./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/diff-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/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_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/diff-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/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_84edd00a-a368-418b-a562-0930783b6ded/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 5cc33a4b6801f9f06dbbb17ff694aba4439c76c6a2b62ec290c2132cc01ea0fe --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 01:17:49,326 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 01:17:49,454 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-09 01:17:49,462 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 01:17:49,462 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 01:17:49,505 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 01:17:49,506 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 01:17:49,507 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 01:17:49,508 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 01:17:49,509 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 01:17:49,510 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 01:17:49,510 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 01:17:49,512 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 01:17:49,512 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 01:17:49,515 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 01:17:49,515 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 01:17:49,516 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 01:17:49,516 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 01:17:49,516 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 01:17:49,517 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 01:17:49,517 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 01:17:49,522 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 01:17:49,522 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 01:17:49,523 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 01:17:49,523 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 01:17:49,523 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 01:17:49,524 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 01:17:49,524 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 01:17:49,524 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 01:17:49,525 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 01:17:49,525 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 01:17:49,525 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 01:17:49,528 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 01:17:49,529 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 01:17:49,529 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 01:17:49,529 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 01:17:49,530 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 01:17:49,531 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 01:17:49,531 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 01:17:49,532 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 01:17:49,532 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 01:17:49,533 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:17:49,533 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 01:17:49,534 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 01:17:49,534 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 01:17:49,535 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 01:17:49,535 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 01:17:49,535 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 01:17:49,535 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 01:17:49,536 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_84edd00a-a368-418b-a562-0930783b6ded/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cc33a4b6801f9f06dbbb17ff694aba4439c76c6a2b62ec290c2132cc01ea0fe [2024-11-09 01:17:49,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 01:17:49,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 01:17:49,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 01:17:49,929 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 01:17:49,930 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 01:17:49,931 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-memsafety/diff-alloca-2.i Unable to find full path for "g++" [2024-11-09 01:17:52,309 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 01:17:52,676 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 01:17:52,677 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/sv-benchmarks/c/array-memsafety/diff-alloca-2.i [2024-11-09 01:17:52,705 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/data/eed66a0c0/8ce2eeba8de14461ae1a394a0b9e45b5/FLAG72fe01cca [2024-11-09 01:17:52,923 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/data/eed66a0c0/8ce2eeba8de14461ae1a394a0b9e45b5 [2024-11-09 01:17:52,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 01:17:52,931 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 01:17:52,939 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 01:17:52,939 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 01:17:52,955 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 01:17:52,956 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:17:52" (1/1) ... [2024-11-09 01:17:52,957 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57f7c908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:52, skipping insertion in model container [2024-11-09 01:17:52,958 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:17:52" (1/1) ... [2024-11-09 01:17:53,012 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 01:17:53,416 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 01:17:53,417 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 01:17:53,418 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 01:17:53,422 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:17:53,436 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 01:17:53,524 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:17:53,571 INFO L204 MainTranslator]: Completed translation [2024-11-09 01:17:53,571 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:53 WrapperNode [2024-11-09 01:17:53,572 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 01:17:53,573 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 01:17:53,574 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 01:17:53,574 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 01:17:53,584 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:53" (1/1) ... [2024-11-09 01:17:53,599 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:53" (1/1) ... [2024-11-09 01:17:53,625 INFO L138 Inliner]: procedures = 116, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 101 [2024-11-09 01:17:53,626 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 01:17:53,627 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 01:17:53,627 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 01:17:53,627 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 01:17:53,638 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:53" (1/1) ... [2024-11-09 01:17:53,639 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:53" (1/1) ... [2024-11-09 01:17:53,643 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:53" (1/1) ... [2024-11-09 01:17:53,643 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:53" (1/1) ... [2024-11-09 01:17:53,651 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:53" (1/1) ... [2024-11-09 01:17:53,655 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:53" (1/1) ... [2024-11-09 01:17:53,657 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:53" (1/1) ... [2024-11-09 01:17:53,658 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:53" (1/1) ... [2024-11-09 01:17:53,661 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 01:17:53,662 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 01:17:53,663 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 01:17:53,663 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 01:17:53,664 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:53" (1/1) ... [2024-11-09 01:17:53,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:17:53,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:17:53,713 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 01:17:53,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 01:17:53,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 01:17:53,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 01:17:53,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 01:17:53,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 01:17:53,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 01:17:53,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 01:17:53,879 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 01:17:53,882 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 01:17:54,268 INFO L? ?]: Removed 64 outVars from TransFormulas that were not future-live. [2024-11-09 01:17:54,268 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 01:17:54,353 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 01:17:54,354 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 01:17:54,354 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:17:54 BoogieIcfgContainer [2024-11-09 01:17:54,354 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 01:17:54,357 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 01:17:54,357 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 01:17:54,362 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 01:17:54,362 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 01:17:52" (1/3) ... [2024-11-09 01:17:54,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d79fc2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:17:54, skipping insertion in model container [2024-11-09 01:17:54,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:17:53" (2/3) ... [2024-11-09 01:17:54,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d79fc2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:17:54, skipping insertion in model container [2024-11-09 01:17:54,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:17:54" (3/3) ... [2024-11-09 01:17:54,365 INFO L112 eAbstractionObserver]: Analyzing ICFG diff-alloca-2.i [2024-11-09 01:17:54,388 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 01:17:54,389 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2024-11-09 01:17:54,448 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 01:17:54,457 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;@76dcaf9d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 01:17:54,457 INFO L334 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-11-09 01:17:54,462 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:17:54,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-09 01:17:54,473 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:17:54,473 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-09 01:17:54,474 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:17:54,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:17:54,482 INFO L85 PathProgramCache]: Analyzing trace with hash 4398306, now seen corresponding path program 1 times [2024-11-09 01:17:54,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:17:54,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542231150] [2024-11-09 01:17:54,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:54,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:17:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:55,108 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 01:17:55,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:17:55,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542231150] [2024-11-09 01:17:55,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542231150] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:17:55,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:17:55,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 01:17:55,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537398605] [2024-11-09 01:17:55,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:17:55,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:17:55,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:17:55,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:17:55,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:17:55,152 INFO L87 Difference]: Start difference. First operand has 35 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:17:55,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:17:55,237 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2024-11-09 01:17:55,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:17:55,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-09 01:17:55,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:17:55,250 INFO L225 Difference]: With dead ends: 34 [2024-11-09 01:17:55,250 INFO L226 Difference]: Without dead ends: 33 [2024-11-09 01:17:55,252 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:17:55,257 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 11 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:17:55,258 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 48 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:17:55,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-09 01:17:55,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-09 01:17:55,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:17:55,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2024-11-09 01:17:55,296 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 4 [2024-11-09 01:17:55,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:17:55,297 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2024-11-09 01:17:55,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:17:55,298 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2024-11-09 01:17:55,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-09 01:17:55,298 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:17:55,298 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-09 01:17:55,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 01:17:55,299 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:17:55,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:17:55,300 INFO L85 PathProgramCache]: Analyzing trace with hash 4398307, now seen corresponding path program 1 times [2024-11-09 01:17:55,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:17:55,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545212602] [2024-11-09 01:17:55,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:55,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:17:55,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:55,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:17:55,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:17:55,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545212602] [2024-11-09 01:17:55,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545212602] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:17:55,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:17:55,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 01:17:55,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776102327] [2024-11-09 01:17:55,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:17:55,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 01:17:55,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:17:55,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 01:17:55,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 01:17:55,935 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:17:56,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:17:56,086 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2024-11-09 01:17:56,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 01:17:56,087 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-09 01:17:56,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:17:56,088 INFO L225 Difference]: With dead ends: 33 [2024-11-09 01:17:56,089 INFO L226 Difference]: Without dead ends: 33 [2024-11-09 01:17:56,090 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 01:17:56,092 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:17:56,092 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 97 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:17:56,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-09 01:17:56,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-09 01:17:56,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:17:56,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-11-09 01:17:56,105 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 4 [2024-11-09 01:17:56,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:17:56,106 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-11-09 01:17:56,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:17:56,107 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-11-09 01:17:56,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 01:17:56,108 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:17:56,108 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:17:56,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 01:17:56,109 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:17:56,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:17:56,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1974618833, now seen corresponding path program 1 times [2024-11-09 01:17:56,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:17:56,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710776261] [2024-11-09 01:17:56,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:56,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:17:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 01:17:56,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:17:56,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710776261] [2024-11-09 01:17:56,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710776261] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:17:56,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:17:56,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 01:17:56,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796339473] [2024-11-09 01:17:56,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:17:56,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:17:56,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:17:56,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:17:56,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:17:56,292 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:17:56,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:17:56,346 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2024-11-09 01:17:56,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:17:56,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-09 01:17:56,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:17:56,350 INFO L225 Difference]: With dead ends: 32 [2024-11-09 01:17:56,350 INFO L226 Difference]: Without dead ends: 32 [2024-11-09 01:17:56,350 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:17:56,353 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:17:56,356 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 46 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:17:56,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-09 01:17:56,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-09 01:17:56,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:17:56,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2024-11-09 01:17:56,364 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 9 [2024-11-09 01:17:56,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:17:56,366 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2024-11-09 01:17:56,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:17:56,366 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2024-11-09 01:17:56,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 01:17:56,368 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:17:56,369 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:17:56,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 01:17:56,369 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:17:56,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:17:56,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1974618832, now seen corresponding path program 1 times [2024-11-09 01:17:56,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:17:56,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441434333] [2024-11-09 01:17:56,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:56,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:17:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 01:17:56,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:17:56,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441434333] [2024-11-09 01:17:56,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441434333] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:17:56,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:17:56,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 01:17:56,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446230403] [2024-11-09 01:17:56,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:17:56,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 01:17:56,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:17:56,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 01:17:56,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:17:56,850 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:17:56,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:17:56,969 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2024-11-09 01:17:56,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:17:56,970 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-09 01:17:56,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:17:56,972 INFO L225 Difference]: With dead ends: 35 [2024-11-09 01:17:56,972 INFO L226 Difference]: Without dead ends: 35 [2024-11-09 01:17:56,973 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:17:56,974 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:17:56,975 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 67 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:17:56,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-09 01:17:56,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-09 01:17:56,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.76) internal successors, (44), 34 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:17:56,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2024-11-09 01:17:56,981 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 9 [2024-11-09 01:17:56,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:17:56,981 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2024-11-09 01:17:56,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:17:56,981 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2024-11-09 01:17:56,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 01:17:56,982 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:17:56,982 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:17:56,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 01:17:56,983 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:17:56,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:17:56,984 INFO L85 PathProgramCache]: Analyzing trace with hash 777299435, now seen corresponding path program 1 times [2024-11-09 01:17:56,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:17:56,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427751211] [2024-11-09 01:17:56,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:56,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:17:57,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:17:57,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:17:57,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427751211] [2024-11-09 01:17:57,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427751211] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:17:57,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867333963] [2024-11-09 01:17:57,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:57,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:17:57,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:17:57,143 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:17:57,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 01:17:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:57,286 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 01:17:57,293 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:17:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:17:57,378 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:17:57,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:17:57,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867333963] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:17:57,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [948928226] [2024-11-09 01:17:57,484 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 01:17:57,484 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:17:57,492 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:17:57,501 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:17:57,502 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:17:59,997 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:18:00,747 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '391#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_old_#valid#1_16| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_16| |#valid|))) (exists ((|v_ULTIMATE.start_main_#t~malloc12#1.base_18| Int) (|v_ULTIMATE.start_main_#t~malloc10#1.base_18| Int) (|v_#valid_47| (Array Int Int)) (|v_ULTIMATE.start_main_#t~malloc11#1.base_18| Int)) (and (<= 2 |v_ULTIMATE.start_main_#t~malloc10#1.base_18|) (<= 2 |v_ULTIMATE.start_main_#t~malloc12#1.base_18|) (= (store (store (store |v_#valid_47| |v_ULTIMATE.start_main_#t~malloc10#1.base_18| 0) |v_ULTIMATE.start_main_#t~malloc11#1.base_18| 0) |v_ULTIMATE.start_main_#t~malloc12#1.base_18| 0) |#valid|) (<= 2 |v_ULTIMATE.start_main_#t~malloc11#1.base_18|))) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-09 01:18:00,747 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:18:00,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:18:00,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-09 01:18:00,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031436785] [2024-11-09 01:18:00,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:18:00,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 01:18:00,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:18:00,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 01:18:00,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2024-11-09 01:18:00,751 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:00,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:18:00,893 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2024-11-09 01:18:00,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 01:18:00,893 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-09 01:18:00,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:18:00,894 INFO L225 Difference]: With dead ends: 51 [2024-11-09 01:18:00,895 INFO L226 Difference]: Without dead ends: 51 [2024-11-09 01:18:00,895 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2024-11-09 01:18:00,900 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 78 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:18:00,901 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 75 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:18:00,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-09 01:18:00,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2024-11-09 01:18:00,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 35 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:00,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2024-11-09 01:18:00,909 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 11 [2024-11-09 01:18:00,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:18:00,909 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2024-11-09 01:18:00,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:00,909 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2024-11-09 01:18:00,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-09 01:18:00,910 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:18:00,910 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:18:00,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 01:18:01,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:01,121 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:18:01,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:18:01,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1995684934, now seen corresponding path program 1 times [2024-11-09 01:18:01,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:18:01,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347320832] [2024-11-09 01:18:01,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:01,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:18:01,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:01,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 01:18:01,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:18:01,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347320832] [2024-11-09 01:18:01,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347320832] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:18:01,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902551394] [2024-11-09 01:18:01,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:01,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:01,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:18:01,774 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:18:01,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 01:18:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:01,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 01:18:01,886 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:18:01,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:18:01,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2024-11-09 01:18:01,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:18:01,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:18:01,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 01:18:01,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:18:01,999 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 01:18:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 01:18:02,381 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:18:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 01:18:02,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902551394] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:18:02,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1775153444] [2024-11-09 01:18:02,638 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 01:18:02,638 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:18:02,638 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:18:02,639 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:18:02,639 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:18:04,313 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:18:05,246 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '570#(and (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet15#1|)) (exists ((|v_ULTIMATE.start_main_~B~0#1.base_23| Int) (|v_ULTIMATE.start_main_~i~2#1_36| Int) (|v_ULTIMATE.start_main_~B~0#1.offset_22| Int)) (and (<= 1 |#StackHeapBarrier|) (<= (select |#length| |v_ULTIMATE.start_main_~B~0#1.base_23|) (+ (* |v_ULTIMATE.start_main_~i~2#1_36| 4) 3)) (= |ULTIMATE.start_main_~D~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_~D~0#1.base|) (= |ULTIMATE.start_main_~A~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |v_ULTIMATE.start_main_~i~2#1_36|) (<= 2 |ULTIMATE.start_main_~A~0#1.base|) (= |v_ULTIMATE.start_main_~B~0#1.offset_22| 0) (<= 2 |v_ULTIMATE.start_main_~B~0#1.base_23|) (<= (+ |v_ULTIMATE.start_main_~i~2#1_36| 1) |ULTIMATE.start_main_~Blen~0#1|))) (<= |ULTIMATE.start_main_#t~nondet15#1| 2147483647))' at error location [2024-11-09 01:18:05,246 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:18:05,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:18:05,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2024-11-09 01:18:05,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820534345] [2024-11-09 01:18:05,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:18:05,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 01:18:05,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:18:05,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 01:18:05,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2024-11-09 01:18:05,251 