states have (on average 6.178571428571429) internal successors, (173), 29 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:47:08,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:47:08,652 INFO L93 Difference]: Finished difference Result 96242 states and 123733 transitions. [2024-11-09 05:47:08,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 446 states. [2024-11-09 05:47:08,653 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 6.178571428571429) internal successors, (173), 29 states have internal predecessors, (173), 0 states have call successors, (0), 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 90 [2024-11-09 05:47:08,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:47:08,743 INFO L225 Difference]: With dead ends: 96242 [2024-11-09 05:47:08,743 INFO L226 Difference]: Without dead ends: 96242 [2024-11-09 05:47:08,756 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 851 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 485 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98638 ImplicationChecksByTransitivity, 48.9s TimeCoverageRelationStatistics Valid=20907, Invalid=215774, Unknown=1, NotChecked=0, Total=236682 [2024-11-09 05:47:08,757 INFO L432 NwaCegarLoop]: 277 mSDtfsCounter, 1487 mSDsluCounter, 3328 mSDsCounter, 0 mSdLazyCounter, 5085 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 3605 SdHoareTripleChecker+Invalid, 5156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 5085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:47:08,757 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1487 Valid, 3605 Invalid, 5156 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [71 Valid, 5085 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2024-11-09 05:47:08,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96242 states. [2024-11-09 05:47:09,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96242 to 67646. [2024-11-09 05:47:09,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67646 states, 67636 states have (on average 1.2862528830800166) internal successors, (86997), 67645 states have internal predecessors, (86997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:47:09,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67646 states to 67646 states and 86997 transitions. [2024-11-09 05:47:09,565 INFO L78 Accepts]: Start accepts. Automaton has 67646 states and 86997 transitions. Word has length 90 [2024-11-09 05:47:09,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:47:09,565 INFO L471 AbstractCegarLoop]: Abstraction has 67646 states and 86997 transitions. [2024-11-09 05:47:09,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 6.178571428571429) internal successors, (173), 29 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:47:09,566 INFO L276 IsEmpty]: Start isEmpty. Operand 67646 states and 86997 transitions. [2024-11-09 05:47:09,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-09 05:47:09,569 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:47:09,569 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:47:09,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-09 05:47:09,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:47:09,770 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:47:09,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:47:09,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1835259907, now seen corresponding path program 1 times [2024-11-09 05:47:09,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:47:09,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525805593] [2024-11-09 05:47:09,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:47:09,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:47:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:47:10,090 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 115 proven. 9 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2024-11-09 05:47:10,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:47:10,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525805593] [2024-11-09 05:47:10,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525805593] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:47:10,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446493942] [2024-11-09 05:47:10,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:47:10,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:47:10,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:47:10,091 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:47:10,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-09 05:47:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:47:10,310 INFO L255 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 05:47:10,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:47:10,785 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 118 proven. 15 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2024-11-09 05:47:10,785 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:47:11,060 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 115 proven. 9 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2024-11-09 05:47:11,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446493942] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:47:11,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [721627421] [2024-11-09 05:47:11,063 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 05:47:11,063 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:47:11,063 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:47:11,063 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:47:11,063 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:47:12,834 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:47:14,237 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '652553#(and (exists ((|v_ULTIMATE.start_main_old_#valid#1_21| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_21| |#valid|))) (= ~garbage~0.offset 0) (= 0 ~garbage~0.base) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-09 05:47:14,237 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:47:14,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:47:14,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 17 [2024-11-09 05:47:14,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194398143] [2024-11-09 05:47:14,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:47:14,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 05:47:14,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:47:14,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 05:47:14,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1211, Unknown=1, NotChecked=0, Total=1332 [2024-11-09 05:47:14,239 INFO L87 Difference]: Start difference. First operand 67646 states and 86997 transitions. Second operand has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:47:17,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:47:17,195 INFO L93 Difference]: Finished difference Result 149274 states and 193127 transitions. [2024-11-09 05:47:17,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-09 05:47:17,196 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2024-11-09 05:47:17,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:47:17,362 INFO L225 Difference]: With dead ends: 149274 [2024-11-09 05:47:17,362 INFO L226 Difference]: Without dead ends: 149274 [2024-11-09 05:47:17,362 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=652, Invalid=4459, Unknown=1, NotChecked=0, Total=5112 [2024-11-09 05:47:17,363 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 476 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:47:17,363 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 517 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 05:47:17,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149274 states. [2024-11-09 05:47:18,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149274 to 143134. [2024-11-09 05:47:19,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143134 states, 143124 states have (on average 1.2975601576255555) internal successors, (185712), 143133 states have internal predecessors, (185712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:47:19,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143134 states to 143134 states and 185712 transitions. [2024-11-09 05:47:19,673 INFO L78 Accepts]: Start accepts. Automaton has 143134 states and 185712 transitions. Word has length 90 [2024-11-09 05:47:19,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:47:19,673 INFO L471 AbstractCegarLoop]: Abstraction has 143134 states and 185712 transitions. [2024-11-09 05:47:19,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:47:19,674 INFO L276 IsEmpty]: Start isEmpty. Operand 143134 states and 185712 transitions. [2024-11-09 05:47:19,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-09 05:47:19,677 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:47:19,677 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 6, 6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:47:19,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-09 05:47:19,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:47:19,878 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:47:19,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:47:19,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1161592242, now seen corresponding path program 4 times [2024-11-09 05:47:19,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:47:19,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675393610] [2024-11-09 05:47:19,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:47:19,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:47:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:47:20,967 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 176 proven. 103 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-09 05:47:20,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:47:20,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675393610] [2024-11-09 05:47:20,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675393610] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:47:20,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12893094] [2024-11-09 05:47:20,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:47:20,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:47:20,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:47:20,969 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:47:20,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-09 05:47:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:47:21,195 INFO L255 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-09 05:47:21,199 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:47:22,311 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 84 proven. 183 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-09 05:47:22,311 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:47:24,955 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 47 proven. 220 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-09 05:47:24,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12893094] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:47:24,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1239941220] [2024-11-09 05:47:24,956 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-09 05:47:24,957 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:47:24,957 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:47:24,957 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:47:24,957 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:47:26,669 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:47:28,273 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '945635#(and (exists ((|v_ULTIMATE.start_main_old_#valid#1_22| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_22| |#valid|))) (= ~garbage~0.offset 0) (= 0 ~garbage~0.base) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-09 05:47:28,273 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:47:28,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:47:28,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 43 [2024-11-09 05:47:28,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535077234] [2024-11-09 05:47:28,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:47:28,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-09 05:47:28,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:47:28,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-09 05:47:28,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=3260, Unknown=0, NotChecked=0, Total=3540 [2024-11-09 05:47:28,275 INFO L87 Difference]: Start difference. First operand 143134 states and 185712 transitions. Second operand has 43 states, 43 states have (on average 4.4186046511627906) internal successors, (190), 43 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:48:07,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:48:07,625 INFO L93 Difference]: Finished difference Result 211605 states and 270184 transitions. [2024-11-09 05:48:07,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 396 states. [2024-11-09 05:48:07,626 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.4186046511627906) internal successors, (190), 43 states have internal predecessors, (190), 0 states have call successors, (0), 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 90 [2024-11-09 05:48:07,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:48:07,874 INFO L225 Difference]: With dead ends: 211605 [2024-11-09 05:48:07,874 INFO L226 Difference]: Without dead ends: 211605 [2024-11-09 05:48:07,881 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 447 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 82928 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=16332, Invalid=184820, Unknown=0, NotChecked=0, Total=201152 [2024-11-09 05:48:07,881 INFO L432 NwaCegarLoop]: 145 mSDtfsCounter, 2327 mSDsluCounter, 1964 mSDsCounter, 0 mSdLazyCounter, 8055 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2327 SdHoareTripleChecker+Valid, 2109 SdHoareTripleChecker+Invalid, 8485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 8055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2024-11-09 05:48:07,882 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2327 Valid, 2109 Invalid, 8485 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [430 Valid, 8055 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2024-11-09 05:48:07,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211605 states. [2024-11-09 05:48:09,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211605 to 165149. [2024-11-09 05:48:10,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165149 states, 165139 states have (on average 1.2894289053464052) internal successors, (212935), 165148 states have internal