./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c --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_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/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_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/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_94a3831b-655f-472d-a011-191caa843014/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 2a46b64c20324a7544dfe7936b5f39eaa32bba659068797748195a7f292bdaee --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:10:06,319 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:10:06,438 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:10:06,445 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:10:06,446 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:10:06,498 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:10:06,499 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:10:06,499 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:10:06,500 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:10:06,505 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:10:06,506 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:10:06,507 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:10:06,507 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:10:06,509 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:10:06,510 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:10:06,510 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:10:06,510 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:10:06,511 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:10:06,511 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:10:06,512 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:10:06,512 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:10:06,514 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:10:06,515 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:10:06,516 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:10:06,516 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:10:06,516 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:10:06,517 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:10:06,529 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:10:06,530 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:10:06,530 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:10:06,531 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:10:06,532 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:10:06,532 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:10:06,532 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:10:06,532 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:10:06,533 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:10:06,533 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:10:06,534 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:10:06,534 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:10:06,534 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:10:06,534 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:10:06,535 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:10:06,535 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:10:06,535 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:10:06,536 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:10:06,536 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a46b64c20324a7544dfe7936b5f39eaa32bba659068797748195a7f292bdaee [2023-11-12 00:10:06,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:10:06,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:10:06,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:10:06,912 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:10:06,912 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:10:06,915 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2023-11-12 00:10:10,060 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:10:10,312 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:10:10,312 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2023-11-12 00:10:10,323 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/data/7ce26b2a8/75a170f86d5a4fd79acdb201ad53e4c0/FLAG12aaa09af [2023-11-12 00:10:10,340 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/data/7ce26b2a8/75a170f86d5a4fd79acdb201ad53e4c0 [2023-11-12 00:10:10,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:10:10,349 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:10:10,357 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:10:10,358 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:10:10,363 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:10:10,364 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:10:10" (1/1) ... [2023-11-12 00:10:10,365 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48599236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:10, skipping insertion in model container [2023-11-12 00:10:10,366 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:10:10" (1/1) ... [2023-11-12 00:10:10,395 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:10:10,562 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_94a3831b-655f-472d-a011-191caa843014/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c[416,429] [2023-11-12 00:10:10,586 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:10:10,597 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:10:10,614 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_94a3831b-655f-472d-a011-191caa843014/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c[416,429] [2023-11-12 00:10:10,629 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:10:10,663 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:10:10,663 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:10 WrapperNode [2023-11-12 00:10:10,664 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:10:10,665 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:10:10,665 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:10:10,665 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:10:10,673 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:10" (1/1) ... [2023-11-12 00:10:10,681 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:10" (1/1) ... [2023-11-12 00:10:10,705 INFO L138 Inliner]: procedures = 15, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2023-11-12 00:10:10,706 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:10:10,706 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:10:10,707 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:10:10,707 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:10:10,717 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:10" (1/1) ... [2023-11-12 00:10:10,717 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:10" (1/1) ... [2023-11-12 00:10:10,719 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:10" (1/1) ... [2023-11-12 00:10:10,720 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:10" (1/1) ... [2023-11-12 00:10:10,726 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:10" (1/1) ... [2023-11-12 00:10:10,730 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:10" (1/1) ... [2023-11-12 00:10:10,732 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:10" (1/1) ... [2023-11-12 00:10:10,733 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:10" (1/1) ... [2023-11-12 00:10:10,735 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:10:10,736 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:10:10,736 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:10:10,737 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:10:10,737 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:10" (1/1) ... [2023-11-12 00:10:10,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:10:10,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:10,782 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:10:10,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:10:10,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:10:10,827 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:10:10,827 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:10:10,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:10:10,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:10:10,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:10:10,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:10:10,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:10:10,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:10:10,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:10:10,932 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:10:10,934 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:10:11,260 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:10:11,307 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:10:11,307 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-12 00:10:11,310 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:10:11 BoogieIcfgContainer [2023-11-12 00:10:11,310 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:10:11,313 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:10:11,313 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:10:11,317 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:10:11,317 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:10:10" (1/3) ... [2023-11-12 00:10:11,318 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff7498e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:10:11, skipping insertion in model container [2023-11-12 00:10:11,318 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:10" (2/3) ... [2023-11-12 00:10:11,319 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff7498e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:10:11, skipping insertion in model container [2023-11-12 00:10:11,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:10:11" (3/3) ... [2023-11-12 00:10:11,320 INFO L112 eAbstractionObserver]: Analyzing ICFG copy-partial-2-n-u.c [2023-11-12 00:10:11,339 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:10:11,340 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:10:11,391 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:10:11,398 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;@48f070b2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:10:11,399 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:10:11,403 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:10:11,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 00:10:11,412 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:11,413 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:11,414 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:10:11,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:11,420 INFO L85 PathProgramCache]: Analyzing trace with hash -504600123, now seen corresponding path program 1 times [2023-11-12 00:10:11,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:11,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715819618] [2023-11-12 