./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/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_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/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_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/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 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:28:22,536 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:28:22,662 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-09 05:28:22,669 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:28:22,671 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:28:22,731 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:28:22,734 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:28:22,735 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:28:22,735 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:28:22,736 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:28:22,736 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:28:22,737 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:28:22,739 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:28:22,742 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:28:22,742 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:28:22,743 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:28:22,743 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:28:22,744 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:28:22,744 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:28:22,744 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:28:22,745 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:28:22,750 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:28:22,750 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 05:28:22,751 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 05:28:22,751 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:28:22,752 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:28:22,752 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:28:22,752 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:28:22,753 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:28:22,753 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 05:28:22,755 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 05:28:22,756 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 05:28:22,756 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:28:22,757 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 05:28:22,758 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:28:22,758 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 05:28:22,758 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:28:22,759 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:28:22,771 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:28:22,771 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:28:22,772 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:28:22,772 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:28:22,772 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:28:22,773 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:28:22,773 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:28:22,774 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:28:22,774 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:28:22,774 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:28:22,775 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:28:22,775 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_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b [2024-11-09 05:28:23,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:28:23,207 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:28:23,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:28:23,212 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:28:23,215 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:28:23,217 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c Unable to find full path for "g++" [2024-11-09 05:28:25,362 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:28:25,604 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:28:25,604 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2024-11-09 05:28:25,613 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/data/fee0246ba/9321898e3f66480896110429e63b3b8e/FLAG4021f0710 [2024-11-09 05:28:25,643 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/data/fee0246ba/9321898e3f66480896110429e63b3b8e [2024-11-09 05:28:25,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:28:25,647 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:28:25,649 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:28:25,649 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:28:25,655 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:28:25,656 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:28:25" (1/1) ... [2024-11-09 05:28:25,657 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f0ff27f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:25, skipping insertion in model container [2024-11-09 05:28:25,658 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:28:25" (1/1) ... [2024-11-09 05:28:25,680 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:28:25,910 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:28:25,923 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:28:25,949 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:28:25,975 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:28:25,976 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:25 WrapperNode [2024-11-09 05:28:25,976 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:28:25,977 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:28:25,978 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:28:25,978 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:28:25,988 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:25" (1/1) ... [2024-11-09 05:28:25,997 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:25" (1/1) ... [2024-11-09 05:28:26,024 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2024-11-09 05:28:26,026 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:28:26,027 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:28:26,028 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:28:26,028 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:28:26,039 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:25" (1/1) ... [2024-11-09 05:28:26,039 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:25" (1/1) ... [2024-11-09 05:28:26,041 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:25" (1/1) ... [2024-11-09 05:28:26,043 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:25" (1/1) ... [2024-11-09 05:28:26,051 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:25" (1/1) ... [2024-11-09 05:28:26,059 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:25" (1/1) ... [2024-11-09 05:28:26,060 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:25" (1/1) ... [2024-11-09 05:28:26,061 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:25" (1/1) ... [2024-11-09 05:28:26,064 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:28:26,065 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:28:26,065 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:28:26,066 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:28:26,067 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:25" (1/1) ... [2024-11-09 05:28:26,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:28:26,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:26,106 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:28:26,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:28:26,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 05:28:26,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:28:26,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:28:26,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 05:28:26,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 05:28:26,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 05:28:26,254 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:28:26,257 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:28:26,604 INFO L? ?]: Removed 30 outVars from TransFormulas that were not future-live. [2024-11-09 05:28:26,605 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:28:26,645 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:28:26,645 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 05:28:26,646 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:28:26 BoogieIcfgContainer [2024-11-09 05:28:26,646 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:28:26,649 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:28:26,649 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:28:26,653 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:28:26,654 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:28:25" (1/3) ... [2024-11-09 05:28:26,655 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2abec99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:28:26, skipping insertion in model container [2024-11-09 05:28:26,655 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:25" (2/3) ... [2024-11-09 05:28:26,656 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2abec99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:28:26, skipping insertion in model container [2024-11-09 05:28:26,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:28:26" (3/3) ... [2024-11-09 05:28:26,658 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-read.c [2024-11-09 05:28:26,674 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:28:26,674 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2024-11-09 05:28:26,728 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:28:26,737 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;@1ae2d4e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:28:26,737 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-09 05:28:26,742 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.9375) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:26,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 05:28:26,751 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:26,752 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 05:28:26,752 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:28:26,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:26,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1367093753, now seen corresponding path program 1 times [2024-11-09 05:28:26,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:26,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341750228] [2024-11-09 05:28:26,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:26,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:26,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:27,063 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 05:28:27,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:27,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341750228] [2024-11-09 05:28:27,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341750228] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:27,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:28:27,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:28:27,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820213717] [2024-11-09 05:28:27,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:27,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:28:27,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:27,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:28:27,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:28:27,120 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.9375) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 05:28:27,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:27,240 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2024-11-09 05:28:27,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:28:27,244 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 05:28:27,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:27,253 INFO L225 Difference]: With dead ends: 42 [2024-11-09 05:28:27,253 INFO L226 Difference]: Without dead ends: 41 [2024-11-09 05:28:27,256 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 05:28:27,261 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:27,262 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 29 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:28:27,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-09 05:28:27,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2024-11-09 05:28:27,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.7) internal successors, (34), 27 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 05:28:27,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2024-11-09 05:28:27,303 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 6 [2024-11-09 05:28:27,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:27,304 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2024-11-09 05:28:27,304 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 05:28:27,305 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2024-11-09 05:28:27,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 05:28:27,306 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:27,306 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 05:28:27,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:28:27,307 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:28:27,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:27,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1397525044, now seen corresponding path program 1 times [2024-11-09 05:28:27,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:27,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795569607] [2024-11-09 05:28:27,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:27,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:27,526 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 05:28:27,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:27,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795569607] [2024-11-09 05:28:27,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795569607] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:27,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:28:27,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:28:27,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958198932] [2024-11-09 05:28:27,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:27,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:28:27,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:27,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:28:27,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:28:27,532 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 1.5) 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 05:28:27,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:27,683 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2024-11-09 05:28:27,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:28:27,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) 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 05:28:27,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:27,686 INFO L225 Difference]: With dead ends: 46 [2024-11-09 05:28:27,686 INFO L226 Difference]: Without dead ends: 46 [2024-11-09 05:28:27,687 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:28:27,692 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:27,693 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 35 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:28:27,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-09 05:28:27,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2024-11-09 05:28:27,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.608695652173913) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:27,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2024-11-09 05:28:27,703 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 6 [2024-11-09 05:28:27,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:27,705 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2024-11-09 05:28:27,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) 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 05:28:27,705 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2024-11-09 05:28:27,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 05:28:27,706 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:27,706 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:28:27,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 05:28:27,707 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:28:27,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:27,708 INFO L85 PathProgramCache]: Analyzing trace with hash -374041007, now seen corresponding path program 1 times [2024-11-09 05:28:27,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:27,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787697357] [2024-11-09 05:28:27,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:27,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:27,928 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 05:28:27,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:27,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787697357] [2024-11-09 05:28:27,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787697357] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:27,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:28:27,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:28:27,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550372688] [2024-11-09 05:28:27,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:27,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:28:27,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:27,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:28:27,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:28:27,933 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:28,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:28,000 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2024-11-09 05:28:28,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:28:28,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 05:28:28,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:28,002 INFO L225 Difference]: With dead ends: 30 [2024-11-09 05:28:28,002 INFO L226 Difference]: Without dead ends: 30 [2024-11-09 05:28:28,003 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:28:28,005 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:28,006 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 29 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:28:28,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-09 05:28:28,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-09 05:28:28,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.565217391304348) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:28,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2024-11-09 05:28:28,011 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 7 [2024-11-09 05:28:28,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:28,012 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2024-11-09 05:28:28,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:28,012 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2024-11-09 05:28:28,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 05:28:28,013 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:28,013 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:28:28,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 05:28:28,014 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:28:28,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:28,015 INFO L85 PathProgramCache]: Analyzing trace with hash -374041006, now seen corresponding path program 1 times [2024-11-09 05:28:28,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:28,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030657957] [2024-11-09 05:28:28,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:28,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:28,346 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 05:28:28,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:28,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030657957] [2024-11-09 05:28:28,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030657957] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:28,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:28:28,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:28:28,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098368865] [2024-11-09 05:28:28,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:28,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:28:28,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:28,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:28:28,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:28:28,351 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:28,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:28,488 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2024-11-09 05:28:28,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:28:28,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 05:28:28,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:28,490 INFO L225 Difference]: With dead ends: 35 [2024-11-09 05:28:28,490 INFO L226 Difference]: Without dead ends: 35 [2024-11-09 05:28:28,491 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:28:28,496 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:28,496 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 28 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:28:28,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-09 05:28:28,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2024-11-09 05:28:28,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:28,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2024-11-09 05:28:28,509 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 7 [2024-11-09 05:28:28,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:28,510 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2024-11-09 05:28:28,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:28,511 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2024-11-09 05:28:28,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-09 05:28:28,511 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:28,512 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:28:28,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 05:28:28,514 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:28:28,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:28,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1908984780, now seen corresponding path program 1 times [2024-11-09 05:28:28,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:28,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641179498] [2024-11-09 05:28:28,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:28,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:28:28,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:28,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641179498] [2024-11-09 05:28:28,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641179498] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:28,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278352268] [2024-11-09 05:28:28,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:28,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:28,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:28,719 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:28,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:28:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:28,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 05:28:28,824 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:28,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:28:28,981 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:28:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:28:29,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278352268] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:28:29,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [19407539] [2024-11-09 05:28:29,077 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:28:29,078 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:28:29,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:28:29,090 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:28:29,091 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:28:30,365 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:28:32,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [19407539] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:32,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:28:32,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4, 4] total 12 [2024-11-09 05:28:32,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183094313] [2024-11-09 05:28:32,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:32,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:28:32,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:32,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:28:32,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:28:32,355 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 05:28:32,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:32,779 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2024-11-09 05:28:32,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:28:32,780 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-09 05:28:32,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:32,783 INFO L225 Difference]: With dead ends: 41 [2024-11-09 05:28:32,785 INFO L226 Difference]: Without dead ends: 41 [2024-11-09 05:28:32,786 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:28:32,787 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:32,788 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:28:32,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-09 05:28:32,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2024-11-09 05:28:32,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 37 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:32,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2024-11-09 05:28:32,801 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 10 [2024-11-09 05:28:32,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:32,802 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2024-11-09 05:28:32,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 05:28:32,803 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2024-11-09 05:28:32,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 05:28:32,803 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:32,804 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:28:32,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:28:33,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:33,005 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:28:33,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:33,006 INFO L85 PathProgramCache]: Analyzing trace with hash 248070485, now seen corresponding path program 1 times [2024-11-09 05:28:33,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:33,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337993958] [2024-11-09 05:28:33,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:33,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:28:33,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:33,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337993958] [2024-11-09 05:28:33,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337993958] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:33,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:28:33,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:28:33,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412667699] [2024-11-09 05:28:33,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:33,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:28:33,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:33,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:28:33,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:28:33,068 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 3 states, 2 states have (on average 7.5) 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 05:28:33,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:33,103 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2024-11-09 05:28:33,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:28:33,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) 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 05:28:33,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:33,105 INFO L225 Difference]: With dead ends: 36 [2024-11-09 05:28:33,105 INFO L226 Difference]: Without dead ends: 36 [2024-11-09 05:28:33,105 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 05:28:33,106 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:33,107 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 18 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:28:33,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-09 05:28:33,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-09 05:28:33,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 35 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:33,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-11-09 05:28:33,117 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 15 [2024-11-09 05:28:33,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:33,117 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-11-09 05:28:33,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) 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 05:28:33,117 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-11-09 05:28:33,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 05:28:33,118 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:33,118 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:28:33,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 05:28:33,119 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:28:33,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:33,120 INFO L85 PathProgramCache]: Analyzing trace with hash 248070486, now seen corresponding path program 1 times [2024-11-09 05:28:33,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:33,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370893795] [2024-11-09 05:28:33,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:33,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:28:33,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:33,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370893795] [2024-11-09 05:28:33,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370893795] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:33,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080114555] [2024-11-09 05:28:33,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:33,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:33,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:33,249 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:33,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:28:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:33,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 05:28:33,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:33,362 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 05:28:33,362 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:28:33,411 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 05:28:33,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080114555] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:28:33,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1366033206] [2024-11-09 05:28:33,414 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 05:28:33,414 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:28:33,414 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:28:33,415 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:28:33,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:28:35,833 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:28:36,040 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '545#true' at error location [2024-11-09 05:28:36,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:28:36,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:28:36,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 9 [2024-11-09 05:28:36,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208726507] [2024-11-09 05:28:36,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:28:36,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 05:28:36,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:36,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 05:28:36,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-09 05:28:36,044 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:36,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:36,357 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2024-11-09 05:28:36,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 05:28:36,358 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-09 05:28:36,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:36,359 INFO L225 Difference]: With dead ends: 49 [2024-11-09 05:28:36,359 INFO L226 Difference]: Without dead ends: 49 [2024-11-09 05:28:36,359 