predecessors, (212935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:48:10,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165149 states to 165149 states and 212935 transitions. [2024-11-09 05:48:10,726 INFO L78 Accepts]: Start accepts. Automaton has 165149 states and 212935 transitions. Word has length 90 [2024-11-09 05:48:10,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:48:10,727 INFO L471 AbstractCegarLoop]: Abstraction has 165149 states and 212935 transitions. [2024-11-09 05:48:10,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.4186046511627906) internal successors, (190), 43 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:48:10,727 INFO L276 IsEmpty]: Start isEmpty. Operand 165149 states and 212935 transitions. [2024-11-09 05:48:10,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-09 05:48:10,731 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:48:10,732 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 6, 6, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:48:10,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-09 05:48:10,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-09 05:48:10,932 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:48:10,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:48:10,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1702931620, now seen corresponding path program 1 times [2024-11-09 05:48:10,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:48:10,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427295179] [2024-11-09 05:48:10,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:48:10,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:48:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:48:11,591 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 118 proven. 17 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2024-11-09 05:48:11,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:48:11,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427295179] [2024-11-09 05:48:11,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427295179] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:48:11,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018624215] [2024-11-09 05:48:11,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:48:11,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:48:11,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:48:11,593 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:48:11,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-09 05:48:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:48:11,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:48:11,840 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:48:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 103 proven. 4 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-11-09 05:48:11,975 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:48:12,051 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 103 proven. 4 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-11-09 05:48:12,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018624215] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:48:12,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1290552097] [2024-11-09 05:48:12,054 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-09 05:48:12,054 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:48:12,055 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:48:12,055 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:48:12,055 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:48:14,080 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:48:15,762 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1323851#(and (exists ((|v_ULTIMATE.start_main_old_#valid#1_23| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_23| |#valid|))) (= ~pc1~0 1) (= ~S~0.base 0) (= ~pc4~0 1) (= ~S~0.offset 0) (= ~garbage~0.offset 0) (= 0 ~garbage~0.base) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-09 05:48:15,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:48:15,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:48:15,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-11-09 05:48:15,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812019142] [2024-11-09 05:48:15,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:48:15,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 05:48:15,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:48:15,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 05:48:15,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=994, Unknown=1, NotChecked=0, Total=1122 [2024-11-09 05:48:15,765 INFO L87 Difference]: Start difference. First operand 165149 states and 212935 transitions. Second operand has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:48:19,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:48:19,716 INFO L93 Difference]: Finished difference Result 120768 states and 151031 transitions. [2024-11-09 05:48:19,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-09 05:48:19,717 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2024-11-09 05:48:19,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:48:19,856 INFO L225 Difference]: With dead ends: 120768 [2024-11-09 05:48:19,856 INFO L226 Difference]: Without dead ends: 120768 [2024-11-09 05:48:19,857 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=894, Invalid=5911, Unknown=1, NotChecked=0, Total=6806 [2024-11-09 05:48:19,857 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 518 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:48:19,858 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 859 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 05:48:19,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120768 states. [2024-11-09 05:48:21,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120768 to 85518. [2024-11-09 05:48:21,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85518 states, 85508 states have (on average 1.2604083828413715) internal successors, (107775), 85517 states have internal predecessors, (107775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:48:21,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85518 states to 85518 states and 107775 transitions. [2024-11-09 05:48:21,170 INFO L78 Accepts]: Start accepts. Automaton has 85518 states and 107775 transitions. Word has length 91 [2024-11-09 05:48:21,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:48:21,171 INFO L471 AbstractCegarLoop]: Abstraction has 85518 states and 107775 transitions. [2024-11-09 05:48:21,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:48:21,171 INFO L276 IsEmpty]: Start isEmpty. Operand 85518 states and 107775 transitions. [2024-11-09 05:48:21,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-09 05:48:21,173 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:48:21,173 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:48:21,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-09 05:48:21,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-09 05:48:21,374 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:48:21,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:48:21,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1562894553, now seen corresponding path program 1 times [2024-11-09 05:48:21,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:48:21,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743534863] [2024-11-09 05:48:21,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:48:21,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:48:21,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:48:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 67 proven. 