./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/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_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/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_5bf3d330-429f-4c75-9fbd-74a87312fa82/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 08a64b64599ceefef00723a17bd9cad66dbb7d4e6f08f1e5c61a19e368f8af19 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:00:55,511 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:00:55,592 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 01:00:55,598 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:00:55,599 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:00:55,625 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:00:55,626 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:00:55,626 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:00:55,627 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:00:55,628 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:00:55,629 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:00:55,629 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:00:55,630 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:00:55,631 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:00:55,631 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:00:55,632 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:00:55,632 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:00:55,633 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:00:55,634 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:00:55,634 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:00:55,635 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:00:55,636 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:00:55,637 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:00:55,637 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:00:55,638 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 01:00:55,638 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:00:55,639 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 01:00:55,639 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:00:55,640 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:00:55,640 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:00:55,640 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:00:55,641 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 01:00:55,641 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:00:55,642 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:00:55,642 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:00:55,643 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:00:55,643 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:00:55,644 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:00:55,644 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:00:55,644 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:00:55,645 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:00:55,645 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:00:55,645 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:00:55,645 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:00:55,646 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:00:55,646 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_5bf3d330-429f-4c75-9fbd-74a87312fa82/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 08a64b64599ceefef00723a17bd9cad66dbb7d4e6f08f1e5c61a19e368f8af19 [2023-11-12 01:00:55,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:00:55,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:00:55,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:00:55,989 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:00:55,990 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:00:55,992 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i [2023-11-12 01:00:59,062 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:00:59,318 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:00:59,319 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i [2023-11-12 01:00:59,327 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/data/a14b5d156/2e58ec02cbb044b7a764c7fa60b5a0ba/FLAG5f3ed7e4c [2023-11-12 01:00:59,341 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/data/a14b5d156/2e58ec02cbb044b7a764c7fa60b5a0ba [2023-11-12 01:00:59,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:00:59,345 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:00:59,346 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:00:59,347 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:00:59,356 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:00:59,357 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:00:59" (1/1) ... [2023-11-12 01:00:59,358 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22170f94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59, skipping insertion in model container [2023-11-12 01:00:59,359 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:00:59" (1/1) ... [2023-11-12 01:00:59,382 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:00:59,564 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_5bf3d330-429f-4c75-9fbd-74a87312fa82/sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i[998,1011] [2023-11-12 01:00:59,592 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:00:59,608 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:00:59,629 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_5bf3d330-429f-4c75-9fbd-74a87312fa82/sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i[998,1011] [2023-11-12 01:00:59,657 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:00:59,680 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:00:59,681 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59 WrapperNode [2023-11-12 01:00:59,681 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:00:59,682 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:00:59,683 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:00:59,683 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:00:59,691 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59" (1/1) ... [2023-11-12 01:00:59,700 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59" (1/1) ... [2023-11-12 01:00:59,721 INFO L138 Inliner]: procedures = 19, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2023-11-12 01:00:59,722 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:00:59,723 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:00:59,723 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:00:59,723 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:00:59,733 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59" (1/1) ... [2023-11-12 01:00:59,734 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59" (1/1) ... [2023-11-12 01:00:59,738 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59" (1/1) ... [2023-11-12 01:00:59,738 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59" (1/1) ... [2023-11-12 01:00:59,745 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59" (1/1) ... [2023-11-12 01:00:59,758 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59" (1/1) ... [2023-11-12 01:00:59,759 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59" (1/1) ... [2023-11-12 01:00:59,761 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59" (1/1) ... [2023-11-12 01:00:59,764 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:00:59,765 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:00:59,765 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:00:59,765 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:00:59,773 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59" (1/1) ... [2023-11-12 01:00:59,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:00:59,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:59,812 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:00:59,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:00:59,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 01:00:59,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:00:59,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:00:59,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 01:00:59,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 01:00:59,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 01:00:59,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:00:59,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:00:59,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 