00:10:11,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:11,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:11,517 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:10:11,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815500411] [2023-11-12 00:10:11,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:11,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:11,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:11,522 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:11,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:10:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:11,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:10:11,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:10:11,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:10:11,717 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:10:11,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:11,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715819618] [2023-11-12 00:10:11,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:10:11,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815500411] [2023-11-12 00:10:11,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815500411] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:10:11,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:10:11,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:10:11,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750018554] [2023-11-12 00:10:11,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:10:11,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:10:11,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:11,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:10:11,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:10:11,760 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 00:10:11,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:11,847 INFO L93 Difference]: Finished difference Result 36 states and 54 transitions. [2023-11-12 00:10:11,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:10:11,850 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-11-12 00:10:11,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:11,857 INFO L225 Difference]: With dead ends: 36 [2023-11-12 00:10:11,858 INFO L226 Difference]: Without dead ends: 26 [2023-11-12 00:10:11,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:10:11,865 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:11,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:10:11,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-12 00:10:11,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 17. [2023-11-12 00:10:11,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:10:11,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2023-11-12 00:10:11,908 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 14 [2023-11-12 00:10:11,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:11,910 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2023-11-12 00:10:11,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 00:10:11,911 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2023-11-12 00:10:11,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-12 00:10:11,912 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:11,913 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:11,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:10:12,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 00:10:12,119 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:10:12,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:12,120 INFO L85 PathProgramCache]: Analyzing trace with hash 374620790, now seen corresponding path program 1 times [2023-11-12 00:10:12,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:12,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522632002] [2023-11-12 00:10:12,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:12,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:12,134 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:10:12,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461660343] [2023-11-12 00:10:12,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:12,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:12,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:12,136 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:12,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:10:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:12,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:10:12,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:10:12,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:10:12,262 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:10:12,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:12,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522632002] [2023-11-12 00:10:12,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:10:12,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461660343] [2023-11-12 00:10:12,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461660343] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:10:12,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:10:12,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:10:12,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988652875] [2023-11-12 00:10:12,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:10:12,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:10:12,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:12,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:10:12,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:10:12,268 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 00:10:12,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:12,329 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2023-11-12 00:10:12,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:10:12,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2023-11-12 00:10:12,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:12,331 INFO L225 Difference]: With dead ends: 36 [2023-11-12 00:10:12,331 INFO L226 Difference]: Without dead ends: 26 [2023-11-12 00:10:12,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:10:12,334 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:12,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 18 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:10:12,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-12 00:10:12,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2023-11-12 00:10:12,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:10:12,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2023-11-12 00:10:12,344 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 16 [2023-11-12 00:10:12,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:12,344 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2023-11-12 00:10:12,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 00:10:12,345 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2023-11-12 00:10:12,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-12 00:10:12,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:12,346 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:12,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:10:12,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:12,553 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:10:12,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:12,554 INFO L85 PathProgramCache]: Analyzing trace with hash 662426069, now seen corresponding path program 1 times [2023-11-12 00:10:12,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:12,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550151912] [2023-11-12 00:10:12,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:12,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:12,569 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:10:12,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [742150328] [2023-11-12 00:10:12,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:12,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:12,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:12,571 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:12,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:10:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:12,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:10:12,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:10:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:10:12,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:10:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:10:12,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:12,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550151912] [2023-11-12 00:10:12,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:10:12,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742150328] [2023-11-12 00:10:12,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742150328] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:10:12,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [782021836] [2023-11-12 00:10:12,853 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-12 00:10:12,853 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:10:12,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:10:12,864 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:10:12,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:10:14,333 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 79 for LOIs [2023-11-12 00:10:14,394 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:10:15,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [782021836] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:10:15,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:10:15,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 5] total 14 [2023-11-12 00:10:15,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734531119] [2023-11-12 00:10:15,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:10:15,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:10:15,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:15,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:10:15,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-11-12 00:10:15,274 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 00:10:15,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:15,884 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2023-11-12 00:10:15,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:10:15,885 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-11-12 00:10:15,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:15,886 INFO L225 Difference]: With dead ends: 35 [2023-11-12 00:10:15,886 INFO L226 Difference]: Without dead ends: 27 [2023-11-12 00:10:15,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:10:15,888 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 34 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:15,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 13 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:10:15,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-12 