153 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-09 05:48:22,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:48:22,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743534863] [2024-11-09 05:48:22,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743534863] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:48:22,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039880472] [2024-11-09 05:48:22,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:48:22,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:48:22,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:48:22,679 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:48:22,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-09 05:48:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:48:22,961 INFO L255 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 05:48:22,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:48:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 69 proven. 153 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-09 05:48:23,834 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:48:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 37 proven. 185 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-09 05:48:25,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039880472] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:48:25,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [887814992] [2024-11-09 05:48:25,485 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-09 05:48:25,485 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:48:25,485 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:48:25,485 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:48:25,485 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:48:27,149 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:48:28,609 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1530836#(and (= |ULTIMATE.start_main_~next~0#1.base| (select (select |#memory_$Pointer$.base| ~garbage~0.base) 4)) (<= |#StackHeapBarrier| ~garbage~0.base) (= (select |#valid| ~garbage~0.base) 1) (<= 8 (select |#length| ~garbage~0.base)) (= ~garbage~0.offset 0) (= (select (select |#memory_$Pointer$.offset| ~garbage~0.base) 4) |ULTIMATE.start_main_~next~0#1.offset|) (not (= 0 ~garbage~0.base)))' at error location [2024-11-09 05:48:28,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:48:28,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:48:28,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-11-09 05:48:28,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301938684] [2024-11-09 05:48:28,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:48:28,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 05:48:28,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:48:28,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 05:48:28,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1920, Unknown=0, NotChecked=0, Total=2070 [2024-11-09 05:48:28,611 INFO L87 Difference]: Start difference. First operand 85518 states and 107775 transitions. Second operand has 25 states, 24 states have (on average 4.958333333333333) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:48:35,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:48:35,160 INFO L93 Difference]: Finished difference Result 87931 states and 110445 transitions. [2024-11-09 05:48:35,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-11-09 05:48:35,161 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.958333333333333) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 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 92 [2024-11-09 05:48:35,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:48:35,249 INFO L225 Difference]: With dead ends: 87931 [2024-11-09 05:48:35,249 INFO L226 Difference]: Without dead ends: 87931 [2024-11-09 05:48:35,250 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 295 SyntacticMatches, 4 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5238 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2115, Invalid=15177, Unknown=0, NotChecked=0, Total=17292 [2024-11-09 05:48:35,251 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 1650 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1650 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:48:35,251 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1650 Valid, 1092 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 05:48:35,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87931 states. [2024-11-09 05:48:35,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87931 to 85519. [2024-11-09 05:48:35,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85519 states, 85509 states have (on average 1.2604053374498592) internal successors, (107776), 85518 states have internal predecessors, (107776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:48:36,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85519 states to 85519 states and 107776 transitions. [2024-11-09 05:48:36,090 INFO L78 Accepts]: Start accepts. Automaton has 85519 states and 107776 transitions. Word has length 92 [2024-11-09 05:48:36,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:48:36,090 INFO L471 AbstractCegarLoop]: Abstraction has 85519 states and 107776 transitions. [2024-11-09 05:48:36,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.958333333333333) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:48:36,090 INFO L276 IsEmpty]: Start isEmpty. Operand 85519 states and 107776 transitions. [2024-11-09 05:48:36,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-09 05:48:36,092 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:48:36,092 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 6, 6, 6, 6, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:48:36,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-09 05:48:36,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-09 05:48:36,293 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:48:36,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:48:36,294 INFO L85 PathProgramCache]: Analyzing trace with hash -305436114, now seen corresponding path program 1 times [2024-11-09 05:48:36,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:48:36,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287007807] [2024-11-09 05:48:36,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:48:36,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:48:36,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:48:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 117 proven. 7 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2024-11-09 05:48:36,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:48:36,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287007807] [2024-11-09 05:48:36,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287007807] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:48:36,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980437733] [2024-11-09 05:48:36,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:48:36,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:48:36,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:48:36,857 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:48:36,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-09 05:48:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:48:37,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:48:37,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:48:37,185 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 83 proven. 