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2024-11-09 05:28:36,360 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 97 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:36,361 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 14 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:28:36,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-09 05:28:36,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2024-11-09 05:28:36,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:36,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2024-11-09 05:28:36,366 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 15 [2024-11-09 05:28:36,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:36,366 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2024-11-09 05:28:36,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:36,367 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2024-11-09 05:28:36,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 05:28:36,368 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:36,368 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:28:36,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:28:36,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 05:28:36,569 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:28:36,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:36,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1727859351, now seen corresponding path program 1 times [2024-11-09 05:28:36,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:36,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284035984] [2024-11-09 05:28:36,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:36,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:36,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:28:36,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:36,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284035984] [2024-11-09 05:28:36,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284035984] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:36,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862833083] [2024-11-09 05:28:36,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:36,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:36,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:36,688 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:36,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:28:36,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:36,779 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 05:28:36,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:37,100 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#mask~0#1.base_17| Int) (|v_ULTIMATE.start_main_~#b~0#1.base_26| Int)) (and (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_26| 1) |v_ULTIMATE.start_main_~#mask~0#1.base_17|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_26|) 0) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_26| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_17| 0)))) is different from true [2024-11-09 05:28:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 05:28:37,101 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:28:37,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862833083] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:37,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:28:37,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2024-11-09 05:28:37,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328824107] [2024-11-09 05:28:37,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:37,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:28:37,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:37,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:28:37,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2024-11-09 05:28:37,110 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states 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 05:28:37,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:37,148 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2024-11-09 05:28:37,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:28:37,149 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 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 05:28:37,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:37,150 INFO L225 Difference]: With dead ends: 43 [2024-11-09 05:28:37,150 INFO L226 Difference]: Without dead ends: 42 [2024-11-09 05:28:37,150 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2024-11-09 05:28:37,151 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:37,152 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 16 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2024-11-09 05:28:37,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-09 05:28:37,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-09 05:28:37,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:37,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2024-11-09 05:28:37,164 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 21 [2024-11-09 05:28:37,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:37,164 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2024-11-09 05:28:37,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states 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 05:28:37,165 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2024-11-09 05:28:37,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-09 05:28:37,165 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:37,166 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:28:37,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 05:28:37,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-09 05:28:37,371 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:28:37,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:37,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1679220512, now seen corresponding path program 1 times [2024-11-09 05:28:37,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:37,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684332589] [2024-11-09 05:28:37,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:37,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:28:37,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:37,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684332589] [2024-11-09 05:28:37,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684332589] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:37,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124875280] [2024-11-09 05:28:37,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:37,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:37,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:37,498 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:37,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:28:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:37,585 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 05:28:37,587 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:37,763 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 15 treesize of output 1 [2024-11-09 05:28:37,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:28:37,855 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:28:37,855 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:28:37,928 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 14 treesize of output 12 [2024-11-09 05:28:37,934 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 05:28:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:28:38,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124875280] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:28:38,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [545536000] [2024-11-09 05:28:38,098 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-09 05:28:38,099 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:28:38,099 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:28:38,099 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:28:38,100 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:28:40,440 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:28:40,664 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '902#true' at error location [2024-11-09 05:28:40,664 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:28:40,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:28:40,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 9, 9] total 18 [2024-11-09 05:28:40,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366179920] [2024-11-09 05:28:40,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:28:40,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 05:28:40,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:40,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 05:28:40,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2024-11-09 05:28:40,666 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:40,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:40,891 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2024-11-09 05:28:40,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 05:28:40,893 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-09 05:28:40,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:40,894 INFO L225 Difference]: With dead ends: 65 [2024-11-09 05:28:40,894 INFO L226 Difference]: Without dead ends: 65 [2024-11-09 05:28:40,894 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2024-11-09 05:28:40,895 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:40,895 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 59 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:28:40,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-09 05:28:40,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 47. [2024-11-09 05:28:40,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 46 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 05:28:40,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2024-11-09 05:28:40,901 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 23 [2024-11-09 05:28:40,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:40,901 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2024-11-09 05:28:40,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:40,902 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2024-11-09 05:28:40,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-09 05:28:40,903 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:40,903 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2024-11-09 05:28:40,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 05:28:41,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:41,104 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:28:41,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:41,105 INFO L85 PathProgramCache]: Analyzing trace with hash -437189644, now seen corresponding path program 1 times [2024-11-09 05:28:41,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:41,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746415878] [2024-11-09 05:28:41,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:41,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 05:28:41,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:41,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746415878] [2024-11-09 05:28:41,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746415878] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:41,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647327657] [2024-11-09 05:28:41,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:41,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:41,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:41,180 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:41,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:28:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:41,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 05:28:41,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:41,296 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:28:41,296 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:28:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 05:28:41,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647327657] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:28:41,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1195090999] [2024-11-09 05:28:41,344 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:28:41,344 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:28:41,345 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:28:41,345 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:28:41,345 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:28:42,665 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:28:43,165 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1317#(exists ((|v_ULTIMATE.start_foo_~i~0#1_94| Int)) (and (<= 33 (mod |v_ULTIMATE.start_foo_~i~0#1_94| 4294967296)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_94|) (<= |v_ULTIMATE.start_foo_~i~0#1_94| (+ |ULTIMATE.start_foo_~size#1| 1))))' at error location [2024-11-09 05:28:43,166 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:28:43,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:28:43,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 3] total 8 [2024-11-09 05:28:43,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667597026] [2024-11-09 05:28:43,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:28:43,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 05:28:43,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:43,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 05:28:43,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2024-11-09 05:28:43,168 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 9 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:43,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:43,579 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2024-11-09 05:28:43,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 05:28:43,579 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-09 05:28:43,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:43,580 INFO L225 Difference]: With dead ends: 98 [2024-11-09 05:28:43,581 INFO L226 Difference]: Without dead ends: 98 [2024-11-09 05:28:43,581 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2024-11-09 05:28:43,582 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 55 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:43,582 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 28 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:28:43,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-09 05:28:43,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 57. [2024-11-09 05:28:43,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 56 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 05:28:43,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2024-11-09 05:28:43,588 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 23 [2024-11-09 05:28:43,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:43,589 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2024-11-09 05:28:43,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:43,589 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2024-11-09 05:28:43,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-09 05:28:43,590 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:43,590 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1] [2024-11-09 05:28:43,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 05:28:43,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 05:28:43,791 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:28:43,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:43,792 INFO L85 PathProgramCache]: Analyzing trace with hash -667977020, now seen corresponding path program 1 times [2024-11-09 05:28:43,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:43,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144849088] [2024-11-09 05:28:43,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:43,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:43,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:43,994 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 05:28:43,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:43,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144849088] [2024-11-09 05:28:43,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144849088] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:43,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987852873] [2024-11-09 05:28:43,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:43,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:43,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:43,998 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:44,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:28:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:44,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 05:28:44,101 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:44,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-09 05:28:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 05:28:44,324 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:28:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 05:28:44,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987852873] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:28:44,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1548479912] [2024-11-09 05:28:44,525 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:28:44,526 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:28:44,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:28:44,527 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:28:44,527 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:28:45,965 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:28:46,383 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1646#(exists ((|v_ULTIMATE.start_foo_~b#1.base_26| Int) (|v_ULTIMATE.start_foo_~i~0#1_116| Int) (|v_ULTIMATE.start_foo_~b#1.offset_25| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~i~0#1_116|) (<= |v_ULTIMATE.start_foo_~i~0#1_116| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= (mod |v_ULTIMATE.start_foo_~i~0#1_116| 4294967296) 32) (or (< (+ |v_ULTIMATE.start_foo_~b#1.offset_25| |v_ULTIMATE.start_foo_~i~0#1_116|) 0) (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_26|) (+ |v_ULTIMATE.start_foo_~b#1.offset_25| |v_ULTIMATE.start_foo_~i~0#1_116| 1)))))' at error location [2024-11-09 05:28:46,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:28:46,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:28:46,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 05:28:46,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864174337] [2024-11-09 05:28:46,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:28:46,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 05:28:46,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:46,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 05:28:46,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-09 05:28:46,387 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 11 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:46,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:46,597 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2024-11-09 05:28:46,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:28:46,598 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-09 05:28:46,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:46,601 INFO L225 Difference]: With dead ends: 73 [2024-11-09 05:28:46,601 INFO L226 Difference]: Without dead ends: 73 [2024-11-09 05:28:46,602 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2024-11-09 05:28:46,603 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:46,603 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 42 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:28:46,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-09 05:28:46,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 58. [2024-11-09 05:28:46,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 57 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 05:28:46,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2024-11-09 05:28:46,615 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 24 [2024-11-09 05:28:46,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:46,616 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2024-11-09 05:28:46,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:46,616 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2024-11-09 05:28:46,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 05:28:46,617 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:46,617 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1] [2024-11-09 05:28:46,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 05:28:46,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:46,818 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:28:46,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:46,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1118461309, now seen corresponding path program 1 times [2024-11-09 05:28:46,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:46,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678777826] [2024-11-09 05:28:46,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:46,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:28:46,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:46,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678777826] [2024-11-09 05:28:46,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678777826] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:46,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947871633] [2024-11-09 05:28:46,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:46,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:46,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:46,985 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:46,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:28:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:47,069 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:28:47,071 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:28:47,187 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:28:47,292 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:28:47,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947871633] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:28:47,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1197520769] [2024-11-09 05:28:47,295 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:28:47,295 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:28:47,296 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:28:47,296 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:28:47,296 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:28:48,105 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:28:48,780 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1962#(and (<= 2 |ULTIMATE.start_main_#t~ret2#1|) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_#t~ret2#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#mask~0#1.base|))' at error location [2024-11-09 05:28:48,780 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:28:48,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:28:48,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-09 05:28:48,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773990569] [2024-11-09 05:28:48,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:28:48,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 05:28:48,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:48,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 05:28:48,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2024-11-09 05:28:48,785 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:49,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:49,078 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2024-11-09 05:28:49,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 05:28:49,081 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-09 05:28:49,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:49,081 INFO L225 Difference]: With dead ends: 61 [2024-11-09 05:28:49,081 INFO L226 Difference]: Without dead ends: 61 [2024-11-09 05:28:49,082 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2024-11-09 05:28:49,083 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 39 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:49,083 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 25 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:28:49,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-09 05:28:49,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2024-11-09 05:28:49,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 57 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 05:28:49,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2024-11-09 05:28:49,093 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 27 [2024-11-09 05:28:49,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:49,094 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2024-11-09 05:28:49,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:49,095 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2024-11-09 05:28:49,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-09 05:28:49,097 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:49,097 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1] [2024-11-09 05:28:49,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 05:28:49,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:49,300 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:28:49,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:49,301 INFO L85 PathProgramCache]: Analyzing trace with hash -202893845, now seen corresponding path program 2 times [2024-11-09 05:28:49,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:49,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871048800] [2024-11-09 05:28:49,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:49,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:49,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:49,564 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 05:28:49,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:49,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871048800] [2024-11-09 05:28:49,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871048800] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:49,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901588615] [2024-11-09 05:28:49,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:28:49,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:49,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:49,567 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:49,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 05:28:49,670 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 05:28:49,670 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:28:49,671 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 05:28:49,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:49,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 05:28:49,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-09 05:28:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 05:28:50,040 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:28:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 05:28:50,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901588615] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:28:50,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1536317467] [2024-11-09 05:28:50,281 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:28:50,281 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:28:50,282 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:28:50,282 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:28:50,282 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:28:51,651 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:28:52,052 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2291#(and (<= |ULTIMATE.start_main_#t~ret2#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~ret2#1|))' at error location [2024-11-09 05:28:52,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:28:52,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:28:52,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 8 [2024-11-09 05:28:52,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586472756] [2024-11-09 05:28:52,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:28:52,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 05:28:52,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:52,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 05:28:52,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-11-09 05:28:52,055 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 10 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:52,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:52,199 INFO L93 Difference]: Finished difference Result 134 states and 150 transitions. [2024-11-09 05:28:52,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:28:52,199 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-11-09 05:28:52,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:52,200 INFO L225 Difference]: With dead ends: 134 [2024-11-09 05:28:52,200 INFO L226 Difference]: Without dead ends: 134 [2024-11-09 05:28:52,201 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2024-11-09 05:28:52,202 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:52,202 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 47 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:28:52,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-09 05:28:52,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2024-11-09 05:28:52,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.2195121951219512) internal successors, (150), 127 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 05:28:52,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 150 transitions. [2024-11-09 05:28:52,210 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 150 transitions. Word has length 31 [2024-11-09 05:28:52,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:52,210 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 150 transitions. [2024-11-09 05:28:52,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:52,211 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 150 transitions. [2024-11-09 05:28:52,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 05:28:52,212 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:52,212 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 2, 2, 1, 1, 1, 1, 1] [2024-11-09 05:28:52,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 05:28:52,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:52,417 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:28:52,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:52,417 INFO L85 PathProgramCache]: Analyzing trace with hash -339583444, now seen corresponding path program 2 times [2024-11-09 05:28:52,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:52,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318044147] [2024-11-09 05:28:52,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:52,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 27 proven. 