01:01:00,005 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:01:00,008 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:01:00,250 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:01:00,419 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:01:00,419 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 01:01:00,421 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:01:00 BoogieIcfgContainer [2023-11-12 01:01:00,421 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:01:00,424 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:01:00,424 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:01:00,428 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:01:00,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:00:59" (1/3) ... [2023-11-12 01:01:00,429 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b19a81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:01:00, skipping insertion in model container [2023-11-12 01:01:00,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59" (2/3) ... [2023-11-12 01:01:00,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b19a81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:01:00, skipping insertion in model container [2023-11-12 01:01:00,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:01:00" (3/3) ... [2023-11-12 01:01:00,431 INFO L112 eAbstractionObserver]: Analyzing ICFG array_ptr_single_elem_init-1.i [2023-11-12 01:01:00,453 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:01:00,453 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 01:01:00,500 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:01:00,508 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;@3dc2f6c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:01:00,508 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 01:01:00,515 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:00,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 01:01:00,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:00,527 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 01:01:00,528 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:00,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:00,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1150624467, now seen corresponding path program 1 times [2023-11-12 01:01:00,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:00,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313458493] [2023-11-12 01:01:00,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:00,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:00,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:00,807 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 01:01:00,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:00,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313458493] [2023-11-12 01:01:00,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313458493] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:00,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:00,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:01:00,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328223284] [2023-11-12 01:01:00,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:00,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:00,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:00,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:00,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:00,858 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:00,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:00,919 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2023-11-12 01:01:00,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:00,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-12 01:01:00,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:00,930 INFO L225 Difference]: With dead ends: 26 [2023-11-12 01:01:00,933 INFO L226 Difference]: Without dead ends: 17 [2023-11-12 01:01:00,936 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 01:01:00,940 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:00,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 12 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:01:00,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-12 01:01:00,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 10. [2023-11-12 01:01:00,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:00,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2023-11-12 01:01:00,978 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2023-11-12 01:01:00,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:00,979 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2023-11-12 01:01:00,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:00,979 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2023-11-12 01:01:00,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 01:01:00,980 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:00,980 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:00,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:01:00,981 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:00,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:00,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1163706679, now seen corresponding path program 1 times [2023-11-12 01:01:00,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:00,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902238296] [2023-11-12 01:01:00,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:00,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:01,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:01,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902238296] [2023-11-12 01:01:01,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902238296] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:01,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391946401] [2023-11-12 01:01:01,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:01,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:01,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:01,282 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:01,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:01:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:01,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 01:01:01,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:01,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:01:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:01,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391946401] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:01:01,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1690320878] [2023-11-12 01:01:01,509 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 01:01:01,510 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:01:01,513 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:01:01,520 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:01:01,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:01:03,655 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:01:04,031 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '102#(and (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s1~0#1.base|) |ULTIMATE.start_main_~s1~0#1.offset|) 0) (exists ((|v_#memory_$Pointer$.base_60| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_60| |~#a~0.base| (store (select |v_#memory_$Pointer$.base_60| |~#a~0.base|) (+ 12 |~#a~0.offset|) (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)))))) (= |ULTIMATE.start_main_~i~0#1| 0) (exists ((|v_#memory_int_56| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_56| |~#a~0.base| (store (select |v_#memory_int_56| |~#a~0.base|) (+ 12 |~#a~0.offset|) (select (select |#memory_int| |~#a~0.base|) (+ 12 |~#a~0.offset|)))))) (exists ((|v_#length_40| (Array Int Int))) (= |#length| (store |v_#length_40| (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)) 8))) (or (not (= |ULTIMATE.start_main_~s1~0#1.offset| 0)) (not (= |ULTIMATE.start_main_~s1~0#1.base| 0))) (= |ULTIMATE.start_main_#t~mem11#1.offset| 0) (= |ULTIMATE.start_main_~s1~0#1.offset| (select (select |#memory_$Pointer$.offset| |~#a~0.base|) |~#a~0.offset|)) (= |ULTIMATE.start_main_#t~mem11#1.base| 0) (exists ((|v_#valid_40| (Array Int Int))) (and (= (select |v_#valid_40| (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|))) 0) (= (store |v_#valid_40| (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)) 