2 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2024-11-09 05:48:37,185 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:48:37,225 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 83 proven. 2 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2024-11-09 05:48:37,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980437733] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:48:37,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2059919203] [2024-11-09 05:48:37,226 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:48:37,226 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:48:37,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:48:37,227 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:48:37,227 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:48:39,001 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:48:40,395 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1705107#(and (= ~pc1~0 1) (= ~S~0.base 0) (= ~pc4~0 1) (exists ((|v_ULTIMATE.start_main_old_#valid#1_24| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_24| |#valid|))) (= ~S~0.offset 0) (= ~garbage~0.offset 0) (= 0 ~garbage~0.base) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-09 05:48:40,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:48:40,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:48:40,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 13 [2024-11-09 05:48:40,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520420708] [2024-11-09 05:48:40,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:48:40,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 05:48:40,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:48:40,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 05:48:40,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=872, Unknown=1, NotChecked=0, Total=992 [2024-11-09 05:48:40,397 INFO L87 Difference]: Start difference. First operand 85519 states and 107776 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:48:41,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:48:41,154 INFO L93 Difference]: Finished difference Result 60705 states and 72759 transitions. [2024-11-09 05:48:41,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 05:48:41,154 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2024-11-09 05:48:41,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:48:41,191 INFO L225 Difference]: With dead ends: 60705 [2024-11-09 05:48:41,191 INFO L226 Difference]: Without dead ends: 43841 [2024-11-09 05:48:41,191 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=302, Invalid=1859, Unknown=1, NotChecked=0, Total=2162 [2024-11-09 05:48:41,192 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 251 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:48:41,192 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 402 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:48:41,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43841 states. [2024-11-09 05:48:41,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43841 to 36385. [2024-11-09 05:48:41,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36385 states, 36375 states have (on average 1.2354089347079038) internal successors, (44938), 36384 states have internal predecessors, (44938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:48:41,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36385 states to 36385 states and 44938 transitions. [2024-11-09 05:48:41,544 INFO L78 Accepts]: Start accepts. Automaton has 36385 states and 44938 transitions. Word has length 94 [2024-11-09 05:48:41,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:48:41,544 INFO L471 AbstractCegarLoop]: Abstraction has 36385 states and 44938 transitions. [2024-11-09 05:48:41,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:48:41,544 INFO L276 IsEmpty]: Start isEmpty. Operand 36385 states and 44938 transitions. [2024-11-09 05:48:41,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-09 05:48:41,546 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:48:41,546 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 8, 7, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:48:41,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-09 05:48:41,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-09 05:48:41,747 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:48:41,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:48:41,747 INFO L85 PathProgramCache]: Analyzing trace with hash 549740710, now seen corresponding path program 1 times [2024-11-09 05:48:41,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:48:41,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065029913] [2024-11-09 05:48:41,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:48:41,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:48:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:48:43,463 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 31 proven. 290 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 05:48:43,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:48:43,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065029913] [2024-11-09 05:48:43,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065029913] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:48:43,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138258059] [2024-11-09 05:48:43,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:48:43,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:48:43,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:48:43,465 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:48:43,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-09 05:48:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:48:43,720 INFO L255 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-09 05:48:43,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:48:44,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 05:48:44,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 05:48:44,889 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 05:48:44,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-09 05:48:44,899 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 05:48:44,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-09 05:48:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 40 proven. 256 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 05:48:45,182 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:48:46,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2024-11-09 05:48:46,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2024-11-09 05:48:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 15 proven. 