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 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 01:18:05,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:18:05,586 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2024-11-09 01:18:05,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 01:18:05,590 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 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 12 [2024-11-09 01:18:05,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:18:05,591 INFO L225 Difference]: With dead ends: 38 [2024-11-09 01:18:05,591 INFO L226 Difference]: Without dead ends: 38 [2024-11-09 01:18:05,592 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2024-11-09 01:18:05,592 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 30 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:18:05,593 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 134 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:18:05,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-09 01:18:05,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2024-11-09 01:18:05,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:05,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2024-11-09 01:18:05,604 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 12 [2024-11-09 01:18:05,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:18:05,604 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2024-11-09 01:18:05,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 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 01:18:05,604 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2024-11-09 01:18:05,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-09 01:18:05,605 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:18:05,605 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:18:05,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 01:18:05,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:05,807 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:18:05,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:18:05,808 INFO L85 PathProgramCache]: Analyzing trace with hash 831886143, now seen corresponding path program 1 times [2024-11-09 01:18:05,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:18:05,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951261342] [2024-11-09 01:18:05,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:05,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:18:05,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:05,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 01:18:05,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:18:05,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951261342] [2024-11-09 01:18:05,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951261342] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:18:05,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:18:05,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 01:18:05,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844014528] [2024-11-09 01:18:05,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:18:05,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:18:05,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:18:05,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:18:05,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 01:18:05,900 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:05,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:18:05,951 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2024-11-09 01:18:05,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 01:18:05,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-09 01:18:05,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:18:05,952 INFO L225 Difference]: With dead ends: 31 [2024-11-09 01:18:05,953 INFO L226 Difference]: Without dead ends: 31 [2024-11-09 01:18:05,953 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 01:18:05,954 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:18:05,954 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 39 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:18:05,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-09 01:18:05,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-09 01:18:05,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.5) internal successors, (36), 30 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 01:18:05,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2024-11-09 01:18:05,963 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 16 [2024-11-09 01:18:05,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:18:05,964 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2024-11-09 01:18:05,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:05,964 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2024-11-09 01:18:05,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-09 01:18:05,965 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:18:05,966 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:18:05,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 01:18:05,967 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:18:05,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:18:05,967 INFO L85 PathProgramCache]: Analyzing trace with hash 831886144, now seen corresponding path program 1 times [2024-11-09 01:18:05,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:18:05,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925973024] [2024-11-09 01:18:05,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:05,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:18:05,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:06,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 01:18:06,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:18:06,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925973024] [2024-11-09 01:18:06,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925973024] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:18:06,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348491016] [2024-11-09 01:18:06,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:06,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:06,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:18:06,179 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:18:06,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 01:18:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:06,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 01:18:06,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:18:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 01:18:06,391 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:18:06,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 01:18:06,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348491016] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:18:06,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1493985627] [2024-11-09 01:18:06,479 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-09 01:18:06,479 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:18:06,480 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:18:06,480 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:18:06,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:18:07,875 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:18:09,065 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '821#(and (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_diff_~k~0#1| 0) (exists ((|v_ULTIMATE.start_diff_~A#1.base_14| Int)) (and (<= 2 |v_ULTIMATE.start_diff_~A#1.base_14|) (<= (select |#length| |v_ULTIMATE.start_diff_~A#1.base_14|) 3))) (<= |ULTIMATE.start_diff_~l2~0#1| 0) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (= |ULTIMATE.start_diff_~D#1.offset| 0) (<= 2 |ULTIMATE.start_diff_~B#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_diff_~D#1.base|))' at error location [2024-11-09 01:18:09,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:18:09,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:18:09,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6, 6] total 10 [2024-11-09 01:18:09,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849045832] [2024-11-09 01:18:09,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:18:09,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 01:18:09,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:18:09,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 01:18:09,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2024-11-09 01:18:09,072 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:09,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:18:09,473 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2024-11-09 01:18:09,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 01:18:09,474 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-09 01:18:09,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:18:09,475 INFO L225 Difference]: With dead ends: 55 [2024-11-09 01:18:09,475 INFO L226 Difference]: Without dead ends: 55 [2024-11-09 01:18:09,476 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2024-11-09 01:18:09,477 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 95 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:18:09,478 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 59 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:18:09,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-09 01:18:09,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2024-11-09 01:18:09,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 39 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:09,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-11-09 01:18:09,483 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 16 [2024-11-09 01:18:09,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:18:09,484 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-11-09 01:18:09,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:09,484 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-11-09 01:18:09,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 01:18:09,485 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:18:09,485 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:18:09,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 01:18:09,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-09 01:18:09,687 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:18:09,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:18:09,688 INFO L85 PathProgramCache]: Analyzing trace with hash 18082813, now seen corresponding path program 1 times [2024-11-09 01:18:09,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:18:09,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301270398] [2024-11-09 01:18:09,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:09,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:18:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 01:18:09,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:18:09,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301270398] [2024-11-09 01:18:09,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301270398] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:18:09,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:18:09,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 01:18:09,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005197205] [2024-11-09 01:18:09,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:18:09,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:18:09,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:18:09,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:18:09,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 01:18:09,794 INFO L87 Difference]: Start difference. First operand 40 states and 48 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 01:18:09,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:18:09,841 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2024-11-09 01:18:09,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 01:18:09,842 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 17 [2024-11-09 01:18:09,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:18:09,842 INFO L225 Difference]: With dead ends: 39 [2024-11-09 01:18:09,842 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 01:18:09,843 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 01:18:09,844 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:18:09,844 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 39 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:18:09,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 01:18:09,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-09 01:18:09,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.393939393939394) internal successors, (46), 38 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:09,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2024-11-09 01:18:09,854 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 17 [2024-11-09 01:18:09,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:18:09,854 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2024-11-09 01:18:09,855 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 01:18:09,855 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2024-11-09 01:18:09,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 01:18:09,858 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:18:09,858 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:18:09,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 01:18:09,859 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:18:09,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:18:09,860 INFO L85 PathProgramCache]: Analyzing trace with hash 18082814, now seen corresponding path program 1 times [2024-11-09 01:18:09,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:18:09,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027059760] [2024-11-09 01:18:09,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:09,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:18:09,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 01:18:10,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:18:10,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027059760] [2024-11-09 01:18:10,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027059760] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:18:10,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284780009] [2024-11-09 01:18:10,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:10,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:10,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:18:10,040 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:18:10,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 01:18:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:10,152 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 01:18:10,154 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:18:10,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 01:18:10,253 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:18:10,328 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 01:18:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 01:18:10,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284780009] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:18:10,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [608690438] [2024-11-09 01:18:10,365 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 01:18:10,365 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:18:10,365 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:18:10,366 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:18:10,366 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:18:11,814 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:18:13,246 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1131#(and (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (<= (+ |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (= |ULTIMATE.start_diff_~k~0#1| 0) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= |ULTIMATE.start_diff_~found~0#1| 0) (exists ((|v_ULTIMATE.start_diff_~B#1.offset_13| Int) (|v_ULTIMATE.start_main_~i~2#1_51| Int) (|v_ULTIMATE.start_diff_~B#1.base_14| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_diff_~A#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (= |ULTIMATE.start_diff_~D#1.offset| 0) (= |v_ULTIMATE.start_diff_~B#1.offset_13| 0) (<= 2 |v_ULTIMATE.start_diff_~B#1.base_14|) (<= (select |#length| |v_ULTIMATE.start_diff_~B#1.base_14|) 3) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (= |ULTIMATE.start_diff_~A#1.offset| 0) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_main_~i~2#1_51|) (<= 2 |ULTIMATE.start_diff_~D#1.base|))) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |ULTIMATE.start_diff_#t~mem2#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) |ULTIMATE.start_diff_~A#1.offset|)))' at error location [2024-11-09 01:18:13,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:18:13,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:18:13,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-11-09 01:18:13,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022104095] [2024-11-09 01:18:13,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:18:13,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 01:18:13,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:18:13,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 01:18:13,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-11-09 01:18:13,249 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:13,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:18:13,401 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2024-11-09 01:18:13,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 01:18:13,402 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-09 01:18:13,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:18:13,403 INFO L225 Difference]: With dead ends: 48 [2024-11-09 01:18:13,403 INFO L226 Difference]: Without dead ends: 48 [2024-11-09 01:18:13,403 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2024-11-09 01:18:13,404 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:18:13,405 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 75 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:18:13,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-09 01:18:13,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2024-11-09 01:18:13,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.358974358974359) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:13,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2024-11-09 01:18:13,409 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 17 [2024-11-09 01:18:13,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:18:13,409 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2024-11-09 01:18:13,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:13,410 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2024-11-09 01:18:13,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 01:18:13,411 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:18:13,411 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:18:13,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 01:18:13,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 01:18:13,615 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:18:13,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:18:13,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1065059598, now seen corresponding path program 1 times [2024-11-09 01:18:13,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:18:13,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137115289] [2024-11-09 01:18:13,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:13,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:18:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 01:18:13,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:18:13,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137115289] [2024-11-09 01:18:13,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137115289] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:18:13,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061977345] [2024-11-09 01:18:13,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:13,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:13,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:18:13,946 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:18:13,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 01:18:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:14,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 01:18:14,069 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:18:14,081 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 01:18:14,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:18:14,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-09 01:18:14,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:18:14,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-09 01:18:14,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:18:14,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-09 01:18:14,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:18:14,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-09 01:18:14,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:18:14,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-09 01:18:14,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 01:18:14,183 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:18:14,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061977345] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:18:14,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:18:14,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2024-11-09 01:18:14,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584187227] [2024-11-09 01:18:14,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:18:14,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:18:14,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:18:14,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:18:14,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:18:14,185 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 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 01:18:14,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:18:14,215 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2024-11-09 01:18:14,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 01:18:14,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 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 21 [2024-11-09 01:18:14,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:18:14,216 INFO L225 Difference]: With dead ends: 44 [2024-11-09 01:18:14,216 INFO L226 Difference]: Without dead ends: 44 [2024-11-09 01:18:14,217 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:18:14,217 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:18:14,218 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:18:14,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-09 01:18:14,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-11-09 01:18:14,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:14,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2024-11-09 01:18:14,222 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 21 [2024-11-09 01:18:14,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:18:14,222 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2024-11-09 01:18:14,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 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 01:18:14,223 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2024-11-09 01:18:14,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 01:18:14,224 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:18:14,224 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:18:14,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 01:18:14,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 01:18:14,428 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:18:14,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:18:14,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1065059599, now seen corresponding path program 1 times [2024-11-09 01:18:14,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:18:14,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489855025] [2024-11-09 01:18:14,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:14,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:18:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 01:18:14,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:18:14,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489855025] [2024-11-09 01:18:14,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489855025] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:18:14,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339490132] [2024-11-09 01:18:14,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:14,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:14,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:18:14,925 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:18:14,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 01:18:15,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:15,054 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-09 01:18:15,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:18:15,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 01:18:15,127 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-09 01:18:15,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2024-11-09 01:18:15,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2024-11-09 01:18:15,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 01:18:15,775 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:18:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 01:18:16,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339490132] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 01:18:16,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 01:18:16,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 10 [2024-11-09 01:18:16,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581011485] [2024-11-09 01:18:16,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:18:16,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 01:18:16,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:18:16,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 01:18:16,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-09 01:18:16,045 INFO L87 Difference]: Start difference. First operand 44 states and 52 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 01:18:16,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:18:16,237 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2024-11-09 01:18:16,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 01:18:16,239 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 21 [2024-11-09 01:18:16,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:18:16,240 INFO L225 Difference]: With dead ends: 62 [2024-11-09 01:18:16,240 INFO L226 Difference]: Without dead ends: 62 [2024-11-09 01:18:16,240 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-09 01:18:16,241 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:18:16,241 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 47 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:18:16,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-09 01:18:16,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2024-11-09 01:18:16,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 57 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:16,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2024-11-09 01:18:16,258 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 21 [2024-11-09 01:18:16,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:18:16,258 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2024-11-09 01:18:16,259 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 01:18:16,259 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2024-11-09 01:18:16,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 01:18:16,259 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:18:16,259 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:18:16,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 01:18:16,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 01:18:16,460 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:18:16,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:18:16,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1064475696, now seen corresponding path program 1 times [2024-11-09 01:18:16,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:18:16,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413606928] [2024-11-09 01:18:16,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:16,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:18:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 01:18:16,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:18:16,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413606928] [2024-11-09 01:18:16,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413606928] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:18:16,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026673341] [2024-11-09 01:18:16,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:16,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:16,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:18:16,761 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:18:16,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 01:18:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:16,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 01:18:16,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:18:17,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2024-11-09 01:18:17,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 01:18:17,074 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:18:17,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-09 01:18:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 01:18:17,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026673341] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:18:17,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2025151132] [2024-11-09 01:18:17,245 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 01:18:17,246 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:18:17,246 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:18:17,247 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:18:17,247 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:18:18,976 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:18:20,316 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1787#(and (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |ULTIMATE.start_diff_~k~0#1| 0) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= |ULTIMATE.start_diff_~found~0#1| 0) (<= 4 (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (= |ULTIMATE.start_diff_~D#1.offset| 0) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |ULTIMATE.start_diff_~A#1.offset| 0) (exists ((|v_ULTIMATE.start_diff_~B#1.base_17| Int)) (<= (+ (select |#length| |v_ULTIMATE.start_diff_~B#1.base_17|) 1) (* |ULTIMATE.start_diff_~l2~0#1| 4))) (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) 0) |ULTIMATE.start_diff_#t~mem2#1|))' at error location [2024-11-09 01:18:20,316 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:18:20,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:18:20,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-11-09 01:18:20,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901934862] [2024-11-09 01:18:20,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:18:20,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 01:18:20,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:18:20,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 01:18:20,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 01:18:20,319 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:20,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:18:20,458 INFO L93 Difference]: Finished difference Result 99 states and 122 transitions. [2024-11-09 01:18:20,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 01:18:20,458 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-09 01:18:20,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:18:20,459 INFO L225 Difference]: With dead ends: 99 [2024-11-09 01:18:20,459 INFO L226 Difference]: Without dead ends: 99 [2024-11-09 01:18:20,460 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 01:18:20,461 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:18:20,461 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 126 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:18:20,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-09 01:18:20,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 93. [2024-11-09 01:18:20,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.3522727272727273) internal