54 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:28:52,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:52,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318044147] [2024-11-09 05:28:52,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318044147] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:52,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614237481] [2024-11-09 05:28:52,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:28:52,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:52,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:52,613 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:52,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 05:28:52,730 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 05:28:52,730 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:28:52,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 05:28:52,738 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:52,954 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 05:28:52,954 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:28:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 05:28:53,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614237481] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:28:53,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1422730301] [2024-11-09 05:28:53,459 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:28:53,459 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:28:53,459 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:28:53,460 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:28:53,460 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:28:54,642 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:28:55,616 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2784#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 2 |ULTIMATE.start_foo_~b#1.base|) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (exists ((|v_ULTIMATE.start_foo_~i~0#1_189| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~i~0#1_189|) (<= 33 (mod |v_ULTIMATE.start_foo_~i~0#1_189| 4294967296)) (<= |v_ULTIMATE.start_foo_~i~0#1_189| (+ |ULTIMATE.start_foo_~size#1| 1)))) (<= 2 |ULTIMATE.start_main_~#mask~0#1.base|) (= |ULTIMATE.start_foo_~b#1.offset| 0))' at error location [2024-11-09 05:28:55,616 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:28:55,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:28:55,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2024-11-09 05:28:55,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134068734] [2024-11-09 05:28:55,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:28:55,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 05:28:55,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:55,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 05:28:55,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2024-11-09 05:28:55,619 INFO L87 Difference]: Start difference. First operand 128 states and 150 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:56,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:56,569 INFO L93 Difference]: Finished difference Result 125 states and 139 transitions. [2024-11-09 05:28:56,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 05:28:56,570 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-09 05:28:56,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:56,571 INFO L225 Difference]: With dead ends: 125 [2024-11-09 05:28:56,571 INFO L226 Difference]: Without dead ends: 125 [2024-11-09 05:28:56,572 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=274, Invalid=1366, Unknown=0, NotChecked=0, Total=1640 [2024-11-09 05:28:56,573 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 46 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:56,574 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 62 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:28:56,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-09 05:28:56,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2024-11-09 05:28:56,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.1724137931034482) internal successors, (136), 120 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:56,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 136 transitions. [2024-11-09 05:28:56,581 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 136 transitions. Word has length 35 [2024-11-09 05:28:56,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:56,581 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 136 transitions. [2024-11-09 05:28:56,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:28:56,582 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 136 transitions. [2024-11-09 05:28:56,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-09 05:28:56,583 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:56,583 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 05:28:56,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 05:28:56,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 05:28:56,788 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:28:56,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:56,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1408147346, now seen corresponding path program 2 times [2024-11-09 05:28:56,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:56,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098625160] [2024-11-09 05:28:56,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:56,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:56,959 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:28:56,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:56,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098625160] [2024-11-09 05:28:56,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098625160] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:56,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20451109] [2024-11-09 05:28:56,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:28:56,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:56,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:56,963 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:56,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 05:28:57,056 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 05:28:57,056 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:28:57,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 05:28:57,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:57,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-09 05:28:57,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:28:57,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 05:28:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-09 05:28:57,324 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:28:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-09 05:28:57,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20451109] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:28:57,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1664760951] [2024-11-09 05:28:57,582 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-09 05:28:57,582 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:28:57,582 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:28:57,583 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:28:57,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:28:59,390 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:28:59,614 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3066#true' at error location [2024-11-09 05:28:59,614 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:28:59,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:28:59,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-09 05:28:59,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224295600] [2024-11-09 05:28:59,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:28:59,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 05:28:59,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:59,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 05:28:59,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2024-11-09 05:28:59,617 INFO L87 Difference]: Start difference. First operand 121 states and 136 transitions. Second operand has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 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 05:28:59,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:59,855 INFO L93 Difference]: Finished difference Result 162 states and 181 transitions. [2024-11-09 05:28:59,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 05:28:59,855 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 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) Word has length 40 [2024-11-09 05:28:59,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:59,857 INFO L225 Difference]: With dead ends: 162 [2024-11-09 05:28:59,857 INFO L226 Difference]: Without dead ends: 162 [2024-11-09 05:28:59,857 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2024-11-09 05:28:59,858 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 161 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:59,859 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 42 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:28:59,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-11-09 05:28:59,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 158. [2024-11-09 05:28:59,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.1830065359477124) internal successors, (181), 157 states have internal predecessors, (181), 0 states have call successors, (0), 0 states 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 05:28:59,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 181 transitions. [2024-11-09 05:28:59,866 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 181 transitions. Word has length 40 [2024-11-09 05:28:59,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:59,867 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 181 transitions. [2024-11-09 05:28:59,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 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 05:28:59,868 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 181 transitions. [2024-11-09 05:28:59,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-09 05:28:59,869 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:59,869 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 3, 3, 2, 2, 2, 1, 1] [2024-11-09 05:28:59,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 05:29:00,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 05:29:00,070 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:29:00,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:29:00,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1041068122, now seen corresponding path program 2 times [2024-11-09 05:29:00,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:29:00,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136558158] [2024-11-09 05:29:00,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:00,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:29:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 42 proven. 146 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 05:29:00,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:29:00,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136558158] [2024-11-09 05:29:00,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136558158] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:29:00,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146119740] [2024-11-09 05:29:00,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:29:00,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:00,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:29:00,372 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:29:00,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 05:29:00,481 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 05:29:00,481 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:29:00,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 05:29:00,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:29:00,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-09 05:29:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 4 proven. 160 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 05:29:00,949 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:29:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 05:29:01,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146119740] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:29:01,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [892019022] [2024-11-09 05:29:01,407 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:29:01,407 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:29:01,408 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:29:01,408 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:29:01,408 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:29:02,110 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:29:02,643 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3980#(exists ((|v_ULTIMATE.start_foo_~b#1.base_59| Int) (|v_ULTIMATE.start_foo_~b#1.offset_58| Int) (|v_ULTIMATE.start_foo_~i~0#1_245| Int)) (and (or (< (+ |v_ULTIMATE.start_foo_~b#1.offset_58| |v_ULTIMATE.start_foo_~i~0#1_245|) 0) (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_59|) (+ |v_ULTIMATE.start_foo_~b#1.offset_58| |v_ULTIMATE.start_foo_~i~0#1_245| 1))) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_245|) (<= (mod |v_ULTIMATE.start_foo_~i~0#1_245| 4294967296) 32) (<= |v_ULTIMATE.start_foo_~i~0#1_245| (+ |ULTIMATE.start_foo_~size#1| 1))))' at error location [2024-11-09 05:29:02,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:29:02,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:29:02,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 21 [2024-11-09 05:29:02,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987889377] [2024-11-09 05:29:02,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:29:02,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 05:29:02,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:29:02,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 05:29:02,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2024-11-09 05:29:02,654 INFO L87 Difference]: Start difference. First operand 158 states and 181 transitions. Second operand has 22 states, 22 states have (on average 4.590909090909091) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:29:04,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:29:04,170 INFO L93 Difference]: Finished difference Result 181 states and 204 transitions. [2024-11-09 05:29:04,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-09 05:29:04,172 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.590909090909091) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2024-11-09 05:29:04,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:29:04,173 INFO L225 Difference]: With dead ends: 181 [2024-11-09 05:29:04,173 INFO L226 Difference]: Without dead ends: 181 [2024-11-09 05:29:04,175 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=666, Invalid=2526, Unknown=0, NotChecked=0, Total=3192 [2024-11-09 05:29:04,176 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:29:04,176 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 64 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:29:04,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-09 05:29:04,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 168. [2024-11-09 05:29:04,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.1717791411042944) internal successors, (191), 167 states have internal predecessors, (191), 0 states have call successors, (0), 0 states 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 05:29:04,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 191 transitions. [2024-11-09 05:29:04,184 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 191 transitions. Word has length 53 [2024-11-09 05:29:04,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:29:04,184 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 191 transitions. [2024-11-09 05:29:04,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.590909090909091) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:29:04,185 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 191 transitions. [2024-11-09 05:29:04,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-09 05:29:04,187 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:29:04,187 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2024-11-09 05:29:04,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 05:29:04,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 05:29:04,392 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:29:04,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:29:04,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1568056916, now seen corresponding path program 1 times [2024-11-09 05:29:04,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:29:04,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558649821] [2024-11-09 05:29:04,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:04,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:29:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 45 proven. 88 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 05:29:04,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:29:04,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558649821] [2024-11-09 05:29:04,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558649821] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:29:04,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235600944] [2024-11-09 05:29:04,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:04,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:04,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:29:04,646 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:29:04,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 05:29:04,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:04,780 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 05:29:04,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:29:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 45 proven. 88 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 05:29:04,926 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:29:05,058 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 45 proven. 88 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 05:29:05,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235600944] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:29:05,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1808948108] [2024-11-09 05:29:05,060 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 05:29:05,061 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:29:05,061 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:29:05,064 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:29:05,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:29:06,521 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:29:06,834 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4790#(and (exists ((|v_ULTIMATE.start_main_old_#valid#1_10| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_10| |#valid|))) (exists ((|v_ULTIMATE.start_main_~#mask~0#1.base_18| Int) (|v_#valid_49| (Array Int Int)) (|v_ULTIMATE.start_main_~#b~0#1.base_31| Int)) (= (store (store |v_#valid_49| |v_ULTIMATE.start_main_~#b~0#1.base_31| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_18| 0) |#valid|)) (exists ((|v_ULTIMATE.start_main_~i~1#1_117| Int)) (and (<= 32 (mod |v_ULTIMATE.start_main_~i~1#1_117| 4294967296)) (<= 0 |v_ULTIMATE.start_main_~i~1#1_117|))) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-09 05:29:06,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:29:06,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:29:06,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-11-09 05:29:06,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452492396] [2024-11-09 05:29:06,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:29:06,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 05:29:06,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:29:06,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 05:29:06,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=458, Unknown=1, NotChecked=0, Total=552 [2024-11-09 05:29:06,838 INFO L87 Difference]: Start difference. First operand 168 states and 191 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 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 05:29:07,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:29:07,334 INFO L93 Difference]: Finished difference Result 177 states and 196 transitions. [2024-11-09 05:29:07,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 05:29:07,335 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 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) Word has length 65 [2024-11-09 05:29:07,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:29:07,336 INFO L225 Difference]: With dead ends: 177 [2024-11-09 05:29:07,336 INFO L226 Difference]: Without dead ends: 177 [2024-11-09 05:29:07,337 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 172 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=913, Unknown=1, NotChecked=0, Total=1122 [2024-11-09 05:29:07,338 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 44 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:29:07,338 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 31 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:29:07,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-11-09 05:29:07,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 172. [2024-11-09 05:29:07,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.1437125748502994) internal successors, (191), 171 states have internal predecessors, (191), 0 states have call successors, (0), 0 states 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 05:29:07,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 191 transitions. [2024-11-09 05:29:07,345 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 191 transitions. Word has length 65 [2024-11-09 05:29:07,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:29:07,345 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 191 transitions. [2024-11-09 05:29:07,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 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 05:29:07,346 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 191 transitions. [2024-11-09 05:29:07,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-09 05:29:07,347 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:29:07,347 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2024-11-09 05:29:07,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 05:29:07,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 05:29:07,548 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:29:07,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:29:07,549 INFO L85 PathProgramCache]: Analyzing trace with hash -548713236, now seen corresponding path program 2 times [2024-11-09 05:29:07,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:29:07,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900207396] [2024-11-09 05:29:07,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:07,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:29:07,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:07,814 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-09 05:29:07,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:29:07,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900207396] [2024-11-09 05:29:07,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900207396] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:29:07,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429483603] [2024-11-09 05:29:07,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:29:07,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:07,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:29:07,818 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:29:07,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 05:29:07,924 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-09 05:29:07,924 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:29:07,925 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 05:29:07,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:29:08,496 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#mask~0#1.base_19| Int) (v_DerPreprocessor_3 Int) (v_DerPreprocessor_2 Int) (|v_ULTIMATE.start_main_~#b~0#1.base_32| Int)) (and (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_32| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_19| 0)) (= (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_32| v_DerPreprocessor_2) |v_ULTIMATE.start_main_~#mask~0#1.base_19| v_DerPreprocessor_3) |v_ULTIMATE.start_main_~#b~0#1.base_32|) v_DerPreprocessor_2) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#mask~0#1.base_19|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_32|) 0))) is different from true [2024-11-09 05:29:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2024-11-09 05:29:08,497 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:29:08,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429483603] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:29:08,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:29:08,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2024-11-09 05:29:08,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860514228] [2024-11-09 05:29:08,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:29:08,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:29:08,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:29:08,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:29:08,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=39, Unknown=1, NotChecked=12, Total=72 [2024-11-09 05:29:08,499 INFO L87 Difference]: Start difference. First operand 172 states and 191 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:29:08,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:29:08,530 INFO L93 Difference]: Finished difference Result 171 states and 190 transitions. [2024-11-09 05:29:08,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:29:08,531 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2024-11-09 05:29:08,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:29:08,532 INFO L225 Difference]: With dead ends: 171 [2024-11-09 05:29:08,532 INFO L226 Difference]: Without dead ends: 169 [2024-11-09 05:29:08,532 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=39, Unknown=1, NotChecked=12, Total=72 [2024-11-09 05:29:08,533 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:29:08,533 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 15 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 23 Unchecked, 0.0s Time] [2024-11-09 05:29:08,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-09 05:29:08,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2024-11-09 05:29:08,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 165 states have (on average 1.1090909090909091) internal successors, (183), 168 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:29:08,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 183 transitions. [2024-11-09 05:29:08,539 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 183 transitions. Word has length 69 [2024-11-09 05:29:08,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:29:08,540 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 183 transitions. [2024-11-09 05:29:08,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:29:08,540 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 183 transitions. [2024-11-09 05:29:08,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-09 05:29:08,541 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:29:08,542 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 6, 6, 5, 5, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2024-11-09 05:29:08,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 05:29:08,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 05:29:08,746 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:29:08,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:29:08,746 INFO L85 PathProgramCache]: Analyzing trace with hash -737140032, now seen corresponding path program 3 times [2024-11-09 05:29:08,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:29:08,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503664270] [2024-11-09 05:29:08,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:08,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:29:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:08,962 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2024-11-09 05:29:08,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:29:08,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503664270] [2024-11-09 05:29:08,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503664270] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:29:08,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093053832] [2024-11-09 05:29:08,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:29:08,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:08,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:29:08,966 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:29:08,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 05:29:09,127 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:29:09,128 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:29:09,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 05:29:09,133 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:29:09,348 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 19 treesize of output 1 [2024-11-09 05:29:09,482 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 19 treesize of output 7 [2024-11-09 05:29:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 61 proven. 152 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-09 05:29:09,504 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:29:09,648 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 16 treesize of output 14 [2024-11-09 05:29:09,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-09 05:29:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 61 proven. 152 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-09 05:29:09,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093053832] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:29:09,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1508586470] [2024-11-09 05:29:09,817 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-09 05:29:09,819 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:29:09,819 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:29:09,820 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:29:09,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:29:11,398 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:29:11,752 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5723#true' at error location [2024-11-09 05:29:11,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:29:11,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:29:11,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 15, 15] total 20 [2024-11-09 05:29:11,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118261415] [2024-11-09 05:29:11,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:29:11,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 05:29:11,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:29:11,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 05:29:11,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2024-11-09 05:29:11,757 INFO L87 Difference]: Start difference. First operand 169 states and 183 transitions. Second operand has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 05:29:12,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:29:12,307 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2024-11-09 05:29:12,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 05:29:12,308 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 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 77 [2024-11-09 05:29:12,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:29:12,309 INFO L225 Difference]: With dead ends: 169 [2024-11-09 05:29:12,309 INFO L226 Difference]: Without dead ends: 169 [2024-11-09 05:29:12,310 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 203 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2024-11-09 05:29:12,311 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 31 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:29:12,311 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 172 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:29:12,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-09 05:29:12,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2024-11-09 05:29:12,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 165 states have (on average 1.096969696969697) internal successors, (181), 168 states have internal predecessors, (181), 0 states have call successors, (0), 0 states 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 05:29:12,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 181 transitions. [2024-11-09 05:29:12,316 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 181 transitions. Word has length 77 [2024-11-09 05:29:12,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:29:12,316 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 181 transitions. [2024-11-09 05:29:12,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 05:29:12,317 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 181 transitions. [2024-11-09 05:29:12,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-09 05:29:12,318 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:29:12,318 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 5, 5, 4, 4, 4, 1, 1] [2024-11-09 05:29:12,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 05:29:12,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:12,519 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:29:12,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:29:12,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1625145182, now seen corresponding path program 3 times [2024-11-09 05:29:12,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:29:12,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991420581] [2024-11-09 05:29:12,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:12,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:29:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 345 proven. 275 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2024-11-09 05:29:13,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:29:13,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991420581] [2024-11-09 05:29:13,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991420581] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:29:13,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088610783] [2024-11-09 05:29:13,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:29:13,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:13,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:29:13,033 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:29:13,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 05:29:13,254 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:29:13,254 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:29:13,257 INFO L255 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 05:29:13,260 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:29:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 424 proven. 