./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_init6_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_init6_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ff138f81519ab5ff475befdf624922816837c8f1983c223aa78c0525de509876 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:50:55,312 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:50:55,380 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:50:55,386 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:50:55,387 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:50:55,414 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:50:55,415 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:50:55,416 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:50:55,416 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:50:55,417 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:50:55,418 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:50:55,418 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:50:55,419 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:50:55,419 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:50:55,420 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:50:55,421 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:50:55,421 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:50:55,422 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:50:55,422 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:50:55,423 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:50:55,423 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:50:55,429 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:50:55,429 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:50:55,430 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:50:55,431 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:50:55,431 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:50:55,436 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:50:55,436 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:50:55,437 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:50:55,437 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:50:55,438 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:50:55,439 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:50:55,439 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:50:55,440 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:50:55,440 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:50:55,440 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:50:55,440 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:50:55,441 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:50:55,441 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:50:55,450 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:50:55,450 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:50:55,451 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:50:55,451 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:50:55,451 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:50:55,452 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:50:55,452 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_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff138f81519ab5ff475befdf624922816837c8f1983c223aa78c0525de509876 [2023-11-12 00:50:55,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:50:55,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:50:55,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:50:55,796 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:50:55,797 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:50:55,799 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/array-examples/standard_init6_ground-1.i [2023-11-12 00:50:58,912 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:50:59,106 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:50:59,107 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/sv-benchmarks/c/array-examples/standard_init6_ground-1.i [2023-11-12 00:50:59,117 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/data/a7805b296/56d928949d8e4342a9cd024f4e01fb3a/FLAG59a8bf788 [2023-11-12 00:50:59,137 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/data/a7805b296/56d928949d8e4342a9cd024f4e01fb3a [2023-11-12 00:50:59,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:50:59,150 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:50:59,154 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:50:59,154 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:50:59,160 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:50:59,161 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:50:59" (1/1) ... [2023-11-12 00:50:59,162 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@710a5d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:59, skipping insertion in model container [2023-11-12 00:50:59,162 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:50:59" (1/1) ... [2023-11-12 00:50:59,192 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:50:59,348 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/sv-benchmarks/c/array-examples/standard_init6_ground-1.i[816,829] [2023-11-12 00:50:59,368 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:50:59,379 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:50:59,393 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/sv-benchmarks/c/array-examples/standard_init6_ground-1.i[816,829] [2023-11-12 00:50:59,422 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:50:59,442 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:50:59,443 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:59 WrapperNode [2023-11-12 00:50:59,443 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:50:59,444 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:50:59,445 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:50:59,445 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:50:59,453 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:59" (1/1) ... [2023-11-12 00:50:59,462 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:59" (1/1) ... [2023-11-12 00:50:59,490 INFO L138 Inliner]: procedures = 15, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 74 [2023-11-12 00:50:59,490 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:50:59,491 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:50:59,491 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:50:59,491 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:50:59,501 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:59" (1/1) ... [2023-11-12 00:50:59,502 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:59" (1/1) ... [2023-11-12 00:50:59,513 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:59" (1/1) ... [2023-11-12 00:50:59,514 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:59" (1/1) ... [2023-11-12 00:50:59,519 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:59" (1/1) ... [2023-11-12 00:50:59,523 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:59" (1/1) ... [2023-11-12 00:50:59,526 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:59" (1/1) ... [2023-11-12 00:50:59,527 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:59" (1/1) ... [2023-11-12 00:50:59,539 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:50:59,540 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:50:59,540 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:50:59,540 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:50:59,541 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:59" (1/1) ... [2023-11-12 00:50:59,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:50:59,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:59,571 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:50:59,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:50:59,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:50:59,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:50:59,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:50:59,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:50:59,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:50:59,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:50:59,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:50:59,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:50:59,711 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:50:59,714 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:50:59,903 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:50:59,972 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:50:59,973 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-12 00:50:59,977 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:50:59 BoogieIcfgContainer [2023-11-12 00:50:59,977 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:50:59,980 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:50:59,980 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:50:59,984 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:50:59,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:50:59" (1/3) ... [2023-11-12 00:50:59,985 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77d39bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:50:59, skipping insertion in model container [2023-11-12 00:50:59,985 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:59" (2/3) ... [2023-11-12 00:50:59,986 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77d39bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:50:59, skipping insertion in model container [2023-11-12 00:50:59,986 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:50:59" (3/3) ... [2023-11-12 00:50:59,988 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-1.i [2023-11-12 00:51:00,017 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:51:00,018 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:51:00,094 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:51:00,102 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@77bdb7cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:51:00,104 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:51:00,108 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:00,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 00:51:00,116 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:00,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:51:00,118 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:00,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:00,129 INFO L85 PathProgramCache]: Analyzing trace with hash -726267091, now seen corresponding path program 1 times [2023-11-12 00:51:00,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:00,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339146946] [2023-11-12 00:51:00,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:00,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:51:00,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:00,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339146946] [2023-11-12 00:51:00,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339146946] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:51:00,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:51:00,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:51:00,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922510823] [2023-11-12 00:51:00,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:51:00,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:51:00,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:00,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:51:00,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:51:00,479 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:00,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:00,593 INFO L93 Difference]: Finished difference Result 30 states and 49 transitions. [2023-11-12 00:51:00,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:51:00,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-12 00:51:00,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:00,603 INFO L225 Difference]: With dead ends: 30 [2023-11-12 00:51:00,603 INFO L226 Difference]: Without dead ends: 18 [2023-11-12 00:51:00,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:51:00,611 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:00,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:51:00,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-12 00:51:00,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-12 00:51:00,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:00,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2023-11-12 00:51:00,650 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 10 [2023-11-12 00:51:00,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:00,651 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2023-11-12 00:51:00,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:00,652 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2023-11-12 00:51:00,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-12 00:51:00,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:00,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:51:00,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:51:00,653 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:00,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:00,654 INFO L85 PathProgramCache]: Analyzing trace with hash -859914488, now seen corresponding path program 1 times [2023-11-12 00:51:00,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:00,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730608079] [2023-11-12 00:51:00,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:00,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:00,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 00:51:00,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:00,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730608079] [2023-11-12 00:51:00,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730608079] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:51:00,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679118951] [2023-11-12 00:51:00,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:00,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:00,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:00,840 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:00,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:51:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:00,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:51:00,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 00:51:00,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:51:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 00:51:01,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679118951] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:51:01,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [644295840] [2023-11-12 00:51:01,075 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-12 00:51:01,075 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:51:01,080 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:51:01,086 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:51:01,088 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:51:01,860 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:51:01,961 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '196#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_#t~mem2#1| 46)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem2#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)))' at error location [2023-11-12 00:51:01,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:51:01,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:51:01,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 00:51:01,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569506931] [2023-11-12 00:51:01,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:51:01,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:51:01,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:01,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:51:01,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:51:01,965 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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) [2023-11-12 00:51:02,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:02,060 INFO L93 Difference]: Finished difference Result 51 states and 80 transitions. [2023-11-12 00:51:02,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:51:02,061 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 16 [2023-11-12 00:51:02,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:02,062 INFO L225 Difference]: With dead ends: 51 [2023-11-12 00:51:02,062 INFO L226 Difference]: Without dead ends: 36 [2023-11-12 00:51:02,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:51:02,064 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:02,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:51:02,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-12 00:51:02,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-12 00:51:02,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:02,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2023-11-12 00:51:02,073 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 16 [2023-11-12 00:51:02,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:02,073 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2023-11-12 00:51:02,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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) [2023-11-12 00:51:02,074 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2023-11-12 00:51:02,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-12 00:51:02,075 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:02,075 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:51:02,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:51:02,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:02,281 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:02,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:02,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1324179091, now seen corresponding path program 2 times [2023-11-12 00:51:02,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:02,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508550338] [2023-11-12 00:51:02,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:02,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:02,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:02,559 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-12 00:51:02,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:02,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508550338] [2023-11-12 00:51:02,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508550338] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:51:02,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049447418] [2023-11-12 00:51:02,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:51:02,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:02,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:02,561 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:02,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:51:02,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 00:51:02,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:51:02,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:51:02,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:02,732 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-12 00:51:02,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:51:02,797 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-12 00:51:02,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049447418] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:51:02,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1474295658] [2023-11-12 00:51:02,800 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-12 00:51:02,800 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:51:02,801 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:51:02,801 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:51:02,802 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:51:03,095 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:51:03,203 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '571#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_#t~mem2#1| 46)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem2#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)))' at error location [2023-11-12 00:51:03,203 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:51:03,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:51:03,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2023-11-12 00:51:03,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508155911] [2023-11-12 00:51:03,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:51:03,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 00:51:03,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:03,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 00:51:03,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:51:03,207 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:03,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:03,395 INFO L93 Difference]: Finished difference Result 102 states and 149 transitions. [2023-11-12 00:51:03,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 00:51:03,395 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-12 00:51:03,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:03,397 INFO L225 Difference]: With dead ends: 102 [2023-11-12 00:51:03,397 INFO L226 Difference]: Without dead ends: 72 [2023-11-12 00:51:03,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:51:03,399 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:03,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:51:03,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-12 00:51:03,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-11-12 00:51:03,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:03,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2023-11-12 00:51:03,412 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 34 [2023-11-12 00:51:03,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:03,412 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2023-11-12 00:51:03,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:03,413 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2023-11-12 00:51:03,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-12 00:51:03,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:03,416 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:51:03,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:51:03,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:03,622 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:03,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:03,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1810345677, now seen corresponding path program 3 times [2023-11-12 00:51:03,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:03,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214697096] [2023-11-12 00:51:03,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:03,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-12 00:51:04,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:04,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214697096] [2023-11-12 00:51:04,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214697096] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:51:04,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707405521] [2023-11-12 00:51:04,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:51:04,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:04,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:04,233 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:04,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:51:04,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:51:04,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:51:04,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 00:51:04,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-12 00:51:04,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:51:04,707 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-12 00:51:04,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707405521] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:51:04,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [956912720] [2023-11-12 00:51:04,711 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-12 00:51:04,711 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:51:04,711 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:51:04,712 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:51:04,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:51:04,987 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:51:05,123 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1348#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_#t~mem2#1| 46)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem2#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)))' at error location [2023-11-12 00:51:05,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:51:05,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:51:05,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-12 00:51:05,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658127051] [2023-11-12 00:51:05,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:51:05,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 00:51:05,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:05,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 00:51:05,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2023-11-12 00:51:05,127 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:05,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:05,569 INFO L93 Difference]: Finished difference Result 204 states and 287 transitions. [2023-11-12 00:51:05,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 00:51:05,570 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2023-11-12 00:51:05,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:05,571 INFO L225 Difference]: With dead ends: 204 [2023-11-12 00:51:05,572 INFO L226 Difference]: Without dead ends: 144 [2023-11-12 00:51:05,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2023-11-12 00:51:05,574 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:05,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:51:05,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-11-12 00:51:05,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2023-11-12 00:51:05,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.048951048951049) internal successors, (150), 143 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:05,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 150 transitions. [2023-11-12 00:51:05,594 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 150 transitions. Word has length 70 [2023-11-12 00:51:05,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:05,595 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 150 transitions. [2023-11-12 00:51:05,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:05,595 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 150 transitions. [2023-11-12 00:51:05,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-11-12 00:51:05,598 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:05,598 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:51:05,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:51:05,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:05,811 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:05,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:05,812 INFO L85 PathProgramCache]: Analyzing trace with hash -500825715, now seen corresponding path program 4 times [2023-11-12 00:51:05,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:05,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287308552] [2023-11-12 00:51:05,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:05,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2023-11-12 00:51:07,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:07,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287308552] [2023-11-12 00:51:07,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287308552] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:51:07,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432235417] [2023-11-12 00:51:07,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:51:07,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:07,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:07,437 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:07,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:51:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:07,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 00:51:07,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2023-11-12 00:51:07,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:51:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2023-11-12 00:51:08,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432235417] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:51:08,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1406213626] [2023-11-12 00:51:08,806 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-12 00:51:08,806 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:51:08,806 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:51:08,806 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:51:08,807 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:51:09,076 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:51:09,244 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2929#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_#t~mem2#1| 46)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem2#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)))' at error location [2023-11-12 00:51:09,244 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:51:09,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:51:09,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-11-12 00:51:09,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232994295] [2023-11-12 00:51:09,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:51:09,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-12 00:51:09,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:09,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-12 00:51:09,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2023-11-12 00:51:09,254 INFO L87 Difference]: Start difference. First operand 144 states and 150 transitions. Second operand has 49 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 48 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:10,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:10,528 INFO L93 Difference]: Finished difference Result 408 states and 563 transitions. [2023-11-12 00:51:10,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-12 00:51:10,528 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 48 states have internal predecessors, (63), 0 states have call successors, (0), 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 142 [2023-11-12 00:51:10,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:10,535 INFO L225 Difference]: With dead ends: 408 [2023-11-12 00:51:10,535 INFO L226 Difference]: Without dead ends: 288 [2023-11-12 00:51:10,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2023-11-12 00:51:10,539 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 1231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1231 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:10,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1231 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:51:10,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-11-12 00:51:10,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2023-11-12 00:51:10,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.024390243902439) internal successors, (294), 287 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:10,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 294 transitions. [2023-11-12 00:51:10,595 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 294 transitions. Word has length 142 [2023-11-12 00:51:10,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:10,597 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 294 transitions. [2023-11-12 00:51:10,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 48 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:10,597 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 294 transitions. [2023-11-12 00:51:10,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-11-12 00:51:10,613 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:10,614 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:51:10,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:51:10,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:10,822 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:10,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:10,823 INFO L85 PathProgramCache]: Analyzing trace with hash -870611187, now seen corresponding path program 5 times [2023-11-12 00:51:10,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:10,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056789718] [2023-11-12 00:51:10,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:10,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:11,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:15,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6486 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 5405 trivial. 0 not checked. [2023-11-12 00:51:15,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:15,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056789718] [2023-11-12 00:51:15,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056789718] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:51:15,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850148917] [2023-11-12 00:51:15,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:51:15,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:15,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:15,737 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:15,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73e06cf9-c965-48ea-b623-c9b6d7c5b96b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process