successors, (119), 92 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 01:18:20,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 119 transitions. [2024-11-09 01:18:20,475 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 119 transitions. Word has length 21 [2024-11-09 01:18:20,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:18:20,475 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 119 transitions. [2024-11-09 01:18:20,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:20,475 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 119 transitions. [2024-11-09 01:18:20,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-09 01:18:20,476 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:18:20,476 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:18:20,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 01:18:20,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 01:18:20,677 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:18:20,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:18:20,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1328677719, now seen corresponding path program 1 times [2024-11-09 01:18:20,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:18:20,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288911321] [2024-11-09 01:18:20,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:20,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:18:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 01:18:21,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:18:21,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288911321] [2024-11-09 01:18:21,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288911321] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:18:21,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535885680] [2024-11-09 01:18:21,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:21,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:21,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:18:21,205 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:18:21,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 01:18:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:21,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 01:18:21,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:18:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 01:18:22,276 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:18:22,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535885680] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:18:22,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:18:22,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2024-11-09 01:18:22,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080121364] [2024-11-09 01:18:22,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:18:22,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:18:22,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:18:22,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:18:22,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-09 01:18:22,279 INFO L87 Difference]: Start difference. First operand 93 states and 119 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:22,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:18:22,601 INFO L93 Difference]: Finished difference Result 92 states and 118 transitions. [2024-11-09 01:18:22,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 01:18:22,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-09 01:18:22,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:18:22,603 INFO L225 Difference]: With dead ends: 92 [2024-11-09 01:18:22,604 INFO L226 Difference]: Without dead ends: 90 [2024-11-09 01:18:22,604 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-09 01:18:22,605 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 01:18:22,605 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 42 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 01:18:22,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-09 01:18:22,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2024-11-09 01:18:22,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 86 states have (on average 1.313953488372093) internal successors, (113), 89 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:22,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2024-11-09 01:18:22,611 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 23 [2024-11-09 01:18:22,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:18:22,612 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2024-11-09 01:18:22,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:22,612 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2024-11-09 01:18:22,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-09 01:18:22,613 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:18:22,613 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:18:22,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 01:18:22,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:22,814 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:18:22,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:18:22,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1366141882, now seen corresponding path program 2 times [2024-11-09 01:18:22,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:18:22,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577418838] [2024-11-09 01:18:22,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:22,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:18:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 01:18:23,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:18:23,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577418838] [2024-11-09 01:18:23,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577418838] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:18:23,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502683228] [2024-11-09 01:18:23,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:18:23,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:23,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:18:23,146 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:18:23,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 01:18:23,324 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 01:18:23,325 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:18:23,327 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 01:18:23,330 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:18:23,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:18:23,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:18:23,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 01:18:23,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2024-11-09 01:18:23,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2024-11-09 01:18:23,940 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 01:18:23,940 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:18:24,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 01:18:24,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502683228] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:18:24,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1230629242] [2024-11-09 01:18:24,440 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 01:18:24,440 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:18:24,440 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:18:24,441 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:18:24,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:18:25,997 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:18:27,449 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2407#(and (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |ULTIMATE.start_diff_~k~0#1| 0) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= |ULTIMATE.start_diff_~found~0#1| 0) (exists ((|v_ULTIMATE.start_diff_~B#1.base_19| Int)) (<= (+ (select |#length| |v_ULTIMATE.start_diff_~B#1.base_19|) 1) (* |ULTIMATE.start_diff_~l2~0#1| 4))) (<= 4 (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (= |ULTIMATE.start_diff_~D#1.offset| 0) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |ULTIMATE.start_diff_~A#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) 0) |ULTIMATE.start_diff_#t~mem2#1|))' at error location [2024-11-09 01:18:27,449 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:18:27,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:18:27,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2024-11-09 01:18:27,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331306065] [2024-11-09 01:18:27,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:18:27,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 01:18:27,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:18:27,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 01:18:27,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 01:18:27,452 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand has 20 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 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 01:18:28,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:18:28,118 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2024-11-09 01:18:28,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 01:18:28,119 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 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 24 [2024-11-09 01:18:28,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:18:28,120 INFO L225 Difference]: With dead ends: 96 [2024-11-09 01:18:28,120 INFO L226 Difference]: Without dead ends: 96 [2024-11-09 01:18:28,121 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=205, Invalid=1687, Unknown=0, NotChecked=0, Total=1892 [2024-11-09 01:18:28,122 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 39 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 01:18:28,122 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 91 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 01:18:28,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-09 01:18:28,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 80. [2024-11-09 01:18:28,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 77 states have (on average 1.2857142857142858) internal successors, (99), 79 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 01:18:28,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2024-11-09 01:18:28,128 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 24 [2024-11-09 01:18:28,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:18:28,129 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2024-11-09 01:18:28,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 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 01:18:28,129 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2024-11-09 01:18:28,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 01:18:28,130 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:18:28,130 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:18:28,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 01:18:28,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 01:18:28,335 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:18:28,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:18:28,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1211155087, now seen corresponding path program 1 times [2024-11-09 01:18:28,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:18:28,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599246345] [2024-11-09 01:18:28,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:28,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:18:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:28,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 01:18:28,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:18:28,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599246345] [2024-11-09 01:18:28,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599246345] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:18:28,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259354130] [2024-11-09 01:18:28,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:28,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:28,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:18:28,494 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:18:28,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 01:18:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:28,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 01:18:28,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:18:28,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 01:18:28,728 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:18:28,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 01:18:28,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259354130] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:18:28,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1920435491] [2024-11-09 01:18:28,800 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 01:18:28,800 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:18:28,801 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:18:28,801 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:18:28,801 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:18:30,601 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:18:31,418 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2772#(and (= |ULTIMATE.start_diff_~B#1.offset| 0) (= |ULTIMATE.start_diff_~k~0#1| 0) (= |ULTIMATE.start_diff_~found~0#1| 0) (<= 0 |ULTIMATE.start_diff_~j~0#1|) (= |ULTIMATE.start_diff_~D#1.offset| 0) (<= (+ |ULTIMATE.start_diff_~j~0#1| 1) |ULTIMATE.start_diff_~l2~0#1|))' at error location [2024-11-09 01:18:31,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:18:31,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:18:31,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-11-09 01:18:31,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289481243] [2024-11-09 01:18:31,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:18:31,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 01:18:31,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:18:31,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 01:18:31,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2024-11-09 01:18:31,421 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:31,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:18:31,511 INFO L93 Difference]: Finished difference Result 123 states and 144 transitions. [2024-11-09 01:18:31,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 01:18:31,512 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-09 01:18:31,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:18:31,512 INFO L225 Difference]: With dead ends: 123 [2024-11-09 01:18:31,513 INFO L226 Difference]: Without dead ends: 85 [2024-11-09 01:18:31,513 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2024-11-09 01:18:31,514 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:18:31,514 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 55 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:18:31,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-09 01:18:31,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2024-11-09 01:18:31,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 80 states have (on average 1.275) internal successors, (102), 82 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:31,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 102 transitions. [2024-11-09 01:18:31,519 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 102 transitions. Word has length 25 [2024-11-09 01:18:31,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:18:31,520 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 102 transitions. [2024-11-09 01:18:31,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:31,520 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 102 transitions. [2024-11-09 01:18:31,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 01:18:31,521 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:18:31,521 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, 1] [2024-11-09 01:18:31,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 01:18:31,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:31,726 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:18:31,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:18:31,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1584437553, now seen corresponding path program 2 times [2024-11-09 01:18:31,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:18:31,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565042376] [2024-11-09 01:18:31,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:31,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:18:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 01:18:31,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:18:31,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565042376] [2024-11-09 01:18:31,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565042376] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:18:31,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083866367] [2024-11-09 01:18:31,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:18:31,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:31,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:18:31,997 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:18:32,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 01:18:32,137 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 01:18:32,137 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:18:32,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 01:18:32,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:18:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 01:18:32,440 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:18:33,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-09 01:18:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 01:18:33,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083866367] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:18:33,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1543773929] [2024-11-09 01:18:33,091 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 01:18:33,091 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:18:33,091 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:18:33,092 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:18:33,092 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:18:34,752 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:18:35,672 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3173#(and (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |ULTIMATE.start_diff_~k~0#1| 0) (= |ULTIMATE.start_diff_~found~0#1| 0) (<= 0 |ULTIMATE.start_diff_~j~0#1|) (= |ULTIMATE.start_diff_~D#1.offset| 0) (<= (+ |ULTIMATE.start_diff_~j~0#1| 1) |ULTIMATE.start_diff_~l2~0#1|))' at error location [2024-11-09 01:18:35,672 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:18:35,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:18:35,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2024-11-09 01:18:35,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349336164] [2024-11-09 01:18:35,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:18:35,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 01:18:35,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:18:35,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 01:18:35,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2024-11-09 01:18:35,675 INFO L87 Difference]: Start difference. First operand 83 states and 102 transitions. Second operand has 19 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:36,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:18:36,060 INFO L93 Difference]: Finished difference Result 132 states and 152 transitions. [2024-11-09 01:18:36,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 01:18:36,061 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-09 01:18:36,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:18:36,061 INFO L225 Difference]: With dead ends: 132 [2024-11-09 01:18:36,062 INFO L226 Difference]: Without dead ends: 132 [2024-11-09 01:18:36,062 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=192, Invalid=1290, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 01:18:36,063 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 84 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:18:36,064 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 116 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:18:36,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-09 01:18:36,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 63. [2024-11-09 01:18:36,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 62 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:36,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2024-11-09 01:18:36,068 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 28 [2024-11-09 01:18:36,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:18:36,069 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2024-11-09 01:18:36,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:36,069 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2024-11-09 01:18:36,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 01:18:36,070 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:18:36,070 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:18:36,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 01:18:36,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 01:18:36,271 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:18:36,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:18:36,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1085221346, now seen corresponding path program 1 times [2024-11-09 01:18:36,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:18:36,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722588810] [2024-11-09 01:18:36,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:36,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:18:36,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 01:18:36,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:18:36,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722588810] [2024-11-09 01:18:36,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722588810] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:18:36,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861519072] [2024-11-09 01:18:36,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:36,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:36,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:18:36,890 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:18:36,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 01:18:37,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:37,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-09 01:18:37,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:18:37,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 01:18:37,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2024-11-09 01:18:37,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:18:37,106 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-09 01:18:37,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2024-11-09 01:18:37,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:18:37,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 01:18:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 01:18:38,147 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:18:38,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 01:18:38,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861519072] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:18:38,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1295362200] [2024-11-09 01:18:38,617 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:18:38,617 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:18:38,618 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:18:38,618 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:18:38,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:18:41,096 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:18:43,007 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3616#(and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (exists ((|v_ULTIMATE.start_diff_~j~0#1_119| Int)) (and (or (and (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~j~0#1_119| 0)) (and (= |v_ULTIMATE.start_diff_~j~0#1_119| |ULTIMATE.start_diff_~l2~0#1|) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ (* |v_ULTIMATE.start_diff_~j~0#1_119| 4) |ULTIMATE.start_diff_~B#1.offset| (- 4))))) (<= 4 (+ (* |v_ULTIMATE.start_diff_~j~0#1_119| 4) |ULTIMATE.start_diff_~B#1.offset|)) (<= (+ (* |v_ULTIMATE.start_diff_~j~0#1_119| 4) |ULTIMATE.start_diff_~B#1.offset|) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (<= 1 |v_ULTIMATE.start_diff_~j~0#1_119|))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_119|))) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))' at error location [2024-11-09 01:18:43,007 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:18:43,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:18:43,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-09 01:18:43,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988271234] [2024-11-09 01:18:43,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:18:43,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 01:18:43,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:18:43,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 01:18:43,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 01:18:43,010 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 17 states, 16 states have (on average 6.1875) 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 01:18:43,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:18:43,582 INFO L93 Difference]: Finished difference Result 123 states and 139 transitions. [2024-11-09 01:18:43,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 01:18:43,583 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 6.1875) 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 35 [2024-11-09 01:18:43,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:18:43,584 INFO L225 Difference]: With dead ends: 123 [2024-11-09 01:18:43,584 INFO L226 Difference]: Without dead ends: 123 [2024-11-09 01:18:43,584 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 01:18:43,585 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 01:18:43,585 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 112 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 01:18:43,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-09 01:18:43,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 107. [2024-11-09 01:18:43,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.1603773584905661) internal successors, (123), 106 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:43,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 123 transitions. [2024-11-09 01:18:43,590 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 123 transitions. Word has length 35 [2024-11-09 01:18:43,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:18:43,591 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 123 transitions. [2024-11-09 01:18:43,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 6.1875) 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 01:18:43,591 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 123 transitions. [2024-11-09 01:18:43,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-09 01:18:43,593 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:18:43,593 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:18:43,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 01:18:43,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 01:18:43,797 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:18:43,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:18:43,797 INFO L85 PathProgramCache]: Analyzing trace with hash -2002247618, now seen corresponding path program 2 times [2024-11-09 01:18:43,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:18:43,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539455876] [2024-11-09 01:18:43,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:43,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:18:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 48 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 01:18:44,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:18:44,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539455876] [2024-11-09 01:18:44,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539455876] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:18:44,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899879028] [2024-11-09 01:18:44,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:18:44,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:44,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:18:44,089 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:18:44,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 01:18:44,319 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 01:18:44,319 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:18:44,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 01:18:44,324 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:18:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 01:18:44,618 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:18:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 01:18:44,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899879028] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:18:44,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1710131739] [2024-11-09 01:18:44,851 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:18:44,852 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:18:44,852 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:18:44,852 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:18:44,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:18:47,416 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:18:49,197 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4230#(and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_151| Int)) (and (or (and (= |v_ULTIMATE.start_diff_~j~0#1_151| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|)) (and (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= |v_ULTIMATE.start_diff_~j~0#1_151| |ULTIMATE.start_diff_~l2~0#1|) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_151| 4))) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_151| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_151| 4) (- 4))))))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_151|))) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))' at error location [2024-11-09 01:18:49,197 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:18:49,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:18:49,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-11-09 01:18:49,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872859373] [2024-11-09 01:18:49,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:18:49,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 01:18:49,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:18:49,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 01:18:49,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1427, Unknown=0, NotChecked=0, Total=1560 [2024-11-09 01:18:49,200 INFO L87 Difference]: Start difference. First operand 107 states and 123 transitions. Second operand has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 23 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:49,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:18:49,469 INFO L93 Difference]: Finished difference Result 198 states and 220 transitions. [2024-11-09 01:18:49,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 01:18:49,470 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 23 states have internal predecessors, (127), 0 states have call successors, (0), 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 01:18:49,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:18:49,471 INFO L225 Difference]: With dead ends: 198 [2024-11-09 01:18:49,471 INFO L226 Difference]: Without dead ends: 112 [2024-11-09 01:18:49,472 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=159, Invalid=1647, Unknown=0, NotChecked=0, Total=1806 [2024-11-09 01:18:49,472 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:18:49,472 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 156 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:18:49,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-09 01:18:49,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2024-11-09 01:18:49,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 109 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:49,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2024-11-09 01:18:49,477 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 57 [2024-11-09 01:18:49,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:18:49,478 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2024-11-09 01:18:49,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 23 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:49,478 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2024-11-09 01:18:49,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-09 01:18:49,480 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:18:49,480 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:18:49,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 01:18:49,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:49,681 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:18:49,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:18:49,681 INFO L85 PathProgramCache]: Analyzing trace with hash -594219296, now seen corresponding path program 3 times [2024-11-09 01:18:49,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:18:49,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361179871] [2024-11-09 01:18:49,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:49,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:18:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 48 proven. 39 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 01:18:50,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:18:50,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361179871] [2024-11-09 01:18:50,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361179871] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:18:50,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436960883] [2024-11-09 01:18:50,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:18:50,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:50,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:18:50,017 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:18:50,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 01:18:50,241 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:18:50,241 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:18:50,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 01:18:50,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:18:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 75 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 01:18:50,494 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:18:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 75 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 01:18:50,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436960883] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:18:50,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [197720023] [2024-11-09 01:18:50,654 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:18:50,655 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:18:50,655 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:18:50,655 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:18:50,655 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:18:53,124 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:18:54,634 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4930#(and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))) (exists ((|v_ULTIMATE.start_diff_~j~0#1_183| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_183|) (or (and (= |v_ULTIMATE.start_diff_~j~0#1_183| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|)) (and (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_183| 4))) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_183| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_183| 4))) (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)))) (= |v_ULTIMATE.start_diff_~j~0#1_183| |ULTIMATE.start_diff_~l2~0#1|))))))' at error location [2024-11-09 01:18:54,634 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:18:54,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:18:54,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2024-11-09 01:18:54,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552738953] [2024-11-09 01:18:54,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:18:54,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 01:18:54,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:18:54,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 01:18:54,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2024-11-09 01:18:54,636 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 16 states, 16 states have (on average 6.6875) internal successors, (107), 15 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:54,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:18:54,823 INFO L93 Difference]: Finished difference Result 271 states and 300 transitions. [2024-11-09 01:18:54,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 01:18:54,824 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.6875) internal successors, (107), 15 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2024-11-09 01:18:54,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:18:54,824 INFO L225 Difference]: With dead ends: 271 [2024-11-09 01:18:54,825 INFO L226 Difference]: Without dead ends: 115 [2024-11-09 01:18:54,825 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 150 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2024-11-09 01:18:54,826 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 5 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:18:54,826 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 177 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:18:54,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-09 01:18:54,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2024-11-09 01:18:54,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.1517857142857142) internal successors, (129), 112 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 01:18:54,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2024-11-09 01:18:54,831 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 60 [2024-11-09 01:18:54,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:18:54,831 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2024-11-09 01:18:54,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.6875) internal successors, (107), 15 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:18:54,832 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2024-11-09 01:18:54,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-09 01:18:54,834 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:18:54,834 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:18:54,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 01:18:55,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:55,035 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:18:55,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:18:55,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1326908670, now seen corresponding path program 4 times [2024-11-09 01:18:55,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:18:55,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501471456] [2024-11-09 01:18:55,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:55,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:18:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 80 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 01:18:56,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:18:56,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501471456] [2024-11-09 01:18:56,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501471456] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:18:56,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021856773] [2024-11-09 01:18:56,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:18:56,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:56,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:18:56,140 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:18:56,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 01:18:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:56,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-09 01:18:56,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:18:56,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:18:56,373 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-09 01:18:56,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2024-11-09 01:18:56,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 01:18:56,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 01:18:56,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2024-11-09 01:18:58,629 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 01:18:58,629 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:18:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 1 proven. 75 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 01:18:59,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021856773] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:18:59,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2076746234] [2024-11-09 01:18:59,657 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:18:59,657 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:18:59,657 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:18:59,658 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:18:59,658 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:19:02,061 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:19:04,703 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5732#(and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))) (exists ((|v_ULTIMATE.start_diff_~j~0#1_214| Int)) (and (or (and (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_214| 4))))) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_214| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (= |v_ULTIMATE.start_diff_~j~0#1_214| |ULTIMATE.start_diff_~l2~0#1|) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_214| 4)))) (and (= |v_ULTIMATE.start_diff_~j~0#1_214| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_214|))))' at error location [2024-11-09 01:19:04,704 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:19:04,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:19:04,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2024-11-09 01:19:04,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419830779] [2024-11-09 01:19:04,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:19:04,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-09 01:19:04,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:19:04,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-09 01:19:04,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1875, Unknown=0, NotChecked=0, Total=2070 [2024-11-09 01:19:04,707 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand has 30 states, 29 states have (on average 5.896551724137931) internal successors, (171), 29 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:06,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:19:06,334 INFO L93 Difference]: Finished difference Result 245 states and 273 transitions. [2024-11-09 01:19:06,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 01:19:06,335 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 5.896551724137931) internal successors, (171), 29 states have internal predecessors, (171), 0 states have call successors, (0), 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 63 [2024-11-09 01:19:06,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:19:06,336 INFO L225 Difference]: With dead ends: 245 [2024-11-09 01:19:06,336 INFO L226 Difference]: Without dead ends: 245 [2024-11-09 01:19:06,337 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=416, Invalid=3124, Unknown=0, NotChecked=0, Total=3540 [2024-11-09 01:19:06,338 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 69 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 01:19:06,338 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 258 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 01:19:06,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-11-09 01:19:06,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 201. [2024-11-09 01:19:06,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.145) internal successors, (229), 200 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:06,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 229 transitions. [2024-11-09 01:19:06,353 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 229 transitions. Word has length 63 [2024-11-09 01:19:06,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:19:06,354 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 229 transitions. [2024-11-09 01:19:06,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 5.896551724137931) internal successors, (171), 29 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:06,354 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 229 transitions. [2024-11-09 01:19:06,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-09 01:19:06,356 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:19:06,356 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:19:06,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-09 01:19:06,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-09 01:19:06,560 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:19:06,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:19:06,561 INFO L85 PathProgramCache]: Analyzing trace with hash -241012418, now seen corresponding path program 5 times [2024-11-09 01:19:06,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:19:06,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727934760] [2024-11-09 01:19:06,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:19:06,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:19:06,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:19:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 278 proven. 101 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 01:19:07,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:19:07,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727934760] [2024-11-09 01:19:07,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727934760] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:19:07,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855276505] [2024-11-09 01:19:07,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:19:07,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:19:07,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:19:07,139 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:19:07,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 01:19:07,404 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-09 01:19:07,404 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:19:07,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 01:19:07,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:19:07,963 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 140 proven. 183 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-09 01:19:07,964 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:19:08,361 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 140 proven. 183 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-09 01:19:08,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855276505] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:19:08,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [810940812] [2024-11-09 01:19:08,364 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:19:08,364 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:19:08,364 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:19:08,364 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:19:08,364 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:19:10,725 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:19:12,938 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6894#(and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))) (exists ((|v_ULTIMATE.start_diff_~j~0#1_257| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_257|) (or (and (= |v_ULTIMATE.start_diff_~j~0#1_257| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|)) (and (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_257| 4))))) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_257| 4))) (<= 1 |v_ULTIMATE.start_diff_~j~0#1_257|) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (= |v_ULTIMATE.start_diff_~j~0#1_257| |ULTIMATE.start_diff_~l2~0#1|) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_257| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)))))))' at error location [2024-11-09 01:19:12,938 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:19:12,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:19:12,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 35 [2024-11-09 01:19:12,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539164444] [2024-11-09 01:19:12,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:19:12,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-09 01:19:12,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:19:12,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-09 01:19:12,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2418, Unknown=0, NotChecked=0, Total=2652 [2024-11-09 01:19:12,942 INFO L87 Difference]: Start difference. First operand 201 states and 229 transitions. Second operand has 36 states, 36 states have (on average 6.055555555555555) internal successors, (218), 35 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:13,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:19:13,423 INFO L93 Difference]: Finished difference Result 454 states and 505 transitions. [2024-11-09 01:19:13,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 01:19:13,425 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.055555555555555) internal successors, (218), 35 states have internal predecessors, (218), 0 states have call successors, (0), 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 107 [2024-11-09 01:19:13,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:19:13,426 INFO L225 Difference]: With dead ends: 454 [2024-11-09 01:19:13,426 INFO L226 Difference]: Without dead ends: 206 [2024-11-09 01:19:13,427 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 280 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=291, Invalid=2901, Unknown=0, NotChecked=0, Total=3192 [2024-11-09 01:19:13,428 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 01:19:13,429 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 352 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 01:19:13,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-11-09 01:19:13,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2024-11-09 01:19:13,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.1428571428571428) internal successors, (232), 203 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:13,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 232 transitions. [2024-11-09 01:19:13,434 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 232 transitions. Word has length 107 [2024-11-09 01:19:13,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:19:13,435 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 232 transitions. [2024-11-09 01:19:13,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.055555555555555) internal successors, (218), 35 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:13,435 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 232 transitions. [2024-11-09 01:19:13,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-09 01:19:13,437 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:19:13,437 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:19:13,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 01:19:13,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 01:19:13,638 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:19:13,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:19:13,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1568107680, now seen corresponding path program 6 times [2024-11-09 01:19:13,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:19:13,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384850472] [2024-11-09 01:19:13,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:19:13,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:19:13,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:19:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 278 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 01:19:14,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:19:14,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384850472] [2024-11-09 01:19:14,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384850472] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:19:14,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084081187] [2024-11-09 01:19:14,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:19:14,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:19:14,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:19:14,188 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:19:14,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 01:19:14,526 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:19:14,526 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:19:14,530 INFO L255 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 01:19:14,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:19:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 322 proven. 35 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-09 01:19:14,866 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:19:15,129 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 322 proven. 35 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-09 01:19:15,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084081187] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:19:15,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1282344562] [2024-11-09 01:19:15,131 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:19:15,131 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:19:15,132 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:19:15,132 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:19:15,132 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:19:17,440 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:19:19,371 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8256#(and (exists ((|v_ULTIMATE.start_diff_~j~0#1_300| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_300|) (or (and (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_300| 4))))) (<= 1 |v_ULTIMATE.start_diff_~j~0#1_300|) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_300| 4))) (= |v_ULTIMATE.start_diff_~j~0#1_300| |ULTIMATE.start_diff_~l2~0#1|) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_300| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|))) (and (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~j~0#1_300| 0))))) (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))' at error location [2024-11-09 01:19:19,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:19:19,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:19:19,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 23 [2024-11-09 01:19:19,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7869203] [2024-11-09 01:19:19,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:19:19,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 01:19:19,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:19:19,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 01:19:19,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2024-11-09 01:19:19,374 INFO L87 Difference]: Start difference. First operand 204 states and 232 transitions. Second operand has 24 states, 24 states have (on average 7.625) internal successors, (183), 23 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:19,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:19:19,644 INFO L93 Difference]: Finished difference Result 571 states and 635 transitions. [2024-11-09 01:19:19,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 01:19:19,645 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 7.625) internal successors, (183), 23 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2024-11-09 01:19:19,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:19:19,646 INFO L225 Difference]: With dead ends: 571 [2024-11-09 01:19:19,646 INFO L226 Difference]: Without dead ends: 209 [2024-11-09 01:19:19,647 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 294 SyntacticMatches, 12 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2024-11-09 01:19:19,647 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 13 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 01:19:19,648 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 228 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 01:19:19,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-11-09 01:19:19,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2024-11-09 01:19:19,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.1407766990291262) internal successors, (235), 206 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:19,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 235 transitions. [2024-11-09 01:19:19,654 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 235 transitions. Word has length 110 [2024-11-09 01:19:19,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:19:19,655 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 235 transitions. [2024-11-09 01:19:19,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.625) internal successors, (183), 23 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:19,655 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 235 transitions. [2024-11-09 01:19:19,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-09 01:19:19,657 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:19:19,657 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:19:19,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-09 01:19:19,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:19:19,862 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:19:19,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:19:19,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1889098242, now seen corresponding path program 7 times [2024-11-09 01:19:19,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:19:19,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248911367] [2024-11-09 01:19:19,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:19:19,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:19:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:19:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 278 proven. 130 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 01:19:20,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:19:20,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248911367] [2024-11-09 01:19:20,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248911367] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:19:20,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626615609] [2024-11-09 01:19:20,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:19:20,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:19:20,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:19:20,492 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:19:20,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 01:19:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:19:20,737 INFO L255 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 01:19:20,741 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:19:21,165 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 346 proven. 51 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 01:19:21,166 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:19:21,422 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 346 proven. 51 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 01:19:21,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626615609] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:19:21,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1146416131] [2024-11-09 01:19:21,424 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:19:21,425 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:19:21,425 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:19:21,425 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:19:21,425 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:19:23,755 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:19:25,663 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9748#(and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_344| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_344|) (or (and (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_344| 4))) (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)))) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_344| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_344| 4))) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= 1 |v_ULTIMATE.start_diff_~j~0#1_344|) (= |v_ULTIMATE.start_diff_~j~0#1_344| |ULTIMATE.start_diff_~l2~0#1|)) (and (= |v_ULTIMATE.start_diff_~j~0#1_344| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|))))) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))' at error location [2024-11-09 01:19:25,663 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:19:25,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:19:25,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 25 [2024-11-09 01:19:25,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310425940] [2024-11-09 01:19:25,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:19:25,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 01:19:25,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:19:25,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 01:19:25,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1526, Unknown=0, NotChecked=0, Total=1722 [2024-11-09 01:19:25,665 INFO L87 Difference]: Start difference. First operand 207 states and 235 transitions. Second operand has 26 states, 26 states have (on average 7.576923076923077) internal successors, (197), 25 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:26,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:19:26,006 INFO L93 Difference]: Finished difference Result 710 states and 790 transitions. [2024-11-09 01:19:26,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 01:19:26,007 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 7.576923076923077) internal successors, (197), 25 states have internal predecessors, (197), 0 states have call successors, (0), 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 01:19:26,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:19:26,008 INFO L225 Difference]: With dead ends: 710 [2024-11-09 01:19:26,008 INFO L226 Difference]: Without dead ends: 212 [2024-11-09 01:19:26,008 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 300 SyntacticMatches, 14 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=196, Invalid=1526, Unknown=0, NotChecked=0, Total=1722 [2024-11-09 01:19:26,009 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 11 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 01:19:26,009 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 327 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 01:19:26,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2024-11-09 01:19:26,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 210. [2024-11-09 01:19:26,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.138755980861244) internal successors, (238), 209 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:26,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 238 transitions. [2024-11-09 01:19:26,015 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 238 transitions. Word has length 113 [2024-11-09 01:19:26,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:19:26,016 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 238 transitions. [2024-11-09 01:19:26,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.576923076923077) internal successors, (197), 25 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:26,016 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 238 transitions. [2024-11-09 01:19:26,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-09 01:19:26,018 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:19:26,018 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:19:26,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-09 01:19:26,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:19:26,222 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:19:26,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:19:26,222 INFO L85 PathProgramCache]: Analyzing trace with hash 373237408, now seen corresponding path program 8 times [2024-11-09 01:19:26,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:19:26,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398329136] [2024-11-09 01:19:26,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:19:26,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:19:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:19:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 278 proven. 149 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 01:19:26,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:19:26,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398329136] [2024-11-09 01:19:26,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398329136] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:19:26,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798935751] [2024-11-09 01:19:26,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:19:26,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:19:26,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:19:26,924 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:19:26,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 01:19:27,780 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-09 01:19:27,780 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:19:27,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 01:19:27,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:19:28,268 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 357 proven. 70 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 01:19:28,268 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:19:28,576 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 357 proven. 70 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 01:19:28,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798935751] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:19:28,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1047378910] [2024-11-09 01:19:28,578 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:19:28,578 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:19:28,578 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:19:28,578 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:19:28,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:19:30,677 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:19:32,484 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11402#(and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))) (exists ((|v_ULTIMATE.start_diff_~j~0#1_388| Int)) (and (or (and (<= 1 |v_ULTIMATE.start_diff_~j~0#1_388|) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_388| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_388| 4))))) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_388| 4))) (= |v_ULTIMATE.start_diff_~j~0#1_388| |ULTIMATE.start_diff_~l2~0#1|)) (and (= |v_ULTIMATE.start_diff_~j~0#1_388| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_388|))))' at error location [2024-11-09 01:19:32,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:19:32,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:19:32,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 27 [2024-11-09 01:19:32,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097306475] [2024-11-09 01:19:32,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:19:32,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 01:19:32,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:19:32,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 01:19:32,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1670, Unknown=0, NotChecked=0, Total=1892 [2024-11-09 01:19:32,487 INFO L87 Difference]: Start difference. First operand 210 states and 238 transitions. Second operand has 28 states, 28 states have (on average 7.392857142857143) internal successors, (207), 27 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:32,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:19:32,933 INFO L93 Difference]: Finished difference Result 871 states and 970 transitions. [2024-11-09 01:19:32,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 01:19:32,934 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 7.392857142857143) internal successors, (207), 27 states have internal predecessors, (207), 0 states have call successors, (0), 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 116 [2024-11-09 01:19:32,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:19:32,935 INFO L225 Difference]: With dead ends: 871 [2024-11-09 01:19:32,935 INFO L226 Difference]: Without dead ends: 215 [2024-11-09 01:19:32,936 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 306 SyntacticMatches, 16 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=222, Invalid=1670, Unknown=0, NotChecked=0, Total=1892 [2024-11-09 01:19:32,937 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 10 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 01:19:32,937 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 308 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 01:19:32,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-11-09 01:19:32,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2024-11-09 01:19:32,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.1367924528301887) internal successors, (241), 212 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:32,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 241 transitions. [2024-11-09 01:19:32,966 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 241 transitions. Word has length 116 [2024-11-09 01:19:32,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:19:32,966 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 241 transitions. [2024-11-09 01:19:32,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.392857142857143) internal successors, (207), 27 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:32,967 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 241 transitions. [2024-11-09 01:19:32,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-11-09 01:19:32,968 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:19:32,968 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:19:32,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-09 01:19:33,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:19:33,169 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:19:33,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:19:33,170 INFO L85 PathProgramCache]: Analyzing trace with hash 987777726, now seen corresponding path program 9 times [2024-11-09 01:19:33,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:19:33,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917115026] [2024-11-09 01:19:33,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:19:33,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:19:33,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:19:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 63 proven. 387 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 01:19:35,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:19:35,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917115026] [2024-11-09 01:19:35,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917115026] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:19:35,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98579493] [2024-11-09 01:19:35,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:19:35,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:19:35,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:19:35,262 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:19:35,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 01:19:36,156 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:19:36,156 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:19:36,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-11-09 01:19:36,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:19:36,187 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 14 treesize of output 12 [2024-11-09 01:19:36,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-09 01:19:36,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2024-11-09 01:19:39,666 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 01:19:39,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 9 [2024-11-09 01:19:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 84 proven. 368 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 01:19:42,714 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:19:44,248 INFO L349 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2024-11-09 01:19:44,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2024-11-09 01:19:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 92 proven. 360 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 01:19:46,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98579493] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:19:46,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1385129913] [2024-11-09 01:19:46,293 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:19:46,293 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:19:46,293 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:19:46,293 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:19:46,293 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:19:48,572 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:19:52,128 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13284#(and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))) (exists ((|v_ULTIMATE.start_diff_~j~0#1_434| Int)) (and (or (and (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~j~0#1_434| 0)) (and (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_434| 4))))) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (= |v_ULTIMATE.start_diff_~j~0#1_434| |ULTIMATE.start_diff_~l2~0#1|) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_434| 4))) (<= 1 |v_ULTIMATE.start_diff_~j~0#1_434|) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_434| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_434|))))' at error location [2024-11-09 01:19:52,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:19:52,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:19:52,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 27, 27] total 72 [2024-11-09 01:19:52,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564343953] [2024-11-09 01:19:52,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:19:52,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-11-09 01:19:52,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:19:52,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-11-09 01:19:52,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=7419, Unknown=0, NotChecked=0, Total=8010 [2024-11-09 01:19:52,134 INFO L87 Difference]: Start difference. First operand 213 states and 241 transitions. Second operand has 74 states, 73 states have (on average 4.890410958904109) internal successors, (357), 73 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:20:00,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:20:00,832 INFO L93 Difference]: Finished difference Result 521 states and 597 transitions. [2024-11-09 01:20:00,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-09 01:20:00,833 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 4.890410958904109) internal successors, (357), 73 states have internal predecessors, (357), 0 states have call successors, (0), 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 119 [2024-11-09 01:20:00,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:20:00,835 INFO L225 Difference]: With dead ends: 521 [2024-11-09 01:20:00,836 INFO L226 Difference]: Without dead ends: 521 [2024-11-09 01:20:00,841 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 285 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5757 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=1316, Invalid=17590, Unknown=0, NotChecked=0, Total=18906 [2024-11-09 01:20:00,842 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 177 mSDsluCounter, 1662 mSDsCounter, 0 mSdLazyCounter, 3968 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1758 SdHoareTripleChecker+Invalid, 3985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 3968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-09 01:20:00,842 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 1758 Invalid, 3985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 3968 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-09 01:20:00,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2024-11-09 01:20:00,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 288. [2024-11-09 01:20:00,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.1533101045296168) internal successors, (331), 287 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:20:00,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 331 transitions. [2024-11-09 01:20:00,853 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 331 transitions. Word has length 119 [2024-11-09 01:20:00,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:20:00,854 INFO L471 AbstractCegarLoop]: Abstraction has 288 states and 331 transitions. [2024-11-09 01:20:00,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 4.890410958904109) internal successors, (357), 73 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:20:00,855 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 331 transitions. [2024-11-09 01:20:00,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-09 01:20:00,857 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:20:00,857 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:20:00,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-09 01:20:01,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-09 01:20:01,058 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:20:01,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:20:01,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1195191793, now seen corresponding path program 10 times [2024-11-09 01:20:01,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:20:01,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63206495] [2024-11-09 01:20:01,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:20:01,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:20:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:20:01,926 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 368 proven. 184 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 01:20:01,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:20:01,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63206495] [2024-11-09 01:20:01,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63206495] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:20:01,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851805221] [2024-11-09 01:20:01,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:20:01,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:20:01,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:20:01,930 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:20:01,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 01:20:02,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:20:02,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 01:20:02,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:20:02,982 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 460 proven. 92 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 01:20:02,983 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:20:03,435 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 460 proven. 92 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 01:20:03,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851805221] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:20:03,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [332701133] [2024-11-09 01:20:03,437 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:20:03,438 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:20:03,438 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:20:03,438 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:20:03,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:20:05,716 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:20:07,708 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15010#(and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))) (exists ((|v_ULTIMATE.start_diff_~j~0#1_481| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_481|) (or (and (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_481| 4))))) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_481| 4))) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (= |v_ULTIMATE.start_diff_~j~0#1_481| |ULTIMATE.start_diff_~l2~0#1|) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_481| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|))) (and (= |v_ULTIMATE.start_diff_~j~0#1_481| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|))))))' at error location [2024-11-09 01:20:07,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:20:07,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:20:07,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 30 [2024-11-09 01:20:07,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272284207] [2024-11-09 01:20:07,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:20:07,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 01:20:07,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:20:07,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 01:20:07,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1901, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 01:20:07,712 INFO L87 Difference]: Start difference. First operand 288 states and 331 transitions. Second operand has 31 states, 31 states have (on average 7.483870967741935) internal successors, (232), 30 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:20:08,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:20:08,165 INFO L93 Difference]: Finished difference Result 1430 states and 1628 transitions. [2024-11-09 01:20:08,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 01:20:08,166 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 7.483870967741935) internal successors, (232), 30 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2024-11-09 01:20:08,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:20:08,167 INFO L225 Difference]: With dead ends: 1430 [2024-11-09 01:20:08,168 INFO L226 Difference]: Without dead ends: 293 [2024-11-09 01:20:08,168 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 345 SyntacticMatches, 18 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=261, Invalid=1901, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 01:20:08,169 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 19 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 01:20:08,169 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 362 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 01:20:08,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-11-09 01:20:08,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 291. [2024-11-09 01:20:08,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.1517241379310346) internal successors, (334), 290 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:20:08,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 334 transitions. [2024-11-09 01:20:08,178 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 334 transitions. Word has length 130 [2024-11-09 01:20:08,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:20:08,178 INFO L471 AbstractCegarLoop]: Abstraction has 291 states and 334 transitions. [2024-11-09 01:20:08,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 7.483870967741935) internal successors, (232), 30 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:20:08,179 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 334 transitions. [2024-11-09 01:20:08,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-11-09 01:20:08,181 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:20:08,181 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:20:08,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-09 01:20:08,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-09 01:20:08,385 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:20:08,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:20:08,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1597651569, now seen corresponding path program 11 times [2024-11-09 01:20:08,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:20:08,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648228994] [2024-11-09 01:20:08,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:20:08,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:20:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:20:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 108 proven. 470 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 01:20:10,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:20:10,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648228994] [2024-11-09 01:20:10,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648228994] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:20:10,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137145410] [2024-11-09 01:20:10,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:20:10,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:20:10,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:20:10,268 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:20:10,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 01:20:10,807 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-09 01:20:10,808 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:20:10,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-09 01:20:10,817 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:20:10,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:20:10,850 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-09 01:20:10,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2024-11-09 01:20:10,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 01:20:10,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 01:20:10,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2024-11-09 01:20:15,431 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 460 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-11-09 01:20:15,431 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:20:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 460 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-11-09 01:20:18,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137145410] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:20:18,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [914470061] [2024-11-09 01:20:18,225 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:20:18,225 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:20:18,225 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:20:18,225 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:20:18,225 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:20:20,447 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:20:23,877 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17599#(and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (exists ((|v_ULTIMATE.start_diff_~j~0#1_528| Int)) (and (or (and (= |v_ULTIMATE.start_diff_~j~0#1_528| |ULTIMATE.start_diff_~l2~0#1|) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_528| 4))))) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= 1 |v_ULTIMATE.start_diff_~j~0#1_528|) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_528| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_528| 4)))) (and (= |v_ULTIMATE.start_diff_~j~0#1_528| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_528|))) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))' at error location [2024-11-09 01:20:23,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:20:23,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:20:23,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 58 [2024-11-09 01:20:23,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789886662] [2024-11-09 01:20:23,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:20:23,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-09 01:20:23,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:20:23,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-09 01:20:23,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=560, Invalid=5140, Unknown=0, NotChecked=0, Total=5700 [2024-11-09 01:20:23,880 INFO L87 Difference]: Start difference. First operand 291 states and 334 transitions. Second operand has 60 states, 59 states have (on average 5.9491525423728815) internal successors, (351), 59 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:20:30,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:20:30,999 INFO L93 Difference]: Finished difference Result 679 states and 761 transitions. [2024-11-09 01:20:31,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-09 01:20:31,000 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 5.9491525423728815) internal successors, (351), 59 states have internal predecessors, (351), 0 states have call successors, (0), 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 133 [2024-11-09 01:20:31,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:20:31,002 INFO L225 Difference]: With dead ends: 679 [2024-11-09 01:20:31,003 INFO L226 Difference]: Without dead ends: 679 [2024-11-09 01:20:31,005 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 343 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3678 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=1891, Invalid=11219, Unknown=0, NotChecked=0, Total=13110 [2024-11-09 01:20:31,006 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 194 mSDsluCounter, 1252 mSDsCounter, 0 mSdLazyCounter, 3006 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 3016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-09 01:20:31,006 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 1302 Invalid, 3016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3006 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-09 01:20:31,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2024-11-09 01:20:31,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 436. [2024-11-09 01:20:31,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.1356321839080459) internal successors, (494), 435 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:20:31,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 494 transitions. [2024-11-09 01:20:31,019 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 494 transitions. Word has length 133 [2024-11-09 01:20:31,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:20:31,019 INFO L471 AbstractCegarLoop]: Abstraction has 436 states and 494 transitions. [2024-11-09 01:20:31,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 5.9491525423728815) internal successors, (351), 59 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:20:31,020 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 494 transitions. [2024-11-09 01:20:31,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2024-11-09 01:20:31,023 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:20:31,023 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:20:31,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-09 01:20:31,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 01:20:31,224 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:20:31,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:20:31,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1748240128, now seen corresponding path program 12 times [2024-11-09 01:20:31,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:20:31,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927320194] [2024-11-09 01:20:31,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:20:31,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:20:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:20:32,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 1763 proven. 326 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 01:20:32,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:20:32,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927320194] [2024-11-09 01:20:32,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927320194] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:20:32,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312846510] [2024-11-09 01:20:32,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:20:32,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:20:32,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:20:32,950 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:20:32,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 01:20:37,725 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:20:37,725 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:20:37,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 01:20:37,738 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:20:38,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 1520 proven. 117 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2024-11-09 01:20:38,450 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:20:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 1520 proven. 117 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2024-11-09 01:20:38,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312846510] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:20:38,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [555902497] [2024-11-09 01:20:38,887 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:20:38,887 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:20:38,887 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:20:38,887 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:20:38,888 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:20:40,724 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:20:42,898 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20236#(and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (exists ((|v_ULTIMATE.start_diff_~j~0#1_601| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_601|) (or (and (= |v_ULTIMATE.start_diff_~j~0#1_601| |ULTIMATE.start_diff_~l2~0#1|) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (<= 4 (+ (* |v_ULTIMATE.start_diff_~j~0#1_601| 4) |ULTIMATE.start_diff_~B#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= (+ (* |v_ULTIMATE.start_diff_~j~0#1_601| 4) |ULTIMATE.start_diff_~B#1.offset|) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ (* |v_ULTIMATE.start_diff_~j~0#1_601| 4) |ULTIMATE.start_diff_~B#1.offset| (- 4)))))) (and (= |v_ULTIMATE.start_diff_~j~0#1_601| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|))))) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))' at error location [2024-11-09 01:20:42,898 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:20:42,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:20:42,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 22, 22] total 41 [2024-11-09 01:20:42,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338905575] [2024-11-09 01:20:42,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:20:42,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-09 01:20:42,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:20:42,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-09 01:20:42,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=2878, Unknown=0, NotChecked=0, Total=3306 [2024-11-09 01:20:42,902 INFO L87 Difference]: Start difference. First operand 436 states and 494 transitions. Second operand has 42 states, 42 states have (on average 8.30952380952381) internal successors, (349), 41 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:20:43,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:20:43,363 INFO L93 Difference]: Finished difference Result 1479 states and 1655 transitions. [2024-11-09 01:20:43,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 01:20:43,364 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 8.30952380952381) internal successors, (349), 41 states have internal predecessors, (349), 0 states have call successors, (0), 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 232 [2024-11-09 01:20:43,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:20:43,366 INFO L225 Difference]: With dead ends: 1479 [2024-11-09 01:20:43,366 INFO L226 Difference]: Without dead ends: 441 [2024-11-09 01:20:43,367 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 724 GetRequests, 648 SyntacticMatches, 20 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=428, Invalid=2878, Unknown=0, NotChecked=0, Total=3306 [2024-11-09 01:20:43,367 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 18 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 01:20:43,368 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 354 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 01:20:43,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2024-11-09 01:20:43,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 439. [2024-11-09 01:20:43,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.134703196347032) internal successors, (497), 438 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:20:43,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 497 transitions. [2024-11-09 01:20:43,379 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 497 transitions. Word has length 232 [2024-11-09 01:20:43,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:20:43,380 INFO L471 AbstractCegarLoop]: Abstraction has 439 states and 497 transitions. [2024-11-09 01:20:43,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 8.30952380952381) internal successors, (349), 41 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:20:43,380 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 497 transitions. [2024-11-09 01:20:43,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2024-11-09 01:20:43,382 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:20:43,382 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:20:43,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-09 01:20:43,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 01:20:43,585 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:20:43,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:20:43,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1345059358, now seen corresponding path program 13 times [2024-11-09 01:20:43,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:20:43,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741764925] [2024-11-09 01:20:43,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:20:43,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:20:43,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:20:45,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2136 backedges. 1763 proven. 354 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 01:20:45,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:20:45,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741764925] [2024-11-09 01:20:45,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741764925] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:20:45,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829660011] [2024-11-09 01:20:45,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:20:45,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:20:45,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:20:45,315 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:20:45,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-09 01:20:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:20:45,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 01:20:45,698 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:20:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2136 backedges. 1622 proven. 145 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2024-11-09 01:20:46,490 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:20:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2136 backedges. 1622 proven. 145 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2024-11-09 01:20:47,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829660011] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:20:47,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [691293321] [2024-11-09 01:20:47,006 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:20:47,006 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:20:47,006 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:20:47,006 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:20:47,006 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:20:49,358 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:20:51,450 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23618#(and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_675| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_675|) (or (and (= |v_ULTIMATE.start_diff_~j~0#1_675| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|)) (and (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_675| 4))) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_675| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_675| 4))))) (= |v_ULTIMATE.start_diff_~j~0#1_675| |ULTIMATE.start_diff_~l2~0#1|))))) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))' at error location [2024-11-09 01:20:51,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:20:51,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:20:51,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 24, 24] total 43 [2024-11-09 01:20:51,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916904951] [2024-11-09 01:20:51,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:20:51,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-09 01:20:51,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:20:51,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-09 01:20:51,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=3077, Unknown=0, NotChecked=0, Total=3540 [2024-11-09 01:20:51,454 INFO L87 Difference]: Start difference. First operand 439 states and 497 transitions. Second operand has 44 states, 44 states have (on average 8.25) internal successors, (363), 43 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:20:51,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:20:51,991 INFO L93 Difference]: Finished difference Result 1706 states and 1910 transitions. [2024-11-09 01:20:51,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 01:20:51,991 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 8.25) internal successors, (363), 43 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2024-11-09 01:20:51,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:20:51,993 INFO L225 Difference]: With dead ends: 1706 [2024-11-09 01:20:51,993 INFO L226 Difference]: Without dead ends: 444 [2024-11-09 01:20:51,994 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 734 GetRequests, 654 SyntacticMatches, 22 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=463, Invalid=3077, Unknown=0, NotChecked=0, Total=3540 [2024-11-09 01:20:51,995 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 19 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 01:20:51,996 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 414 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 01:20:51,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2024-11-09 01:20:52,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 442. [2024-11-09 01:20:52,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 1.1337868480725624) internal successors, (500), 441 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:20:52,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 500 transitions. [2024-11-09 01:20:52,006 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 500 transitions. Word has length 235 [2024-11-09 01:20:52,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:20:52,007 INFO L471 AbstractCegarLoop]: Abstraction has 442 states and 500 transitions. [2024-11-09 01:20:52,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 8.25) internal successors, (363), 43 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:20:52,007 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 500 transitions. [2024-11-09 01:20:52,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2024-11-09 01:20:52,009 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:20:52,009 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:20:52,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-09 01:20:52,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:20:52,210 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:20:52,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:20:52,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1011743808, now seen corresponding path program 14 times [2024-11-09 01:20:52,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:20:52,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961496419] [2024-11-09 01:20:52,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:20:52,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:20:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:20:54,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 1763 proven. 385 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 01:20:54,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:20:54,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961496419] [2024-11-09 01:20:54,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961496419] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:20:54,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69830961] [2024-11-09 01:20:54,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:20:54,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:20:54,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:20:54,036 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:20:54,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-09 01:20:56,811 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-09 01:20:56,811 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:20:56,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-09 01:20:56,824 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:20:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 852 proven. 1066 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2024-11-09 01:20:58,163 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:20:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 852 proven. 1066 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2024-11-09 01:20:59,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69830961] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:20:59,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [229963689] [2024-11-09 01:20:59,171 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:20:59,171 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:20:59,172 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:20:59,172 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:20:59,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:21:01,097 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:21:03,511 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27278#(and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_748| Int)) (and (or (and (= |v_ULTIMATE.start_diff_~j~0#1_748| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|)) (and (<= 1 |v_ULTIMATE.start_diff_~j~0#1_748|) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_748| 4))) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_748| 4) (- 4))) (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)))) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_748| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (= |v_ULTIMATE.start_diff_~j~0#1_748| |ULTIMATE.start_diff_~l2~0#1|))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_748|))) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))' at error location [2024-11-09 01:21:03,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:21:03,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:21:03,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 27, 27] total 73 [2024-11-09 01:21:03,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519008051] [2024-11-09 01:21:03,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:21:03,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-11-09 01:21:03,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:21:03,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-11-09 01:21:03,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=847, Invalid=7163, Unknown=0, NotChecked=0, Total=8010 [2024-11-09 01:21:03,516 INFO L87 Difference]: Start difference. First operand 442 states and 500 transitions. Second operand has 74 states, 74 states have (on average 6.324324324324325) internal successors, (468), 73 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:21:04,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:21:04,946 INFO L93 Difference]: Finished difference Result 1955 states and 2190 transitions. [2024-11-09 01:21:04,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 01:21:04,947 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 6.324324324324325) internal successors, (468), 73 states have internal predecessors, (468), 0 states have call successors, (0), 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 238 [2024-11-09 01:21:04,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:21:04,948 INFO L225 Difference]: With dead ends: 1955 [2024-11-09 01:21:04,948 INFO L226 Difference]: Without dead ends: 447 [2024-11-09 01:21:04,950 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 757 GetRequests, 645 SyntacticMatches, 11 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4960 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1145, Invalid=9361, Unknown=0, NotChecked=0, Total=10506 [2024-11-09 01:21:04,951 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 19 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 01:21:04,951 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 950 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1397 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 01:21:04,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2024-11-09 01:21:04,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 445. [2024-11-09 01:21:04,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 1.132882882882883) internal successors, (503), 444 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:21:04,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 503 transitions. [2024-11-09 01:21:04,961 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 503 transitions. Word has length 238 [2024-11-09 01:21:04,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:21:04,962 INFO L471 AbstractCegarLoop]: Abstraction has 445 states and 503 transitions. [2024-11-09 01:21:04,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 6.324324324324325) internal successors, (468), 73 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:21:04,962 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 503 transitions. [2024-11-09 01:21:04,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2024-11-09 01:21:04,964 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:21:04,964 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:21:04,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-09 01:21:05,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:21:05,165 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:21:05,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:21:05,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1172582110, now seen corresponding path program 15 times [2024-11-09 01:21:05,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:21:05,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359599342] [2024-11-09 01:21:05,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:21:05,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:21:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:21:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2201 backedges. 1763 proven. 419 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 01:21:06,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:21:06,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359599342] [2024-11-09 01:21:06,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359599342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:21:06,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146200956] [2024-11-09 01:21:06,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:21:06,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:21:06,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:21:06,881 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:21:06,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-09 01:21:10,329 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:21:10,329 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:21:10,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 01:21:10,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:21:11,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2201 backedges. 1787 proven. 210 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-11-09 01:21:11,381 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:21:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2201 backedges. 1787 proven. 210 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-11-09 01:21:11,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146200956] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:21:11,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [674266029] [2024-11-09 01:21:11,975 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:21:11,975 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:21:11,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:21:11,976 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:21:11,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:21:14,757 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:21:17,193 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31208#(and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_821| Int)) (and (or (and (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_821| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_821| 4))) (= |v_ULTIMATE.start_diff_~j~0#1_821| |ULTIMATE.start_diff_~l2~0#1|) (<= 1 |v_ULTIMATE.start_diff_~j~0#1_821|) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_821| 4) (- 4)))))) (and (= |v_ULTIMATE.start_diff_~j~0#1_821| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_821|))) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))' at error location [2024-11-09 01:21:17,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:21:17,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:21:17,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 28, 28] total 47 [2024-11-09 01:21:17,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378817599] [2024-11-09 01:21:17,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:21:17,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-09 01:21:17,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:21:17,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-09 01:21:17,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=542, Invalid=3490, Unknown=0, NotChecked=0, Total=4032 [2024-11-09 01:21:17,198 INFO L87 Difference]: Start difference. First operand 445 states and 503 transitions. Second operand has 48 states, 48 states have (on average 8.145833333333334) internal successors, (391), 47 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:21:17,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:21:17,861 INFO L93 Difference]: Finished difference Result 2226 states and 2495 transitions. [2024-11-09 01:21:17,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-09 01:21:17,862 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 8.145833333333334) internal successors, (391), 47 states have internal predecessors, (391), 0 states have call successors, (0), 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 241 [2024-11-09 01:21:17,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:21:17,863 INFO L225 Difference]: With dead ends: 2226 [2024-11-09 01:21:17,863 INFO L226 Difference]: Without dead ends: 450 [2024-11-09 01:21:17,864 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 754 GetRequests, 666 SyntacticMatches, 26 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=542, Invalid=3490, Unknown=0, NotChecked=0, Total=4032 [2024-11-09 01:21:17,865 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 22 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 01:21:17,865 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 651 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 01:21:17,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2024-11-09 01:21:17,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2024-11-09 01:21:17,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.1319910514541387) internal successors, (506), 447 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:21:17,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 506 transitions. [2024-11-09 01:21:17,876 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 506 transitions. Word has length 241 [2024-11-09 01:21:17,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:21:17,876 INFO L471 AbstractCegarLoop]: Abstraction has 448 states and 506 transitions. [2024-11-09 01:21:17,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 8.145833333333334) internal successors, (391), 47 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:21:17,877 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 506 transitions. [2024-11-09 01:21:17,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2024-11-09 01:21:17,879 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:21:17,879 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:21:17,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-09 01:21:18,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:21:18,080 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:21:18,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:21:18,081 INFO L85 PathProgramCache]: Analyzing trace with hash -477065344, now seen corresponding path program 16 times [2024-11-09 01:21:18,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:21:18,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814321732] [2024-11-09 01:21:18,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:21:18,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:21:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:21:19,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2238 backedges. 1763 proven. 456 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 01:21:19,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:21:19,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814321732] [2024-11-09 01:21:19,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814321732] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:21:19,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689663284] [2024-11-09 01:21:19,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:21:19,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:21:19,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:21:19,862 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:21:19,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-09 01:21:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:21:20,253 INFO L255 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-09 01:21:20,258 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:21:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2238 backedges. 1850 proven. 247 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2024-11-09 01:21:21,292 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:21:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2238 backedges. 1850 proven. 247 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2024-11-09 01:21:21,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689663284] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:21:21,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [714068407] [2024-11-09 01:21:21,994 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:21:21,994 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:21:21,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:21:21,995 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:21:21,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:21:24,468 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:21:26,968 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35407#(and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))) (exists ((|v_ULTIMATE.start_diff_~j~0#1_895| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_895|) (or (and (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~j~0#1_895| 0)) (and (<= 1 |v_ULTIMATE.start_diff_~j~0#1_895|) (= |v_ULTIMATE.start_diff_~j~0#1_895| |ULTIMATE.start_diff_~l2~0#1|) (<= (+ (* |v_ULTIMATE.start_diff_~j~0#1_895| 4) |ULTIMATE.start_diff_~B#1.offset|) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ (* |v_ULTIMATE.start_diff_~j~0#1_895| 4) |ULTIMATE.start_diff_~B#1.offset| (- 4))))) (<= 4 (+ (* |v_ULTIMATE.start_diff_~j~0#1_895| 4) |ULTIMATE.start_diff_~B#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1))))))' at error location [2024-11-09 01:21:26,968 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:21:26,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:21:26,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 30, 30] total 50 [2024-11-09 01:21:26,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015937382] [2024-11-09 01:21:26,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:21:26,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-09 01:21:26,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:21:26,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-09 01:21:26,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=602, Invalid=3820, Unknown=0, NotChecked=0, Total=4422 [2024-11-09 01:21:26,971 INFO L87 Difference]: Start difference. First operand 448 states and 506 transitions. Second operand has 51 states, 51 states have (on average 8.019607843137255) internal successors, (409), 50 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:21:27,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:21:27,663 INFO L93 Difference]: Finished difference Result 2519 states and 2825 transitions. [2024-11-09 01:21:27,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-09 01:21:27,664 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 8.019607843137255) internal successors, (409), 50 states have internal predecessors, (409), 0 states have call successors, (0), 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 244 [2024-11-09 01:21:27,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:21:27,666 INFO L225 Difference]: With dead ends: 2519 [2024-11-09 01:21:27,666 INFO L226 Difference]: Without dead ends: 453 [2024-11-09 01:21:27,667 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 764 GetRequests, 671 SyntacticMatches, 28 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2154 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=602, Invalid=3820, Unknown=0, NotChecked=0, Total=4422 [2024-11-09 01:21:27,667 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 22 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 01:21:27,668 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 678 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 01:21:27,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2024-11-09 01:21:27,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 451. [2024-11-09 01:21:27,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.1311111111111112) internal successors, (509), 450 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:21:27,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 509 transitions. [2024-11-09 01:21:27,677 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 509 transitions. Word has length 244 [2024-11-09 01:21:27,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:21:27,677 INFO L471 AbstractCegarLoop]: Abstraction has 451 states and 509 transitions. [2024-11-09 01:21:27,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 8.019607843137255) internal successors, (409), 50 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:21:27,678 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 509 transitions. [2024-11-09 01:21:27,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2024-11-09 01:21:27,680 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:21:27,680 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:21:27,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-09 01:21:27,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:21:27,881 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:21:27,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:21:27,881 INFO L85 PathProgramCache]: Analyzing trace with hash -2108566626, now seen corresponding path program 17 times [2024-11-09 01:21:27,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:21:27,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214966910] [2024-11-09 01:21:27,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:21:27,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:21:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:21:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 1763 proven. 496 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 01:21:29,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:21:29,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214966910] [2024-11-09 01:21:29,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214966910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:21:29,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163037249] [2024-11-09 01:21:29,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:21:29,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:21:29,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:21:29,619 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:21:29,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-09 01:21:35,057 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2024-11-09 01:21:35,058 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:21:35,068 INFO L255 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-09 01:21:35,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:21:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 1240 proven. 947 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-09 01:21:36,865 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:21:38,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 1240 proven. 947 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-09 01:21:38,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163037249] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:21:38,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [630988898] [2024-11-09 01:21:38,328 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:21:38,328 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:21:38,328 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:21:38,328 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:21:38,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:21:40,367 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:21:42,906 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39955#(and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))) (exists ((|v_ULTIMATE.start_diff_~j~0#1_968| Int)) (and (or (and (= |v_ULTIMATE.start_diff_~j~0#1_968| |ULTIMATE.start_diff_~l2~0#1|) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_968| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_968| 4))) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_968| 4) (- 4))) (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))) (and (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~j~0#1_968| 0))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_968|))))' at error location [2024-11-09 01:21:42,906 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:21:42,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:21:42,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 85 [2024-11-09 01:21:42,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163237027] [2024-11-09 01:21:42,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:21:42,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-09 01:21:42,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:21:42,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-09 01:21:42,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1154, Invalid=9148, Unknown=0, NotChecked=0, Total=10302 [2024-11-09 01:21:42,910 INFO L87 Difference]: Start difference. First operand 451 states and 509 transitions. Second operand has 86 states, 86 states have (on average 6.046511627906977) internal successors, (520), 85 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:21:44,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:21:44,495 INFO L93 Difference]: Finished difference Result 2834 states and 3180 transitions. [2024-11-09 01:21:44,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-09 01:21:44,496 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 6.046511627906977) internal successors, (520), 85 states have internal predecessors, (520), 0 states have call successors, (0), 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 247 [2024-11-09 01:21:44,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:21:44,498 INFO L225 Difference]: With dead ends: 2834 [2024-11-09 01:21:44,498 INFO L226 Difference]: Without dead ends: 456 [2024-11-09 01:21:44,499 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 660 SyntacticMatches, 14 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6607 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1546, Invalid=12026, Unknown=0, NotChecked=0, Total=13572 [2024-11-09 01:21:44,499 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 32 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 1648 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 01:21:44,499 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 1110 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1648 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 01:21:44,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2024-11-09 01:21:44,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 454. [2024-11-09 01:21:44,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.130242825607064) internal successors, (512), 453 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:21:44,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 512 transitions. [2024-11-09 01:21:44,508 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 512 transitions. Word has length 247 [2024-11-09 01:21:44,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:21:44,508 INFO L471 AbstractCegarLoop]: Abstraction has 454 states and 512 transitions. [2024-11-09 01:21:44,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 6.046511627906977) internal successors, (520), 85 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:21:44,509 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 512 transitions. [2024-11-09 01:21:44,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2024-11-09 01:21:44,511 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:21:44,511 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:21:44,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-09 01:21:44,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-09 01:21:44,712 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:21:44,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:21:44,712 INFO L85 PathProgramCache]: Analyzing trace with hash -18369856, now seen corresponding path program 18 times [2024-11-09 01:21:44,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:21:44,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093932967] [2024-11-09 01:21:44,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:21:44,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:21:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:21:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2321 backedges. 1763 proven. 539 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 01:21:46,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:21:46,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093932967] [2024-11-09 01:21:46,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093932967] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:21:46,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759891810] [2024-11-09 01:21:46,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:21:46,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:21:46,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:21:46,225 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:21:46,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-09 01:21:50,330 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:21:50,330 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:21:50,339 INFO L255 TraceCheckSpWp]: Trace formula consists of 1101 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-09 01:21:50,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:21:51,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2321 backedges. 1937 proven. 330 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-09 01:21:51,519 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:21:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2321 backedges. 1937 proven. 330 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-09 01:21:52,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759891810] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:21:52,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1887901062] [2024-11-09 01:21:52,333 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:21:52,333 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:21:52,333 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:21:52,333 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:21:52,334 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:21:54,644 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:21:57,132 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '44837#(and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (exists ((|v_ULTIMATE.start_diff_~j~0#1_1041| Int)) (and (or (and (= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_1041|) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_1041| 4))))) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_1041| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_1041| 4))) (<= 1 |v_ULTIMATE.start_diff_~j~0#1_1041|)) (and (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~j~0#1_1041| 0))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_1041|))) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))' at error location [2024-11-09 01:21:57,132 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:21:57,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:21:57,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34, 34] total 53 [2024-11-09 01:21:57,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81771983] [2024-11-09 01:21:57,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:21:57,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-09 01:21:57,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:21:57,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-09 01:21:57,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=4147, Unknown=0, NotChecked=0, Total=4830 [2024-11-09 01:21:57,135 INFO L87 Difference]: Start difference. First operand 454 states and 512 transitions. Second operand has 54 states, 54 states have (on average 8.018518518518519) internal successors, (433), 53 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:21:57,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:21:57,830 INFO L93 Difference]: Finished difference Result 3171 states and 3560 transitions. [2024-11-09 01:21:57,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-09 01:21:57,831 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 8.018518518518519) internal successors, (433), 53 states have internal predecessors, (433), 0 states have call successors, (0), 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 250 [2024-11-09 01:21:57,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:21:57,832 INFO L225 Difference]: With dead ends: 3171 [2024-11-09 01:21:57,833 INFO L226 Difference]: Without dead ends: 459 [2024-11-09 01:21:57,833 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 684 SyntacticMatches, 32 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2255 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=683, Invalid=4147, Unknown=0, NotChecked=0, Total=4830 [2024-11-09 01:21:57,833 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 25 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 01:21:57,834 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 633 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 01:21:57,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2024-11-09 01:21:57,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 457. [2024-11-09 01:21:57,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.1293859649122806) internal successors, (515), 456 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:21:57,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 515 transitions. [2024-11-09 01:21:57,842 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 515 transitions. Word has length 250 [2024-11-09 01:21:57,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:21:57,843 INFO L471 AbstractCegarLoop]: Abstraction has 457 states and 515 transitions. [2024-11-09 01:21:57,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 8.018518518518519) internal successors, (433), 53 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:21:57,844 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 515 transitions. [2024-11-09 01:21:57,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2024-11-09 01:21:57,846 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:21:57,846 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:21:57,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-09 01:21:58,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-09 01:21:58,047 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:21:58,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:21:58,048 INFO L85 PathProgramCache]: Analyzing trace with hash 597747806, now seen corresponding path program 19 times [2024-11-09 01:21:58,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:21:58,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728405060] [2024-11-09 01:21:58,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:21:58,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:21:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:21:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2367 backedges. 1763 proven. 585 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 01:21:59,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:21:59,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728405060] [2024-11-09 01:21:59,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728405060] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:21:59,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981799498] [2024-11-09 01:21:59,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:21:59,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:21:59,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:21:59,881 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:21:59,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-09 01:22:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:22:00,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-09 01:22:00,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:22:01,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2367 backedges. 1961 proven. 376 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 01:22:01,719 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:22:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2367 backedges. 1961 proven. 376 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 01:22:02,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981799498] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:22:02,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [651484136] [2024-11-09 01:22:02,670 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:22:02,670 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:22:02,670 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:22:02,671 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:22:02,671 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:22:05,037 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:22:07,720 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '50049#(and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_1115| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_1115|) (or (and (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_1115| 4) (- 4))))) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_1115| 4))) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_1115| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_1115|)) (and (= |v_ULTIMATE.start_diff_~j~0#1_1115| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|))))) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))' at error location [2024-11-09 01:22:07,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:22:07,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:22:07,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 55 [2024-11-09 01:22:07,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280796183] [2024-11-09 01:22:07,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:22:07,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-09 01:22:07,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:22:07,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-09 01:22:07,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=4376, Unknown=0, NotChecked=0, Total=5112 [2024-11-09 01:22:07,722 INFO L87 Difference]: Start difference. First operand 457 states and 515 transitions. Second operand has 56 states, 56 states have (on average 7.982142857142857) internal successors, (447), 55 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:22:08,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:22:08,671 INFO L93 Difference]: Finished difference Result 3530 states and 3965 transitions. [2024-11-09 01:22:08,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-09 01:22:08,672 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 7.982142857142857) internal successors, (447), 55 states have internal predecessors, (447), 0 states have call successors, (0), 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 253 [2024-11-09 01:22:08,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:22:08,674 INFO L225 Difference]: With dead ends: 3530 [2024-11-09 01:22:08,674 INFO L226 Difference]: Without dead ends: 462 [2024-11-09 01:22:08,675 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 690 SyntacticMatches, 34 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2410 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=736, Invalid=4376, Unknown=0, NotChecked=0, Total=5112 [2024-11-09 01:22:08,675 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 24 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 01:22:08,676 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 976 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1408 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 01:22:08,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2024-11-09 01:22:08,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2024-11-09 01:22:08,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.1285403050108933) internal successors, (518), 459 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:22:08,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 518 transitions. [2024-11-09 01:22:08,684 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 518 transitions. Word has length 253 [2024-11-09 01:22:08,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:22:08,685 INFO L471 AbstractCegarLoop]: Abstraction has 460 states and 518 transitions. [2024-11-09 01:22:08,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 7.982142857142857) internal successors, (447), 55 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:22:08,685 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 518 transitions. [2024-11-09 01:22:08,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2024-11-09 01:22:08,687 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:22:08,688 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:22:08,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-09 01:22:08,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-09 01:22:08,889 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:22:08,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:22:08,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1331206656, now seen corresponding path program 20 times [2024-11-09 01:22:08,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:22:08,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710118123] [2024-11-09 01:22:08,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:22:08,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:22:08,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:22:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2416 backedges. 1763 proven. 634 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 01:22:10,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:22:10,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710118123] [2024-11-09 01:22:10,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710118123] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:22:10,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373907881] [2024-11-09 01:22:10,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:22:10,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:22:10,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:22:10,666 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:22:10,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-09 01:22:16,809 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-11-09 01:22:16,810 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:22:16,821 INFO L255 TraceCheckSpWp]: Trace formula consists of 1112 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-09 01:22:16,825 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:22:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2416 backedges. 1972 proven. 425 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 01:22:18,343 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:22:19,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2416 backedges. 1972 proven. 425 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 01:22:19,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373907881] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:22:19,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2115688424] [2024-11-09 01:22:19,316 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:22:19,316 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:22:19,317 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:22:19,317 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:22:19,317 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:22:21,304 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:22:23,843 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '55644#(and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (exists ((|v_ULTIMATE.start_diff_~j~0#1_1188| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_1188|) (or (and (= |v_ULTIMATE.start_diff_~j~0#1_1188| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|)) (and (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_1188| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_1188| 4))))) (= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_1188|) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_1188| 4))) (<= 1 |v_ULTIMATE.start_diff_~j~0#1_1188|))))) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))' at error location [2024-11-09 01:22:23,843 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:22:23,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:22:23,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 58 [2024-11-09 01:22:23,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207235234] [2024-11-09 01:22:23,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:22:23,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-09 01:22:23,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:22:23,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-09 01:22:23,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=812, Invalid=4738, Unknown=0, NotChecked=0, Total=5550 [2024-11-09 01:22:23,847 INFO L87 Difference]: Start difference. First operand 460 states and 518 transitions. Second operand has 59 states, 59 states have (on average 7.813559322033898) internal successors, (461), 58 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:22:24,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:22:24,724 INFO L93 Difference]: Finished difference Result 3911 states and 4395 transitions. [2024-11-09 01:22:24,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-09 01:22:24,725 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 7.813559322033898) internal successors, (461), 58 states have internal predecessors, (461), 0 states have call successors, (0), 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 256 [2024-11-09 01:22:24,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:22:24,727 INFO L225 Difference]: With dead ends: 3911 [2024-11-09 01:22:24,727 INFO L226 Difference]: Without dead ends: 465 [2024-11-09 01:22:24,728 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 695 SyntacticMatches, 36 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2807 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=812, Invalid=4738, Unknown=0, NotChecked=0, Total=5550 [2024-11-09 01:22:24,728 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 32 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 01:22:24,729 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 703 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 01:22:24,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2024-11-09 01:22:24,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 463. [2024-11-09 01:22:24,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 1.1277056277056277) internal successors, (521), 462 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:22:24,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 521 transitions. [2024-11-09 01:22:24,736 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 521 transitions. Word has length 256 [2024-11-09 01:22:24,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:22:24,737 INFO L471 AbstractCegarLoop]: Abstraction has 463 states and 521 transitions. [2024-11-09 01:22:24,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 7.813559322033898) internal successors, (461), 58 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:22:24,738 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 521 transitions. [2024-11-09 01:22:24,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2024-11-09 01:22:24,739 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:22:24,740 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:22:24,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-09 01:22:24,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-09 01:22:24,941 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:22:24,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:22:24,941 INFO L85 PathProgramCache]: Analyzing trace with hash -151163618, now seen corresponding path program 21 times [2024-11-09 01:22:24,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:22:24,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123040237] [2024-11-09 01:22:24,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:22:24,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:22:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:22:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 459 proven. 1991 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 01:22:29,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:22:29,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123040237] [2024-11-09 01:22:29,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123040237] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:22:29,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298759683] [2024-11-09 01:22:29,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:22:29,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:22:29,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:22:29,364 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:22:29,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-09 01:22:33,892 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:22:33,892 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:22:33,901 INFO L255 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-11-09 01:22:33,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:22:33,940 INFO L349 Elim1Store]: treesize reduction 56, result has 16.4 percent of original size [2024-11-09 01:22:33,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 29 [2024-11-09 01:22:33,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2024-11-09 01:22:39,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2024-11-09 01:22:44,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 459 proven. 1990 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 01:22:44,380 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:22:50,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 477 proven. 1972 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 01:22:50,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298759683] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:22:50,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1676869899] [2024-11-09 01:22:50,423 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:22:50,423 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:22:50,423 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:22:50,423 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:22:50,424 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:22:52,831 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:22:57,514 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '61696#(and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_1261| Int)) (and (or (and (= |v_ULTIMATE.start_diff_~j~0#1_1261| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|)) (and (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_1261| 4))))) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_1261| 4))) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_1261| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_1261|))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_1261|))) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))' at error location [2024-11-09 01:22:57,514 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:22:57,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:22:57,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 112 [2024-11-09 01:22:57,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947752506] [2024-11-09 01:22:57,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:22:57,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2024-11-09 01:22:57,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:22:57,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2024-11-09 01:22:57,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1491, Invalid=15279, Unknown=0, NotChecked=0, Total=16770 [2024-11-09 01:22:57,519 INFO L87 Difference]: Start difference. First operand 463 states and 521 transitions. Second operand has 114 states, 113 states have (on average 6.876106194690266) internal successors, (777), 113 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:23:03,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:23:03,204 INFO L93 Difference]: Finished difference Result 487 states and 548 transitions. [2024-11-09 01:23:03,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-09 01:23:03,205 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 113 states have (on average 6.876106194690266) internal successors, (777), 113 states have internal predecessors, (777), 0 states have call successors, (0), 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 259 [2024-11-09 01:23:03,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:23:03,208 INFO L225 Difference]: With dead ends: 487 [2024-11-09 01:23:03,208 INFO L226 Difference]: Without dead ends: 487 [2024-11-09 01:23:03,210 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 834 GetRequests, 685 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6845 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=2294, Invalid=20056, Unknown=0, NotChecked=0, Total=22350 [2024-11-09 01:23:03,210 INFO L432 NwaCegarLoop]: 149 mSDtfsCounter, 92 mSDsluCounter, 4224 mSDsCounter, 0 mSdLazyCounter, 3944 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 4373 SdHoareTripleChecker+Invalid, 3944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:23:03,211 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 4373 Invalid, 3944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3944 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-09 01:23:03,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2024-11-09 01:23:03,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 485. [2024-11-09 01:23:03,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 1.128099173553719) internal successors, (546), 484 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:23:03,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 546 transitions. [2024-11-09 01:23:03,218 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 546 transitions. Word has length 259 [2024-11-09 01:23:03,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:23:03,219 INFO L471 AbstractCegarLoop]: Abstraction has 485 states and 546 transitions. [2024-11-09 01:23:03,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 113 states have (on average 6.876106194690266) internal successors, (777), 113 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:23:03,219 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 546 transitions. [2024-11-09 01:23:03,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2024-11-09 01:23:03,222 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:23:03,222 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:23:03,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-09 01:23:03,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-09 01:23:03,423 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:23:03,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:23:03,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1100271505, now seen corresponding path program 22 times [2024-11-09 01:23:03,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:23:03,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444924455] [2024-11-09 01:23:03,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:23:03,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:23:03,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:23:06,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 1983 proven. 699 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 01:23:06,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:23:06,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444924455] [2024-11-09 01:23:06,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444924455] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:23:06,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231778041] [2024-11-09 01:23:06,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:23:06,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:23:06,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:23:06,015 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:23:06,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-09 01:23:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:23:06,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-09 01:23:06,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:23:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 2205 proven. 477 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 01:23:08,092 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:23:09,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 2205 proven. 477 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 01:23:09,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231778041] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:23:09,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [86850381] [2024-11-09 01:23:09,165 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:23:09,165 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:23:09,165 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:23:09,165 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:23:09,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:23:11,088 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:23:13,675 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '64399#(and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_1338| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_1338|) (or (and (= |v_ULTIMATE.start_diff_~j~0#1_1338| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|)) (and (= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_1338|) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (<= 4 (+ (* |v_ULTIMATE.start_diff_~j~0#1_1338| 4) |ULTIMATE.start_diff_~B#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= (+ (* |v_ULTIMATE.start_diff_~j~0#1_1338| 4) |ULTIMATE.start_diff_~B#1.offset|) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ (* |v_ULTIMATE.start_diff_~j~0#1_1338| 4) |ULTIMATE.start_diff_~B#1.offset| (- 4))) (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)))))))) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))' at error location [2024-11-09 01:23:13,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:23:13,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:23:13,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 60 [2024-11-09 01:23:13,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323811652] [2024-11-09 01:23:13,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:23:13,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-09 01:23:13,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:23:13,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-09 01:23:13,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=871, Invalid=4981, Unknown=0, NotChecked=0, Total=5852 [2024-11-09 01:23:13,678 INFO L87 Difference]: Start difference. First operand 485 states and 546 transitions. Second operand has 61 states, 61 states have (on average 7.901639344262295) internal successors, (482), 60 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:23:14,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:23:14,901 INFO L93 Difference]: Finished difference Result 4336 states and 4875 transitions. [2024-11-09 01:23:14,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-09 01:23:14,902 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 7.901639344262295) internal successors, (482), 60 states have internal predecessors, (482), 0 states have call successors, (0), 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 270 [2024-11-09 01:23:14,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:23:14,903 INFO L225 Difference]: With dead ends: 4336 [2024-11-09 01:23:14,903 INFO L226 Difference]: Without dead ends: 490 [2024-11-09 01:23:14,904 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 848 GetRequests, 735 SyntacticMatches, 38 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2806 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=871, Invalid=4981, Unknown=0, NotChecked=0, Total=5852 [2024-11-09 01:23:14,904 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 25 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 1948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:23:14,905 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 1359 Invalid, 1948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1948 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 01:23:14,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2024-11-09 01:23:14,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 488. [2024-11-09 01:23:14,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 1.1273100616016427) internal successors, (549), 487 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:23:14,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 549 transitions. [2024-11-09 01:23:14,912 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 549 transitions. Word has length 270 [2024-11-09 01:23:14,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:23:14,912 INFO L471 AbstractCegarLoop]: Abstraction has 488 states and 549 transitions. [2024-11-09 01:23:14,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 7.901639344262295) internal successors, (482), 60 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:23:14,912 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 549 transitions. [2024-11-09 01:23:14,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2024-11-09 01:23:14,914 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:23:14,914 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:23:14,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-09 01:23:15,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-09 01:23:15,115 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:23:15,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:23:15,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1091111471, now seen corresponding path program 23 times [2024-11-09 01:23:15,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:23:15,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927862258] [2024-11-09 01:23:15,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:23:15,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:23:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:23:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2757 backedges. 513 proven. 2225 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 01:23:20,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:23:20,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927862258] [2024-11-09 01:23:20,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927862258] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:23:20,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790450743] [2024-11-09 01:23:20,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:23:20,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:23:20,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:23:20,447 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:23:20,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-09 01:23:30,018 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2024-11-09 01:23:30,018 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:23:30,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 1184 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-09 01:23:30,051 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:23:30,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2024-11-09 01:23:30,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:23:30,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:23:30,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:23:30,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 01:23:30,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:23:30,160 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 01:23:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2757 backedges. 513 proven. 2224 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 01:23:40,645 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:23:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2757 backedges. 532 proven. 2205 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 01:23:46,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790450743] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:23:46,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1589273686] [2024-11-09 01:23:46,589 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:23:46,589 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:23:46,589 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:23:46,590 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:23:46,590 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:23:49,107 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:23:54,176 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '70991#(and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (exists ((|v_ULTIMATE.start_diff_~j~0#1_1415| Int)) (and (or (and (<= 4 (+ (* |v_ULTIMATE.start_diff_~j~0#1_1415| 4) |ULTIMATE.start_diff_~B#1.offset|)) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_1415|) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= (+ (* |v_ULTIMATE.start_diff_~j~0#1_1415| 4) |ULTIMATE.start_diff_~B#1.offset|) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ (* |v_ULTIMATE.start_diff_~j~0#1_1415| 4) |ULTIMATE.start_diff_~B#1.offset| (- 4))) (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))) (and (= |v_ULTIMATE.start_diff_~j~0#1_1415| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_1415|))) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))' at error location [2024-11-09 01:23:54,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:23:54,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:23:54,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 118 [2024-11-09 01:23:54,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319795794] [2024-11-09 01:23:54,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:23:54,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2024-11-09 01:23:54,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:23:54,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2024-11-09 01:23:54,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1905, Invalid=16455, Unknown=0, NotChecked=0, Total=18360 [2024-11-09 01:23:54,180 INFO L87 Difference]: Start difference. First operand 488 states and 549 transitions. Second operand has 120 states, 119 states have (on average 6.882352941176471) internal successors, (819), 119 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:24:01,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:24:01,568 INFO L93 Difference]: Finished difference Result 512 states and 576 transitions. [2024-11-09 01:24:01,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-09 01:24:01,568 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 119 states have (on average 6.882352941176471) internal successors, (819), 119 states have internal predecessors, (819), 0 states have call successors, (0), 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 273 [2024-11-09 01:24:01,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:24:01,570 INFO L225 Difference]: With dead ends: 512 [2024-11-09 01:24:01,570 INFO L226 Difference]: Without dead ends: 512 [2024-11-09 01:24:01,572 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 898 GetRequests, 723 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9015 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=3227, Invalid=27573, Unknown=0, NotChecked=0, Total=30800 [2024-11-09 01:24:01,572 INFO L432 NwaCegarLoop]: 157 mSDtfsCounter, 114 mSDsluCounter, 2354 mSDsCounter, 0 mSdLazyCounter, 2209 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 2511 SdHoareTripleChecker+Invalid, 2209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-09 01:24:01,572 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 2511 Invalid, 2209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2209 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-09 01:24:01,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2024-11-09 01:24:01,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 510. [2024-11-09 01:24:01,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.1277013752455796) internal successors, (574), 509 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:24:01,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 574 transitions. [2024-11-09 01:24:01,580 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 574 transitions. Word has length 273 [2024-11-09 01:24:01,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:24:01,580 INFO L471 AbstractCegarLoop]: Abstraction has 510 states and 574 transitions. [2024-11-09 01:24:01,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 119 states have (on average 6.882352941176471) internal successors, (819), 119 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:24:01,581 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 574 transitions. [2024-11-09 01:24:01,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2024-11-09 01:24:01,583 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:24:01,584 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:24:01,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-09 01:24:01,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:24:01,788 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:24:01,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:24:01,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1205931488, now seen corresponding path program 24 times [2024-11-09 01:24:01,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:24:01,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357964595] [2024-11-09 01:24:01,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:01,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:24:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3004 backedges. 2216 proven. 767 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 01:24:04,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:24:04,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357964595] [2024-11-09 01:24:04,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357964595] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:24:04,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649525093] [2024-11-09 01:24:04,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:24:04,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:24:04,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:24:04,083 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:24:04,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-09 01:24:20,591 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:24:20,591 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:24:20,601 INFO L255 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-09 01:24:20,605 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:24:22,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3004 backedges. 2451 proven. 532 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 01:24:22,182 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:24:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3004 backedges. 2451 proven. 532 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 01:24:23,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649525093] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:24:23,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1123472370] [2024-11-09 01:24:23,448 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:24:23,448 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:24:23,449 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:24:23,449 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:24:23,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:24:25,693 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:24:28,546 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '73871#(and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))) (exists ((|v_ULTIMATE.start_diff_~j~0#1_1495| Int)) (and (or (and (= |v_ULTIMATE.start_diff_~j~0#1_1495| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|)) (and (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_1495| 4))))) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_1495| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_1495|) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_1495| 4))))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_1495|))))' at error location [2024-11-09 01:24:28,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:24:28,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:24:28,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 63 [2024-11-09 01:24:28,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62095903] [2024-11-09 01:24:28,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:24:28,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-09 01:24:28,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:24:28,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-09 01:24:28,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=954, Invalid=5366, Unknown=0, NotChecked=0, Total=6320 [2024-11-09 01:24:28,548 INFO L87 Difference]: Start difference. First operand 510 states and 574 transitions. Second operand has 64 states, 64 states have (on average 7.921875) internal successors, (507), 63 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:24:29,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:24:29,452 INFO L93 Difference]: Finished difference Result 4783 states and 5380 transitions. [2024-11-09 01:24:29,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-09 01:24:29,453 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 7.921875) internal successors, (507), 63 states have internal predecessors, (507), 0 states have call successors, (0), 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 284 [2024-11-09 01:24:29,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:24:29,454 INFO L225 Difference]: With dead ends: 4783 [2024-11-09 01:24:29,454 INFO L226 Difference]: Without dead ends: 515 [2024-11-09 01:24:29,455 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 892 GetRequests, 774 SyntacticMatches, 40 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3052 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=954, Invalid=5366, Unknown=0, NotChecked=0, Total=6320 [2024-11-09 01:24:29,456 INFO L432 NwaCegarLoop]: 100 mSDtfsCounter, 36 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 01:24:29,456 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 828 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 01:24:29,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2024-11-09 01:24:29,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 513. [2024-11-09 01:24:29,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.126953125) internal successors, (577), 512 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:24:29,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 577 transitions. [2024-11-09 01:24:29,463 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 577 transitions. Word has length 284 [2024-11-09 01:24:29,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:24:29,463 INFO L471 AbstractCegarLoop]: Abstraction has 513 states and 577 transitions. [2024-11-09 01:24:29,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 7.921875) internal successors, (507), 63 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:24:29,464 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 577 transitions. [2024-11-09 01:24:29,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2024-11-09 01:24:29,465 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:24:29,465 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:24:29,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-09 01:24:29,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:24:29,666 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:24:29,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:24:29,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1473469438, now seen corresponding path program 25 times [2024-11-09 01:24:29,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:24:29,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174814851] [2024-11-09 01:24:29,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:29,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:24:29,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:34,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3062 backedges. 570 proven. 2472 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 01:24:34,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:24:34,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174814851] [2024-11-09 01:24:34,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174814851] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:24:34,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736523095] [2024-11-09 01:24:34,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:24:34,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:24:34,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:24:34,371 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:24:34,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-09 01:24:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:34,869 INFO L255 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-09 01:24:34,876 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:24:34,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 01:24:34,905 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-09 01:24:34,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2024-11-09 01:24:34,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2024-11-09 01:24:47,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3062 backedges. 0 proven. 2452 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2024-11-09 01:24:47,135 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:24:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3062 backedges. 1 proven. 2451 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2024-11-09 01:24:56,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736523095] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:24:56,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1923156895] [2024-11-09 01:24:56,455 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:24:56,455 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:24:56,456 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:24:56,456 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:24:56,456 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:24:58,503 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:25:04,191 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '81025#(and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_1574| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_1574|) (or (and (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~j~0#1_1574| 0)) (and (<= 1 |v_ULTIMATE.start_diff_~j~0#1_1574|) (= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_1574|) (<= (+ (* |v_ULTIMATE.start_diff_~j~0#1_1574| 4) |ULTIMATE.start_diff_~B#1.offset|) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ (* |v_ULTIMATE.start_diff_~j~0#1_1574| 4) |ULTIMATE.start_diff_~B#1.offset| (- 4))))) (<= 4 (+ (* |v_ULTIMATE.start_diff_~j~0#1_1574| 4) |ULTIMATE.start_diff_~B#1.offset|)))))) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))' at error location [2024-11-09 01:25:04,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:25:04,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:25:04,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 124 [2024-11-09 01:25:04,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225168358] [2024-11-09 01:25:04,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:25:04,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2024-11-09 01:25:04,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:25:04,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2024-11-09 01:25:04,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2114, Invalid=17908, Unknown=0, NotChecked=0, Total=20022 [2024-11-09 01:25:04,195 INFO L87 Difference]: Start difference. First operand 513 states and 577 transitions. Second operand has 126 states, 125 states have (on average 5.976) internal successors, (747), 125 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:25:42,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:25:42,869 INFO L93 Difference]: Finished difference Result 1221 states and 1345 transitions. [2024-11-09 01:25:42,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2024-11-09 01:25:42,870 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 125 states have (on average 5.976) internal successors, (747), 125 states have internal predecessors, (747), 0 states have call successors, (0), 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 287 [2024-11-09 01:25:42,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:25:42,873 INFO L225 Difference]: With dead ends: 1221 [2024-11-09 01:25:42,873 INFO L226 Difference]: Without dead ends: 1221 [2024-11-09 01:25:42,875 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1017 GetRequests, 761 SyntacticMatches, 1 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19540 ImplicationChecksByTransitivity, 48.2s TimeCoverageRelationStatistics Valid=9649, Invalid=56143, Unknown=0, NotChecked=0, Total=65792 [2024-11-09 01:25:42,876 INFO L432 NwaCegarLoop]: 105 mSDtfsCounter, 660 mSDsluCounter, 5272 mSDsCounter, 0 mSdLazyCounter, 11574 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 5377 SdHoareTripleChecker+Invalid, 11576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2024-11-09 01:25:42,876 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 5377 Invalid, 11576 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 11574 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2024-11-09 01:25:42,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2024-11-09 01:25:42,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 953. [2024-11-09 01:25:42,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 1.1313025210084033) internal successors, (1077), 952 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:25:42,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1077 transitions. [2024-11-09 01:25:42,888 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1077 transitions. Word has length 287 [2024-11-09 01:25:42,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:25:42,889 INFO L471 AbstractCegarLoop]: Abstraction has 953 states and 1077 transitions. [2024-11-09 01:25:42,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 125 states have (on average 5.976) internal successors, (747), 125 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:25:42,890 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1077 transitions. [2024-11-09 01:25:42,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2024-11-09 01:25:42,894 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:25:42,894 INFO L215 NwaCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 40, 40, 39, 39, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:25:42,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-09 01:25:43,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-09 01:25:43,095 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:25:43,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:25:43,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1986119362, now seen corresponding path program 26 times [2024-11-09 01:25:43,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:25:43,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273749839] [2024-11-09 01:25:43,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:25:43,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:25:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:25:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10732 backedges. 9606 proven. 1085 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-09 01:25:47,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:25:47,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273749839] [2024-11-09 01:25:47,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273749839] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:25:47,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690064938] [2024-11-09 01:25:47,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:25:47,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:25:47,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:25:47,717 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:25:47,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-09 01:26:04,742 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2024-11-09 01:26:04,743 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:26:04,758 INFO L255 TraceCheckSpWp]: Trace formula consists of 1408 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-09 01:26:04,765 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:26:08,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10732 backedges. 2804 proven. 5551 refuted. 0 times theorem prover too weak. 2377 trivial. 0 not checked. [2024-11-09 01:26:08,249 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:26:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10732 backedges. 2804 proven. 5551 refuted. 0 times theorem prover too weak. 2377 trivial. 0 not checked. [2024-11-09 01:26:11,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690064938] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:26:11,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1586371903] [2024-11-09 01:26:11,201 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:26:11,201 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:26:11,201 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:26:11,201 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:26:11,201 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:26:13,459 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:26:17,064 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '86613#(and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))) (exists ((|v_ULTIMATE.start_diff_~j~0#1_1713| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_1713|) (or (and (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_1713| 4))))) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_1713|) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_1713| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_1713| 4)))) (and (= |v_ULTIMATE.start_diff_~j~0#1_1713| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|))))))' at error location [2024-11-09 01:26:17,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:26:17,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:26:17,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 45, 45] total 131 [2024-11-09 01:26:17,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137250350] [2024-11-09 01:26:17,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:26:17,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2024-11-09 01:26:17,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:26:17,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2024-11-09 01:26:17,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2625, Invalid=19131, Unknown=0, NotChecked=0, Total=21756 [2024-11-09 01:26:17,068 INFO L87 Difference]: Start difference. First operand 953 states and 1077 transitions. Second operand has 132 states, 132 states have (on average 6.742424242424242) internal successors, (890), 131 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:26:19,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:26:19,957 INFO L93 Difference]: Finished difference Result 5670 states and 6385 transitions. [2024-11-09 01:26:19,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-09 01:26:19,958 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 6.742424242424242) internal successors, (890), 131 states have internal predecessors, (890), 0 states have call successors, (0), 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 507 [2024-11-09 01:26:19,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:26:19,960 INFO L225 Difference]: With dead ends: 5670 [2024-11-09 01:26:19,960 INFO L226 Difference]: Without dead ends: 958 [2024-11-09 01:26:19,962 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1604 GetRequests, 1416 SyntacticMatches, 20 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13963 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=3427, Invalid=25303, Unknown=0, NotChecked=0, Total=28730 [2024-11-09 01:26:19,962 INFO L432 NwaCegarLoop]: 105 mSDtfsCounter, 34 mSDsluCounter, 2275 mSDsCounter, 0 mSdLazyCounter, 3449 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 2380 SdHoareTripleChecker+Invalid, 3449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-09 01:26:19,962 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 2380 Invalid, 3449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3449 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-09 01:26:19,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2024-11-09 01:26:20,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 956. [2024-11-09 01:26:20,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 1.130890052356021) internal successors, (1080), 955 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:26:20,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1080 transitions. [2024-11-09 01:26:20,014 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1080 transitions. Word has length 507 [2024-11-09 01:26:20,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:26:20,017 INFO L471 AbstractCegarLoop]: Abstraction has 956 states and 1080 transitions. [2024-11-09 01:26:20,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 6.742424242424242) internal successors, (890), 131 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:26:20,018 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1080 transitions. [2024-11-09 01:26:20,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2024-11-09 01:26:20,023 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:26:20,023 INFO L215 NwaCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 40, 40, 39, 39, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:26:20,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-11-09 01:26:20,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-09 01:26:20,224 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:26:20,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:26:20,225 INFO L85 PathProgramCache]: Analyzing trace with hash 822310752, now seen corresponding path program 27 times [2024-11-09 01:26:20,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:26:20,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96123571] [2024-11-09 01:26:20,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:26:20,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:26:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:26:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10793 backedges. 9606 proven. 1146 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-09 01:26:24,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:26:24,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96123571] [2024-11-09 01:26:24,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96123571] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:26:24,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564596642] [2024-11-09 01:26:24,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:26:24,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:26:24,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:26:24,937 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:26:24,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84edd00a-a368-418b-a562-0930783b6ded/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process