196 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2024-11-09 05:29:13,513 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:29:13,717 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 424 proven. 196 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2024-11-09 05:29:13,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088610783] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:29:13,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1375246228] [2024-11-09 05:29:13,720 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:29:13,721 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:29:13,721 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:29:13,721 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:29:13,722 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:29:14,555 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:29:15,075 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7125#(exists ((|v_ULTIMATE.start_foo_~i~0#1_357| Int)) (and (<= |v_ULTIMATE.start_foo_~i~0#1_357| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_357|) (<= 33 (mod |v_ULTIMATE.start_foo_~i~0#1_357| 4294967296))))' at error location [2024-11-09 05:29:15,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:29:15,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:29:15,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2024-11-09 05:29:15,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111498651] [2024-11-09 05:29:15,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:29:15,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 05:29:15,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:29:15,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 05:29:15,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2024-11-09 05:29:15,078 INFO L87 Difference]: Start difference. First operand 169 states and 181 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 17 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:29:15,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:29:15,590 INFO L93 Difference]: Finished difference Result 190 states and 206 transitions. [2024-11-09 05:29:15,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 05:29:15,591 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 17 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2024-11-09 05:29:15,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:29:15,592 INFO L225 Difference]: With dead ends: 190 [2024-11-09 05:29:15,593 INFO L226 Difference]: Without dead ends: 190 [2024-11-09 05:29:15,593 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 256 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=300, Invalid=1260, Unknown=0, NotChecked=0, Total=1560 [2024-11-09 05:29:15,594 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 55 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:29:15,594 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 15 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:29:15,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-11-09 05:29:15,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 178. [2024-11-09 05:29:15,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 174 states have (on average 1.0919540229885059) internal successors, (190), 177 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 05:29:15,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 190 transitions. [2024-11-09 05:29:15,601 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 190 transitions. Word has length 94 [2024-11-09 05:29:15,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:29:15,601 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 190 transitions. [2024-11-09 05:29:15,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 17 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:29:15,601 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 190 transitions. [2024-11-09 05:29:15,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-09 05:29:15,602 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:29:15,602 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 5, 5, 4, 4, 4, 1, 1] [2024-11-09 05:29:15,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-09 05:29:15,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:15,803 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:29:15,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:29:15,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1276604170, now seen corresponding path program 4 times [2024-11-09 05:29:15,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:29:15,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156076072] [2024-11-09 05:29:15,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:15,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:29:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 286 proven. 36 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2024-11-09 05:29:16,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:29:16,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156076072] [2024-11-09 05:29:16,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156076072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:29:16,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579170297] [2024-11-09 05:29:16,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:29:16,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:16,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:29:16,089 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:29:16,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 05:29:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:16,281 INFO L255 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-09 05:29:16,284 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:29:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-09 05:29:16,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:29:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 286 proven. 36 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2024-11-09 05:29:16,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579170297] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:29:16,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [383480710] [2024-11-09 05:29:16,724 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:29:16,724 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:29:16,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:29:16,725 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:29:16,725 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:29:17,537 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:29:18,037 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8134#(exists ((|v_ULTIMATE.start_foo_~i~0#1_385| Int)) (and (<= |v_ULTIMATE.start_foo_~i~0#1_385| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_385|) (<= 33 (mod |v_ULTIMATE.start_foo_~i~0#1_385| 4294967296))))' at error location [2024-11-09 05:29:18,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:29:18,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:29:18,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 6] total 21 [2024-11-09 05:29:18,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147680614] [2024-11-09 05:29:18,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:29:18,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 05:29:18,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:29:18,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 05:29:18,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2024-11-09 05:29:18,040 INFO L87 Difference]: Start difference. First operand 178 states and 190 transitions. Second operand has 22 states, 21 states have (on average 5.095238095238095) internal successors, (107), 22 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 05:29:19,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:29:19,369 INFO L93 Difference]: Finished difference Result 281 states and 318 transitions. [2024-11-09 05:29:19,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-09 05:29:19,371 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 5.095238095238095) internal successors, (107), 22 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2024-11-09 05:29:19,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:29:19,372 INFO L225 Difference]: With dead ends: 281 [2024-11-09 05:29:19,372 INFO L226 Difference]: Without dead ends: 281 [2024-11-09 05:29:19,373 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 267 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=473, Invalid=1977, Unknown=0, NotChecked=0, Total=2450 [2024-11-09 05:29:19,374 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 81 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:29:19,374 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 40 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:29:19,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2024-11-09 05:29:19,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 244. [2024-11-09 05:29:19,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 240 states have (on average 1.15) internal successors, (276), 243 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 05:29:19,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 276 transitions. [2024-11-09 05:29:19,383 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 276 transitions. Word has length 98 [2024-11-09 05:29:19,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:29:19,384 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 276 transitions. [2024-11-09 05:29:19,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 5.095238095238095) internal successors, (107), 22 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 05:29:19,385 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 276 transitions. [2024-11-09 05:29:19,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-09 05:29:19,386 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:29:19,386 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 6, 6, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2024-11-09 05:29:19,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-09 05:29:19,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:19,591 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:29:19,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:29:19,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1472651342, now seen corresponding path program 4 times [2024-11-09 05:29:19,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:29:19,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527191012] [2024-11-09 05:29:19,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:19,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:29:19,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:19,875 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2024-11-09 05:29:19,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:29:19,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527191012] [2024-11-09 05:29:19,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527191012] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:29:19,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804551733] [2024-11-09 05:29:19,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:29:19,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:19,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:29:19,878 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:29:19,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 05:29:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:20,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 05:29:20,066 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:29:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2024-11-09 05:29:20,199 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:29:20,649 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 25 proven. 388 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-11-09 05:29:20,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804551733] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:29:20,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1215372283] [2024-11-09 05:29:20,651 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-09 05:29:20,652 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:29:20,652 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:29:20,652 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:29:20,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:29:21,900 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:29:22,195 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8708#true' at error location [2024-11-09 05:29:22,195 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:29:22,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:29:22,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 11] total 17 [2024-11-09 05:29:22,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520316239] [2024-11-09 05:29:22,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:29:22,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 05:29:22,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:29:22,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 05:29:22,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2024-11-09 05:29:22,199 INFO L87 Difference]: Start difference. First operand 244 states and 276 transitions. Second operand has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 17 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:29:22,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:29:22,979 INFO L93 Difference]: Finished difference Result 414 states and 480 transitions. [2024-11-09 05:29:22,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 05:29:22,983 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 17 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2024-11-09 05:29:22,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:29:22,985 INFO L225 Difference]: With dead ends: 414 [2024-11-09 05:29:22,985 INFO L226 Difference]: Without dead ends: 414 [2024-11-09 05:29:22,986 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 284 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2024-11-09 05:29:22,987 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 155 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:29:22,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 250 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:29:22,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2024-11-09 05:29:22,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 388. [2024-11-09 05:29:22,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 384 states have (on average 1.1927083333333333) internal successors, (458), 387 states have internal predecessors, (458), 0 states have call successors, (0), 0 states 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 05:29:22,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 458 transitions. [2024-11-09 05:29:22,999 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 458 transitions. Word has length 102 [2024-11-09 05:29:23,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:29:23,002 INFO L471 AbstractCegarLoop]: Abstraction has 388 states and 458 transitions. [2024-11-09 05:29:23,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 17 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:29:23,003 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 458 transitions. [2024-11-09 05:29:23,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-11-09 05:29:23,004 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:29:23,005 INFO L215 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 5, 5, 4, 4, 4, 1, 1] [2024-11-09 05:29:23,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-09 05:29:23,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 05:29:23,205 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:29:23,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:29:23,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1194898586, now seen corresponding path program 5 times [2024-11-09 05:29:23,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:29:23,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358794427] [2024-11-09 05:29:23,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:23,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:29:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1314 backedges. 201 proven. 1019 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-11-09 05:29:23,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:29:23,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358794427] [2024-11-09 05:29:23,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358794427] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:29:23,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555244540] [2024-11-09 05:29:23,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:29:23,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:23,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:29:23,935 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:29:23,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 05:29:24,133 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 05:29:24,133 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:29:24,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 05:29:24,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:29:24,148 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 6 treesize of output 5 [2024-11-09 05:29:24,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:29:24,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-09 05:29:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1314 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 638 trivial. 0 not checked. [2024-11-09 05:29:24,750 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:29:25,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1314 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 638 trivial. 0 not checked. [2024-11-09 05:29:25,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555244540] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:29:25,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1837831210] [2024-11-09 05:29:25,760 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:29:25,760 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:29:25,762 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:29:25,763 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:29:25,763 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:29:26,540 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:29:27,275 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10900#(exists ((|v_ULTIMATE.start_foo_~i~0#1_467| Int)) (and (<= 33 (mod |v_ULTIMATE.start_foo_~i~0#1_467| 4294967296)) (<= |v_ULTIMATE.start_foo_~i~0#1_467| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_467|)))' at error location [2024-11-09 05:29:27,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:29:27,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:29:27,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 3, 3] total 23 [2024-11-09 05:29:27,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304597787] [2024-11-09 05:29:27,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:29:27,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 05:29:27,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:29:27,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 05:29:27,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2024-11-09 05:29:27,278 INFO L87 Difference]: Start difference. First operand 388 states and 458 transitions. Second operand has 24 states, 24 states have (on average 5.0) internal successors, (120), 23 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 05:29:28,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:29:28,907 INFO L93 Difference]: Finished difference Result 370 states and 429 transitions. [2024-11-09 05:29:28,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-09 05:29:28,908 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.0) internal successors, (120), 23 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 122 [2024-11-09 05:29:28,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:29:28,910 INFO L225 Difference]: With dead ends: 370 [2024-11-09 05:29:28,910 INFO L226 Difference]: Without dead ends: 370 [2024-11-09 05:29:28,912 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 348 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=992, Invalid=3564, Unknown=0, NotChecked=0, Total=4556 [2024-11-09 05:29:28,912 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 89 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:29:28,913 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 12 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:29:28,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2024-11-09 05:29:28,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 259. [2024-11-09 05:29:28,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 256 states have (on average 1.06640625) internal successors, (273), 258 states have internal predecessors, (273), 0 states have call successors, (0), 0 states 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 05:29:28,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 273 transitions. [2024-11-09 05:29:28,922 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 273 transitions. Word has length 122 [2024-11-09 05:29:28,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:29:28,922 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 273 transitions. [2024-11-09 05:29:28,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.0) internal successors, (120), 23 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 05:29:28,923 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 273 transitions. [2024-11-09 05:29:28,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-11-09 05:29:28,924 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:29:28,925 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 6, 6, 6, 6, 5, 1, 1] [2024-11-09 05:29:28,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-09 05:29:29,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-09 05:29:29,129 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:29:29,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:29:29,135 INFO L85 PathProgramCache]: Analyzing trace with hash -789187117, now seen corresponding path program 3 times [2024-11-09 05:29:29,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:29:29,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903387182] [2024-11-09 05:29:29,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:29,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:29:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 687 proven. 178 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2024-11-09 05:29:29,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:29:29,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903387182] [2024-11-09 05:29:29,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903387182] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:29:29,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205346303] [2024-11-09 05:29:29,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:29:29,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:29,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:29:29,897 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:29:29,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 05:29:30,102 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:29:30,102 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:29:30,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 05:29:30,107 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:29:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 819 proven. 363 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2024-11-09 05:29:30,507 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:29:30,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 819 proven. 363 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2024-11-09 05:29:30,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205346303] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:29:30,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1800900118] [2024-11-09 05:29:30,852 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:29:30,852 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:29:30,853 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:29:30,853 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:29:30,853 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:29:31,787 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:29:32,343 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12397#(and (<= |ULTIMATE.start_main_#t~ret2#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~ret2#1|))' at error location [2024-11-09 05:29:32,343 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:29:32,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:29:32,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2024-11-09 05:29:32,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191321859] [2024-11-09 05:29:32,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:29:32,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 05:29:32,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:29:32,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 05:29:32,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1127, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 05:29:32,346 INFO L87 Difference]: Start difference. First operand 259 states and 273 transitions. Second operand has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:29:34,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:29:34,117 INFO L93 Difference]: Finished difference Result 294 states and 315 transitions. [2024-11-09 05:29:34,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 05:29:34,118 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2024-11-09 05:29:34,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:29:34,120 INFO L225 Difference]: With dead ends: 294 [2024-11-09 05:29:34,120 INFO L226 Difference]: Without dead ends: 294 [2024-11-09 05:29:34,121 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 349 SyntacticMatches, 11 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=708, Invalid=3198, Unknown=0, NotChecked=0, Total=3906 [2024-11-09 05:29:34,122 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 65 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:29:34,122 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 5 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 05:29:34,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2024-11-09 05:29:34,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 279. [2024-11-09 05:29:34,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 276 states have (on average 1.0724637681159421) internal successors, (296), 278 states have internal predecessors, (296), 0 states have call successors, (0), 0 states 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 05:29:34,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 296 transitions. [2024-11-09 05:29:34,130 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 296 transitions. Word has length 127 [2024-11-09 05:29:34,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:29:34,131 INFO L471 AbstractCegarLoop]: Abstraction has 279 states and 296 transitions. [2024-11-09 05:29:34,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:29:34,132 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 296 transitions. [2024-11-09 05:29:34,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-09 05:29:34,133 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:29:34,134 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 6, 6, 6, 6, 5, 1, 1] [2024-11-09 05:29:34,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-09 05:29:34,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:34,334 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:29:34,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:29:34,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1130457133, now seen corresponding path program 4 times [2024-11-09 05:29:34,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:29:34,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004167964] [2024-11-09 05:29:34,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:34,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:29:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1531 backedges. 654 proven. 717 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2024-11-09 05:29:35,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:29:35,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004167964] [2024-11-09 05:29:35,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004167964] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:29:35,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552308334] [2024-11-09 05:29:35,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:29:35,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:35,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:29:35,016 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:29:35,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 05:29:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:35,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 05:29:35,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:29:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1531 backedges. 770 proven. 601 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2024-11-09 05:29:35,686 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:29:36,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1531 backedges. 770 proven. 601 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2024-11-09 05:29:36,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552308334] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:29:36,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1618097920] [2024-11-09 05:29:36,045 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:29:36,045 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:29:36,046 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:29:36,046 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:29:36,046 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:29:36,960 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:29:37,481 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13862#(and (<= |ULTIMATE.start_main_#t~ret2#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~ret2#1|))' at error location [2024-11-09 05:29:37,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:29:37,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:29:37,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2024-11-09 05:29:37,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3916143] [2024-11-09 05:29:37,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:29:37,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-09 05:29:37,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:29:37,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-09 05:29:37,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 05:29:37,484 INFO L87 Difference]: Start difference. First operand 279 states and 296 transitions. Second operand has 30 states, 30 states have (on average 4.566666666666666) internal successors, (137), 29 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:29:38,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:29:38,423 INFO L93 Difference]: Finished difference Result 315 states and 340 transitions. [2024-11-09 05:29:38,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-09 05:29:38,424 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.566666666666666) internal successors, (137), 29 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2024-11-09 05:29:38,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:29:38,425 INFO L225 Difference]: With dead ends: 315 [2024-11-09 05:29:38,425 INFO L226 Difference]: Without dead ends: 315 [2024-11-09 05:29:38,427 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 371 SyntacticMatches, 12 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=811, Invalid=3095, Unknown=0, NotChecked=0, Total=3906 [2024-11-09 05:29:38,427 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 78 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:29:38,428 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 20 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:29:38,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2024-11-09 05:29:38,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 299. [2024-11-09 05:29:38,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 296 states have (on average 1.0810810810810811) internal successors, (320), 298 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:29:38,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 320 transitions. [2024-11-09 05:29:38,436 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 320 transitions. Word has length 135 [2024-11-09 05:29:38,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:29:38,437 INFO L471 AbstractCegarLoop]: Abstraction has 299 states and 320 transitions. [2024-11-09 05:29:38,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.566666666666666) internal successors, (137), 29 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:29:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 320 transitions. [2024-11-09 05:29:38,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-09 05:29:38,439 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:29:38,439 INFO L215 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 6, 6, 6, 6, 5, 1, 1] [2024-11-09 05:29:38,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-09 05:29:38,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-09 05:29:38,644 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:29:38,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:29:38,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1877613765, now seen corresponding path program 5 times [2024-11-09 05:29:38,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:29:38,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877785664] [2024-11-09 05:29:38,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:38,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:29:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 0 proven. 