1) |#valid|))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s1~0#1.base|) |ULTIMATE.start_main_~s1~0#1.offset|) 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~s1~0#1.base|) (+ |ULTIMATE.start_main_~s1~0#1.offset| 4)) 0) (not (= (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)) 0)) (<= (+ (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)) 1) |#StackHeapBarrier|) (= |ULTIMATE.start_main_~s1~0#1.base| (select (select |#memory_$Pointer$.base| |~#a~0.base|) |~#a~0.offset|)) (exists ((|v_#memory_$Pointer$.offset_60| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_60| |~#a~0.base| (store (select |v_#memory_$Pointer$.offset_60| |~#a~0.base|) (+ 12 |~#a~0.offset|) 0)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-12 01:01:04,032 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:01:04,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:01:04,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-12 01:01:04,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878351446] [2023-11-12 01:01:04,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:01:04,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 01:01:04,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:04,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 01:01:04,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=47, Unknown=0, NotChecked=0, Total=90 [2023-11-12 01:01:04,037 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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 01:01:04,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:04,145 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2023-11-12 01:01:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:01:04,146 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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 7 [2023-11-12 01:01:04,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:04,147 INFO L225 Difference]: With dead ends: 42 [2023-11-12 01:01:04,148 INFO L226 Difference]: Without dead ends: 35 [2023-11-12 01:01:04,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=47, Unknown=0, NotChecked=0, Total=90 [2023-11-12 01:01:04,150 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 49 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:04,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 24 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:01:04,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-12 01:01:04,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 13. [2023-11-12 01:01:04,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 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) [2023-11-12 01:01:04,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-11-12 01:01:04,156 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2023-11-12 01:01:04,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:04,157 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-11-12 01:01:04,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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 01:01:04,157 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-11-12 01:01:04,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 01:01:04,158 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:04,158 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:04,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:04,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:04,365 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:04,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:04,366 INFO L85 PathProgramCache]: Analyzing trace with hash -146512851, now seen corresponding path program 2 times [2023-11-12 01:01:04,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:04,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300706053] [2023-11-12 01:01:04,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:04,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:04,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:04,789 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:04,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:04,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300706053] [2023-11-12 01:01:04,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300706053] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:04,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225667187] [2023-11-12 01:01:04,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:01:04,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:04,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:04,797 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:04,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 01:01:05,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 01:01:05,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:01:05,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 01:01:05,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:05,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:01:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:05,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225667187] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:01:05,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1476003292] [2023-11-12 01:01:05,600 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 01:01:05,600 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:01:05,600 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:01:05,600 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:01:05,601 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:01:07,874 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:01:08,214 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '244#(and (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s1~0#1.base|) |ULTIMATE.start_main_~s1~0#1.offset|) 0) (exists ((|v_#memory_$Pointer$.base_85| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_85| |~#a~0.base| (store (select |v_#memory_$Pointer$.base_85| |~#a~0.base|) (+ 12 |~#a~0.offset|) (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)))) |#memory_$Pointer$.base|)) (= |ULTIMATE.start_main_~i~0#1| 0) (exists ((|v_#valid_56| (Array Int Int))) (and (= |#valid| (store |v_#valid_56| (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)) 1)) (= (select |v_#valid_56| (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|))) 0))) (or (not (= |ULTIMATE.start_main_~s1~0#1.offset| 0)) (not (= |ULTIMATE.start_main_~s1~0#1.base| 0))) (= |ULTIMATE.start_main_#t~mem11#1.offset| 0) (exists ((|v_#memory_$Pointer$.offset_85| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_85| |~#a~0.base| (store (select |v_#memory_$Pointer$.offset_85| |~#a~0.base|) (+ 12 |~#a~0.offset|) 0)))) (= |ULTIMATE.start_main_~s1~0#1.offset| (select (select |#memory_$Pointer$.offset| |~#a~0.base|) |~#a~0.offset|)) (= |ULTIMATE.start_main_#t~mem11#1.base| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s1~0#1.base|) |ULTIMATE.start_main_~s1~0#1.offset|) 0) (exists ((|v_#memory_int_80| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_80| |~#a~0.base| (store (select |v_#memory_int_80| |~#a~0.base|) (+ 12 |~#a~0.offset|) (select (select |#memory_int| |~#a~0.base|) (+ 12 |~#a~0.offset|)))))) (= (select (select |#memory_int| |ULTIMATE.start_main_~s1~0#1.base|) (+ |ULTIMATE.start_main_~s1~0#1.offset| 4)) 0) (not (= (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)) 0)) (<= (+ (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)) 1) |#StackHeapBarrier|) (= |ULTIMATE.start_main_~s1~0#1.base| (select (select |#memory_$Pointer$.base| |~#a~0.base|) |~#a~0.offset|)) (exists ((|v_#length_56| (Array Int Int))) (= |#length| (store |v_#length_56| (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)) 8))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-12 01:01:08,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:01:08,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:01:08,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-12 01:01:08,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099364322] [2023-11-12 01:01:08,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:01:08,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 01:01:08,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:08,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 01:01:08,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=122, Unknown=0, NotChecked=0, Total=240 [2023-11-12 01:01:08,218 