00:10:15,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2023-11-12 00:10:15,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:10:15,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2023-11-12 00:10:15,908 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 17 [2023-11-12 00:10:15,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:15,909 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2023-11-12 00:10:15,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 00:10:15,910 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2023-11-12 00:10:15,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 00:10:15,911 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:15,911 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:15,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:10:16,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:16,117 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:10:16,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:16,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1262512447, now seen corresponding path program 1 times [2023-11-12 00:10:16,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:16,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868378123] [2023-11-12 00:10:16,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:16,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:16,130 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:10:16,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889725930] [2023-11-12 00:10:16,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:16,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:16,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:16,132 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:16,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:10:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:16,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:10:16,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:10:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:10:16,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:10:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:10:16,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:16,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868378123] [2023-11-12 00:10:16,277 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:10:16,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889725930] [2023-11-12 00:10:16,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889725930] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:10:16,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1708965229] [2023-11-12 00:10:16,281 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:10:16,281 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:10:16,282 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:10:16,282 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:10:16,282 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:10:17,479 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 79 for LOIs [2023-11-12 00:10:17,516 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:10:18,759 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '610#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (exists ((|v_ULTIMATE.start_main_~j~0#1_88| Int) (|v_ULTIMATE.start_main_~i~0#1_75| Int)) (and (<= |ULTIMATE.start_main_~s~0#1| |v_ULTIMATE.start_main_~j~0#1_88|) (<= |ULTIMATE.start_main_~q~0#1| |v_ULTIMATE.start_main_~i~0#1_75|))) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-12 00:10:18,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:10:18,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:10:18,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-12 00:10:18,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026093404] [2023-11-12 00:10:18,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:10:18,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:10:18,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:18,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:10:18,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-11-12 00:10:18,762 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 00:10:18,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:18,962 INFO L93 Difference]: Finished difference Result 72 states and 98 transitions. [2023-11-12 00:10:18,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:10:18,962 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2023-11-12 00:10:18,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:18,966 INFO L225 Difference]: With dead ends: 72 [2023-11-12 00:10:18,967 INFO L226 Difference]: Without dead ends: 57 [2023-11-12 00:10:18,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2023-11-12 00:10:18,972 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 144 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:18,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 29 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:10:18,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-12 00:10:19,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 25. [2023-11-12 00:10:19,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:10:19,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2023-11-12 00:10:19,016 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 20 [2023-11-12 00:10:19,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:19,020 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2023-11-12 00:10:19,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 00:10:19,020 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2023-11-12 00:10:19,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-12 00:10:19,021 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:19,021 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:19,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-12 00:10:19,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:19,227 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:10:19,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:19,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1987518784, now seen corresponding path program 2 times [2023-11-12 00:10:19,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:19,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882663041] [2023-11-12 00:10:19,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:19,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:19,243 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:10:19,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1495748251] [2023-11-12 00:10:19,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:10:19,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:19,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:19,246 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:19,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:10:19,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 00:10:19,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:10:19,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:10:19,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:10:19,383 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 00:10:19,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:10:19,425 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 00:10:19,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:19,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882663041] [2023-11-12 00:10:19,427 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:10:19,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495748251] [2023-11-12 00:10:19,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495748251] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:10:19,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1057377126] [2023-11-12 00:10:19,436 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:10:19,437 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:10:19,437 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:10:19,437 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:10:19,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:10:20,364 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 79 for LOIs [2023-11-12 00:10:20,398 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:10:21,536 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '925#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_90| Int) (|v_ULTIMATE.start_main_~j~0#1_121| Int)) (and (<= |ULTIMATE.start_main_~s~0#1| |v_ULTIMATE.start_main_~j~0#1_121|) (<= |ULTIMATE.start_main_~q~0#1| |v_ULTIMATE.start_main_~i~0#1_90|))) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-12 00:10:21,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:10:21,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:10:21,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-12 00:10:21,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203922413] [2023-11-12 00:10:21,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:10:21,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:10:21,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:21,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:10:21,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-11-12 00:10:21,538 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 00:10:21,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:21,749 INFO L93 Difference]: Finished difference Result 80 states and 103 transitions. [2023-11-12 00:10:21,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:10:21,750 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 23 [2023-11-12 00:10:21,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:21,755 INFO L225 Difference]: With dead ends: 80 [2023-11-12 00:10:21,755 INFO L226 Difference]: Without dead ends: 72 [2023-11-12 00:10:21,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-11-12 00:10:21,757 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 92 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:21,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 27 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:10:21,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-12 00:10:21,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 31. [2023-11-12 00:10:21,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:10:21,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2023-11-12 00:10:21,799 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 23 [2023-11-12 00:10:21,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:21,800 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2023-11-12 00:10:21,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 00:10:21,801 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2023-11-12 00:10:21,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-12 00:10:21,803 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:21,803 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:21,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:10:22,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:22,009 