1390 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2024-11-09 05:29:39,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:29:39,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877785664] [2024-11-09 05:29:39,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877785664] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:29:39,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16356020] [2024-11-09 05:29:39,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:29:39,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:39,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:29:39,407 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:29:39,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 05:29:39,575 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 05:29:39,575 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:29:39,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 05:29:39,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:29:39,592 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 05:29:39,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:29:39,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-09 05:29:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 10 proven. 637 refuted. 0 times theorem prover too weak. 994 trivial. 0 not checked. [2024-11-09 05:29:41,486 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:29:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 0 proven. 647 refuted. 0 times theorem prover too weak. 994 trivial. 0 not checked. [2024-11-09 05:29:42,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16356020] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:29:42,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [553355091] [2024-11-09 05:29:42,729 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:29:42,729 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:29:42,730 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:29:42,730 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:29:42,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:29:43,776 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:29:44,519 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15383#(and (<= |ULTIMATE.start_main_#t~ret2#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~ret2#1|))' at error location [2024-11-09 05:29:44,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:29:44,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:29:44,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-09 05:29:44,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037052051] [2024-11-09 05:29:44,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:29:44,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 05:29:44,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:29:44,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 05:29:44,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2024-11-09 05:29:44,523 INFO L87 Difference]: Start difference. First operand 299 states and 320 transitions. Second operand has 19 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:29:46,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:29:46,579 INFO L93 Difference]: Finished difference Result 298 states and 315 transitions. [2024-11-09 05:29:46,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-09 05:29:46,580 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2024-11-09 05:29:46,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:29:46,581 INFO L225 Difference]: With dead ends: 298 [2024-11-09 05:29:46,581 INFO L226 Difference]: Without dead ends: 298 [2024-11-09 05:29:46,582 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 393 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=465, Invalid=2085, Unknown=0, NotChecked=0, Total=2550 [2024-11-09 05:29:46,582 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 05:29:46,583 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 71 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 05:29:46,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2024-11-09 05:29:46,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2024-11-09 05:29:46,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 296 states have (on average 1.0641891891891893) internal successors, (315), 297 states have internal predecessors, (315), 0 states have call successors, (0), 0 states 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 05:29:46,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 315 transitions. [2024-11-09 05:29:46,592 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 315 transitions. Word has length 139 [2024-11-09 05:29:46,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:29:46,592 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 315 transitions. [2024-11-09 05:29:46,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:29:46,593 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 315 transitions. [2024-11-09 05:29:46,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-11-09 05:29:46,595 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:29:46,595 INFO L215 NwaCegarLoop]: trace histogram [32, 32, 32, 31, 7, 7, 6, 6, 6, 1, 1] [2024-11-09 05:29:46,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-09 05:29:46,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-09 05:29:46,796 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:29:46,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:29:46,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1313644118, now seen corresponding path program 3 times [2024-11-09 05:29:46,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:29:46,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125207443] [2024-11-09 05:29:46,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:46,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:29:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2263 backedges. 0 proven. 822 refuted. 0 times theorem prover too weak. 1441 trivial. 0 not checked. [2024-11-09 05:29:47,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:29:47,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125207443] [2024-11-09 05:29:47,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125207443] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:29:47,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617736112] [2024-11-09 05:29:47,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:29:47,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:47,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:29:47,895 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:29:47,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 05:29:48,272 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:29:48,273 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:29:48,278 INFO L255 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 05:29:48,282 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:29:48,296 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 05:29:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2263 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 1653 trivial. 0 not checked. [2024-11-09 05:29:49,261 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:29:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2263 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 1653 trivial. 0 not checked. [2024-11-09 05:29:50,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617736112] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:29:50,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1539373484] [2024-11-09 05:29:50,259 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:29:50,259 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:29:50,259 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:29:50,259 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:29:50,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:29:50,884 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:29:51,632 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17018#(exists ((|v_ULTIMATE.start_foo_~b#1.base_162| Int) (|v_ULTIMATE.start_foo_~i~0#1_684| Int) (|v_ULTIMATE.start_foo_~b#1.offset_161| Int)) (and (<= (mod |v_ULTIMATE.start_foo_~i~0#1_684| 4294967296) 32) (or (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_162|) (+ |v_ULTIMATE.start_foo_~i~0#1_684| |v_ULTIMATE.start_foo_~b#1.offset_161| 1)) (< (+ |v_ULTIMATE.start_foo_~i~0#1_684| |v_ULTIMATE.start_foo_~b#1.offset_161|) 0)) (<= |v_ULTIMATE.start_foo_~i~0#1_684| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_684|)))' at error location [2024-11-09 05:29:51,632 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:29:51,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:29:51,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2024-11-09 05:29:51,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102035985] [2024-11-09 05:29:51,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:29:51,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 05:29:51,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:29:51,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 05:29:51,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2024-11-09 05:29:51,634 INFO L87 Difference]: Start difference. First operand 298 states and 315 transitions. Second operand has 21 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:29:52,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:29:52,243 INFO L93 Difference]: Finished difference Result 388 states and 412 transitions. [2024-11-09 05:29:52,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 05:29:52,244 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2024-11-09 05:29:52,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:29:52,245 INFO L225 Difference]: With dead ends: 388 [2024-11-09 05:29:52,245 INFO L226 Difference]: Without dead ends: 388 [2024-11-09 05:29:52,246 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 456 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=299, Invalid=1261, Unknown=0, NotChecked=0, Total=1560 [2024-11-09 05:29:52,247 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:29:52,251 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 60 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:29:52,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2024-11-09 05:29:52,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 358. [2024-11-09 05:29:52,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 356 states have (on average 1.0646067415730338) internal successors, (379), 357 states have internal predecessors, (379), 0 states have call successors, (0), 0 states 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 05:29:52,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 379 transitions. [2024-11-09 05:29:52,261 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 379 transitions. Word has length 161 [2024-11-09 05:29:52,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:29:52,261 INFO L471 AbstractCegarLoop]: Abstraction has 358 states and 379 transitions. [2024-11-09 05:29:52,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:29:52,262 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 379 transitions. [2024-11-09 05:29:52,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2024-11-09 05:29:52,264 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:29:52,264 INFO L215 NwaCegarLoop]: trace histogram [38, 38, 38, 37, 7, 7, 6, 6, 6, 1, 1] [2024-11-09 05:29:52,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-09 05:29:52,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-09 05:29:52,470 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:29:52,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:29:52,471 INFO L85 PathProgramCache]: Analyzing trace with hash 215317818, now seen corresponding path program 4 times [2024-11-09 05:29:52,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:29:52,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83723235] [2024-11-09 05:29:52,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:52,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:29:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3127 backedges. 264 proven. 2612 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2024-11-09 05:29:53,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:29:53,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83723235] [2024-11-09 05:29:53,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83723235] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:29:53,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193404235] [2024-11-09 05:29:53,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:29:53,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:53,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:29:53,488 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:29:53,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 05:29:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:53,802 INFO L255 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 05:29:53,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:29:54,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3127 backedges. 519 proven. 2347 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2024-11-09 05:29:54,464 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:29:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3127 backedges. 519 proven. 2347 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2024-11-09 05:29:54,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193404235] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:29:54,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [816685885] [2024-11-09 05:29:54,991 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:29:54,991 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:29:54,991 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:29:54,991 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:29:54,992 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:29:55,860 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:29:56,556 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18930#(exists ((|v_ULTIMATE.start_foo_~b#1.offset_177| Int) (|v_ULTIMATE.start_foo_~i~0#1_754| Int) (|v_ULTIMATE.start_foo_~b#1.base_178| Int)) (and (<= (mod |v_ULTIMATE.start_foo_~i~0#1_754| 4294967296) 32) (<= |v_ULTIMATE.start_foo_~i~0#1_754| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_754|) (or (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_178|) (+ |v_ULTIMATE.start_foo_~i~0#1_754| |v_ULTIMATE.start_foo_~b#1.offset_177| 1)) (< (+ |v_ULTIMATE.start_foo_~i~0#1_754| |v_ULTIMATE.start_foo_~b#1.offset_177|) 0))))' at error location [2024-11-09 05:29:56,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:29:56,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:29:56,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 30 [2024-11-09 05:29:56,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917444029] [2024-11-09 05:29:56,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:29:56,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 05:29:56,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:29:56,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 05:29:56,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 05:29:56,559 INFO L87 Difference]: Start difference. First operand 358 states and 379 transitions. Second operand has 31 states, 31 states have (on average 4.935483870967742) internal successors, (153), 30 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 05:29:58,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:29:58,125 INFO L93 Difference]: Finished difference Result 356 states and 374 transitions. [2024-11-09 05:29:58,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-09 05:29:58,125 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.935483870967742) internal successors, (153), 30 states have internal predecessors, (153), 0 states have call successors, (0), 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 185 [2024-11-09 05:29:58,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:29:58,127 INFO L225 Difference]: With dead ends: 356 [2024-11-09 05:29:58,127 INFO L226 Difference]: Without dead ends: 356 [2024-11-09 05:29:58,129 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 515 SyntacticMatches, 21 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2307 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1259, Invalid=5061, Unknown=0, NotChecked=0, Total=6320 [2024-11-09 05:29:58,130 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 56 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:29:58,131 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 13 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:29:58,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2024-11-09 05:29:58,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 347. [2024-11-09 05:29:58,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 345 states have (on average 1.0521739130434782) internal successors, (363), 346 states have internal predecessors, (363), 0 states have call successors, (0), 0 states 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 05:29:58,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 363 transitions. [2024-11-09 05:29:58,140 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 363 transitions. Word has length 185 [2024-11-09 05:29:58,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:29:58,141 INFO L471 AbstractCegarLoop]: Abstraction has 347 states and 363 transitions. [2024-11-09 05:29:58,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.935483870967742) internal successors, (153), 30 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 05:29:58,141 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 363 transitions. [2024-11-09 05:29:58,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2024-11-09 05:29:58,144 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:29:58,144 INFO L215 NwaCegarLoop]: trace histogram [45, 45, 45, 44, 8, 8, 7, 7, 7, 1, 1] [2024-11-09 05:29:58,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-09 05:29:58,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 05:29:58,349 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:29:58,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:29:58,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1993087700, now seen corresponding path program 5 times [2024-11-09 05:29:58,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:29:58,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454479312] [2024-11-09 05:29:58,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:58,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:29:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4394 backedges. 2844 proven. 1079 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2024-11-09 05:29:59,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:29:59,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454479312] [2024-11-09 05:29:59,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454479312] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:29:59,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733718795] [2024-11-09 05:29:59,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:29:59,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:59,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:29:59,417 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:29:59,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-09 05:29:59,758 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-09 05:29:59,758 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:29:59,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 05:29:59,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:29:59,780 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 05:30:01,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4394 backedges. 867 proven. 1694 refuted. 0 times theorem prover too weak. 1833 trivial. 0 not checked. [2024-11-09 05:30:01,508 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:30:03,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4394 backedges. 0 proven. 2561 refuted. 0 times theorem prover too weak. 1833 trivial. 0 not checked. [2024-11-09 05:30:03,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733718795] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:30:03,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1003393268] [2024-11-09 05:30:03,319 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:30:03,319 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:30:03,319 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:30:03,319 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:30:03,320 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:30:04,296 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:30:05,176 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21071#(exists ((|v_ULTIMATE.start_foo_~b#1.base_195| Int) (|v_ULTIMATE.start_foo_~b#1.offset_194| Int) (|v_ULTIMATE.start_foo_~i~0#1_830| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~i~0#1_830|) (<= |v_ULTIMATE.start_foo_~i~0#1_830| (+ |ULTIMATE.start_foo_~size#1| 1)) (or (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_195|) (+ |v_ULTIMATE.start_foo_~i~0#1_830| |v_ULTIMATE.start_foo_~b#1.offset_194| 1)) (< (+ |v_ULTIMATE.start_foo_~i~0#1_830| |v_ULTIMATE.start_foo_~b#1.offset_194|) 0)) (<= (mod |v_ULTIMATE.start_foo_~i~0#1_830| 4294967296) 32)))' at error location [2024-11-09 05:30:05,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:30:05,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:30:05,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 44 [2024-11-09 05:30:05,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201765405] [2024-11-09 05:30:05,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:30:05,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-09 05:30:05,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:30:05,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-09 05:30:05,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=2274, Unknown=0, NotChecked=0, Total=2652 [2024-11-09 05:30:05,180 INFO L87 Difference]: Start difference. First operand 347 states and 363 transitions. Second operand has 45 states, 45 states have (on average 4.466666666666667) internal successors, (201), 44 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 05:30:16,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:30:16,283 INFO L93 Difference]: Finished difference Result 468 states and 506 transitions. [2024-11-09 05:30:16,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2024-11-09 05:30:16,284 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.466666666666667) internal successors, (201), 44 states have internal predecessors, (201), 0 states have call successors, (0), 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 218 [2024-11-09 05:30:16,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:30:16,285 INFO L225 Difference]: With dead ends: 468 [2024-11-09 05:30:16,285 INFO L226 Difference]: Without dead ends: 468 [2024-11-09 05:30:16,290 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 611 SyntacticMatches, 7 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9120 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=5511, Invalid=22881, Unknown=0, NotChecked=0, Total=28392 [2024-11-09 05:30:16,290 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 723 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:30:16,291 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [723 Valid, 5 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1612 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-09 05:30:16,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2024-11-09 05:30:16,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 450. [2024-11-09 05:30:16,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 448 states have (on average 1.0825892857142858) internal successors, (485), 449 states have internal predecessors, (485), 0 states have call successors, (0), 0 states 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 05:30:16,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 485 transitions. [2024-11-09 05:30:16,301 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 485 transitions. Word has length 218 [2024-11-09 05:30:16,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:30:16,302 INFO L471 AbstractCegarLoop]: Abstraction has 450 states and 485 transitions. [2024-11-09 05:30:16,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.466666666666667) internal successors, (201), 44 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 05:30:16,303 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 485 transitions. [2024-11-09 05:30:16,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2024-11-09 05:30:16,310 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:30:16,310 INFO L215 NwaCegarLoop]: trace histogram [59, 59, 59, 59, 10, 10, 10, 10, 10, 6, 6, 5, 5, 1, 1, 1, 1] [2024-11-09 05:30:16,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-09 05:30:16,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 05:30:16,515 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:30:16,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:30:16,515 INFO L85 PathProgramCache]: Analyzing trace with hash -803689846, now seen corresponding path program 5 times [2024-11-09 05:30:16,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:30:16,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738905040] [2024-11-09 05:30:16,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:30:16,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:30:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:30:17,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7724 backedges. 3110 proven. 447 refuted. 0 times theorem prover too weak. 4167 trivial. 0 not checked. [2024-11-09 05:30:17,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:30:17,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738905040] [2024-11-09 05:30:17,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738905040] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:30:17,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593086119] [2024-11-09 05:30:17,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:30:17,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:30:17,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:30:17,855 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:30:17,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-09 05:30:18,052 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 05:30:18,052 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:30:18,053 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 05:30:18,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:30:18,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:30:18,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-09 05:30:18,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 05:30:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7724 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 7705 trivial. 0 not checked. [2024-11-09 05:30:19,399 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:30:19,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593086119] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:30:19,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:30:19,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 26 [2024-11-09 05:30:19,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117044099] [2024-11-09 05:30:19,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:30:19,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:30:19,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:30:19,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:30:19,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2024-11-09 05:30:19,402 INFO L87 Difference]: Start difference. First operand 450 states and 485 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states 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 05:30:19,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:30:19,457 INFO L93 Difference]: Finished difference Result 449 states and 484 transitions. [2024-11-09 05:30:19,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:30:19,457 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 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 312 [2024-11-09 05:30:19,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:30:19,459 INFO L225 Difference]: With dead ends: 449 [2024-11-09 05:30:19,459 INFO L226 Difference]: Without dead ends: 425 [2024-11-09 05:30:19,460 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2024-11-09 05:30:19,461 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:30:19,461 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 17 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:30:19,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2024-11-09 05:30:19,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 350. [2024-11-09 05:30:19,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 1.0716332378223496) internal successors, (374), 349 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 05:30:19,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 374 transitions. [2024-11-09 05:30:19,469 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 374 transitions. Word has length 312 [2024-11-09 05:30:19,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:30:19,470 INFO L471 AbstractCegarLoop]: Abstraction has 350 states and 374 transitions. [2024-11-09 05:30:19,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states 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 05:30:19,470 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 374 transitions. [2024-11-09 05:30:19,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2024-11-09 05:30:19,472 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:30:19,472 INFO L215 NwaCegarLoop]: trace histogram [70, 70, 70, 69, 10, 10, 9, 9, 9, 1, 1] [2024-11-09 05:30:19,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-09 05:30:19,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:30:19,677 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:30:19,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:30:19,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1505310572, now seen corresponding path program 6 times [2024-11-09 05:30:19,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:30:19,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467734769] [2024-11-09 05:30:19,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:30:19,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:30:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:30:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10488 backedges. 7344 proven. 1338 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2024-11-09 05:30:20,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:30:20,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467734769] [2024-11-09 05:30:20,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467734769] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:30:20,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287315124] [2024-11-09 05:30:20,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:30:20,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:30:20,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:30:20,979 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:30:20,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-09 05:30:22,012 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:30:22,013 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:30:22,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 1157 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 05:30:22,026 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:30:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 10488 backedges. 7344 proven. 1338 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2024-11-09 05:30:22,686 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:30:23,175 INFO L134 CoverageAnalysis]: Checked inductivity of 10488 backedges. 7344 proven. 