281 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 05:48:47,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138258059] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:48:47,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [740727812] [2024-11-09 05:48:47,113 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-09 05:48:47,113 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:48:47,114 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:48:47,114 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:48:47,114 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:48:48,557 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:48:50,311 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1802850#(and (= ~pc4~0 4) (or (< (+ ~t4~0.offset 4) 0) (< (select |#length| ~t4~0.base) (+ ~t4~0.offset 8))) (= |ULTIMATE.start_pop_#t~post6#1| 3))' at error location [2024-11-09 05:48:50,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:48:50,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:48:50,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 38 [2024-11-09 05:48:50,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647033675] [2024-11-09 05:48:50,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:48:50,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-09 05:48:50,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:48:50,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-09 05:48:50,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=3101, Unknown=0, NotChecked=0, Total=3306 [2024-11-09 05:48:50,313 INFO L87 Difference]: Start difference. First operand 36385 states and 44938 transitions. Second operand has 39 states, 39 states have (on average 4.717948717948718) internal successors, (184), 38 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:49:27,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:49:27,004 INFO L93 Difference]: Finished difference Result 51726 states and 63162 transitions. [2024-11-09 05:49:27,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 400 states. [2024-11-09 05:49:27,004 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.717948717948718) internal successors, (184), 38 states have internal predecessors, (184), 0 states have call successors, (0), 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 95 [2024-11-09 05:49:27,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:49:27,045 INFO L225 Difference]: With dead ends: 51726 [2024-11-09 05:49:27,045 INFO L226 Difference]: Without dead ends: 51726 [2024-11-09 05:49:27,052 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 445 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83039 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=10803, Invalid=188559, Unknown=0, NotChecked=0, Total=199362 [2024-11-09 05:49:27,053 INFO L432 NwaCegarLoop]: 162 mSDtfsCounter, 1901 mSDsluCounter, 3739 mSDsCounter, 0 mSdLazyCounter, 6576 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1901 SdHoareTripleChecker+Valid, 3901 SdHoareTripleChecker+Invalid, 6825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 6576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2024-11-09 05:49:27,053 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1901 Valid, 3901 Invalid, 6825 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [249 Valid, 6576 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2024-11-09 05:49:27,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51726 states. [2024-11-09 05:49:27,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51726 to 41274. [2024-11-09 05:49:27,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41274 states, 41264 states have (on average 1.2384887553315238) internal successors, (51105), 41273 states have internal predecessors, (51105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:49:27,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41274 states to 41274 states and 51105 transitions. [2024-11-09 05:49:27,472 INFO L78 Accepts]: Start accepts. Automaton has 41274 states and 51105 transitions. Word has length 95 [2024-11-09 05:49:27,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:49:27,472 INFO L471 AbstractCegarLoop]: Abstraction has 41274 states and 51105 transitions. [2024-11-09 05:49:27,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.717948717948718) internal successors, (184), 38 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:49:27,473 INFO L276 IsEmpty]: Start isEmpty. Operand 41274 states and 51105 transitions. [2024-11-09 05:49:27,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-09 05:49:27,475 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:49:27,475 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:49:27,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-09 05:49:27,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-09 05:49:27,676 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-09 05:49:27,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:49:27,676 INFO L85 PathProgramCache]: Analyzing trace with hash 774508251, now seen corresponding path program 1 times [2024-11-09 05:49:27,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:49:27,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773741326] [2024-11-09 05:49:27,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:49:27,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:49:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:49:30,379 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 40 proven. 217 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:49:30,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:49:30,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773741326] [2024-11-09 05:49:30,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773741326] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:49:30,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499902298] [2024-11-09 05:49:30,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:49:30,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:49:30,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:49:30,381 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:49:30,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_158f1973-2960-4741-a14e-975ffc62d4b3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-09 05:49:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:49:30,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 05:49:30,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:49:31,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 05:49:31,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 05:49:31,152 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:49:31,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2024-11-09 05:49:31,167 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:49:31,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2024-11-09 05:49:31,262 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-11-09 05:49:31,263 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:49:31,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2024-11-09 05:49:31,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 05:49:31,740 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-11-09 05:49:31,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499902298] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:49:31,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1593035348] [2024-11-09 05:49:31,741 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2024-11-09 05:49:31,741 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:49:31,741 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:49:31,742 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:49:31,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs