./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/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_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/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_9b44e200-27b4-4135-9800-e609f4f028dd/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 13ad8bc9cfa3954c0bae4db0509cb11733a45600a9e4ff56ca5bdd4aceeb1fc0 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 06:35:03,514 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 06:35:03,589 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-09 06:35:03,595 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 06:35:03,595 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 06:35:03,624 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 06:35:03,625 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 06:35:03,626 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 06:35:03,627 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 06:35:03,627 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 06:35:03,628 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 06:35:03,628 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 06:35:03,629 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 06:35:03,629 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 06:35:03,630 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 06:35:03,631 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 06:35:03,631 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 06:35:03,635 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 06:35:03,636 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 06:35:03,636 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 06:35:03,637 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 06:35:03,637 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 06:35:03,638 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 06:35:03,639 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 06:35:03,639 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 06:35:03,640 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 06:35:03,640 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 06:35:03,641 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 06:35:03,641 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 06:35:03,642 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 06:35:03,642 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 06:35:03,643 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 06:35:03,643 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 06:35:03,644 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 06:35:03,644 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 06:35:03,645 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 06:35:03,645 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 06:35:03,646 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 06:35:03,646 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 06:35:03,647 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 06:35:03,647 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 06:35:03,648 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:35:03,652 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 06:35:03,652 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 06:35:03,653 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 06:35:03,653 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 06:35:03,653 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 06:35:03,653 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 06:35:03,654 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 06:35:03,654 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_9b44e200-27b4-4135-9800-e609f4f028dd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13ad8bc9cfa3954c0bae4db0509cb11733a45600a9e4ff56ca5bdd4aceeb1fc0 [2024-11-09 06:35:04,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 06:35:04,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 06:35:04,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 06:35:04,088 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 06:35:04,089 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 06:35:04,090 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c Unable to find full path for "g++" [2024-11-09 06:35:06,570 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 06:35:06,867 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 06:35:06,868 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c [2024-11-09 06:35:06,878 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/data/3831813d9/156a903a0bcb4a7282eac95163d2d388/FLAGabc39153f [2024-11-09 06:35:07,195 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/data/3831813d9/156a903a0bcb4a7282eac95163d2d388 [2024-11-09 06:35:07,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 06:35:07,201 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 06:35:07,203 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 06:35:07,203 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 06:35:07,218 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 06:35:07,219 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:35:07" (1/1) ... [2024-11-09 06:35:07,221 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ac9725e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:07, skipping insertion in model container [2024-11-09 06:35:07,221 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:35:07" (1/1) ... [2024-11-09 06:35:07,262 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 06:35:07,546 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:35:07,557 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 06:35:07,579 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:35:07,603 INFO L204 MainTranslator]: Completed translation [2024-11-09 06:35:07,604 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:07 WrapperNode [2024-11-09 06:35:07,604 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 06:35:07,606 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 06:35:07,606 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 06:35:07,606 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 06:35:07,617 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:07" (1/1) ... [2024-11-09 06:35:07,625 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:07" (1/1) ... [2024-11-09 06:35:07,649 INFO L138 Inliner]: procedures = 9, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 82 [2024-11-09 06:35:07,650 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 06:35:07,651 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 06:35:07,651 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 06:35:07,651 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 06:35:07,664 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:07" (1/1) ... [2024-11-09 06:35:07,664 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:07" (1/1) ... [2024-11-09 06:35:07,667 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:07" (1/1) ... [2024-11-09 06:35:07,667 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:07" (1/1) ... [2024-11-09 06:35:07,675 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:07" (1/1) ... [2024-11-09 06:35:07,680 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:07" (1/1) ... [2024-11-09 06:35:07,682 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:07" (1/1) ... [2024-11-09 06:35:07,684 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:07" (1/1) ... [2024-11-09 06:35:07,687 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 06:35:07,688 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 06:35:07,689 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 06:35:07,689 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 06:35:07,690 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:07" (1/1) ... [2024-11-09 06:35:07,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:35:07,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:07,735 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 06:35:07,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 06:35:07,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 06:35:07,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 06:35:07,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 06:35:07,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 06:35:07,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 06:35:07,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 06:35:07,917 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 06:35:07,920 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 06:35:08,393 INFO L? ?]: Removed 49 outVars from TransFormulas that were not future-live. [2024-11-09 06:35:08,393 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 06:35:08,497 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 06:35:08,500 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 06:35:08,501 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:35:08 BoogieIcfgContainer [2024-11-09 06:35:08,501 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 06:35:08,507 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 06:35:08,509 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 06:35:08,514 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 06:35:08,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:35:07" (1/3) ... [2024-11-09 06:35:08,517 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66dc9739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:35:08, skipping insertion in model container [2024-11-09 06:35:08,518 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:07" (2/3) ... [2024-11-09 06:35:08,519 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66dc9739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:35:08, skipping insertion in model container [2024-11-09 06:35:08,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:35:08" (3/3) ... [2024-11-09 06:35:08,524 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2.c [2024-11-09 06:35:08,551 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 06:35:08,551 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2024-11-09 06:35:08,635 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:35:08,646 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;@2169ac14, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:35:08,647 INFO L334 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-11-09 06:35:08,654 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 2.0) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:35:08,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 06:35:08,665 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:08,666 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 06:35:08,667 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:35:08,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:08,675 INFO L85 PathProgramCache]: Analyzing trace with hash -681810386, now seen corresponding path program 1 times [2024-11-09 06:35:08,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:08,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750264337] [2024-11-09 06:35:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:08,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:09,162 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 06:35:09,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:09,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750264337] [2024-11-09 06:35:09,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750264337] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:35:09,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:35:09,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:35:09,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918631745] [2024-11-09 06:35:09,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:35:09,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:35:09,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:09,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:35:09,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:35:09,222 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 2.0) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 06:35:09,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:09,407 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2024-11-09 06:35:09,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:35:09,413 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 06:35:09,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:09,425 INFO L225 Difference]: With dead ends: 43 [2024-11-09 06:35:09,425 INFO L226 Difference]: Without dead ends: 42 [2024-11-09 06:35:09,427 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 06:35:09,433 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:09,435 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 52 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:35:09,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-09 06:35:09,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2024-11-09 06:35:09,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:35:09,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2024-11-09 06:35:09,503 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 6 [2024-11-09 06:35:09,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:09,505 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2024-11-09 06:35:09,505 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 06:35:09,506 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2024-11-09 06:35:09,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-09 06:35:09,506 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:09,507 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:09,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 06:35:09,508 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:35:09,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:09,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1923486112, now seen corresponding path program 1 times [2024-11-09 06:35:09,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:09,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454946205] [2024-11-09 06:35:09,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:09,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:09,817 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 06:35:09,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:09,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454946205] [2024-11-09 06:35:09,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454946205] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:35:09,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:35:09,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 06:35:09,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354655737] [2024-11-09 06:35:09,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:35:09,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:35:09,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:09,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:35:09,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:35:09,826 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:35:10,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:10,020 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2024-11-09 06:35:10,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:35:10,021 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-09 06:35:10,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:10,022 INFO L225 Difference]: With dead ends: 38 [2024-11-09 06:35:10,022 INFO L226 Difference]: Without dead ends: 38 [2024-11-09 06:35:10,022 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-09 06:35:10,024 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 13 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:10,025 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 69 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:35:10,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-09 06:35:10,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2024-11-09 06:35:10,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 34 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 06:35:10,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2024-11-09 06:35:10,033 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 8 [2024-11-09 06:35:10,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:10,034 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2024-11-09 06:35:10,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:35:10,036 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2024-11-09 06:35:10,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-09 06:35:10,037 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:10,037 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:10,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 06:35:10,038 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:35:10,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:10,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1923498622, now seen corresponding path program 1 times [2024-11-09 06:35:10,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:10,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877487623] [2024-11-09 06:35:10,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:10,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:10,335 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 06:35:10,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:10,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877487623] [2024-11-09 06:35:10,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877487623] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:35:10,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:35:10,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:35:10,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253994175] [2024-11-09 06:35:10,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:35:10,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:35:10,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:10,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:35:10,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:35:10,340 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:35:10,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:10,408 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2024-11-09 06:35:10,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:35:10,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-09 06:35:10,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:10,410 INFO L225 Difference]: With dead ends: 39 [2024-11-09 06:35:10,410 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 06:35:10,411 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:35:10,412 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:10,413 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 35 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:35:10,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 06:35:10,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2024-11-09 06:35:10,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.625) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:35:10,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2024-11-09 06:35:10,419 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 8 [2024-11-09 06:35:10,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:10,419 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2024-11-09 06:35:10,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:35:10,420 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2024-11-09 06:35:10,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-09 06:35:10,420 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:10,420 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:10,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 06:35:10,421 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:35:10,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:10,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1923498623, now seen corresponding path program 1 times [2024-11-09 06:35:10,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:10,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813256321] [2024-11-09 06:35:10,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:10,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:10,729 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 06:35:10,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:10,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813256321] [2024-11-09 06:35:10,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813256321] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:35:10,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:35:10,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:35:10,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923568922] [2024-11-09 06:35:10,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:35:10,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:35:10,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:10,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:35:10,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:35:10,733 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:35:10,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:10,873 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2024-11-09 06:35:10,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:35:10,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-09 06:35:10,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:10,876 INFO L225 Difference]: With dead ends: 35 [2024-11-09 06:35:10,876 INFO L226 Difference]: Without dead ends: 35 [2024-11-09 06:35:10,877 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:35:10,878 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:10,882 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 47 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:35:10,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-09 06:35:10,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-09 06:35:10,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 34 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 06:35:10,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2024-11-09 06:35:10,893 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 8 [2024-11-09 06:35:10,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:10,894 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2024-11-09 06:35:10,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:35:10,895 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2024-11-09 06:35:10,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 06:35:10,895 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:10,895 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:10,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 06:35:10,896 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:35:10,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:10,897 INFO L85 PathProgramCache]: Analyzing trace with hash -19110809, now seen corresponding path program 1 times [2024-11-09 06:35:10,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:10,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092651789] [2024-11-09 06:35:10,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:10,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:35:11,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:11,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092651789] [2024-11-09 06:35:11,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092651789] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:35:11,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:35:11,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:35:11,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993665300] [2024-11-09 06:35:11,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:35:11,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:35:11,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:11,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:35:11,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:35:11,094 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:35:11,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:11,166 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2024-11-09 06:35:11,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:35:11,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-09 06:35:11,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:11,168 INFO L225 Difference]: With dead ends: 34 [2024-11-09 06:35:11,168 INFO L226 Difference]: Without dead ends: 34 [2024-11-09 06:35:11,169 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 06:35:11,170 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:11,175 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 28 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:35:11,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-09 06:35:11,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-09 06:35:11,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:35:11,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2024-11-09 06:35:11,185 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 13 [2024-11-09 06:35:11,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:11,186 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2024-11-09 06:35:11,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:35:11,186 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2024-11-09 06:35:11,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 06:35:11,187 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:11,187 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:11,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 06:35:11,189 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:35:11,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:11,191 INFO L85 PathProgramCache]: Analyzing trace with hash -19110808, now seen corresponding path program 1 times [2024-11-09 06:35:11,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:11,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293518629] [2024-11-09 06:35:11,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:11,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:35:11,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:11,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293518629] [2024-11-09 06:35:11,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293518629] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:11,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775270979] [2024-11-09 06:35:11,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:11,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:11,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:11,483 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:11,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 06:35:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:11,617 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 06:35:11,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:11,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:35:11,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 06:35:11,951 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 06:35:11,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 06:35:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:35:12,013 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:12,324 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 52 treesize of output 48 [2024-11-09 06:35:12,360 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:35:12,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2024-11-09 06:35:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:35:12,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775270979] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:12,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [90570917] [2024-11-09 06:35:12,568 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:35:12,569 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:12,575 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:12,586 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:12,587 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:13,575 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:17,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [90570917] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:35:17,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:35:17,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 15 [2024-11-09 06:35:17,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248348876] [2024-11-09 06:35:17,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:35:17,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 06:35:17,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:17,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 06:35:17,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=183, Unknown=1, NotChecked=0, Total=272 [2024-11-09 06:35:17,987 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:35:20,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 06:35:20,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:20,730 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2024-11-09 06:35:20,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 06:35:20,731 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-09 06:35:20,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:20,733 INFO L225 Difference]: With dead ends: 44 [2024-11-09 06:35:20,733 INFO L226 Difference]: Without dead ends: 44 [2024-11-09 06:35:20,737 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=88, Invalid=183, Unknown=1, NotChecked=0, Total=272 [2024-11-09 06:35:20,738 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:20,739 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 37 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 197 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2024-11-09 06:35:20,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-09 06:35:20,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2024-11-09 06:35:20,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.46875) internal successors, (47), 39 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 06:35:20,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2024-11-09 06:35:20,750 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 13 [2024-11-09 06:35:20,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:20,752 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2024-11-09 06:35:20,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:35:20,753 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2024-11-09 06:35:20,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 06:35:20,754 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:20,754 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:20,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 06:35:20,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 06:35:20,956 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:35:20,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:20,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1210957125, now seen corresponding path program 1 times [2024-11-09 06:35:20,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:20,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984342554] [2024-11-09 06:35:20,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:20,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:35:21,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:21,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984342554] [2024-11-09 06:35:21,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984342554] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:21,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338320187] [2024-11-09 06:35:21,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:21,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:21,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:21,200 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:21,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 06:35:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:21,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 06:35:21,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:35:21,411 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:35:21,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338320187] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:21,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1038337944] [2024-11-09 06:35:21,497 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:35:21,497 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:21,498 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:21,498 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:21,499 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:22,663 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:26,183 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '707#(and (exists ((|v_ULTIMATE.start_foo_~b#1.base_20| Int)) (and (<= 2 |v_ULTIMATE.start_foo_~b#1.base_20|) (<= (select |#length| |v_ULTIMATE.start_foo_~b#1.base_20|) 3))) (<= 2 |ULTIMATE.start_foo_~#a~0#1.base|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~i~2#1| 1) (= |ULTIMATE.start_foo_~#a~0#1.offset| 0) (= |ULTIMATE.start_foo_~size#1| 1))' at error location [2024-11-09 06:35:26,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:35:26,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:35:26,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-09 06:35:26,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971709421] [2024-11-09 06:35:26,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:35:26,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 06:35:26,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:26,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 06:35:26,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=261, Unknown=1, NotChecked=0, Total=342 [2024-11-09 06:35:26,187 INFO L87 Difference]: Start difference. First operand 40 states and 47 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 06:35:26,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:26,418 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2024-11-09 06:35:26,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 06:35:26,419 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 17 [2024-11-09 06:35:26,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:26,420 INFO L225 Difference]: With dead ends: 63 [2024-11-09 06:35:26,420 INFO L226 Difference]: Without dead ends: 63 [2024-11-09 06:35:26,420 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=117, Invalid=388, Unknown=1, NotChecked=0, Total=506 [2024-11-09 06:35:26,421 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 79 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:26,422 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 70 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:35:26,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-09 06:35:26,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2024-11-09 06:35:26,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.372093023255814) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:35:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2024-11-09 06:35:26,428 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 17 [2024-11-09 06:35:26,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:26,431 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2024-11-09 06:35:26,431 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 06:35:26,431 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2024-11-09 06:35:26,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 06:35:26,432 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:26,432 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:26,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 06:35:26,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 06:35:26,634 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:35:26,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:26,634 INFO L85 PathProgramCache]: Analyzing trace with hash 219609900, now seen corresponding path program 1 times [2024-11-09 06:35:26,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:26,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577550819] [2024-11-09 06:35:26,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:26,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 06:35:26,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:26,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577550819] [2024-11-09 06:35:26,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577550819] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:35:26,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:35:26,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:35:26,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106878236] [2024-11-09 06:35:26,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:35:26,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:35:26,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:26,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:35:26,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:35:26,720 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 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 06:35:26,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:26,775 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2024-11-09 06:35:26,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:35:26,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 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 19 [2024-11-09 06:35:26,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:26,777 INFO L225 Difference]: With dead ends: 49 [2024-11-09 06:35:26,777 INFO L226 Difference]: Without dead ends: 49 [2024-11-09 06:35:26,778 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 06:35:26,779 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 15 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:26,779 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 44 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:35:26,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-09 06:35:26,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-09 06:35:26,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 48 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 06:35:26,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2024-11-09 06:35:26,790 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 19 [2024-11-09 06:35:26,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:26,790 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2024-11-09 06:35:26,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 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 06:35:26,791 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2024-11-09 06:35:26,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 06:35:26,792 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:26,792 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:26,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 06:35:26,792 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:35:26,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:26,793 INFO L85 PathProgramCache]: Analyzing trace with hash 219609901, now seen corresponding path program 1 times [2024-11-09 06:35:26,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:26,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056797519] [2024-11-09 06:35:26,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:26,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:26,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:27,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:35:27,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:27,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056797519] [2024-11-09 06:35:27,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056797519] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:27,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508547300] [2024-11-09 06:35:27,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:27,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:27,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:27,044 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:27,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 06:35:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:27,159 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 06:35:27,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:27,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:35:27,285 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:27,355 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 22 treesize of output 18 [2024-11-09 06:35:27,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:35:27,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508547300] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:27,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [848891700] [2024-11-09 06:35:27,384 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 06:35:27,384 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:27,384 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:27,385 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:27,385 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:28,249 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:31,632 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1060#(and (= |ULTIMATE.start_foo_~size#1| |ULTIMATE.start_bar_~size#1|) (exists ((|v_ULTIMATE.start_bar_~b#1.offset_25| Int)) (and (<= 2 |ULTIMATE.start_foo_~#a~0#1.base|) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_foo_~b#1.base|) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (or (and (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~2#1| 0) (= |v_ULTIMATE.start_bar_~b#1.offset_25| 0)) (and (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~2#1| 1) (= |v_ULTIMATE.start_bar_~b#1.offset_25| 0))) (= |ULTIMATE.start_foo_~b#1.offset| 0) (<= (select |#length| |ULTIMATE.start_foo_~#a~0#1.base|) (+ |v_ULTIMATE.start_bar_~b#1.offset_25| 3)))) (= |ULTIMATE.start_bar_~res~0#1| 0) (<= 1 |ULTIMATE.start_bar_~size#1|) (<= |ULTIMATE.start_foo_~size#1| |ULTIMATE.start_foo_~i~1#1|))' at error location [2024-11-09 06:35:31,633 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:35:31,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:35:31,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-09 06:35:31,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282073949] [2024-11-09 06:35:31,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:35:31,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 06:35:31,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:31,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 06:35:31,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=292, Unknown=1, NotChecked=0, Total=342 [2024-11-09 06:35:31,635 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 06:35:31,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:31,835 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2024-11-09 06:35:31,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:35:31,836 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-09 06:35:31,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:31,838 INFO L225 Difference]: With dead ends: 58 [2024-11-09 06:35:31,838 INFO L226 Difference]: Without dead ends: 58 [2024-11-09 06:35:31,838 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=54, Invalid=325, Unknown=1, NotChecked=0, Total=380 [2024-11-09 06:35:31,839 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:31,839 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 66 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:35:31,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-09 06:35:31,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2024-11-09 06:35:31,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 54 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 06:35:31,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2024-11-09 06:35:31,846 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 19 [2024-11-09 06:35:31,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:31,846 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2024-11-09 06:35:31,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 06:35:31,847 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2024-11-09 06:35:31,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 06:35:31,847 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:31,848 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:31,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 06:35:32,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:32,049 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:35:32,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:32,050 INFO L85 PathProgramCache]: Analyzing trace with hash 219622411, now seen corresponding path program 1 times [2024-11-09 06:35:32,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:32,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159877561] [2024-11-09 06:35:32,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:32,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:32,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:35:32,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:32,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159877561] [2024-11-09 06:35:32,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159877561] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:32,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801777506] [2024-11-09 06:35:32,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:32,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:32,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:32,267 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:32,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 06:35:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:32,382 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 06:35:32,384 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:32,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:35:32,448 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:35:32,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801777506] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:32,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1759457007] [2024-11-09 06:35:32,514 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:35:32,514 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:32,514 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:32,515 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:32,515 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:33,378 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:36,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1759457007] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:35:36,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:35:36,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 5, 5] total 17 [2024-11-09 06:35:36,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888444398] [2024-11-09 06:35:36,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:35:36,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 06:35:36,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:36,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 06:35:36,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=242, Unknown=1, NotChecked=0, Total=306 [2024-11-09 06:35:36,610 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:35:38,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 06:35:38,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:38,991 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2024-11-09 06:35:38,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 06:35:38,992 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-09 06:35:38,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:38,993 INFO L225 Difference]: With dead ends: 72 [2024-11-09 06:35:38,993 INFO L226 Difference]: Without dead ends: 72 [2024-11-09 06:35:38,993 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=63, Invalid=242, Unknown=1, NotChecked=0, Total=306 [2024-11-09 06:35:38,994 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:38,994 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 21 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2024-11-09 06:35:38,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-09 06:35:38,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2024-11-09 06:35:38,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.42) internal successors, (71), 55 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 06:35:39,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2024-11-09 06:35:39,000 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 19 [2024-11-09 06:35:39,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:39,000 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2024-11-09 06:35:39,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:35:39,001 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2024-11-09 06:35:39,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-09 06:35:39,001 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:39,002 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:39,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 06:35:39,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 06:35:39,206 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:35:39,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:39,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1782027694, now seen corresponding path program 1 times [2024-11-09 06:35:39,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:39,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922003319] [2024-11-09 06:35:39,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:39,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:39,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 06:35:39,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:39,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922003319] [2024-11-09 06:35:39,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922003319] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:35:39,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:35:39,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:35:39,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359074536] [2024-11-09 06:35:39,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:35:39,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:35:39,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:39,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:35:39,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:35:39,258 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:35:39,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:39,281 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2024-11-09 06:35:39,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:35:39,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-09 06:35:39,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:39,283 INFO L225 Difference]: With dead ends: 56 [2024-11-09 06:35:39,283 INFO L226 Difference]: Without dead ends: 56 [2024-11-09 06:35:39,283 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:35:39,284 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:39,284 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 41 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:35:39,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-09 06:35:39,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-11-09 06:35:39,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.38) internal successors, (69), 55 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:35:39,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2024-11-09 06:35:39,296 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 20 [2024-11-09 06:35:39,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:39,303 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2024-11-09 06:35:39,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:35:39,303 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2024-11-09 06:35:39,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 06:35:39,304 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:39,304 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:39,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 06:35:39,304 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:35:39,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:39,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1165072097, now seen corresponding path program 1 times [2024-11-09 06:35:39,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:39,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105552614] [2024-11-09 06:35:39,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:39,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:39,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:35:39,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:39,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105552614] [2024-11-09 06:35:39,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105552614] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:39,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023336207] [2024-11-09 06:35:39,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:39,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:39,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:39,486 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:39,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 06:35:39,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:39,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 06:35:39,585 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:39,686 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:35:39,686 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:35:39,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023336207] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:39,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1057817486] [2024-11-09 06:35:39,768 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 06:35:39,768 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:39,769 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:39,769 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:39,769 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:48,217 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:49,103 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1693#(and (<= 1 |ULTIMATE.start_foo_~i~1#1|) (exists ((|v_ULTIMATE.start_bar_~b#1.offset_37| Int) (|v_ULTIMATE.start_bar_~b#1.base_38| Int) (|v_ULTIMATE.start_bar_~i~0#1_62| Int)) (and (<= 0 |v_ULTIMATE.start_bar_~i~0#1_62|) (<= (+ |v_ULTIMATE.start_bar_~i~0#1_62| 1) |ULTIMATE.start_bar_~size#1|) (or (< (select |#length| |v_ULTIMATE.start_bar_~b#1.base_38|) (+ (* |v_ULTIMATE.start_bar_~i~0#1_62| 4) |v_ULTIMATE.start_bar_~b#1.offset_37| 4)) (< (+ (* |v_ULTIMATE.start_bar_~i~0#1_62| 4) |v_ULTIMATE.start_bar_~b#1.offset_37|) 0)))) (<= 1 |ULTIMATE.start_foo_~size#1|))' at error location [2024-11-09 06:35:49,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:35:49,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:35:49,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2024-11-09 06:35:49,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617955727] [2024-11-09 06:35:49,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:35:49,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 06:35:49,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:49,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 06:35:49,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2024-11-09 06:35:49,107 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 06:35:49,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:49,773 INFO L93 Difference]: Finished difference Result 99 states and 123 transitions. [2024-11-09 06:35:49,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 06:35:49,774 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-09 06:35:49,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:49,775 INFO L225 Difference]: With dead ends: 99 [2024-11-09 06:35:49,776 INFO L226 Difference]: Without dead ends: 99 [2024-11-09 06:35:49,777 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 06:35:49,778 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 84 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:49,778 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 35 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:35:49,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-09 06:35:49,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 68. [2024-11-09 06:35:49,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 67 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 06:35:49,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2024-11-09 06:35:49,785 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 22 [2024-11-09 06:35:49,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:49,786 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2024-11-09 06:35:49,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 06:35:49,786 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2024-11-09 06:35:49,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 06:35:49,787 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:49,787 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:49,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 06:35:49,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 06:35:49,989 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:35:49,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:49,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1165084607, now seen corresponding path program 1 times [2024-11-09 06:35:49,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:49,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463858381] [2024-11-09 06:35:49,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:49,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:35:50,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:50,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463858381] [2024-11-09 06:35:50,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463858381] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:50,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033132523] [2024-11-09 06:35:50,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:50,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:50,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:50,563 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:50,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 06:35:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:50,685 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 06:35:50,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:50,706 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 06:35:50,712 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 06:35:50,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:35:50,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 06:35:50,786 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 06:35:50,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 06:35:50,920 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 06:35:50,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-09 06:35:50,942 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 06:35:50,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 06:35:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:35:51,111 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:51,376 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:35:51,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-09 06:35:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:35:51,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033132523] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:51,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1701801734] [2024-11-09 06:35:51,585 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 06:35:51,586 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:51,586 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:51,587 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:51,587 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:59,317 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:36:00,157 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2045#(and (exists ((|v_ULTIMATE.start_foo_~size#1_44| Int) (|v_ULTIMATE.start_foo_~i~1#1_91| Int) (|v_ULTIMATE.start_foo_~#a~0#1.base_48| Int) (|v_#valid_111| (Array Int Int)) (|v_ULTIMATE.start_bar_~res~0#1_70| Int)) (and (<= 0 (+ |v_ULTIMATE.start_bar_~res~0#1_70| 2147483648)) (<= |v_ULTIMATE.start_bar_~res~0#1_70| 2147483647) (or (and (= |#valid| (store |v_#valid_111| |v_ULTIMATE.start_foo_~#a~0#1.base_48| 0)) (not (= |v_ULTIMATE.start_bar_~res~0#1_70| 0)) (= |v_ULTIMATE.start_foo_~size#1_44| |ULTIMATE.start_main_#t~ret5#1|)) (and (= |v_ULTIMATE.start_bar_~res~0#1_70| 0) (= |#valid| (store |v_#valid_111| |v_ULTIMATE.start_foo_~#a~0#1.base_48| 0)) (= |ULTIMATE.start_main_#t~ret5#1| |v_ULTIMATE.start_foo_~i~1#1_91|))))) (<= |ULTIMATE.start_main_#t~ret5#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_#t~ret5#1| 2147483648)))' at error location [2024-11-09 06:36:00,158 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:36:00,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:36:00,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 14 [2024-11-09 06:36:00,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757539982] [2024-11-09 06:36:00,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:36:00,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 06:36:00,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:00,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 06:36:00,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2024-11-09 06:36:00,161 INFO L87 Difference]: Start difference. First operand 68 states and 88 transitions. Second operand has 16 states, 15 states have (on average 4.4) internal successors, (66), 15 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 06:36:00,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:00,844 INFO L93 Difference]: Finished difference Result 205 states and 267 transitions. [2024-11-09 06:36:00,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 06:36:00,845 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-09 06:36:00,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:00,848 INFO L225 Difference]: With dead ends: 205 [2024-11-09 06:36:00,848 INFO L226 Difference]: Without dead ends: 205 [2024-11-09 06:36:00,849 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2024-11-09 06:36:00,850 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 88 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:00,850 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 84 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:36:00,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-09 06:36:00,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 193. [2024-11-09 06:36:00,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 187 states have (on average 1.3957219251336899) internal successors, (261), 192 states have internal predecessors, (261), 0 states have call successors, (0), 0 states 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 06:36:00,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 261 transitions. [2024-11-09 06:36:00,862 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 261 transitions. Word has length 22 [2024-11-09 06:36:00,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:00,863 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 261 transitions. [2024-11-09 06:36:00,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.4) internal successors, (66), 15 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 06:36:00,863 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 261 transitions. [2024-11-09 06:36:00,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-09 06:36:00,864 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:00,864 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2024-11-09 06:36:00,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 06:36:01,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:01,066 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:36:01,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:01,066 INFO L85 PathProgramCache]: Analyzing trace with hash -226782628, now seen corresponding path program 2 times [2024-11-09 06:36:01,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:01,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055688951] [2024-11-09 06:36:01,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:01,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:01,253 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:36:01,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:01,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055688951] [2024-11-09 06:36:01,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055688951] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:36:01,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543253900] [2024-11-09 06:36:01,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:36:01,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:01,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:36:01,257 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:36:01,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 06:36:01,392 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 06:36:01,392 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:36:01,394 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 06:36:01,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:36:01,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:36:01,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-09 06:36:01,564 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 06:36:01,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 06:36:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 06:36:01,634 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:36:01,891 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 65 treesize of output 61 [2024-11-09 06:36:01,931 INFO L349 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2024-11-09 06:36:01,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 59 [2024-11-09 06:36:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 06:36:02,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543253900] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:36:02,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2021249522] [2024-11-09 06:36:02,019 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:36:02,019 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:36:02,020 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:36:02,020 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:36:02,020 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:36:02,705 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:36:06,440 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2613#(and (<= 2 |ULTIMATE.start_foo_~#a~0#1.base|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_foo_~size#1| 1) (exists ((|v_ULTIMATE.start_foo_~i~1#1_104| Int) (|v_ULTIMATE.start_foo_~b#1.base_48| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~i~1#1_104|) (<= (select |#length| |v_ULTIMATE.start_foo_~b#1.base_48|) (+ 3 (* |v_ULTIMATE.start_foo_~i~1#1_104| 4))) (<= 2 |v_ULTIMATE.start_foo_~b#1.base_48|) (<= (+ |v_ULTIMATE.start_foo_~i~1#1_104| 1) |ULTIMATE.start_foo_~size#1|))) (<= 0 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~i~2#1| 1) (= |ULTIMATE.start_foo_~#a~0#1.offset| 0))' at error location [2024-11-09 06:36:06,440 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:36:06,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:36:06,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2024-11-09 06:36:06,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748430207] [2024-11-09 06:36:06,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:36:06,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 06:36:06,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:06,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 06:36:06,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=376, Unknown=1, NotChecked=0, Total=462 [2024-11-09 06:36:06,445 INFO L87 Difference]: Start difference. First operand 193 states and 261 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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 06:36:07,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:07,123 INFO L93 Difference]: Finished difference Result 168 states and 210 transitions. [2024-11-09 06:36:07,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 06:36:07,124 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-09 06:36:07,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:07,125 INFO L225 Difference]: With dead ends: 168 [2024-11-09 06:36:07,125 INFO L226 Difference]: Without dead ends: 166 [2024-11-09 06:36:07,126 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=196, Invalid=795, Unknown=1, NotChecked=0, Total=992 [2024-11-09 06:36:07,127 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 160 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:07,127 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 21 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:36:07,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-09 06:36:07,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 126. [2024-11-09 06:36:07,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.3471074380165289) internal successors, (163), 125 states have internal predecessors, (163), 0 states have call successors, (0), 0 states 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 06:36:07,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 163 transitions. [2024-11-09 06:36:07,135 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 163 transitions. Word has length 24 [2024-11-09 06:36:07,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:07,136 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 163 transitions. [2024-11-09 06:36:07,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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 06:36:07,136 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 163 transitions. [2024-11-09 06:36:07,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 06:36:07,137 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:07,137 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:36:07,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 06:36:07,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:07,342 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:36:07,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:07,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1745960863, now seen corresponding path program 1 times [2024-11-09 06:36:07,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:07,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173136679] [2024-11-09 06:36:07,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:07,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:07,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 06:36:07,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:07,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173136679] [2024-11-09 06:36:07,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173136679] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:36:07,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:36:07,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:36:07,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185714462] [2024-11-09 06:36:07,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:36:07,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:36:07,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:07,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:36:07,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:36:07,509 INFO L87 Difference]: Start difference. First operand 126 states and 163 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 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 06:36:07,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:07,585 INFO L93 Difference]: Finished difference Result 125 states and 162 transitions. [2024-11-09 06:36:07,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:36:07,586 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 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 27 [2024-11-09 06:36:07,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:07,587 INFO L225 Difference]: With dead ends: 125 [2024-11-09 06:36:07,587 INFO L226 Difference]: Without dead ends: 125 [2024-11-09 06:36:07,587 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:36:07,588 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:07,588 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 34 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:36:07,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-09 06:36:07,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2024-11-09 06:36:07,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 118 states have (on average 1.347457627118644) internal successors, (159), 121 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 06:36:07,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 159 transitions. [2024-11-09 06:36:07,595 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 159 transitions. Word has length 27 [2024-11-09 06:36:07,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:07,595 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 159 transitions. [2024-11-09 06:36:07,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 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 06:36:07,596 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 159 transitions. [2024-11-09 06:36:07,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 06:36:07,597 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:07,597 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 06:36:07,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 06:36:07,598 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:36:07,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:07,598 INFO L85 PathProgramCache]: Analyzing trace with hash 26394036, now seen corresponding path program 1 times [2024-11-09 06:36:07,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:07,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946265883] [2024-11-09 06:36:07,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:07,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:07,891 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:36:07,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:07,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946265883] [2024-11-09 06:36:07,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946265883] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:36:07,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344115127] [2024-11-09 06:36:07,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:07,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:07,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:36:07,896 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:36:07,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 06:36:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:08,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 06:36:08,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:36:08,137 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 06:36:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:36:08,188 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:36:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:36:08,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344115127] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:36:08,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1886144549] [2024-11-09 06:36:08,387 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 06:36:08,387 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:36:08,388 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:36:08,388 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:36:08,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:36:14,523 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:36:15,489 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3361#(and (exists ((|v_ULTIMATE.start_foo_~i~1#1_124| Int) (|v_ULTIMATE.start_foo_~#a~0#1.base_61| Int)) (and (<= (+ |v_ULTIMATE.start_foo_~i~1#1_124| 1) |ULTIMATE.start_foo_~size#1|) (<= 0 |v_ULTIMATE.start_foo_~i~1#1_124|) (<= (+ (* |v_ULTIMATE.start_foo_~i~1#1_124| 4) 4 |ULTIMATE.start_foo_~b#1.offset|) (select |#length| |ULTIMATE.start_foo_~b#1.base|)) (<= 0 (+ (* |v_ULTIMATE.start_foo_~i~1#1_124| 4) |ULTIMATE.start_foo_~b#1.offset|)) (<= (select |#length| |v_ULTIMATE.start_foo_~#a~0#1.base_61|) (+ (* |v_ULTIMATE.start_foo_~i~1#1_124| 4) 3)) (= |ULTIMATE.start_foo_#t~mem2#1| (select (select |#memory_int| |ULTIMATE.start_foo_~b#1.base|) (+ (* |v_ULTIMATE.start_foo_~i~1#1_124| 4) |ULTIMATE.start_foo_~b#1.offset|))))) (<= |ULTIMATE.start_foo_~size#1| 99) (<= |ULTIMATE.start_main_~i~2#1| 99) (= (select |#valid| |ULTIMATE.start_foo_~b#1.base|) 1))' at error location [2024-11-09 06:36:15,489 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:36:15,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:36:15,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-09 06:36:15,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987577481] [2024-11-09 06:36:15,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:36:15,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 06:36:15,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:15,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 06:36:15,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2024-11-09 06:36:15,492 INFO L87 Difference]: Start difference. First operand 122 states and 159 transitions. Second operand has 11 states, 10 states have (on average 6.1) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:36:16,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:16,191 INFO L93 Difference]: Finished difference Result 192 states and 243 transitions. [2024-11-09 06:36:16,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 06:36:16,193 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.1) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-09 06:36:16,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:16,194 INFO L225 Difference]: With dead ends: 192 [2024-11-09 06:36:16,194 INFO L226 Difference]: Without dead ends: 192 [2024-11-09 06:36:16,195 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2024-11-09 06:36:16,196 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 163 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:16,196 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 84 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:36:16,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-09 06:36:16,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 160. [2024-11-09 06:36:16,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 156 states have (on average 1.3461538461538463) internal successors, (210), 159 states have internal predecessors, (210), 0 states have call successors, (0), 0 states 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 06:36:16,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 210 transitions. [2024-11-09 06:36:16,208 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 210 transitions. Word has length 28 [2024-11-09 06:36:16,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:16,209 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 210 transitions. [2024-11-09 06:36:16,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.1) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:36:16,211 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 210 transitions. [2024-11-09 06:36:16,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 06:36:16,212 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:16,212 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:36:16,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 06:36:16,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 06:36:16,416 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:36:16,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:16,417 INFO L85 PathProgramCache]: Analyzing trace with hash 831486042, now seen corresponding path program 2 times [2024-11-09 06:36:16,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:16,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151267252] [2024-11-09 06:36:16,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:16,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:16,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:36:16,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:16,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151267252] [2024-11-09 06:36:16,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151267252] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:36:16,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549237379] [2024-11-09 06:36:16,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:36:16,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:16,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:36:16,610 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:36:16,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 06:36:16,738 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-09 06:36:16,738 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:36:16,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 06:36:16,741 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:36:16,802 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 06:36:16,802 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:36:16,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549237379] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:36:16,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:36:16,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-09 06:36:16,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673379720] [2024-11-09 06:36:16,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:36:16,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:36:16,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:16,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:36:16,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 06:36:16,805 INFO L87 Difference]: Start difference. First operand 160 states and 210 transitions. Second operand has 5 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 06:36:16,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:16,934 INFO L93 Difference]: Finished difference Result 152 states and 194 transitions. [2024-11-09 06:36:16,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:36:16,935 INFO L78 Accepts]: Start accepts. Automaton has has 5 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 29 [2024-11-09 06:36:16,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:16,936 INFO L225 Difference]: With dead ends: 152 [2024-11-09 06:36:16,936 INFO L226 Difference]: Without dead ends: 144 [2024-11-09 06:36:16,937 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-09 06:36:16,938 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:16,938 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 57 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:36:16,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-09 06:36:16,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2024-11-09 06:36:16,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 140 states have (on average 1.2857142857142858) internal successors, (180), 143 states have internal predecessors, (180), 0 states have call successors, (0), 0 states 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 06:36:16,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 180 transitions. [2024-11-09 06:36:16,945 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 180 transitions. Word has length 29 [2024-11-09 06:36:16,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:16,945 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 180 transitions. [2024-11-09 06:36:16,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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 06:36:16,945 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 180 transitions. [2024-11-09 06:36:16,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-09 06:36:16,946 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:16,946 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-09 06:36:16,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 06:36:17,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 06:36:17,152 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:36:17,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:17,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1152812878, now seen corresponding path program 2 times [2024-11-09 06:36:17,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:17,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104295032] [2024-11-09 06:36:17,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:17,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:36:17,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:17,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104295032] [2024-11-09 06:36:17,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104295032] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:36:17,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106471337] [2024-11-09 06:36:17,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:36:17,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:17,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:36:17,414 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:36:17,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 06:36:17,552 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-09 06:36:17,552 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:36:17,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 06:36:17,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:36:17,639 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 10 treesize of output 9 [2024-11-09 06:36:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 06:36:18,012 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:36:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 06:36:18,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106471337] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:36:18,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1819877173] [2024-11-09 06:36:18,649 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 06:36:18,649 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:36:18,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:36:18,650 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:36:18,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:36:25,771 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:36:26,921 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4362#(and (<= |ULTIMATE.start_foo_~size#1| 99) (exists ((|v_ULTIMATE.start_foo_~i~1#1_146| Int) (|v_ULTIMATE.start_foo_~#a~0#1.base_69| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~i~1#1_146|) (= (select (select |#memory_int| |ULTIMATE.start_foo_~b#1.base|) (+ (* |v_ULTIMATE.start_foo_~i~1#1_146| 4) |ULTIMATE.start_foo_~b#1.offset|)) |ULTIMATE.start_foo_#t~mem2#1|) (<= (+ (* |v_ULTIMATE.start_foo_~i~1#1_146| 4) 4 |ULTIMATE.start_foo_~b#1.offset|) (select |#length| |ULTIMATE.start_foo_~b#1.base|)) (<= (+ |v_ULTIMATE.start_foo_~i~1#1_146| 1) |ULTIMATE.start_foo_~size#1|) (<= (select |#length| |v_ULTIMATE.start_foo_~#a~0#1.base_69|) (+ (* |v_ULTIMATE.start_foo_~i~1#1_146| 4) 3)) (<= 0 (+ (* |v_ULTIMATE.start_foo_~i~1#1_146| 4) |ULTIMATE.start_foo_~b#1.offset|)))) (<= |ULTIMATE.start_main_~i~2#1| 99) (= (select |#valid| |ULTIMATE.start_foo_~b#1.base|) 1))' at error location [2024-11-09 06:36:26,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:36:26,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:36:26,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-09 06:36:26,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11425198] [2024-11-09 06:36:26,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:36:26,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 06:36:26,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:26,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 06:36:26,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2024-11-09 06:36:26,924 INFO L87 Difference]: Start difference. First operand 144 states and 180 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 06:36:29,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:29,161 INFO L93 Difference]: Finished difference Result 187 states and 216 transitions. [2024-11-09 06:36:29,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-09 06:36:29,162 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-09 06:36:29,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:29,163 INFO L225 Difference]: With dead ends: 187 [2024-11-09 06:36:29,163 INFO L226 Difference]: Without dead ends: 187 [2024-11-09 06:36:29,165 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=504, Invalid=2466, Unknown=0, NotChecked=0, Total=2970 [2024-11-09 06:36:29,165 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 149 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:29,166 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 79 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:36:29,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-11-09 06:36:29,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 108. [2024-11-09 06:36:29,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 105 states have (on average 1.180952380952381) internal successors, (124), 107 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:36:29,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2024-11-09 06:36:29,171 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 36 [2024-11-09 06:36:29,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:29,172 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2024-11-09 06:36:29,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 06:36:29,172 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2024-11-09 06:36:29,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-09 06:36:29,174 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:29,174 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1] [2024-11-09 06:36:29,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 06:36:29,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 06:36:29,375 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:36:29,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:29,376 INFO L85 PathProgramCache]: Analyzing trace with hash 2037504814, now seen corresponding path program 3 times [2024-11-09 06:36:29,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:29,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053634941] [2024-11-09 06:36:29,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:29,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:29,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:29,816 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 06:36:29,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:29,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053634941] [2024-11-09 06:36:29,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053634941] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:36:29,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189343765] [2024-11-09 06:36:29,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:36:29,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:29,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:36:29,820 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:36:29,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 06:36:29,987 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:36:29,987 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:36:29,989 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 06:36:29,992 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:36:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-09 06:36:30,159 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:36:30,384 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-09 06:36:30,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189343765] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:36:30,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [166916361] [2024-11-09 06:36:30,387 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 06:36:30,387 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:36:30,387 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:36:30,387 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:36:30,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:36:36,946 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:36:38,042 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4971#(and (<= 1 |ULTIMATE.start_foo_~i~1#1|) (exists ((|v_ULTIMATE.start_bar_~i~0#1_150| Int) (|v_ULTIMATE.start_bar_~b#1.base_66| Int) (|v_ULTIMATE.start_bar_~b#1.offset_65| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_bar_~b#1.base_66|) (+ |v_ULTIMATE.start_bar_~b#1.offset_65| (* |v_ULTIMATE.start_bar_~i~0#1_150| 4) 4)) (< (+ |v_ULTIMATE.start_bar_~b#1.offset_65| (* |v_ULTIMATE.start_bar_~i~0#1_150| 4)) 0)) (<= 0 |v_ULTIMATE.start_bar_~i~0#1_150|) (<= (+ |v_ULTIMATE.start_bar_~i~0#1_150| 1) |ULTIMATE.start_bar_~size#1|))) (<= 1 |ULTIMATE.start_foo_~size#1|))' at error location [2024-11-09 06:36:38,042 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:36:38,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:36:38,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-09 06:36:38,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700545366] [2024-11-09 06:36:38,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:36:38,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 06:36:38,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:38,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 06:36:38,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2024-11-09 06:36:38,044 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand has 17 states, 16 states have (on average 3.125) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:36:38,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:38,687 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2024-11-09 06:36:38,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 06:36:38,687 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.125) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-09 06:36:38,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:38,688 INFO L225 Difference]: With dead ends: 131 [2024-11-09 06:36:38,688 INFO L226 Difference]: Without dead ends: 131 [2024-11-09 06:36:38,689 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 06:36:38,689 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:38,690 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 75 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:36:38,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-11-09 06:36:38,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2024-11-09 06:36:38,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 100 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:36:38,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2024-11-09 06:36:38,695 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 40 [2024-11-09 06:36:38,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:38,696 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2024-11-09 06:36:38,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.125) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:36:38,696 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2024-11-09 06:36:38,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-09 06:36:38,697 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:38,697 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:36:38,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 06:36:38,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:38,899 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:36:38,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:38,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1713694264, now seen corresponding path program 1 times [2024-11-09 06:36:38,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:38,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118800526] [2024-11-09 06:36:38,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:38,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 60 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 06:36:39,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:39,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118800526] [2024-11-09 06:36:39,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118800526] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:36:39,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504610262] [2024-11-09 06:36:39,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:39,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:39,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:36:39,218 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:36:39,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 06:36:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:39,442 INFO L255 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 06:36:39,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:36:39,594 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 66 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 06:36:39,594 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:36:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 66 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 06:36:39,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504610262] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:36:39,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2107656176] [2024-11-09 06:36:39,714 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 06:36:39,715 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:36:39,715 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:36:39,715 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:36:39,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:36:45,260 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:36:46,704 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5578#(and (exists ((|v_ULTIMATE.start_main_old_#valid#1_10| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_10| |#valid|))) (= |ULTIMATE.start_main_#res#1| 1) (exists ((|v_ULTIMATE.start_bar_~res~0#1_151| Int) (|v_ULTIMATE.start_main_~#b~0#1.offset_24| Int) (|v_ULTIMATE.start_main_~i~2#1_95| Int) (|v_ULTIMATE.start_main_~#b~0#1.base_27| Int) (|v_ULTIMATE.start_foo_~size#1_75| Int) (|v_#memory_int_155| (Array Int (Array Int Int))) (|v_ULTIMATE.start_foo_~#a~0#1.base_81| Int) (|v_#valid_182| (Array Int Int)) (|v_ULTIMATE.start_foo_~i~1#1_182| Int) (|v_#valid_181| (Array Int Int))) (and (<= |v_ULTIMATE.start_bar_~res~0#1_151| 2147483647) (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_27|) |v_ULTIMATE.start_main_~#b~0#1.offset_24|) 0)) (<= (+ |v_ULTIMATE.start_main_~#b~0#1.offset_24| (* |v_ULTIMATE.start_main_~i~2#1_95| 4)) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_27|)) (= (store |v_#valid_182| |v_ULTIMATE.start_main_~#b~0#1.base_27| 0) |#valid|) (= (select |v_#valid_182| |v_ULTIMATE.start_main_~#b~0#1.base_27|) 1) (<= 0 (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_27|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_24| (* |v_ULTIMATE.start_main_~i~2#1_95| 4) (- 4))) 2147483648)) (<= 100 |v_ULTIMATE.start_main_~i~2#1_95|) (= |#memory_int| (store |v_#memory_int_155| |v_ULTIMATE.start_main_~#b~0#1.base_27| (store (select |v_#memory_int_155| |v_ULTIMATE.start_main_~#b~0#1.base_27|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_24| (* |v_ULTIMATE.start_main_~i~2#1_95| 4) (- 4)) (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_27|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_24| (* |v_ULTIMATE.start_main_~i~2#1_95| 4) (- 4)))))) (or (and (= |v_#valid_182| (store |v_#valid_181| |v_ULTIMATE.start_foo_~#a~0#1.base_81| 0)) (= |v_ULTIMATE.start_foo_~size#1_75| (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_27|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_24| (* |v_ULTIMATE.start_main_~i~2#1_95| 4) (- 4)))) (not (= |v_ULTIMATE.start_bar_~res~0#1_151| 0))) (and (= |v_#valid_182| (store |v_#valid_181| |v_ULTIMATE.start_foo_~#a~0#1.base_81| 0)) (= |v_ULTIMATE.start_foo_~i~1#1_182| (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_27|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_24| (* |v_ULTIMATE.start_main_~i~2#1_95| 4) (- 4)))) (= |v_ULTIMATE.start_bar_~res~0#1_151| 0))) (<= 0 (+ |v_ULTIMATE.start_bar_~res~0#1_151| 2147483648)) (<= (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_27|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_24| (* |v_ULTIMATE.start_main_~i~2#1_95| 4) (- 4))) 2147483647) (<= 0 |v_ULTIMATE.start_main_~#b~0#1.offset_24|))))' at error location [2024-11-09 06:36:46,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:36:46,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:36:46,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-09 06:36:46,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715506583] [2024-11-09 06:36:46,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:36:46,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 06:36:46,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:46,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 06:36:46,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=615, Unknown=2, NotChecked=0, Total=702 [2024-11-09 06:36:46,707 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states 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 06:36:47,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:47,068 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2024-11-09 06:36:47,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 06:36:47,068 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-11-09 06:36:47,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:47,069 INFO L225 Difference]: With dead ends: 90 [2024-11-09 06:36:47,069 INFO L226 Difference]: Without dead ends: 90 [2024-11-09 06:36:47,070 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 148 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=110, Invalid=758, Unknown=2, NotChecked=0, Total=870 [2024-11-09 06:36:47,071 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:47,071 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 65 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:36:47,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-09 06:36:47,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2024-11-09 06:36:47,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 83 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:36:47,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2024-11-09 06:36:47,075 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 57 [2024-11-09 06:36:47,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:47,076 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2024-11-09 06:36:47,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states 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 06:36:47,076 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2024-11-09 06:36:47,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-09 06:36:47,077 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:47,077 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:36:47,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 06:36:47,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:47,278 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:36:47,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:47,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1180182558, now seen corresponding path program 2 times [2024-11-09 06:36:47,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:47,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094797939] [2024-11-09 06:36:47,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:47,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:47,689 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 72 proven. 37 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 06:36:47,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:47,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094797939] [2024-11-09 06:36:47,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094797939] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:36:47,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541958603] [2024-11-09 06:36:47,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:36:47,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:47,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:36:47,693 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:36:47,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 06:36:47,899 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 06:36:47,899 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:36:47,904 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 06:36:47,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:36:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-09 06:36:48,095 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:36:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-09 06:36:48,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541958603] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:36:48,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1160302917] [2024-11-09 06:36:48,373 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 06:36:48,373 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:36:48,374 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:36:48,374 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:36:48,374 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:36:55,245 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:36:57,148 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6175#(and (exists ((|v_ULTIMATE.start_main_~i~2#1_105| Int) (|v_ULTIMATE.start_foo_~#a~0#1.base_86| Int) (|v_#valid_196| (Array Int Int)) (|v_#valid_195| (Array Int Int)) (|v_ULTIMATE.start_main_~#b~0#1.base_28| Int) (|v_ULTIMATE.start_foo_~i~1#1_200| Int) (|v_ULTIMATE.start_main_~#b~0#1.offset_26| Int) (|v_ULTIMATE.start_foo_~size#1_80| Int) (|v_ULTIMATE.start_bar_~res~0#1_168| Int) (|v_#memory_int_173| (Array Int (Array Int Int)))) (and (<= 0 (+ |v_ULTIMATE.start_bar_~res~0#1_168| 2147483648)) (= (store |v_#valid_196| |v_ULTIMATE.start_main_~#b~0#1.base_28| 0) |#valid|) (or (and (= |v_#valid_196| (store |v_#valid_195| |v_ULTIMATE.start_foo_~#a~0#1.base_86| 0)) (= |v_ULTIMATE.start_foo_~i~1#1_200| (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_28|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_26| (* |v_ULTIMATE.start_main_~i~2#1_105| 4) (- 4)))) (= |v_ULTIMATE.start_bar_~res~0#1_168| 0)) (and (= |v_#valid_196| (store |v_#valid_195| |v_ULTIMATE.start_foo_~#a~0#1.base_86| 0)) (= |v_ULTIMATE.start_foo_~size#1_80| (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_28|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_26| (* |v_ULTIMATE.start_main_~i~2#1_105| 4) (- 4)))) (not (= |v_ULTIMATE.start_bar_~res~0#1_168| 0)))) (<= 0 (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_28|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_26| (* |v_ULTIMATE.start_main_~i~2#1_105| 4) (- 4))) 2147483648)) (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_28|) |v_ULTIMATE.start_main_~#b~0#1.offset_26|) 0)) (= |#memory_int| (store |v_#memory_int_173| |v_ULTIMATE.start_main_~#b~0#1.base_28| (store (select |v_#memory_int_173| |v_ULTIMATE.start_main_~#b~0#1.base_28|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_26| (* |v_ULTIMATE.start_main_~i~2#1_105| 4) (- 4)) (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_28|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_26| (* |v_ULTIMATE.start_main_~i~2#1_105| 4) (- 4)))))) (<= 100 |v_ULTIMATE.start_main_~i~2#1_105|) (<= 0 |v_ULTIMATE.start_main_~#b~0#1.offset_26|) (<= (+ |v_ULTIMATE.start_main_~#b~0#1.offset_26| (* |v_ULTIMATE.start_main_~i~2#1_105| 4)) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_28|)) (= (select |v_#valid_196| |v_ULTIMATE.start_main_~#b~0#1.base_28|) 1) (<= (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_28|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_26| (* |v_ULTIMATE.start_main_~i~2#1_105| 4) (- 4))) 2147483647) (<= |v_ULTIMATE.start_bar_~res~0#1_168| 2147483647))) (exists ((|v_ULTIMATE.start_main_old_#valid#1_11| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_11| |#valid|))) (= |ULTIMATE.start_main_#res#1| 1))' at error location [2024-11-09 06:36:57,149 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:36:57,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:36:57,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-11-09 06:36:57,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600457642] [2024-11-09 06:36:57,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:36:57,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 06:36:57,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:57,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 06:36:57,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=868, Unknown=2, NotChecked=0, Total=992 [2024-11-09 06:36:57,152 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:36:58,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:58,414 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2024-11-09 06:36:58,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 06:36:58,415 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2024-11-09 06:36:58,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:58,416 INFO L225 Difference]: With dead ends: 106 [2024-11-09 06:36:58,416 INFO L226 Difference]: Without dead ends: 106 [2024-11-09 06:36:58,417 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=427, Invalid=2223, Unknown=2, NotChecked=0, Total=2652 [2024-11-09 06:36:58,418 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 267 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:58,418 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 32 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:36:58,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-09 06:36:58,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2024-11-09 06:36:58,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 100 states have (on average 1.11) internal successors, (111), 101 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:36:58,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2024-11-09 06:36:58,423 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 65 [2024-11-09 06:36:58,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:58,424 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2024-11-09 06:36:58,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:36:58,424 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2024-11-09 06:36:58,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-09 06:36:58,426 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:58,426 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 4, 1, 1] [2024-11-09 06:36:58,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 06:36:58,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:58,628 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:36:58,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:58,628 INFO L85 PathProgramCache]: Analyzing trace with hash 568276670, now seen corresponding path program 2 times [2024-11-09 06:36:58,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:58,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491561133] [2024-11-09 06:36:58,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:58,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 185 proven. 73 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-09 06:36:59,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:59,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491561133] [2024-11-09 06:36:59,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491561133] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:36:59,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415999362] [2024-11-09 06:36:59,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:36:59,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:59,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:36:59,214 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:36:59,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 06:36:59,523 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 06:36:59,524 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:36:59,527 INFO L255 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 06:36:59,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:36:59,883 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 162 proven. 48 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-09 06:36:59,883 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:37:00,220 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 166 proven. 44 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-09 06:37:00,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415999362] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:37:00,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [360680300] [2024-11-09 06:37:00,223 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 06:37:00,223 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:37:00,224 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:37:00,224 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:37:00,224 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:37:06,013 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:37:07,026 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6962#(and (<= |ULTIMATE.start_main_#t~ret5#1| 2147483647) (exists ((|v_ULTIMATE.start_bar_~res~0#1_191| Int) (|v_ULTIMATE.start_foo_~size#1_86| Int) (|v_#valid_210| (Array Int Int)) (|v_ULTIMATE.start_foo_~i~1#1_220| Int) (|v_ULTIMATE.start_foo_~#a~0#1.base_92| Int)) (and (<= |v_ULTIMATE.start_bar_~res~0#1_191| 2147483647) (or (and (= |v_ULTIMATE.start_foo_~i~1#1_220| |ULTIMATE.start_main_#t~ret5#1|) (= (store |v_#valid_210| |v_ULTIMATE.start_foo_~#a~0#1.base_92| 0) |#valid|) (= |v_ULTIMATE.start_bar_~res~0#1_191| 0)) (and (= |v_ULTIMATE.start_foo_~size#1_86| |ULTIMATE.start_main_#t~ret5#1|) (= (store |v_#valid_210| |v_ULTIMATE.start_foo_~#a~0#1.base_92| 0) |#valid|) (not (= |v_ULTIMATE.start_bar_~res~0#1_191| 0)))) (<= 0 (+ |v_ULTIMATE.start_bar_~res~0#1_191| 2147483648)))) (<= 0 (+ |ULTIMATE.start_main_#t~ret5#1| 2147483648)))' at error location [2024-11-09 06:37:07,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:37:07,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:37:07,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2024-11-09 06:37:07,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428143808] [2024-11-09 06:37:07,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:37:07,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 06:37:07,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:37:07,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 06:37:07,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2024-11-09 06:37:07,028 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand has 21 states, 21 states have (on average 5.666666666666667) internal successors, (119), 21 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:37:08,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:37:08,476 INFO L93 Difference]: Finished difference Result 117 states and 125 transitions. [2024-11-09 06:37:08,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-09 06:37:08,477 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.666666666666667) internal successors, (119), 21 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2024-11-09 06:37:08,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:37:08,478 INFO L225 Difference]: With dead ends: 117 [2024-11-09 06:37:08,478 INFO L226 Difference]: Without dead ends: 117 [2024-11-09 06:37:08,479 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 231 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=455, Invalid=2197, Unknown=0, NotChecked=0, Total=2652 [2024-11-09 06:37:08,480 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 88 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:37:08,481 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 51 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:37:08,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-09 06:37:08,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 109. [2024-11-09 06:37:08,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.0934579439252337) internal successors, (117), 108 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 06:37:08,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 117 transitions. [2024-11-09 06:37:08,486 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 117 transitions. Word has length 85 [2024-11-09 06:37:08,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:37:08,487 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 117 transitions. [2024-11-09 06:37:08,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.666666666666667) internal successors, (119), 21 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:37:08,488 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 117 transitions. [2024-11-09 06:37:08,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-09 06:37:08,489 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:37:08,489 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 4, 1, 1] [2024-11-09 06:37:08,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 06:37:08,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:08,690 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:37:08,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:37:08,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1221100027, now seen corresponding path program 3 times [2024-11-09 06:37:08,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:37:08,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548818015] [2024-11-09 06:37:08,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:08,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:37:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 222 proven. 64 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2024-11-09 06:37:09,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:37:09,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548818015] [2024-11-09 06:37:09,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548818015] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:37:09,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972468174] [2024-11-09 06:37:09,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:37:09,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:09,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:37:09,141 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:37:09,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 06:37:09,885 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:37:09,885 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:37:09,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 06:37:09,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:37:10,138 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 264 proven. 6 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-09 06:37:10,138 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:37:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 264 proven. 6 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-09 06:37:10,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972468174] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:37:10,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [54759667] [2024-11-09 06:37:10,361 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 06:37:10,361 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:37:10,361 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:37:10,361 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:37:10,362 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:37:16,110 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:37:17,118 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7823#(and (exists ((|v_ULTIMATE.start_foo_~#a~0#1.base_98| Int) (|v_#valid_224| (Array Int Int)) (|v_ULTIMATE.start_foo_~i~1#1_244| Int) (|v_ULTIMATE.start_foo_~size#1_92| Int) (|v_ULTIMATE.start_bar_~res~0#1_214| Int)) (and (<= 0 (+ |v_ULTIMATE.start_bar_~res~0#1_214| 2147483648)) (or (and (not (= |v_ULTIMATE.start_bar_~res~0#1_214| 0)) (= |#valid| (store |v_#valid_224| |v_ULTIMATE.start_foo_~#a~0#1.base_98| 0)) (= |v_ULTIMATE.start_foo_~size#1_92| |ULTIMATE.start_main_#t~ret5#1|)) (and (= |v_ULTIMATE.start_bar_~res~0#1_214| 0) (= |v_ULTIMATE.start_foo_~i~1#1_244| |ULTIMATE.start_main_#t~ret5#1|) (= |#valid| (store |v_#valid_224| |v_ULTIMATE.start_foo_~#a~0#1.base_98| 0)))) (<= |v_ULTIMATE.start_bar_~res~0#1_214| 2147483647))) (<= |ULTIMATE.start_main_#t~ret5#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_#t~ret5#1| 2147483648)))' at error location [2024-11-09 06:37:17,119 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:37:17,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:37:17,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2024-11-09 06:37:17,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838462111] [2024-11-09 06:37:17,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:37:17,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 06:37:17,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:37:17,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 06:37:17,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2024-11-09 06:37:17,121 INFO L87 Difference]: Start difference. First operand 109 states and 117 transitions. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:37:18,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:37:18,222 INFO L93 Difference]: Finished difference Result 119 states and 126 transitions. [2024-11-09 06:37:18,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 06:37:18,222 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2024-11-09 06:37:18,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:37:18,223 INFO L225 Difference]: With dead ends: 119 [2024-11-09 06:37:18,223 INFO L226 Difference]: Without dead ends: 119 [2024-11-09 06:37:18,224 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 260 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=269, Invalid=1893, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 06:37:18,224 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 81 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:37:18,225 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 43 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:37:18,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-09 06:37:18,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2024-11-09 06:37:18,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 111 states have (on average 1.0810810810810811) internal successors, (120), 112 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 06:37:18,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 120 transitions. [2024-11-09 06:37:18,230 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 120 transitions. Word has length 95 [2024-11-09 06:37:18,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:37:18,231 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 120 transitions. [2024-11-09 06:37:18,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:37:18,231 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 120 transitions. [2024-11-09 06:37:18,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-09 06:37:18,232 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:37:18,233 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 4, 1, 1] [2024-11-09 06:37:18,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-09 06:37:18,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-09 06:37:18,437 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:37:18,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:37:18,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1832727506, now seen corresponding path program 4 times [2024-11-09 06:37:18,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:37:18,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907077850] [2024-11-09 06:37:18,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:18,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:37:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 216 proven. 144 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-09 06:37:18,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:37:18,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907077850] [2024-11-09 06:37:18,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907077850] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:37:18,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677541248] [2024-11-09 06:37:18,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:37:18,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:18,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:37:18,970 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:37:18,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 06:37:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:19,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 06:37:19,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:37:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 251 proven. 109 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-09 06:37:19,594 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:37:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 251 proven. 109 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-09 06:37:19,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677541248] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:37:19,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1892755351] [2024-11-09 06:37:19,897 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 06:37:19,897 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:37:19,898 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:37:19,898 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:37:19,898 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:37:25,500 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:37:26,561 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8706#(and (exists ((|v_ULTIMATE.start_foo_~#a~0#1.base_107| Int) (|v_#valid_244| (Array Int Int)) (|v_ULTIMATE.start_foo_~i~1#1_276| Int) (|v_ULTIMATE.start_foo_~size#1_101| Int) (|v_ULTIMATE.start_bar_~res~0#1_243| Int)) (and (<= |v_ULTIMATE.start_bar_~res~0#1_243| 2147483647) (<= 0 (+ |v_ULTIMATE.start_bar_~res~0#1_243| 2147483648)) (or (and (= |v_ULTIMATE.start_bar_~res~0#1_243| 0) (= (store |v_#valid_244| |v_ULTIMATE.start_foo_~#a~0#1.base_107| 0) |#valid|) (= |v_ULTIMATE.start_foo_~i~1#1_276| |ULTIMATE.start_main_#t~ret5#1|)) (and (= |ULTIMATE.start_main_#t~ret5#1| |v_ULTIMATE.start_foo_~size#1_101|) (= (store |v_#valid_244| |v_ULTIMATE.start_foo_~#a~0#1.base_107| 0) |#valid|) (not (= |v_ULTIMATE.start_bar_~res~0#1_243| 0)))))) (<= |ULTIMATE.start_main_#t~ret5#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_#t~ret5#1| 2147483648)))' at error location [2024-11-09 06:37:26,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:37:26,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:37:26,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2024-11-09 06:37:26,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689752654] [2024-11-09 06:37:26,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:37:26,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 06:37:26,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:37:26,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 06:37:26,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2024-11-09 06:37:26,563 INFO L87 Difference]: Start difference. First operand 113 states and 120 transitions. Second operand has 17 states, 17 states have (on average 5.823529411764706) internal successors, (99), 16 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 06:37:27,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:37:27,225 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2024-11-09 06:37:27,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 06:37:27,225 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.823529411764706) internal successors, (99), 16 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 99 [2024-11-09 06:37:27,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:37:27,226 INFO L225 Difference]: With dead ends: 120 [2024-11-09 06:37:27,226 INFO L226 Difference]: Without dead ends: 120 [2024-11-09 06:37:27,227 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 272 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 06:37:27,228 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 38 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:37:27,228 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 120 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:37:27,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-09 06:37:27,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2024-11-09 06:37:27,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 115 states have (on average 1.0782608695652174) internal successors, (124), 116 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:37:27,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2024-11-09 06:37:27,232 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 99 [2024-11-09 06:37:27,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:37:27,232 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2024-11-09 06:37:27,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.823529411764706) internal successors, (99), 16 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 06:37:27,233 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2024-11-09 06:37:27,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-09 06:37:27,234 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:37:27,234 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 5, 5, 5, 5, 5, 5, 4, 1, 1] [2024-11-09 06:37:27,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 06:37:27,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-09 06:37:27,435 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:37:27,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:37:27,435 INFO L85 PathProgramCache]: Analyzing trace with hash 919765919, now seen corresponding path program 5 times [2024-11-09 06:37:27,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:37:27,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785936478] [2024-11-09 06:37:27,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:27,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:37:27,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 216 proven. 34 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2024-11-09 06:37:27,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:37:27,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785936478] [2024-11-09 06:37:27,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785936478] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:37:27,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854743521] [2024-11-09 06:37:27,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:37:27,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:27,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:37:27,954 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:37:27,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 06:37:28,290 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 06:37:28,290 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:37:28,294 INFO L255 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 06:37:28,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:37:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 171 proven. 214 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-11-09 06:37:28,644 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:37:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 171 proven. 214 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-11-09 06:37:29,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854743521] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:37:29,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [172169195] [2024-11-09 06:37:29,006 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 06:37:29,006 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:37:29,006 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:37:29,007 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:37:29,007 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:37:34,212 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:37:35,224 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9608#(and (<= |ULTIMATE.start_main_#t~ret5#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_#t~ret5#1| 2147483648)) (exists ((|v_#valid_264| (Array Int Int)) (|v_ULTIMATE.start_foo_~#a~0#1.base_116| Int) (|v_ULTIMATE.start_bar_~res~0#1_272| Int) (|v_ULTIMATE.start_foo_~size#1_110| Int) (|v_ULTIMATE.start_foo_~i~1#1_306| Int)) (and (or (and (= (store |v_#valid_264| |v_ULTIMATE.start_foo_~#a~0#1.base_116| 0) |#valid|) (= |ULTIMATE.start_main_#t~ret5#1| |v_ULTIMATE.start_foo_~size#1_110|) (not (= |v_ULTIMATE.start_bar_~res~0#1_272| 0))) (and (= (store |v_#valid_264| |v_ULTIMATE.start_foo_~#a~0#1.base_116| 0) |#valid|) (= |v_ULTIMATE.start_foo_~i~1#1_306| |ULTIMATE.start_main_#t~ret5#1|) (= |v_ULTIMATE.start_bar_~res~0#1_272| 0))) (<= 0 (+ |v_ULTIMATE.start_bar_~res~0#1_272| 2147483648)) (<= |v_ULTIMATE.start_bar_~res~0#1_272| 2147483647))))' at error location [2024-11-09 06:37:35,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:37:35,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:37:35,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-11-09 06:37:35,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785079325] [2024-11-09 06:37:35,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:37:35,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 06:37:35,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:37:35,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 06:37:35,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2024-11-09 06:37:35,227 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:37:36,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:37:36,787 INFO L93 Difference]: Finished difference Result 138 states and 145 transitions. [2024-11-09 06:37:36,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-09 06:37:36,787 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2024-11-09 06:37:36,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:37:36,788 INFO L225 Difference]: With dead ends: 138 [2024-11-09 06:37:36,789 INFO L226 Difference]: Without dead ends: 138 [2024-11-09 06:37:36,790 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 280 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=609, Invalid=2813, Unknown=0, NotChecked=0, Total=3422 [2024-11-09 06:37:36,791 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 76 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:37:36,792 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 77 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:37:36,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-09 06:37:36,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 123. [2024-11-09 06:37:36,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 121 states have (on average 1.0661157024793388) internal successors, (129), 122 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 06:37:36,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 129 transitions. [2024-11-09 06:37:36,796 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 129 transitions. Word has length 103 [2024-11-09 06:37:36,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:37:36,797 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 129 transitions. [2024-11-09 06:37:36,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:37:36,797 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 129 transitions. [2024-11-09 06:37:36,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-09 06:37:36,799 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:37:36,799 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 4, 1, 1] [2024-11-09 06:37:36,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 06:37:36,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-09 06:37:37,000 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:37:37,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:37:37,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1515825237, now seen corresponding path program 6 times [2024-11-09 06:37:37,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:37:37,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030055475] [2024-11-09 06:37:37,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:37,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:37:37,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:39,147 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 411 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-11-09 06:37:39,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:37:39,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030055475] [2024-11-09 06:37:39,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030055475] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:37:39,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422100286] [2024-11-09 06:37:39,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:37:39,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:39,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:37:39,150 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:37:39,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 06:37:39,682 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:37:39,683 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:37:39,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-09 06:37:39,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:37:39,702 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 06:37:39,709 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 06:37:39,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:37:39,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 06:37:39,789 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 06:37:39,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 06:37:39,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:37:39,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 06:37:39,923 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 06:37:39,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 06:37:40,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:37:40,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 06:37:40,087 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 06:37:40,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 06:37:40,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:37:40,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 06:37:40,293 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 06:37:40,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 06:37:40,541 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 06:37:40,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 06:37:40,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 06:37:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 395 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-09 06:37:40,864 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:37:41,193 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:37:41,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-09 06:37:41,557 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:37:41,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-09 06:37:41,868 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:37:41,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-09 06:37:42,161 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:37:42,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-09 06:37:42,392 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 395 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-09 06:37:42,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422100286] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:37:42,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1756561136] [2024-11-09 06:37:42,394 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 06:37:42,394 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:37:42,394 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:37:42,394 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:37:42,395 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:37:47,614 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:37:49,221 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10604#(and (exists ((|v_#valid_285| (Array Int Int)) (|v_ULTIMATE.start_foo_~i~1#1_336| Int) (|v_ULTIMATE.start_foo_~#a~0#1.base_125| Int) (|v_ULTIMATE.start_foo_~size#1_119| Int) (|v_ULTIMATE.start_bar_~res~0#1_302| Int)) (and (<= 0 (+ |v_ULTIMATE.start_bar_~res~0#1_302| 2147483648)) (<= |v_ULTIMATE.start_bar_~res~0#1_302| 2147483647) (or (and (= |v_ULTIMATE.start_bar_~res~0#1_302| 0) (= |v_ULTIMATE.start_foo_~i~1#1_336| |ULTIMATE.start_main_#t~ret5#1|) (= (store |v_#valid_285| |v_ULTIMATE.start_foo_~#a~0#1.base_125| 0) |#valid|)) (and (= |ULTIMATE.start_main_#t~ret5#1| |v_ULTIMATE.start_foo_~size#1_119|) (= (store |v_#valid_285| |v_ULTIMATE.start_foo_~#a~0#1.base_125| 0) |#valid|) (not (= |v_ULTIMATE.start_bar_~res~0#1_302| 0)))))) (<= |ULTIMATE.start_main_#t~ret5#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_#t~ret5#1| 2147483648)))' at error location [2024-11-09 06:37:49,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:37:49,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:37:49,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 10] total 37 [2024-11-09 06:37:49,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102303241] [2024-11-09 06:37:49,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:37:49,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-09 06:37:49,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:37:49,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-09 06:37:49,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2052, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 06:37:49,226 INFO L87 Difference]: Start difference. First operand 123 states and 129 transitions. Second operand has 39 states, 38 states have (on average 5.2105263157894735) internal successors, (198), 38 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:37:52,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:37:52,175 INFO L93 Difference]: Finished difference Result 335 states and 358 transitions. [2024-11-09 06:37:52,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 06:37:52,176 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 5.2105263157894735) internal successors, (198), 38 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2024-11-09 06:37:52,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:37:52,178 INFO L225 Difference]: With dead ends: 335 [2024-11-09 06:37:52,178 INFO L226 Difference]: Without dead ends: 335 [2024-11-09 06:37:52,180 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=688, Invalid=3344, Unknown=0, NotChecked=0, Total=4032 [2024-11-09 06:37:52,180 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 385 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:37:52,181 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 457 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-09 06:37:52,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2024-11-09 06:37:52,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 332. [2024-11-09 06:37:52,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 330 states have (on average 1.0757575757575757) internal successors, (355), 331 states have internal predecessors, (355), 0 states have call successors, (0), 0 states 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 06:37:52,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 355 transitions. [2024-11-09 06:37:52,190 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 355 transitions. Word has length 106 [2024-11-09 06:37:52,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:37:52,191 INFO L471 AbstractCegarLoop]: Abstraction has 332 states and 355 transitions. [2024-11-09 06:37:52,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 5.2105263157894735) internal successors, (198), 38 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:37:52,191 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 355 transitions. [2024-11-09 06:37:52,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-09 06:37:52,193 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:37:52,193 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:37:52,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-09 06:37:52,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-09 06:37:52,394 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:37:52,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:37:52,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1607327924, now seen corresponding path program 3 times [2024-11-09 06:37:52,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:37:52,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219418222] [2024-11-09 06:37:52,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:52,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:37:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:52,772 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-09 06:37:52,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:37:52,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219418222] [2024-11-09 06:37:52,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219418222] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:37:52,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645411598] [2024-11-09 06:37:52,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:37:52,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:52,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:37:52,777 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:37:52,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 06:37:53,786 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:37:53,786 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:37:53,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 06:37:53,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:37:54,132 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-09 06:37:54,132 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:37:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-09 06:37:54,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645411598] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:37:54,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [804240180] [2024-11-09 06:37:54,590 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 06:37:54,590 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:37:54,590 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:37:54,591 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:37:54,591 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:37:59,846 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:38:01,409 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11998#(and (exists ((|v_ULTIMATE.start_main_old_#valid#1_12| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_12| |#valid|))) (exists ((|v_#memory_int_328| (Array Int (Array Int Int))) (|v_ULTIMATE.start_foo_~size#1_128| Int) (|v_ULTIMATE.start_main_~#b~0#1.base_34| Int) (|v_ULTIMATE.start_foo_~i~1#1_366| Int) (|v_ULTIMATE.start_foo_~#a~0#1.base_134| Int) (|v_ULTIMATE.start_main_~#b~0#1.offset_33| Int) (|v_ULTIMATE.start_main_~i~2#1_175| Int) (|v_ULTIMATE.start_bar_~res~0#1_332| Int) (|v_#valid_307| (Array Int Int)) (|v_#valid_306| (Array Int Int))) (and (<= (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_34|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_33| (- 4) (* |v_ULTIMATE.start_main_~i~2#1_175| 4))) 2147483647) (<= 100 |v_ULTIMATE.start_main_~i~2#1_175|) (or (and (= |v_ULTIMATE.start_bar_~res~0#1_332| 0) (= |v_ULTIMATE.start_foo_~i~1#1_366| (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_34|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_33| (- 4) (* |v_ULTIMATE.start_main_~i~2#1_175| 4)))) (= (store |v_#valid_306| |v_ULTIMATE.start_foo_~#a~0#1.base_134| 0) |v_#valid_307|)) (and (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_34|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_33| (- 4) (* |v_ULTIMATE.start_main_~i~2#1_175| 4))) |v_ULTIMATE.start_foo_~size#1_128|) (not (= |v_ULTIMATE.start_bar_~res~0#1_332| 0)) (= (store |v_#valid_306| |v_ULTIMATE.start_foo_~#a~0#1.base_134| 0) |v_#valid_307|))) (<= |v_ULTIMATE.start_bar_~res~0#1_332| 2147483647) (<= 0 (+ |v_ULTIMATE.start_bar_~res~0#1_332| 2147483648)) (<= 0 (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_34|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_33| (- 4) (* |v_ULTIMATE.start_main_~i~2#1_175| 4))) 2147483648)) (= (store |v_#valid_307| |v_ULTIMATE.start_main_~#b~0#1.base_34| 0) |#valid|) (<= 0 |v_ULTIMATE.start_main_~#b~0#1.offset_33|) (<= (+ |v_ULTIMATE.start_main_~#b~0#1.offset_33| (* |v_ULTIMATE.start_main_~i~2#1_175| 4)) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_34|)) (= (select |v_#valid_307| |v_ULTIMATE.start_main_~#b~0#1.base_34|) 1) (= |#memory_int| (store |v_#memory_int_328| |v_ULTIMATE.start_main_~#b~0#1.base_34| (store (select |v_#memory_int_328| |v_ULTIMATE.start_main_~#b~0#1.base_34|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_33| (- 4) (* |v_ULTIMATE.start_main_~i~2#1_175| 4)) (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_34|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_33| (- 4) (* |v_ULTIMATE.start_main_~i~2#1_175| 4)))))) (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_34|) |v_ULTIMATE.start_main_~#b~0#1.offset_33|) 0)))) (= |ULTIMATE.start_main_#res#1| 1))' at error location [2024-11-09 06:38:01,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:38:01,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:38:01,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-09 06:38:01,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530947505] [2024-11-09 06:38:01,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:38:01,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 06:38:01,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:38:01,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 06:38:01,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=689, Unknown=2, NotChecked=0, Total=870 [2024-11-09 06:38:01,413 INFO L87 Difference]: Start difference. First operand 332 states and 355 transitions. Second operand has 15 states, 15 states have (on average 9.6) internal successors, (144), 14 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:01,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:38:01,611 INFO L93 Difference]: Finished difference Result 368 states and 389 transitions. [2024-11-09 06:38:01,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 06:38:01,612 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.6) internal successors, (144), 14 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2024-11-09 06:38:01,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:38:01,613 INFO L225 Difference]: With dead ends: 368 [2024-11-09 06:38:01,613 INFO L226 Difference]: Without dead ends: 368 [2024-11-09 06:38:01,614 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=179, Invalid=689, Unknown=2, NotChecked=0, Total=870 [2024-11-09 06:38:01,614 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:38:01,615 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 110 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:38:01,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2024-11-09 06:38:01,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 368. [2024-11-09 06:38:01,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 366 states have (on average 1.0628415300546448) internal successors, (389), 367 states have internal predecessors, (389), 0 states have call successors, (0), 0 states 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 06:38:01,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 389 transitions. [2024-11-09 06:38:01,625 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 389 transitions. Word has length 113 [2024-11-09 06:38:01,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:38:01,625 INFO L471 AbstractCegarLoop]: Abstraction has 368 states and 389 transitions. [2024-11-09 06:38:01,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.6) internal successors, (144), 14 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:38:01,626 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 389 transitions. [2024-11-09 06:38:01,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2024-11-09 06:38:01,632 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:38:01,632 INFO L215 NwaCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 11, 11, 11, 11, 11, 11, 10, 1, 1] [2024-11-09 06:38:01,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-09 06:38:01,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-09 06:38:01,833 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:38:01,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:38:01,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1234465355, now seen corresponding path program 7 times [2024-11-09 06:38:01,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:38:01,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60756220] [2024-11-09 06:38:01,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:01,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:38:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5060 backedges. 1880 proven. 123 refuted. 0 times theorem prover too weak. 3057 trivial. 0 not checked. [2024-11-09 06:38:03,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:38:03,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60756220] [2024-11-09 06:38:03,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60756220] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:38:03,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392168408] [2024-11-09 06:38:03,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:38:03,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:03,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:38:03,626 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:38:03,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 06:38:04,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:04,286 INFO L255 TraceCheckSpWp]: Trace formula consists of 1700 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 06:38:04,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:38:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5060 backedges. 2825 proven. 223 refuted. 0 times theorem prover too weak. 2012 trivial. 0 not checked. [2024-11-09 06:38:04,837 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:38:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5060 backedges. 2825 proven. 223 refuted. 0 times theorem prover too weak. 2012 trivial. 0 not checked. [2024-11-09 06:38:05,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392168408] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:38:05,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [615213528] [2024-11-09 06:38:05,338 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 06:38:05,338 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:38:05,339 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:38:05,339 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:38:05,339 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:38:11,489 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:38:12,488 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14662#(and (exists ((|v_ULTIMATE.start_foo_~#a~0#1.base_149| Int) (|v_ULTIMATE.start_bar_~res~0#1_392| Int) (|v_ULTIMATE.start_foo_~i~1#1_430| Int) (|v_#valid_339| (Array Int Int)) (|v_ULTIMATE.start_foo_~size#1_143| Int)) (and (<= 0 (+ |v_ULTIMATE.start_bar_~res~0#1_392| 2147483648)) (or (and (= (store |v_#valid_339| |v_ULTIMATE.start_foo_~#a~0#1.base_149| 0) |#valid|) (= |ULTIMATE.start_main_#t~ret5#1| |v_ULTIMATE.start_foo_~size#1_143|) (not (= |v_ULTIMATE.start_bar_~res~0#1_392| 0))) (and (= (store |v_#valid_339| |v_ULTIMATE.start_foo_~#a~0#1.base_149| 0) |#valid|) (= |v_ULTIMATE.start_foo_~i~1#1_430| |ULTIMATE.start_main_#t~ret5#1|) (= |v_ULTIMATE.start_bar_~res~0#1_392| 0))) (<= |v_ULTIMATE.start_bar_~res~0#1_392| 2147483647))) (<= |ULTIMATE.start_main_#t~ret5#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_#t~ret5#1| 2147483648)))' at error location [2024-11-09 06:38:12,488 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:38:12,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:38:12,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 23 [2024-11-09 06:38:12,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035424054] [2024-11-09 06:38:12,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:38:12,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 06:38:12,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:38:12,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 06:38:12,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 06:38:12,492 INFO L87 Difference]: Start difference. First operand 368 states and 389 transitions. Second operand has 23 states, 23 states have (on average 6.521739130434782) internal successors, (150), 23 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 06:38:14,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:38:14,512 INFO L93 Difference]: Finished difference Result 471 states and 495 transitions. [2024-11-09 06:38:14,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-09 06:38:14,513 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.521739130434782) internal successors, (150), 23 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) Word has length 316 [2024-11-09 06:38:14,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:38:14,515 INFO L225 Difference]: With dead ends: 471 [2024-11-09 06:38:14,515 INFO L226 Difference]: Without dead ends: 471 [2024-11-09 06:38:14,516 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 918 SyntacticMatches, 10 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=453, Invalid=2517, Unknown=0, NotChecked=0, Total=2970 [2024-11-09 06:38:14,517 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 69 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:38:14,517 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 181 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 06:38:14,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2024-11-09 06:38:14,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 414. [2024-11-09 06:38:14,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 412 states have (on average 1.058252427184466) internal successors, (436), 413 states have internal predecessors, (436), 0 states have call successors, (0), 0 states 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 06:38:14,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 436 transitions. [2024-11-09 06:38:14,530 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 436 transitions. Word has length 316 [2024-11-09 06:38:14,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:38:14,530 INFO L471 AbstractCegarLoop]: Abstraction has 414 states and 436 transitions. [2024-11-09 06:38:14,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.521739130434782) internal successors, (150), 23 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 06:38:14,531 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 436 transitions. [2024-11-09 06:38:14,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2024-11-09 06:38:14,538 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:38:14,538 INFO L215 NwaCegarLoop]: trace histogram [40, 40, 40, 40, 34, 34, 34, 11, 11, 11, 11, 11, 11, 10, 1, 1] [2024-11-09 06:38:14,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-09 06:38:14,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 06:38:14,739 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:38:14,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:38:14,740 INFO L85 PathProgramCache]: Analyzing trace with hash -2089052245, now seen corresponding path program 8 times [2024-11-09 06:38:14,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:38:14,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653768068] [2024-11-09 06:38:14,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:14,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:38:14,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:16,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6002 backedges. 3592 proven. 200 refuted. 0 times theorem prover too weak. 2210 trivial. 0 not checked. [2024-11-09 06:38:16,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:38:16,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653768068] [2024-11-09 06:38:16,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653768068] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:38:16,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845068326] [2024-11-09 06:38:16,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:38:16,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:16,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:38:16,576 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:38:16,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 06:38:17,233 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 06:38:17,234 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:38:17,240 INFO L255 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 06:38:17,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:38:18,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6002 backedges. 1066 proven. 3651 refuted. 0 times theorem prover too weak. 1285 trivial. 0 not checked. [2024-11-09 06:38:18,323 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:38:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6002 backedges. 1066 proven. 3651 refuted. 0 times theorem prover too weak. 1285 trivial. 0 not checked. [2024-11-09 06:38:19,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845068326] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:38:19,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1970741870] [2024-11-09 06:38:19,318 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 06:38:19,318 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:38:19,319 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:38:19,319 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:38:19,319 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:38:24,882 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:38:26,009 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17662#(and (exists ((|v_#valid_371| (Array Int Int)) (|v_ULTIMATE.start_foo_~size#1_158| Int) (|v_ULTIMATE.start_foo_~i~1#1_496| Int) (|v_ULTIMATE.start_foo_~#a~0#1.base_164| Int) (|v_ULTIMATE.start_bar_~res~0#1_452| Int)) (and (or (and (= |v_ULTIMATE.start_bar_~res~0#1_452| 0) (= |v_ULTIMATE.start_foo_~i~1#1_496| |ULTIMATE.start_main_#t~ret5#1|) (= (store |v_#valid_371| |v_ULTIMATE.start_foo_~#a~0#1.base_164| 0) |#valid|)) (and (= |ULTIMATE.start_main_#t~ret5#1| |v_ULTIMATE.start_foo_~size#1_158|) (not (= |v_ULTIMATE.start_bar_~res~0#1_452| 0)) (= (store |v_#valid_371| |v_ULTIMATE.start_foo_~#a~0#1.base_164| 0) |#valid|))) (<= 0 (+ |v_ULTIMATE.start_bar_~res~0#1_452| 2147483648)) (<= |v_ULTIMATE.start_bar_~res~0#1_452| 2147483647))) (<= |ULTIMATE.start_main_#t~ret5#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_#t~ret5#1| 2147483648)))' at error location [2024-11-09 06:38:26,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:38:26,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:38:26,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2024-11-09 06:38:26,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296065337] [2024-11-09 06:38:26,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:38:26,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-09 06:38:26,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:38:26,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-09 06:38:26,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 06:38:26,012 INFO L87 Difference]: Start difference. First operand 414 states and 436 transitions. Second operand has 27 states, 27 states have (on average 6.148148148148148) internal successors, (166), 26 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 06:38:27,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:38:27,526 INFO L93 Difference]: Finished difference Result 449 states and 471 transitions. [2024-11-09 06:38:27,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 06:38:27,527 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.148148148148148) internal successors, (166), 26 states have internal predecessors, (166), 0 states have call successors, (0), 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 340 [2024-11-09 06:38:27,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:38:27,528 INFO L225 Difference]: With dead ends: 449 [2024-11-09 06:38:27,528 INFO L226 Difference]: Without dead ends: 449 [2024-11-09 06:38:27,530 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1049 GetRequests, 991 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=467, Invalid=2395, Unknown=0, NotChecked=0, Total=2862 [2024-11-09 06:38:27,531 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 56 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:38:27,531 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 257 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 06:38:27,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2024-11-09 06:38:27,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 435. [2024-11-09 06:38:27,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 433 states have (on average 1.0554272517321017) internal successors, (457), 434 states have internal predecessors, (457), 0 states have call successors, (0), 0 states 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 06:38:27,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 457 transitions. [2024-11-09 06:38:27,543 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 457 transitions. Word has length 340 [2024-11-09 06:38:27,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:38:27,543 INFO L471 AbstractCegarLoop]: Abstraction has 435 states and 457 transitions. [2024-11-09 06:38:27,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.148148148148148) internal successors, (166), 26 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 06:38:27,544 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 457 transitions. [2024-11-09 06:38:27,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2024-11-09 06:38:27,552 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:38:27,552 INFO L215 NwaCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 11, 11, 11, 11, 11, 11, 10, 1, 1] [2024-11-09 06:38:27,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-09 06:38:27,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 06:38:27,753 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:38:27,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:38:27,754 INFO L85 PathProgramCache]: Analyzing trace with hash -152383645, now seen corresponding path program 9 times [2024-11-09 06:38:27,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:38:27,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95493190] [2024-11-09 06:38:27,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:27,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:38:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6725 backedges. 4645 proven. 358 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2024-11-09 06:38:29,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:38:29,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95493190] [2024-11-09 06:38:29,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95493190] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:38:29,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112676150] [2024-11-09 06:38:29,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:38:29,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:29,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:38:29,752 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:38:29,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b44e200-27b4-4135-9800-e609f4f028dd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process