1338 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2024-11-09 05:30:23,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287315124] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:30:23,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [104575553] [2024-11-09 05:30:23,177 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:30:23,178 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:30:23,178 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:30:23,178 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:30:23,179 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:30:24,187 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:30:25,192 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25979#(exists ((|v_ULTIMATE.start_foo_~b#1.base_216| Int) (|v_ULTIMATE.start_foo_~b#1.offset_215| Int) (|v_ULTIMATE.start_foo_~i~0#1_932| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~i~0#1_932|) (<= (mod |v_ULTIMATE.start_foo_~i~0#1_932| 4294967296) 32) (<= |v_ULTIMATE.start_foo_~i~0#1_932| (+ |ULTIMATE.start_foo_~size#1| 1)) (or (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_216|) (+ |v_ULTIMATE.start_foo_~i~0#1_932| |v_ULTIMATE.start_foo_~b#1.offset_215| 1)) (< (+ |v_ULTIMATE.start_foo_~i~0#1_932| |v_ULTIMATE.start_foo_~b#1.offset_215|) 0))))' at error location [2024-11-09 05:30:25,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:30:25,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:30:25,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 28 [2024-11-09 05:30:25,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691657795] [2024-11-09 05:30:25,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:30:25,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 05:30:25,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:30:25,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 05:30:25,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1007, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 05:30:25,196 INFO L87 Difference]: Start difference. First operand 350 states and 374 transitions. Second operand has 29 states, 29 states have (on average 5.103448275862069) internal successors, (148), 28 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:30:26,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:30:26,769 INFO L93 Difference]: Finished difference Result 357 states and 379 transitions. [2024-11-09 05:30:26,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-09 05:30:26,770 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.103448275862069) internal successors, (148), 28 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 328 [2024-11-09 05:30:26,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:30:26,772 INFO L225 Difference]: With dead ends: 357 [2024-11-09 05:30:26,772 INFO L226 Difference]: Without dead ends: 357 [2024-11-09 05:30:26,773 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1045 GetRequests, 942 SyntacticMatches, 24 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1566, Invalid=4914, Unknown=0, NotChecked=0, Total=6480 [2024-11-09 05:30:26,774 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 51 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:30:26,774 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 22 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:30:26,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2024-11-09 05:30:26,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 354. [2024-11-09 05:30:26,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 1.065155807365439) internal successors, (376), 353 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:30:26,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 376 transitions. [2024-11-09 05:30:26,783 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 376 transitions. Word has length 328 [2024-11-09 05:30:26,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:30:26,784 INFO L471 AbstractCegarLoop]: Abstraction has 354 states and 376 transitions. [2024-11-09 05:30:26,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.103448275862069) internal successors, (148), 28 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:30:26,784 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 376 transitions. [2024-11-09 05:30:26,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2024-11-09 05:30:26,786 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:30:26,787 INFO L215 NwaCegarLoop]: trace histogram [71, 71, 71, 70, 10, 10, 9, 9, 9, 1, 1] [2024-11-09 05:30:26,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-09 05:30:26,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:30:26,988 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:30:26,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:30:26,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1655580716, now seen corresponding path program 7 times [2024-11-09 05:30:26,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:30:26,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251776710] [2024-11-09 05:30:26,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:30:26,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:30:27,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:30:29,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10777 backedges. 3352 proven. 6637 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2024-11-09 05:30:29,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:30:29,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251776710] [2024-11-09 05:30:29,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251776710] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:30:29,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16211903] [2024-11-09 05:30:29,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:30:29,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:30:29,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:30:29,042 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:30:29,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-09 05:30:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:30:29,526 INFO L255 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 05:30:29,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:30:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 10777 backedges. 4049 proven. 5660 refuted. 0 times theorem prover too weak. 1068 trivial. 0 not checked. [2024-11-09 05:30:30,292 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:30:30,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10777 backedges. 4049 proven. 5660 refuted. 0 times theorem prover too weak. 1068 trivial. 0 not checked. [2024-11-09 05:30:30,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16211903] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:30:30,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1951977887] [2024-11-09 05:30:30,987 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:30:30,987 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:30:30,988 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:30:30,988 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:30:30,988 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:30:31,821 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:30:32,825 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28823#(exists ((|v_ULTIMATE.start_foo_~b#1.base_237| Int) (|v_ULTIMATE.start_foo_~b#1.offset_236| Int) (|v_ULTIMATE.start_foo_~i~0#1_1037| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_237|) (+ |v_ULTIMATE.start_foo_~b#1.offset_236| |v_ULTIMATE.start_foo_~i~0#1_1037| 1)) (< (+ |v_ULTIMATE.start_foo_~b#1.offset_236| |v_ULTIMATE.start_foo_~i~0#1_1037|) 0)) (<= (mod |v_ULTIMATE.start_foo_~i~0#1_1037| 4294967296) 32) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_1037|) (<= |v_ULTIMATE.start_foo_~i~0#1_1037| (+ |ULTIMATE.start_foo_~size#1| 1))))' at error location [2024-11-09 05:30:32,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:30:32,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:30:32,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21, 21] total 49 [2024-11-09 05:30:32,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633272595] [2024-11-09 05:30:32,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:30:32,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-09 05:30:32,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:30:32,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-09 05:30:32,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=578, Invalid=2614, Unknown=0, NotChecked=0, Total=3192 [2024-11-09 05:30:32,830 INFO L87 Difference]: Start difference. First operand 354 states and 376 transitions. Second operand has 50 states, 50 states have (on average 4.8) internal successors, (240), 49 states have internal predecessors, (240), 0 states have call successors, (0), 0 states 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 05:30:35,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:30:35,206 INFO L93 Difference]: Finished difference Result 401 states and 423 transitions. [2024-11-09 05:30:35,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-11-09 05:30:35,207 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.8) internal successors, (240), 49 states have internal predecessors, (240), 0 states have call successors, (0), 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 332 [2024-11-09 05:30:35,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:30:35,208 INFO L225 Difference]: With dead ends: 401 [2024-11-09 05:30:35,209 INFO L226 Difference]: Without dead ends: 401 [2024-11-09 05:30:35,211 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1083 GetRequests, 948 SyntacticMatches, 18 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5085 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2878, Invalid=11164, Unknown=0, NotChecked=0, Total=14042 [2024-11-09 05:30:35,212 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 7 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:30:35,212 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 9 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1034 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 05:30:35,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2024-11-09 05:30:35,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 399. [2024-11-09 05:30:35,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 1.0577889447236182) internal successors, (421), 398 states have internal predecessors, (421), 0 states have call successors, (0), 0 states 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 05:30:35,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 421 transitions. [2024-11-09 05:30:35,220 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 421 transitions. Word has length 332 [2024-11-09 05:30:35,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:30:35,220 INFO L471 AbstractCegarLoop]: Abstraction has 399 states and 421 transitions. [2024-11-09 05:30:35,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.8) internal successors, (240), 49 states have internal predecessors, (240), 0 states have call successors, (0), 0 states 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 05:30:35,221 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 421 transitions. [2024-11-09 05:30:35,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2024-11-09 05:30:35,223 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:30:35,223 INFO L215 NwaCegarLoop]: trace histogram [80, 80, 80, 79, 11, 11, 10, 10, 10, 1, 1] [2024-11-09 05:30:35,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-09 05:30:35,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:30:35,424 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:30:35,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:30:35,425 INFO L85 PathProgramCache]: Analyzing trace with hash 577663226, now seen corresponding path program 8 times [2024-11-09 05:30:35,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:30:35,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917341080] [2024-11-09 05:30:35,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:30:35,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:30:35,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:30:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 13685 backedges. 9611 proven. 2115 refuted. 0 times theorem prover too weak. 1959 trivial. 0 not checked. [2024-11-09 05:30:36,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:30:36,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917341080] [2024-11-09 05:30:36,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917341080] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:30:36,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41910996] [2024-11-09 05:30:36,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:30:36,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:30:36,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:30:36,750 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:30:36,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-09 05:30:37,118 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-09 05:30:37,118 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:30:37,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 05:30:37,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:30:37,132 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 05:30:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 13685 backedges. 0 proven. 3366 refuted. 0 times theorem prover too weak. 10319 trivial. 0 not checked. [2024-11-09 05:30:39,004 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:30:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 13685 backedges. 0 proven. 3366 refuted. 0 times theorem prover too weak. 10319 trivial. 0 not checked. [2024-11-09 05:30:41,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41910996] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:30:41,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [460930034] [2024-11-09 05:30:41,228 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:30:41,228 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:30:41,228 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:30:41,228 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:30:41,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:30:41,873 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:30:43,026 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32031#(exists ((|v_ULTIMATE.start_foo_~i~0#1_1152| Int) (|v_ULTIMATE.start_foo_~b#1.offset_259| Int) (|v_ULTIMATE.start_foo_~b#1.base_260| Int)) (and (<= (mod |v_ULTIMATE.start_foo_~i~0#1_1152| 4294967296) 32) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_1152|) (<= |v_ULTIMATE.start_foo_~i~0#1_1152| (+ |ULTIMATE.start_foo_~size#1| 1)) (or (< (+ |v_ULTIMATE.start_foo_~b#1.offset_259| |v_ULTIMATE.start_foo_~i~0#1_1152|) 0) (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_260|) (+ |v_ULTIMATE.start_foo_~b#1.offset_259| |v_ULTIMATE.start_foo_~i~0#1_1152| 1)))))' at error location [2024-11-09 05:30:43,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:30:43,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:30:43,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 12] total 44 [2024-11-09 05:30:43,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673205992] [2024-11-09 05:30:43,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:30:43,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-09 05:30:43,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:30:43,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-09 05:30:43,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2257, Unknown=0, NotChecked=0, Total=2652 [2024-11-09 05:30:43,030 INFO L87 Difference]: Start difference. First operand 399 states and 421 transitions. Second operand has 45 states, 45 states have (on average 5.155555555555556) internal successors, (232), 44 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 05:30:48,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:30:48,862 INFO L93 Difference]: Finished difference Result 464 states and 490 transitions. [2024-11-09 05:30:48,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-11-09 05:30:48,863 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 5.155555555555556) internal successors, (232), 44 states have internal predecessors, (232), 0 states have call successors, (0), 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 373 [2024-11-09 05:30:48,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:30:48,864 INFO L225 Difference]: With dead ends: 464 [2024-11-09 05:30:48,864 INFO L226 Difference]: Without dead ends: 464 [2024-11-09 05:30:48,867 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1220 GetRequests, 1077 SyntacticMatches, 10 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4680 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=4053, Invalid=14037, Unknown=0, NotChecked=0, Total=18090 [2024-11-09 05:30:48,868 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 222 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 05:30:48,868 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 0 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 05:30:48,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2024-11-09 05:30:48,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 426. [2024-11-09 05:30:48,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 1.0494117647058823) internal successors, (446), 425 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:30:48,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 446 transitions. [2024-11-09 05:30:48,876 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 446 transitions. Word has length 373 [2024-11-09 05:30:48,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:30:48,877 INFO L471 AbstractCegarLoop]: Abstraction has 426 states and 446 transitions. [2024-11-09 05:30:48,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.155555555555556) internal successors, (232), 44 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 05:30:48,877 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 446 transitions. [2024-11-09 05:30:48,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2024-11-09 05:30:48,880 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:30:48,881 INFO L215 NwaCegarLoop]: trace histogram [93, 93, 93, 92, 11, 11, 10, 10, 10, 1, 1] [2024-11-09 05:30:48,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-09 05:30:49,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-09 05:30:49,081 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:30:49,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:30:49,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1413528398, now seen corresponding path program 9 times [2024-11-09 05:30:49,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:30:49,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293572486] [2024-11-09 05:30:49,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:30:49,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:30:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:30:53,678 INFO L134 CoverageAnalysis]: Checked inductivity of 18287 backedges. 1696 proven. 15873 refuted. 0 times theorem prover too weak. 718 trivial. 0 not checked. [2024-11-09 05:30:53,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:30:53,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293572486] [2024-11-09 05:30:53,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293572486] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:30:53,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812689443] [2024-11-09 05:30:53,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:30:53,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:30:53,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:30:53,682 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:30:53,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-09 05:30:55,163 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:30:55,163 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:30:55,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 1464 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 05:30:55,178 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:30:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 18287 backedges. 7337 proven. 9132 refuted. 0 times theorem prover too weak. 1818 trivial. 0 not checked. [2024-11-09 05:30:56,463 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:30:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 18287 backedges. 7337 proven. 9132 refuted. 0 times theorem prover too weak. 1818 trivial. 0 not checked. [2024-11-09 05:30:57,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812689443] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:30:57,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [366346212] [2024-11-09 05:30:57,683 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:30:57,683 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:30:57,683 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:30:57,684 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:30:57,684 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:30:58,490 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:30:59,921 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35720#(exists ((|v_ULTIMATE.start_foo_~b#1.base_283| Int) (|v_ULTIMATE.start_foo_~b#1.offset_282| Int) (|v_ULTIMATE.start_foo_~i~0#1_1286| Int)) (and (<= (mod |v_ULTIMATE.start_foo_~i~0#1_1286| 4294967296) 32) (<= |v_ULTIMATE.start_foo_~i~0#1_1286| (+ |ULTIMATE.start_foo_~size#1| 1)) (or (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_283|) (+ |v_ULTIMATE.start_foo_~b#1.offset_282| |v_ULTIMATE.start_foo_~i~0#1_1286| 1)) (< (+ |v_ULTIMATE.start_foo_~b#1.offset_282| |v_ULTIMATE.start_foo_~i~0#1_1286|) 0)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_1286|)))' at error location [2024-11-09 05:30:59,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:30:59,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:30:59,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 27, 27] total 81 [2024-11-09 05:30:59,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424343702] [2024-11-09 05:30:59,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:30:59,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-09 05:30:59,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:30:59,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-09 05:30:59,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=6607, Unknown=0, NotChecked=0, Total=7832 [2024-11-09 05:30:59,927 INFO L87 Difference]: Start difference. First operand 426 states and 446 transitions. Second operand has 82 states, 82 states have (on average 4.829268292682927) internal successors, (396), 81 states have internal predecessors, (396), 0 states have call successors, (0), 0 states 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 05:31:06,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:31:06,250 INFO L93 Difference]: Finished difference Result 713 states and 748 transitions. [2024-11-09 05:31:06,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2024-11-09 05:31:06,251 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 4.829268292682927) internal successors, (396), 81 states have internal predecessors, (396), 0 states have call successors, (0), 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 425 [2024-11-09 05:31:06,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:31:06,253 INFO L225 Difference]: With dead ends: 713 [2024-11-09 05:31:06,253 INFO L226 Difference]: Without dead ends: 713 [2024-11-09 05:31:06,257 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1458 GetRequests, 1216 SyntacticMatches, 23 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22152 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=10245, Invalid=38375, Unknown=0, NotChecked=0, Total=48620 [2024-11-09 05:31:06,258 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 33 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 1840 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:31:06,258 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 10 Invalid, 1888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1840 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 05:31:06,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2024-11-09 05:31:06,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 711. [2024-11-09 05:31:06,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 1.0507042253521126) internal successors, (746), 710 states have internal predecessors, (746), 0 states have call successors, (0), 0 states 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 05:31:06,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 746 transitions. [2024-11-09 05:31:06,272 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 746 transitions. Word has length 425 [2024-11-09 05:31:06,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:31:06,273 INFO L471 AbstractCegarLoop]: Abstraction has 711 states and 746 transitions. [2024-11-09 05:31:06,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 4.829268292682927) internal successors, (396), 81 states have internal predecessors, (396), 0 states have call successors, (0), 0 states 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 05:31:06,273 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 746 transitions. [2024-11-09 05:31:06,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2024-11-09 05:31:06,279 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:31:06,280 INFO L215 NwaCegarLoop]: trace histogram [143, 143, 143, 142, 16, 16, 15, 15, 15, 1, 1] [2024-11-09 05:31:06,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-09 05:31:06,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-09 05:31:06,481 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:31:06,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:31:06,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1503788172, now seen corresponding path program 10 times [2024-11-09 05:31:06,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:31:06,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984528449] [2024-11-09 05:31:06,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:31:06,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:31:06,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:31:09,174 INFO L134 CoverageAnalysis]: Checked inductivity of 43312 backedges. 24318 proven. 681 refuted. 0 times theorem prover too weak. 18313 trivial. 0 not checked. [2024-11-09 05:31:09,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:31:09,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984528449] [2024-11-09 05:31:09,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984528449] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:31:09,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998179958] [2024-11-09 05:31:09,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:31:09,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:31:09,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:31:09,178 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:31:09,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-09 05:31:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:31:09,879 INFO L255 TraceCheckSpWp]: Trace formula consists of 2219 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 05:31:09,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:31:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 43312 backedges. 27306 proven. 2503 refuted. 0 times theorem prover too weak. 13503 trivial. 0 not checked. [2024-11-09 05:31:10,774 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:31:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 43312 backedges. 27306 proven. 2503 refuted. 0 times theorem prover too weak. 13503 trivial. 0 not checked. [2024-11-09 05:31:11,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998179958] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:31:11,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1592154924] [2024-11-09 05:31:11,476 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:31:11,476 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:31:11,477 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:31:11,477 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:31:11,477 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:31:12,300 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:31:13,647 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '41354#(exists ((|v_ULTIMATE.start_foo_~b#1.offset_315| Int) (|v_ULTIMATE.start_foo_~b#1.base_316| Int) (|v_ULTIMATE.start_foo_~i~0#1_1469| Int)) (and (<= (mod |v_ULTIMATE.start_foo_~i~0#1_1469| 4294967296) 32) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_1469|) (<= |v_ULTIMATE.start_foo_~i~0#1_1469| (+ |ULTIMATE.start_foo_~size#1| 1)) (or (< (+ |v_ULTIMATE.start_foo_~b#1.offset_315| |v_ULTIMATE.start_foo_~i~0#1_1469|) 0) (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_316|) (+ |v_ULTIMATE.start_foo_~b#1.offset_315| |v_ULTIMATE.start_foo_~i~0#1_1469| 1)))))' at error location [2024-11-09 05:31:13,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:31:13,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:31:13,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22, 22] total 45 [2024-11-09 05:31:13,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96630795] [2024-11-09 05:31:13,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:31:13,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-09 05:31:13,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:31:13,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-09 05:31:13,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=2248, Unknown=0, NotChecked=0, Total=2652 [2024-11-09 05:31:13,650 INFO L87 Difference]: Start difference. First operand 711 states and 746 transitions. Second operand has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 0 states 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 05:31:17,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:31:17,257 INFO L93 Difference]: Finished difference Result 711 states and 739 transitions. [2024-11-09 05:31:17,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-11-09 05:31:17,258 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 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 650 [2024-11-09 05:31:17,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:31:17,260 INFO L225 Difference]: With dead ends: 711 [2024-11-09 05:31:17,260 INFO L226 Difference]: Without dead ends: 711 [2024-11-09 05:31:17,263 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2049 GetRequests, 1889 SyntacticMatches, 34 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6068 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2705, Invalid=13551, Unknown=0, NotChecked=0, Total=16256 [2024-11-09 05:31:17,263 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2837 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:31:17,264 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 2847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2837 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-09 05:31:17,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2024-11-09 05:31:17,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 711. [2024-11-09 05:31:17,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 1.0408450704225352) internal successors, (739), 710 states have internal predecessors, (739), 0 states have call successors, (0), 0 states 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 05:31:17,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 739 transitions. [2024-11-09 05:31:17,274 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 739 transitions. Word has length 650 [2024-11-09 05:31:17,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:31:17,275 INFO L471 AbstractCegarLoop]: Abstraction has 711 states and 739 transitions. [2024-11-09 05:31:17,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 0 states 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 05:31:17,276 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 739 transitions. [2024-11-09 05:31:17,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 671 [2024-11-09 05:31:17,281 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:31:17,281 INFO L215 NwaCegarLoop]: trace histogram [148, 148, 148, 147, 16, 16, 15, 15, 15, 1, 1] [2024-11-09 05:31:17,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-09 05:31:17,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-09 05:31:17,482 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:31:17,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:31:17,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1484677084, now seen corresponding path program 11 times [2024-11-09 05:31:17,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:31:17,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040421005] [2024-11-09 05:31:17,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:31:17,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:31:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:31:20,055 INFO L134 CoverageAnalysis]: Checked inductivity of 46287 backedges. 26102 proven. 816 refuted. 0 times theorem prover too weak. 19369 trivial. 0 not checked. [2024-11-09 05:31:20,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:31:20,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040421005] [2024-11-09 05:31:20,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040421005] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:31:20,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593485825] [2024-11-09 05:31:20,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:31:20,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:31:20,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:31:20,056 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:31:20,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-09 05:31:20,709 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-09 05:31:20,710 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:31:20,716 INFO L255 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-09 05:31:20,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:31:20,735 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 05:31:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 46287 backedges. 11287 proven. 12878 refuted. 0 times theorem prover too weak. 22122 trivial. 0 not checked. [2024-11-09 05:31:24,398 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:31:28,935 INFO L134 CoverageAnalysis]: Checked inductivity of 46287 backedges. 0 proven. 24165 refuted. 0 times theorem prover too weak. 22122 trivial. 0 not checked. [2024-11-09 05:31:28,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593485825] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:31:28,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [320679314] [2024-11-09 05:31:28,937 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:31:28,937 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:31:28,937 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:31:28,938 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:31:28,938 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:31:29,686 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:31:30,826 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '47015#(exists ((|v_ULTIMATE.start_foo_~b#1.offset_348| Int) (|v_ULTIMATE.start_foo_~b#1.base_349| Int) (|v_ULTIMATE.start_foo_~i~0#1_1659| Int)) (and (<= (mod |v_ULTIMATE.start_foo_~i~0#1_1659| 4294967296) 32) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_1659|) (<= |v_ULTIMATE.start_foo_~i~0#1_1659| (+ |ULTIMATE.start_foo_~size#1| 1)) (or (< (+ |v_ULTIMATE.start_foo_~b#1.offset_348| |v_ULTIMATE.start_foo_~i~0#1_1659|) 0) (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_349|) (+ |v_ULTIMATE.start_foo_~b#1.offset_348| |v_ULTIMATE.start_foo_~i~0#1_1659| 1)))))' at error location [2024-11-09 05:31:30,826 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:31:30,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:31:30,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 19, 19] total 66 [2024-11-09 05:31:30,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008586939] [2024-11-09 05:31:30,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:31:30,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-09 05:31:30,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:31:30,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-09 05:31:30,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=739, Invalid=4517, Unknown=0, NotChecked=0, Total=5256 [2024-11-09 05:31:30,831 INFO L87 Difference]: Start difference. First operand 711 states and 739 transitions. Second operand has 66 states, 66 states have (on average 4.106060606060606) internal successors, (271), 66 states have internal predecessors, (271), 0 states have call successors, (0), 0 states 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 05:31:49,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:31:49,019 INFO L93 Difference]: Finished difference Result 1377 states and 1465 transitions. [2024-11-09 05:31:49,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2024-11-09 05:31:49,019 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 4.106060606060606) internal successors, (271), 66 states have internal predecessors, (271), 0 states have call successors, (0), 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 670 [2024-11-09 05:31:49,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:31:49,023 INFO L225 Difference]: With dead ends: 1377 [2024-11-09 05:31:49,023 INFO L226 Difference]: Without dead ends: 1377 [2024-11-09 05:31:49,030 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2229 GetRequests, 1950 SyntacticMatches, 15 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24370 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=11415, Invalid=59075, Unknown=0, NotChecked=0, Total=70490 [2024-11-09 05:31:49,031 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 1258 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1258 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:31:49,031 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1258 Valid, 0 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 1775 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 05:31:49,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2024-11-09 05:31:49,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1077. [2024-11-09 05:31:49,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1076 states have (on average 1.050185873605948) internal successors, (1130), 1076 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states 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 05:31:49,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 1130 transitions. [2024-11-09 05:31:49,047 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 1130 transitions. Word has length 670 [2024-11-09 05:31:49,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:31:49,048 INFO L471 AbstractCegarLoop]: Abstraction has 1077 states and 1130 transitions. [2024-11-09 05:31:49,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 4.106060606060606) internal successors, (271), 66 states have internal predecessors, (271), 0 states have call successors, (0), 0 states 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 05:31:49,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 1130 transitions. [2024-11-09 05:31:49,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 824 [2024-11-09 05:31:49,056 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:31:49,057 INFO L215 NwaCegarLoop]: trace histogram [185, 185, 185, 184, 17, 17, 16, 16, 16, 1, 1] [2024-11-09 05:31:49,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-09 05:31:49,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-09 05:31:49,257 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:31:49,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:31:49,258 INFO L85 PathProgramCache]: Analyzing trace with hash -351770366, now seen corresponding path program 12 times [2024-11-09 05:31:49,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:31:49,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810225798] [2024-11-09 05:31:49,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:31:49,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:31:49,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:31:52,275 INFO L134 CoverageAnalysis]: Checked inductivity of 71672 backedges. 46194 proven. 2210 refuted. 0 times theorem prover too weak. 23268 trivial. 0 not checked. [2024-11-09 05:31:52,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:31:52,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810225798] [2024-11-09 05:31:52,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810225798] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:31:52,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315507354] [2024-11-09 05:31:52,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:31:52,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:31:52,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:31:52,278 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:31:52,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-09 05:32:01,008 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:32:01,008 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:32:01,032 INFO L255 TraceCheckSpWp]: Trace formula consists of 2754 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-09 05:32:01,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:32:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 71672 backedges. 28327 proven. 36683 refuted. 0 times theorem prover too weak. 6662 trivial. 0 not checked. [2024-11-09 05:32:03,490 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:32:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 71672 backedges. 28327 proven. 36683 refuted. 0 times theorem prover too weak. 6662 trivial. 0 not checked. [2024-11-09 05:32:05,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315507354] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:32:05,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [593330056] [2024-11-09 05:32:05,859 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:32:05,859 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:32:05,860 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:32:05,860 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:32:05,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:32:06,318 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:32:07,688 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '54894#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_foo_~size#1|) (exists ((|v_ULTIMATE.start_foo_~i~0#1_1901| Int) (|v_ULTIMATE.start_foo_~b#1.base_387| Int)) (and (<= 2 |v_ULTIMATE.start_foo_~b#1.base_387|) (<= (mod |v_ULTIMATE.start_foo_~i~0#1_1901| 4294967296) 32) (<= (select |#length| |v_ULTIMATE.start_foo_~b#1.base_387|) |v_ULTIMATE.start_foo_~i~0#1_1901|) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_1901|) (<= |v_ULTIMATE.start_foo_~i~0#1_1901| (+ |ULTIMATE.start_foo_~size#1| 1)))))' at error location [2024-11-09 05:32:07,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:32:07,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:32:07,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 40, 40] total 100 [2024-11-09 05:32:07,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854392037] [2024-11-09 05:32:07,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:32:07,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2024-11-09 05:32:07,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:32:07,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2024-11-09 05:32:07,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1576, Invalid=9980, Unknown=0, NotChecked=0, Total=11556 [2024-11-09 05:32:07,693 INFO L87 Difference]: Start difference. First operand 1077 states and 1130 transitions. Second operand has 100 states, 100 states have (on average 5.12) internal successors, (512), 100 states have internal predecessors, (512), 0 states have call successors, (0), 0 states 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 05:32:26,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:32:26,419 INFO L93 Difference]: Finished difference Result 1568 states and 1661 transitions. [2024-11-09 05:32:26,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 338 states. [2024-11-09 05:32:26,420 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 5.12) internal successors, (512), 100 states have internal predecessors, (512), 0 states have call successors, (0), 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 823 [2024-11-09 05:32:26,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:32:26,425 INFO L225 Difference]: With dead ends: 1568 [2024-11-09 05:32:26,425 INFO L226 Difference]: Without dead ends: 1568 [2024-11-09 05:32:26,440 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2821 GetRequests, 2383 SyntacticMatches, 8 SemanticMatches, 430 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68372 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=19605, Invalid=166587, Unknown=0, NotChecked=0, Total=186192 [2024-11-09 05:32:26,441 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 854 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4871 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 4871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:32:26,441 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [854 Valid, 0 Invalid, 4919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 4871 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-09 05:32:26,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2024-11-09 05:32:26,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1513. [2024-11-09 05:32:26,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 1.062169312169312) internal successors, (1606), 1512 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states 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 05:32:26,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 1606 transitions. [2024-11-09 05:32:26,464 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 1606 transitions. Word has length 823 [2024-11-09 05:32:26,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:32:26,466 INFO L471 AbstractCegarLoop]: Abstraction has 1513 states and 1606 transitions. [2024-11-09 05:32:26,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 5.12) internal successors, (512), 100 states have internal predecessors, (512), 0 states have call successors, (0), 0 states 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 05:32:26,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 1606 transitions. [2024-11-09 05:32:26,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1284 [2024-11-09 05:32:26,484 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:32:26,484 INFO L215 NwaCegarLoop]: trace histogram [290, 290, 290, 289, 25, 25, 24, 24, 24, 1, 1] [2024-11-09 05:32:26,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-09 05:32:26,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:32:26,685 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:32:26,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:32:26,686 INFO L85 PathProgramCache]: Analyzing trace with hash 593575274, now seen corresponding path program 13 times [2024-11-09 05:32:26,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:32:26,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046443345] [2024-11-09 05:32:26,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:32:26,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:32:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:32:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 176008 backedges. 85837 proven. 1114 refuted. 0 times theorem prover too weak. 89057 trivial. 0 not checked. [2024-11-09 05:32:32,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:32:32,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046443345] [2024-11-09 05:32:32,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046443345] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:32:32,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456571889] [2024-11-09 05:32:32,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:32:32,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:32:32,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:32:32,028 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:32:32,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-09 05:32:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:32:33,302 INFO L255 TraceCheckSpWp]: Trace formula consists of 4262 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 05:32:33,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:32:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 176008 backedges. 87405 proven. 4192 refuted. 0 times theorem prover too weak. 84411 trivial. 0 not checked. [2024-11-09 05:32:34,741 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:32:36,129 INFO L134 CoverageAnalysis]: Checked inductivity of 176008 backedges. 87405 proven. 4192 refuted. 0 times theorem prover too weak. 84411 trivial. 0 not checked. [2024-11-09 05:32:36,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456571889] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:32:36,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1610411609] [2024-11-09 05:32:36,130 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:32:36,130 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:32:36,131 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:32:36,131 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:32:36,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:32:36,968 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:32:38,853 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '66391#(exists ((|v_ULTIMATE.start_foo_~b#1.offset_437| Int) (|v_ULTIMATE.start_foo_~b#1.base_438| Int) (|v_ULTIMATE.start_foo_~i~0#1_2243| Int)) (and (<= (mod |v_ULTIMATE.start_foo_~i~0#1_2243| 4294967296) 32) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_2243|) (<= |v_ULTIMATE.start_foo_~i~0#1_2243| (+ |ULTIMATE.start_foo_~size#1| 1)) (or (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_438|) (+ |v_ULTIMATE.start_foo_~b#1.offset_437| |v_ULTIMATE.start_foo_~i~0#1_2243| 1)) (< (+ |v_ULTIMATE.start_foo_~b#1.offset_437| |v_ULTIMATE.start_foo_~i~0#1_2243|) 0))))' at error location [2024-11-09 05:32:38,853 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:32:38,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:32:38,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 26] total 68 [2024-11-09 05:32:38,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156163095] [2024-11-09 05:32:38,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:32:38,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-09 05:32:38,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:32:38,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-09 05:32:38,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=4764, Unknown=0, NotChecked=0, Total=5550 [2024-11-09 05:32:38,859 INFO L87 Difference]: Start difference. First operand 1513 states and 1606 transitions. Second operand has 68 states, 68 states have (on average 4.882352941176471) internal successors, (332), 68 states have internal predecessors, (332), 0 states have call successors, (0), 0 states 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 05:32:48,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:32:48,806 INFO L93 Difference]: Finished difference Result 1513 states and 1592 transitions. [2024-11-09 05:32:48,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2024-11-09 05:32:48,807 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 4.882352941176471) internal successors, (332), 68 states have internal predecessors, (332), 0 states have call successors, (0), 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 1283 [2024-11-09 05:32:48,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:32:48,812 INFO L225 Difference]: With dead ends: 1513 [2024-11-09 05:32:48,812 INFO L226 Difference]: Without dead ends: 1513 [2024-11-09 05:32:48,815 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3995 GetRequests, 3769 SyntacticMatches, 36 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11760 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=6462, Invalid=30210, Unknown=0, NotChecked=0, Total=36672 [2024-11-09 05:32:48,816 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 92 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6066 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 6066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:32:48,816 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 0 Invalid, 6087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 6066 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-09 05:32:48,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2024-11-09 05:32:48,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1513. [2024-11-09 05:32:48,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 1.052910052910053) internal successors, (1592), 1512 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states 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 05:32:48,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 1592 transitions. [2024-11-09 05:32:48,840 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 1592 transitions. Word has length 1283 [2024-11-09 05:32:48,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:32:48,841 INFO L471 AbstractCegarLoop]: Abstraction has 1513 states and 1592 transitions. [2024-11-09 05:32:48,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 4.882352941176471) internal successors, (332), 68 states have internal predecessors, (332), 0 states have call successors, (0), 0 states 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 05:32:48,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 1592 transitions. [2024-11-09 05:32:48,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1328 [2024-11-09 05:32:48,861 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:32:48,862 INFO L215 NwaCegarLoop]: trace histogram [301, 301, 301, 300, 25, 25, 24, 24, 24, 1, 1] [2024-11-09 05:32:48,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-11-09 05:32:49,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:32:49,066 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:32:49,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:32:49,066 INFO L85 PathProgramCache]: Analyzing trace with hash 740031698, now seen corresponding path program 14 times [2024-11-09 05:32:49,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:32:49,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220819288] [2024-11-09 05:32:49,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:32:49,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:32:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:32:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 189252 backedges. 91638 proven. 1285 refuted. 0 times theorem prover too weak. 96329 trivial. 0 not checked. [2024-11-09 05:32:55,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:32:55,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220819288] [2024-11-09 05:32:55,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220819288] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:32:55,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134306417] [2024-11-09 05:32:55,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:32:55,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:32:55,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:32:55,070 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:32:55,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-09 05:32:57,850 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2024-11-09 05:32:57,850 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:32:57,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 1431 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-09 05:32:57,878 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:32:57,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-09 05:33:05,852 INFO L134 CoverageAnalysis]: Checked inductivity of 189252 backedges. 0 proven. 27140 refuted. 0 times theorem prover too weak. 162112 trivial. 0 not checked. [2024-11-09 05:33:05,852 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:33:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 189252 backedges. 0 proven. 27140 refuted. 0 times theorem prover too weak. 162112 trivial. 0 not checked. [2024-11-09 05:33:15,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134306417] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:33:15,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1653853842] [2024-11-09 05:33:15,740 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:33:15,740 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:33:15,741 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:33:15,741 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:33:15,741 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:33:16,548 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:33:18,541 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '77695#(exists ((|v_ULTIMATE.start_foo_~i~0#1_2614| Int) (|v_ULTIMATE.start_foo_~b#1.base_491| Int) (|v_ULTIMATE.start_foo_~b#1.offset_490| Int)) (and (<= (mod |v_ULTIMATE.start_foo_~i~0#1_2614| 4294967296) 32) (or (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_491|) (+ |v_ULTIMATE.start_foo_~b#1.offset_490| |v_ULTIMATE.start_foo_~i~0#1_2614| 1)) (< (+ |v_ULTIMATE.start_foo_~b#1.offset_490| |v_ULTIMATE.start_foo_~i~0#1_2614|) 0)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_2614|) (<= |v_ULTIMATE.start_foo_~i~0#1_2614| (+ |ULTIMATE.start_foo_~size#1| 1))))' at error location [2024-11-09 05:33:18,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:33:18,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:33:18,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 24, 24] total 81 [2024-11-09 05:33:18,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402002222] [2024-11-09 05:33:18,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:33:18,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-11-09 05:33:18,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:33:18,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-11-09 05:33:18,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1251, Invalid=6405, Unknown=0, NotChecked=0, Total=7656 [2024-11-09 05:33:18,545 INFO L87 Difference]: Start difference. First operand 1513 states and 1592 transitions. Second operand has 81 states, 81 states have (on average 4.2592592592592595) internal successors, (345), 81 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:33:24,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:33:24,787 INFO L93 Difference]: Finished difference Result 1670 states and 1760 transitions. [2024-11-09 05:33:24,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2024-11-09 05:33:24,788 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 4.2592592592592595) internal successors, (345), 81 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1327 [2024-11-09 05:33:24,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:33:24,791 INFO L225 Difference]: With dead ends: 1670 [2024-11-09 05:33:24,791 INFO L226 Difference]: Without dead ends: 1670 [2024-11-09 05:33:24,794 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4094 GetRequests, 3903 SyntacticMatches, 24 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9498 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=5488, Invalid=22904, Unknown=0, NotChecked=0, Total=28392 [2024-11-09 05:33:24,794 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 347 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:33:24,795 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 9 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 05:33:24,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2024-11-09 05:33:24,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1548. [2024-11-09 05:33:24,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1548 states, 1547 states have (on average 1.048480930833872) internal successors, (1622), 1547 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states 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 05:33:24,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 1622 transitions. [2024-11-09 05:33:24,820 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 1622 transitions. Word has length 1327 [2024-11-09 05:33:24,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:33:24,821 INFO L471 AbstractCegarLoop]: Abstraction has 1548 states and 1622 transitions. [2024-11-09 05:33:24,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 4.2592592592592595) internal successors, (345), 81 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:33:24,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 1622 transitions. [2024-11-09 05:33:24,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1404 [2024-11-09 05:33:24,842 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:33:24,843 INFO L215 NwaCegarLoop]: trace histogram [320, 320, 320, 319, 25, 25, 24, 24, 24, 1, 1] [2024-11-09 05:33:24,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-09 05:33:25,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-09 05:33:25,044 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:33:25,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:33:25,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1413669334, now seen corresponding path program 15 times [2024-11-09 05:33:25,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:33:25,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947931571] [2024-11-09 05:33:25,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:25,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:33:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 213268 backedges. 106551 proven. 1468 refuted. 0 times theorem prover too weak. 105249 trivial. 0 not checked. [2024-11-09 05:33:31,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:33:31,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947931571] [2024-11-09 05:33:31,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947931571] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:33:31,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397615293] [2024-11-09 05:33:31,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:33:31,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:33:31,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:33:31,067 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:33:31,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-09 05:33:57,990 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:33:57,990 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:33:58,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 4622 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-09 05:33:58,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:34:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 213268 backedges. 176975 proven. 27214 refuted. 0 times theorem prover too weak. 9079 trivial. 0 not checked. [2024-11-09 05:34:01,453 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:34:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 213268 backedges. 176975 proven. 27214 refuted. 0 times theorem prover too weak. 9079 trivial. 0 not checked. [2024-11-09 05:34:05,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397615293] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:34:05,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [222724543] [2024-11-09 05:34:05,403 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:34:05,403 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:34:05,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:34:05,404 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:34:05,404 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:34:06,047 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:34:08,555 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '89602#(exists ((|v_ULTIMATE.start_foo_~b#1.offset_541| Int) (|v_ULTIMATE.start_foo_~i~0#1_2997| Int) (|v_ULTIMATE.start_foo_~b#1.base_542| Int)) (and (<= |v_ULTIMATE.start_foo_~i~0#1_2997| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_2997|) (or (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_542|) (+ |v_ULTIMATE.start_foo_~b#1.offset_541| |v_ULTIMATE.start_foo_~i~0#1_2997| 1)) (< (+ |v_ULTIMATE.start_foo_~b#1.offset_541| |v_ULTIMATE.start_foo_~i~0#1_2997|) 0)) (<= (mod |v_ULTIMATE.start_foo_~i~0#1_2997| 4294967296) 32)))' at error location [2024-11-09 05:34:08,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:34:08,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:34:08,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 50, 50] total 107 [2024-11-09 05:34:08,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280441272] [2024-11-09 05:34:08,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:34:08,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2024-11-09 05:34:08,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:34:08,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2024-11-09 05:34:08,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1827, Invalid=11055, Unknown=0, NotChecked=0, Total=12882 [2024-11-09 05:34:08,560 INFO L87 Difference]: Start difference. First operand 1548 states and 1622 transitions. Second operand has 107 states, 107 states have (on average 5.093457943925234) internal successors, (545), 107 states have internal predecessors, (545), 0 states have call successors, (0), 0 states 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 05:34:52,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:34:52,880 INFO L93 Difference]: Finished difference Result 1558 states and 1568 transitions. [2024-11-09 05:34:52,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 376 states. [2024-11-09 05:34:52,880 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 5.093457943925234) internal successors, (545), 107 states have internal predecessors, (545), 0 states have call successors, (0), 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 1403 [2024-11-09 05:34:52,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:34:52,883 INFO L225 Difference]: With dead ends: 1558 [2024-11-09 05:34:52,883 INFO L226 Difference]: Without dead ends: 1558 [2024-11-09 05:34:52,893 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4591 GetRequests, 4082 SyntacticMatches, 48 SemanticMatches, 461 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62738 ImplicationChecksByTransitivity, 38.4s TimeCoverageRelationStatistics Valid=38869, Invalid=175037, Unknown=0, NotChecked=0, Total=213906 [2024-11-09 05:34:52,894 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 128 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16862 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 16894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 16862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:34:52,894 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 0 Invalid, 16894 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [32 Valid, 16862 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2024-11-09 05:34:52,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2024-11-09 05:34:52,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1552. [2024-11-09 05:34:52,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 1.0070921985815602) internal successors, (1562), 1551 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states 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 05:34:52,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 1562 transitions. [2024-11-09 05:34:52,912 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 1562 transitions. Word has length 1403 [2024-11-09 05:34:52,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:34:52,913 INFO L471 AbstractCegarLoop]: Abstraction has 1552 states and 1562 transitions. [2024-11-09 05:34:52,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 5.093457943925234) internal successors, (545), 107 states have internal predecessors, (545), 0 states have call successors, (0), 0 states 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 05:34:52,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 1562 transitions. [2024-11-09 05:34:52,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1552 [2024-11-09 05:34:52,933 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:34:52,934 INFO L215 NwaCegarLoop]: trace histogram [357, 357, 357, 356, 25, 25, 24, 24, 24, 1, 1] [2024-11-09 05:34:52,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-09 05:34:53,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-09 05:34:53,135 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:34:53,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:34:53,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1420185294, now seen corresponding path program 16 times [2024-11-09 05:34:53,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:34:53,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082097389] [2024-11-09 05:34:53,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:34:53,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:34:54,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:35:03,604 INFO L134 CoverageAnalysis]: Checked inductivity of 264180 backedges. 2959 proven. 250497 refuted. 0 times theorem prover too weak. 10724 trivial. 0 not checked. [2024-11-09 05:35:03,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:35:03,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082097389] [2024-11-09 05:35:03,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082097389] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:35:03,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122749290] [2024-11-09 05:35:03,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:35:03,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:35:03,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:35:03,606 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:35:03,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-09 05:35:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:35:04,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 5066 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-09 05:35:04,928 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:35:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 264180 backedges. 10926 proven. 242452 refuted. 0 times theorem prover too weak. 10802 trivial. 0 not checked. [2024-11-09 05:35:08,048 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:35:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 264180 backedges. 10926 proven. 242452 refuted. 0 times theorem prover too weak. 10802 trivial. 0 not checked. [2024-11-09 05:35:10,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122749290] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:35:10,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1259645186] [2024-11-09 05:35:10,783 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:35:10,783 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:35:10,783 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:35:10,784 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:35:10,784 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:35:11,339 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:35:13,154 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '102805#(exists ((|v_ULTIMATE.start_foo_~b#1.offset_593| Int) (|v_ULTIMATE.start_foo_~b#1.base_594| Int) (|v_ULTIMATE.start_foo_~i~0#1_3422| Int)) (and (or (< (+ |v_ULTIMATE.start_foo_~b#1.offset_593| |v_ULTIMATE.start_foo_~i~0#1_3422|) 0) (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_594|) (+ |v_ULTIMATE.start_foo_~b#1.offset_593| |v_ULTIMATE.start_foo_~i~0#1_3422| 1))) (<= (mod |v_ULTIMATE.start_foo_~i~0#1_3422| 4294967296) 32) (<= |v_ULTIMATE.start_foo_~i~0#1_3422| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_3422|)))' at error location [2024-11-09 05:35:13,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:35:13,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:35:13,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 53, 53] total 87 [2024-11-09 05:35:13,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083201111] [2024-11-09 05:35:13,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:35:13,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-11-09 05:35:13,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:35:13,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-11-09 05:35:13,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1780, Invalid=7150, Unknown=0, NotChecked=0, Total=8930 [2024-11-09 05:35:13,157 INFO L87 Difference]: Start difference. First operand 1552 states and 1562 transitions. Second operand has 88 states, 88 states have (on average 5.284090909090909) internal successors, (465), 87 states have internal predecessors, (465), 0 states have call successors, (0), 0 states 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 05:35:28,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:35:28,182 INFO L93 Difference]: Finished difference Result 1663 states and 1672 transitions. [2024-11-09 05:35:28,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 402 states. [2024-11-09 05:35:28,183 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 5.284090909090909) internal successors, (465), 87 states have internal predecessors, (465), 0 states have call successors, (0), 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 1551 [2024-11-09 05:35:28,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:35:28,188 INFO L225 Difference]: With dead ends: 1663 [2024-11-09 05:35:28,189 INFO L226 Difference]: Without dead ends: 1663 [2024-11-09 05:35:28,209 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5085 GetRequests, 4542 SyntacticMatches, 75 SemanticMatches, 468 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104351 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=40680, Invalid=179750, Unknown=0, NotChecked=0, Total=220430 [2024-11-09 05:35:28,210 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 11 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4027 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 4100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 4027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:35:28,210 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 11 Invalid, 4100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 4027 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-09 05:35:28,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2024-11-09 05:35:28,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1661. [2024-11-09 05:35:28,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 1.0060240963855422) internal successors, (1670), 1660 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states 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 05:35:28,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 1670 transitions. [2024-11-09 05:35:28,228 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 1670 transitions. Word has length 1551 [2024-11-09 05:35:28,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:35:28,229 INFO L471 AbstractCegarLoop]: Abstraction has 1661 states and 1670 transitions. [2024-11-09 05:35:28,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 5.284090909090909) internal successors, (465), 87 states have internal predecessors, (465), 0 states have call successors, (0), 0 states 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 05:35:28,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 1670 transitions. [2024-11-09 05:35:28,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1657 [2024-11-09 05:35:28,253 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:35:28,253 INFO L215 NwaCegarLoop]: trace histogram [382, 382, 382, 381, 26, 26, 25, 25, 25, 1, 1] [2024-11-09 05:35:28,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-09 05:35:28,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:35:28,454 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:35:28,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:35:28,455 INFO L85 PathProgramCache]: Analyzing trace with hash 687959460, now seen corresponding path program 17 times [2024-11-09 05:35:28,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:35:28,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550278796] [2024-11-09 05:35:28,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:35:28,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:35:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:35:38,012 INFO L134 CoverageAnalysis]: Checked inductivity of 302184 backedges. 251714 proven. 37634 refuted. 0 times theorem prover too weak. 12836 trivial. 0 not checked. [2024-11-09 05:35:38,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:35:38,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550278796] [2024-11-09 05:35:38,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550278796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:35:38,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432310125] [2024-11-09 05:35:38,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:35:38,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:35:38,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:35:38,014 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:35:38,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-09 05:35:41,671 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2024-11-09 05:35:41,672 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:35:41,685 INFO L255 TraceCheckSpWp]: Trace formula consists of 1767 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-09 05:35:41,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:35:41,704 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 05:35:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 302184 backedges. 33478 proven. 48214 refuted. 0 times theorem prover too weak. 220492 trivial. 0 not checked. [2024-11-09 05:35:50,102 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:36:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 302184 backedges. 0 proven. 81692 refuted. 0 times theorem prover too weak. 220492 trivial. 0 not checked. [2024-11-09 05:36:01,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432310125] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:36:01,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1788764364] [2024-11-09 05:36:01,258 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:36:01,258 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:36:01,258 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:36:01,259 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:36:01,259 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:36:01,918 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:36:03,739 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '116933#(exists ((|v_ULTIMATE.start_foo_~b#1.offset_646| Int) (|v_ULTIMATE.start_foo_~b#1.base_647| Int) (|v_ULTIMATE.start_foo_~i~0#1_3871| Int)) (and (or (< (+ |v_ULTIMATE.start_foo_~b#1.offset_646| |v_ULTIMATE.start_foo_~i~0#1_3871|) 0) (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_647|) (+ |v_ULTIMATE.start_foo_~b#1.offset_646| |v_ULTIMATE.start_foo_~i~0#1_3871| 1))) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_3871|) (<= (mod |v_ULTIMATE.start_foo_~i~0#1_3871| 4294967296) 32) (<= |v_ULTIMATE.start_foo_~i~0#1_3871| (+ |ULTIMATE.start_foo_~size#1| 1))))' at error location [2024-11-09 05:36:03,740 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:36:03,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:36:03,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 32, 32] total 116 [2024-11-09 05:36:03,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495102447] [2024-11-09 05:36:03,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:36:03,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2024-11-09 05:36:03,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:36:03,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2024-11-09 05:36:03,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2497, Invalid=12755, Unknown=0, NotChecked=0, Total=15252 [2024-11-09 05:36:03,744 INFO L87 Difference]: Start difference. First operand 1661 states and 1670 transitions. Second operand has 117 states, 117 states have (on average 4.948717948717949) internal successors, (579), 116 states have internal predecessors, (579), 0 states have call successors, (0), 0 states 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 05:36:57,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:36:57,919 INFO L93 Difference]: Finished difference Result 1935 states and 1956 transitions. [2024-11-09 05:36:57,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 557 states. [2024-11-09 05:36:57,920 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 4.948717948717949) internal successors, (579), 116 states have internal predecessors, (579), 0 states have call successors, (0), 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 1656 [2024-11-09 05:36:57,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:36:57,924 INFO L225 Difference]: With dead ends: 1935 [2024-11-09 05:36:57,924 INFO L226 Difference]: Without dead ends: 1935 [2024-11-09 05:36:57,941 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5573 GetRequests, 4871 SyntacticMatches, 25 SemanticMatches, 677 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160724 ImplicationChecksByTransitivity, 53.8s TimeCoverageRelationStatistics Valid=80950, Invalid=379412, Unknown=0, NotChecked=0, Total=460362 [2024-11-09 05:36:57,942 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 1131 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 7672 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1131 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 7845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 7672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-09 05:36:57,942 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1131 Valid, 1 Invalid, 7845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 7672 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-09 05:36:57,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2024-11-09 05:36:57,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1903. [2024-11-09 05:36:57,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1902 states have (on average 1.0084121976866456) internal successors, (1918), 1902 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states 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 05:36:57,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 1918 transitions. [2024-11-09 05:36:57,960 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 1918 transitions. Word has length 1656 [2024-11-09 05:36:57,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:36:57,961 INFO L471 AbstractCegarLoop]: Abstraction has 1903 states and 1918 transitions. [2024-11-09 05:36:57,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 4.948717948717949) internal successors, (579), 116 states have internal predecessors, (579), 0 states have call successors, (0), 0 states 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 05:36:57,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 1918 transitions. [2024-11-09 05:36:57,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1903 [2024-11-09 05:36:57,991 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:36:57,991 INFO L215 NwaCegarLoop]: trace histogram [441, 441, 441, 440, 28, 28, 27, 27, 27, 1, 1] [2024-11-09 05:36:58,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-09 05:36:58,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-09 05:36:58,192 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:36:58,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:36:58,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1540760004, now seen corresponding path program 18 times [2024-11-09 05:36:58,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:36:58,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998031545] [2024-11-09 05:36:58,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:58,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:36:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:37:09,451 INFO L134 CoverageAnalysis]: Checked inductivity of 401796 backedges. 339304 proven. 42053 refuted. 0 times theorem prover too weak. 20439 trivial. 0 not checked. [2024-11-09 05:37:09,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:37:09,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998031545] [2024-11-09 05:37:09,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998031545] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:37:09,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704976034] [2024-11-09 05:37:09,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:37:09,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:37:09,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:37:09,453 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:37:09,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-09 05:40:03,532 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:40:03,532 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:40:03,611 INFO L255 TraceCheckSpWp]: Trace formula consists of 6167 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-09 05:40:03,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:40:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 401796 backedges. 342606 proven. 38751 refuted. 0 times theorem prover too weak. 20439 trivial. 0 not checked. [2024-11-09 05:40:06,623 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:40:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 401796 backedges. 342606 proven. 38751 refuted. 0 times theorem prover too weak. 20439 trivial. 0 not checked. [2024-11-09 05:40:09,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704976034] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:40:09,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [456417968] [2024-11-09 05:40:09,835 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:40:09,835 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:40:09,835 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:40:09,835 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:40:09,836 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:40:10,547 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:40:13,184 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '133378#(exists ((|v_ULTIMATE.start_foo_~i~0#1_4380| Int) (|v_ULTIMATE.start_foo_~b#1.base_704| Int) (|v_ULTIMATE.start_foo_~b#1.offset_703| Int)) (and (<= (mod |v_ULTIMATE.start_foo_~i~0#1_4380| 4294967296) 32) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_4380|) (or (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_704|) (+ |v_ULTIMATE.start_foo_~b#1.offset_703| |v_ULTIMATE.start_foo_~i~0#1_4380| 1)) (< (+ |v_ULTIMATE.start_foo_~b#1.offset_703| |v_ULTIMATE.start_foo_~i~0#1_4380|) 0)) (<= |v_ULTIMATE.start_foo_~i~0#1_4380| (+ |ULTIMATE.start_foo_~size#1| 1))))' at error location [2024-11-09 05:40:13,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:40:13,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:40:13,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 83 [2024-11-09 05:40:13,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696404123] [2024-11-09 05:40:13,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:40:13,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-11-09 05:40:13,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:40:13,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-11-09 05:40:13,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1678, Invalid=6512, Unknown=0, NotChecked=0, Total=8190 [2024-11-09 05:40:13,189 INFO L87 Difference]: Start difference. First operand 1903 states and 1918 transitions. Second operand has 84 states, 84 states have (on average 5.523809523809524) internal successors, (464), 83 states have internal predecessors, (464), 0 states have call successors, (0), 0 states 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 05:40:33,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:40:33,107 INFO L93 Difference]: Finished difference Result 1910 states and 1923 transitions. [2024-11-09 05:40:33,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 406 states. [2024-11-09 05:40:33,108 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 5.523809523809524) internal successors, (464), 83 states have internal predecessors, (464), 0 states have call successors, (0), 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 1902 [2024-11-09 05:40:33,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:40:33,112 INFO L225 Difference]: With dead ends: 1910 [2024-11-09 05:40:33,112 INFO L226 Difference]: Without dead ends: 1910 [2024-11-09 05:40:33,121 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6136 GetRequests, 5591 SyntacticMatches, 78 SemanticMatches, 467 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85086 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=62804, Invalid=156688, Unknown=0, NotChecked=0, Total=219492 [2024-11-09 05:40:33,122 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 128 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 3926 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 3953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 3926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:40:33,122 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 150 Invalid, 3953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 3926 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-09 05:40:33,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2024-11-09 05:40:33,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 1907. [2024-11-09 05:40:33,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1907 states, 1906 states have (on average 1.0073452256033577) internal successors, (1920), 1906 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states 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 05:40:33,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 1920 transitions. [2024-11-09 05:40:33,141 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 1920 transitions. Word has length 1902 [2024-11-09 05:40:33,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:40:33,142 INFO L471 AbstractCegarLoop]: Abstraction has 1907 states and 1920 transitions. [2024-11-09 05:40:33,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 5.523809523809524) internal successors, (464), 83 states have internal predecessors, (464), 0 states have call successors, (0), 0 states 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 05:40:33,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 1920 transitions. [2024-11-09 05:40:33,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1907 [2024-11-09 05:40:33,176 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:40:33,177 INFO L215 NwaCegarLoop]: trace histogram [442, 442, 442, 441, 28, 28, 27, 27, 27, 1, 1] [2024-11-09 05:40:33,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-11-09 05:40:33,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-09 05:40:33,378 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:40:33,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:40:33,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1709790764, now seen corresponding path program 19 times [2024-11-09 05:40:33,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:40:33,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809953317] [2024-11-09 05:40:33,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:40:33,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:40:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:40:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 403587 backedges. 5311 proven. 384694 refuted. 0 times theorem prover too weak. 13582 trivial. 0 not checked. [2024-11-09 05:40:55,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:40:55,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809953317] [2024-11-09 05:40:55,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809953317] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:40:55,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914628230] [2024-11-09 05:40:55,239 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:40:55,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:40:55,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:40:55,240 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:40:55,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-09 05:40:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:40:56,908 INFO L255 TraceCheckSpWp]: Trace formula consists of 6179 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-09 05:40:56,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:41:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 403587 backedges. 62585 proven. 324857 refuted. 0 times theorem prover too weak. 16145 trivial. 0 not checked. [2024-11-09 05:41:00,871 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:41:04,328 INFO L134 CoverageAnalysis]: Checked inductivity of 403587 backedges. 62585 proven. 324857 refuted. 0 times theorem prover too weak. 16145 trivial. 0 not checked. [2024-11-09 05:41:04,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914628230] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:41:04,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1970282217] [2024-11-09 05:41:04,329 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:41:04,329 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:41:04,329 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:41:04,330 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:41:04,330 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:41:04,824 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:41:07,475 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '149515#(exists ((|v_ULTIMATE.start_foo_~b#1.offset_761| Int) (|v_ULTIMATE.start_foo_~b#1.base_762| Int) (|v_ULTIMATE.start_foo_~i~0#1_4896| Int)) (and (<= |v_ULTIMATE.start_foo_~i~0#1_4896| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= (mod |v_ULTIMATE.start_foo_~i~0#1_4896| 4294967296) 32) (or (< (+ |v_ULTIMATE.start_foo_~b#1.offset_761| |v_ULTIMATE.start_foo_~i~0#1_4896|) 0) (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_762|) (+ |v_ULTIMATE.start_foo_~b#1.offset_761| |v_ULTIMATE.start_foo_~i~0#1_4896| 1))) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_4896|)))' at error location [2024-11-09 05:41:07,475 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:41:07,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:41:07,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 57, 57] total 126 [2024-11-09 05:41:07,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621110909] [2024-11-09 05:41:07,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:41:07,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2024-11-09 05:41:07,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:41:07,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2024-11-09 05:41:07,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2594, Invalid=15228, Unknown=0, NotChecked=0, Total=17822 [2024-11-09 05:41:07,481 INFO L87 Difference]: Start difference. First operand 1907 states and 1920 transitions. Second operand has 127 states, 127 states have (on average 4.9921259842519685) internal successors, (634), 126 states have internal predecessors, (634), 0 states have call successors, (0), 0 states 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 05:41:29,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:41:29,624 INFO L93 Difference]: Finished difference Result 2026 states and 2039 transitions. [2024-11-09 05:41:29,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 461 states. [2024-11-09 05:41:29,625 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 4.9921259842519685) internal successors, (634), 126 states have internal predecessors, (634), 0 states have call successors, (0), 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 1906 [2024-11-09 05:41:29,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:41:29,630 INFO L225 Difference]: With dead ends: 2026 [2024-11-09 05:41:29,630 INFO L226 Difference]: Without dead ends: 2026 [2024-11-09 05:41:29,643 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6243 GetRequests, 5600 SyntacticMatches, 79 SemanticMatches, 564 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144512 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=63234, Invalid=256556, Unknown=0, NotChecked=0, Total=319790 [2024-11-09 05:41:29,644 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 113 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 6693 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 6819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 6693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:41:29,644 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 10 Invalid, 6819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 6693 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-09 05:41:29,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2024-11-09 05:41:29,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 2024. [2024-11-09 05:41:29,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 1.0069204152249136) internal successors, (2037), 2023 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states 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 05:41:29,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 2037 transitions. [2024-11-09 05:41:29,664 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 2037 transitions. Word has length 1906 [2024-11-09 05:41:29,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:41:29,666 INFO L471 AbstractCegarLoop]: Abstraction has 2024 states and 2037 transitions. [2024-11-09 05:41:29,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 4.9921259842519685) internal successors, (634), 126 states have internal predecessors, (634), 0 states have call successors, (0), 0 states 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 05:41:29,666 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 2037 transitions. [2024-11-09 05:41:29,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2020 [2024-11-09 05:41:29,697 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:41:29,698 INFO L215 NwaCegarLoop]: trace histogram [469, 469, 469, 468, 29, 29, 28, 28, 28, 1, 1] [2024-11-09 05:41:29,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-09 05:41:29,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-09 05:41:29,899 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-09 05:41:29,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:41:29,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1171032610, now seen corresponding path program 20 times [2024-11-09 05:41:29,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:41:29,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826964984] [2024-11-09 05:41:29,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:41:29,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:41:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:41:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 454062 backedges. 386913 proven. 45279 refuted. 0 times theorem prover too weak. 21870 trivial. 0 not checked. [2024-11-09 05:41:43,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:41:43,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826964984] [2024-11-09 05:41:43,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826964984] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:41:43,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196123401] [2024-11-09 05:41:43,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:41:43,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:41:43,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:41:43,248 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:41:43,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09df2fc5-2ca0-4b69-a9d0-a44c46a66157/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-09 05:41:51,676 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2024-11-09 05:41:51,676 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:41:51,703 INFO L255 TraceCheckSpWp]: Trace formula consists of 2347 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-09 05:41:51,720 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:41:51,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1