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:08,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:08,718 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2023-11-12 01:01:08,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 01:01:08,719 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-12 01:01:08,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:08,721 INFO L225 Difference]: With dead ends: 90 [2023-11-12 01:01:08,721 INFO L226 Difference]: Without dead ends: 83 [2023-11-12 01:01:08,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=122, Unknown=0, NotChecked=0, Total=240 [2023-11-12 01:01:08,723 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 126 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:08,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 60 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 01:01:08,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-12 01:01:08,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 19. [2023-11-12 01:01:08,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 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 01:01:08,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-11-12 01:01:08,731 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 10 [2023-11-12 01:01:08,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:08,731 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-11-12 01:01:08,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:08,732 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-11-12 01:01:08,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-12 01:01:08,733 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:08,733 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:08,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:08,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:08,940 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:08,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:08,940 INFO L85 PathProgramCache]: Analyzing trace with hash -329048403, now seen corresponding path program 3 times [2023-11-12 01:01:08,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:08,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604299137] [2023-11-12 01:01:08,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:08,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:09,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:09,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604299137] [2023-11-12 01:01:09,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604299137] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:09,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450074089] [2023-11-12 01:01:09,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 01:01:09,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:09,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:09,705 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:09,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 01:01:10,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 01:01:10,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:01:10,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 01:01:10,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:10,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:01:10,294 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:10,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450074089] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:01:10,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1927900041] [2023-11-12 01:01:10,297 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 01:01:10,297 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:01:10,297 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:01:10,298 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:01:10,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:01:12,674 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:01:13,026 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '507#(and (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s1~0#1.base|) |ULTIMATE.start_main_~s1~0#1.offset|) 0) (exists ((|v_#memory_int_134| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_134| |~#a~0.base| (store (select |v_#memory_int_134| |~#a~0.base|) (+ 12 |~#a~0.offset|) (select (select |#memory_int| |~#a~0.base|) (+ 12 |~#a~0.offset|)))))) (exists ((|v_#length_90| (Array Int Int))) (= |#length| (store |v_#length_90| (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)) 8))) (= |ULTIMATE.start_main_~i~0#1| 0) (or (not (= |ULTIMATE.start_main_~s1~0#1.offset| 0)) (not (= |ULTIMATE.start_main_~s1~0#1.base| 0))) (= |ULTIMATE.start_main_#t~mem11#1.offset| 0) (= |ULTIMATE.start_main_~s1~0#1.offset| (select (select |#memory_$Pointer$.offset| |~#a~0.base|) |~#a~0.offset|)) (= |ULTIMATE.start_main_#t~mem11#1.base| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s1~0#1.base|) |ULTIMATE.start_main_~s1~0#1.offset|) 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~s1~0#1.base|) (+ |ULTIMATE.start_main_~s1~0#1.offset| 4)) 0) (not (= (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)) 0)) (<= (+ (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)) 1) |#StackHeapBarrier|) (= |ULTIMATE.start_main_~s1~0#1.base| (select (select |#memory_$Pointer$.base| |~#a~0.base|) |~#a~0.offset|)) (exists ((|v_#memory_$Pointer$.base_140| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_140| |~#a~0.base| (store (select |v_#memory_$Pointer$.base_140| |~#a~0.base|) (+ 12 |~#a~0.offset|) (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)))) |#memory_$Pointer$.base|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (exists ((|v_#memory_$Pointer$.offset_140| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_140| |~#a~0.base| (store (select |v_#memory_$Pointer$.offset_140| |~#a~0.base|) (+ 12 |~#a~0.offset|) 0)))) (exists ((|v_#valid_90| (Array Int Int))) (and (= |#valid| (store |v_#valid_90| (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)) 1)) (= (select |v_#valid_90| (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|))) 0))))' at error location [2023-11-12 01:01:13,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:01:13,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:01:13,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-12 01:01:13,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330734540] [2023-11-12 01:01:13,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:01:13,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 01:01:13,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:13,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 01:01:13,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=408, Unknown=0, NotChecked=0, Total=812 [2023-11-12 01:01:13,029 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:13,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:13,392 INFO L93 Difference]: Finished difference Result 186 states and 222 transitions. [2023-11-12 01:01:13,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 01:01:13,392 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-12 01:01:13,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:13,399 INFO L225 Difference]: With dead ends: 186 [2023-11-12 01:01:13,399 INFO L226 Difference]: Without dead ends: 179 [2023-11-12 01:01:13,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=404, Invalid=408, Unknown=0, NotChecked=0, Total=812 [2023-11-12 01:01:13,402 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 385 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:13,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 132 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 01:01:13,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-12 01:01:13,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 31. [2023-11-12 01:01:13,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:13,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2023-11-12 01:01:13,426 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 16 [2023-11-12 01:01:13,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:13,427 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2023-11-12 01:01:13,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:13,429 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2023-11-12 01:01:13,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-12 01:01:13,430 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:13,431 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:13,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:13,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:13,640 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:13,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:13,643 INFO L85 PathProgramCache]: Analyzing trace with hash 2038887341, now seen corresponding path program 4 times [2023-11-12 01:01:13,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:13,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226288205] [2023-11-12 01:01:13,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:13,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:15,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:15,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226288205] [2023-11-12 01:01:15,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226288205] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:15,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769848954] [2023-11-12 01:01:15,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 01:01:15,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:15,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:15,860 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:15,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 01:01:16,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:16,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 01:01:16,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:16,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:01:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:17,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769848954] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:01:17,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [15483753] [2023-11-12 01:01:17,467 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 01:01:17,467 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:01:17,468 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:01:17,468 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:01:17,468 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:01:19,146 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:01:19,455 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1009#(and (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s1~0#1.base|) |ULTIMATE.start_main_~s1~0#1.offset|) 0) (exists ((|v_#memory_$Pointer$.base_255| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_255| |~#a~0.base| (store (select |v_#memory_$Pointer$.base_255| |~#a~0.base|) (+ 12 |~#a~0.offset|) (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)))) |#memory_$Pointer$.base|)) (= |ULTIMATE.start_main_~i~0#1| 0) (exists ((|v_#length_160| (Array Int Int))) (= (store |v_#length_160| (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)) 8) |#length|)) (or (not (= |ULTIMATE.start_main_~s1~0#1.offset| 0)) (not (= |ULTIMATE.start_main_~s1~0#1.base| 0))) (= |ULTIMATE.start_main_#t~mem11#1.offset| 0) (= |ULTIMATE.start_main_~s1~0#1.offset| (select (select |#memory_$Pointer$.offset| |~#a~0.base|) |~#a~0.offset|)) (exists ((|v_#memory_$Pointer$.offset_255| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_255| |~#a~0.base| (store (select |v_#memory_$Pointer$.offset_255| |~#a~0.base|) (+ 12 |~#a~0.offset|) 0)))) (= |ULTIMATE.start_main_#t~mem11#1.base| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s1~0#1.base|) |ULTIMATE.start_main_~s1~0#1.offset|) 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~s1~0#1.base|) (+ |ULTIMATE.start_main_~s1~0#1.offset| 4)) 0) (not (= (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)) 0)) (<= (+ (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)) 1) |#StackHeapBarrier|) (= |ULTIMATE.start_main_~s1~0#1.base| (select (select |#memory_$Pointer$.base| |~#a~0.base|) |~#a~0.offset|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (exists ((|v_#valid_160| (Array Int Int))) (and (= (select |v_#valid_160| (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|))) 0) (= (store |v_#valid_160| (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)) 1) |#valid|))) (exists ((|v_#memory_int_248| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_248| |~#a~0.base| (store (select |v_#memory_int_248| |~#a~0.base|) (+ 12 |~#a~0.offset|) (select (select |#memory_int| |~#a~0.base|) (+ 12 |~#a~0.offset|)))))))' at error location [2023-11-12 01:01:19,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:01:19,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:01:19,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2023-11-12 01:01:19,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813015515] [2023-11-12 01:01:19,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:01:19,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-12 01:01:19,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:19,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-12 01:01:19,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1324, Invalid=1328, Unknown=0, NotChecked=0, Total=2652 [2023-11-12 01:01:19,460 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 47 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) [2023-11-12 01:01:20,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:20,569 INFO L93 Difference]: Finished difference Result 378 states and 450 transitions. [2023-11-12 01:01:20,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-12 01:01:20,570 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 47 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 28 [2023-11-12 01:01:20,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:20,573 INFO L225 Difference]: With dead ends: 378 [2023-11-12 01:01:20,573 INFO L226 Difference]: Without dead ends: 371 [2023-11-12 01:01:20,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1324, Invalid=1328, Unknown=0, NotChecked=0, Total=2652 [2023-11-12 01:01:20,576 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1162 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1162 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:20,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1162 Valid, 276 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 01:01:20,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2023-11-12 01:01:20,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 55. [2023-11-12 01:01:20,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:20,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2023-11-12 01:01:20,604 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 28 [2023-11-12 01:01:20,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:20,604 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2023-11-12 01:01:20,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 47 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) [2023-11-12 01:01:20,605 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2023-11-12 01:01:20,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-12 01:01:20,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:20,607 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:20,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:20,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:20,828 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:20,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:20,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1295508051, now seen corresponding path program 5 times [2023-11-12 01:01:20,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:20,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141629148] [2023-11-12 01:01:20,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:20,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:21,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:26,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:26,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141629148] [2023-11-12 01:01:26,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141629148] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:26,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773874442] [2023-11-12 01:01:26,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:01:26,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:26,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:26,892 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:26,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf3d330-429f-4c75-9fbd-74a87312fa82/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process