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:10:22,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:22,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1904293799, now seen corresponding path program 3 times [2023-11-12 00:10:22,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:22,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457597820] [2023-11-12 00:10:22,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:22,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:22,025 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:10:22,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1706017724] [2023-11-12 00:10:22,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:10:22,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:22,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:22,027 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:22,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:10:22,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:10:22,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:10:22,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:10:22,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:10:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-12 00:10:22,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:10:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-12 00:10:22,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:22,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457597820] [2023-11-12 00:10:22,161 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:10:22,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706017724] [2023-11-12 00:10:22,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706017724] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:10:22,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1285014135] [2023-11-12 00:10:22,165 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:10:22,165 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:10:22,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:10:22,166 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:10:22,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:10:23,002 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 79 for LOIs [2023-11-12 00:10:23,029 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:10:23,818 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1306#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (exists ((|v_ULTIMATE.start_main_~i~0#1_104| Int) (|v_ULTIMATE.start_main_~j~0#1_151| Int)) (and (<= |ULTIMATE.start_main_~q~0#1| |v_ULTIMATE.start_main_~i~0#1_104|) (<= |ULTIMATE.start_main_~s~0#1| |v_ULTIMATE.start_main_~j~0#1_151|))) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-12 00:10:23,819 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:10:23,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:10:23,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2023-11-12 00:10:23,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833447119] [2023-11-12 00:10:23,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:10:23,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:10:23,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:23,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:10:23,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-12 00:10:23,821 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 00:10:23,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:23,958 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2023-11-12 00:10:23,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:10:23,959 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-11-12 00:10:23,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:23,960 INFO L225 Difference]: With dead ends: 52 [2023-11-12 00:10:23,960 INFO L226 Difference]: Without dead ends: 39 [2023-11-12 00:10:23,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 66 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:10:23,961 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:23,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 22 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:10:23,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-12 00:10:23,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2023-11-12 00:10:23,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:10:23,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2023-11-12 00:10:23,996 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 29 [2023-11-12 00:10:23,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:23,996 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2023-11-12 00:10:23,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 00:10:23,999 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2023-11-12 00:10:23,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-12 00:10:24,000 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:24,001 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:24,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:10:24,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:24,207 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:10:24,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:24,207 INFO L85 PathProgramCache]: Analyzing trace with hash 2081114550, now seen corresponding path program 4 times [2023-11-12 00:10:24,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:24,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526875437] [2023-11-12 00:10:24,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:24,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:24,233 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:10:24,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167637060] [2023-11-12 00:10:24,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:10:24,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:24,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:24,235 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:24,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:10:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:24,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:10:24,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:10:24,395 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-12 00:10:24,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:10:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-12 00:10:24,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:24,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526875437] [2023-11-12 00:10:24,479 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:10:24,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167637060] [2023-11-12 00:10:24,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167637060] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:10:24,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [709472475] [2023-11-12 00:10:24,482 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:10:24,483 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:10:24,483 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:10:24,484 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:10:24,484 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:10:25,377 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 79 for LOIs [2023-11-12 00:10:25,407 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:10:26,349 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1670#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_121| Int) (|v_ULTIMATE.start_main_~j~0#1_194| Int)) (and (<= |ULTIMATE.start_main_~s~0#1| |v_ULTIMATE.start_main_~j~0#1_194|) (<= |ULTIMATE.start_main_~q~0#1| |v_ULTIMATE.start_main_~i~0#1_121|))) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-12 00:10:26,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:10:26,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:10:26,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-12 00:10:26,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456713306] [2023-11-12 00:10:26,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:10:26,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 00:10:26,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:26,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 00:10:26,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2023-11-12 00:10:26,352 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 00:10:26,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:26,890 INFO L93 Difference]: Finished difference Result 196 states and 273 transitions. [2023-11-12 00:10:26,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 00:10:26,892 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-11-12 00:10:26,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:26,894 INFO L225 Difference]: With dead ends: 196 [2023-11-12 00:10:26,894 INFO L226 Difference]: Without dead ends: 170 [2023-11-12 00:10:26,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2023-11-12 00:10:26,896 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 264 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:26,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 45 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:10:26,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-12 00:10:26,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 39. [2023-11-12 00:10:26,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:10:26,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2023-11-12 00:10:26,935 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 32 [2023-11-12 00:10:26,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:26,936 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2023-11-12 00:10:26,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 00:10:26,936 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2023-11-12 00:10:26,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-12 00:10:26,937 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:26,937 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:26,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:10:27,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:27,144 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:10:27,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:27,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1536255318, now seen corresponding path program 5 times [2023-11-12 00:10:27,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:27,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358704369] [2023-11-12 00:10:27,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:27,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:27,184 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:10:27,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312964691] [2023-11-12 00:10:27,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:10:27,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:27,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:27,186 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:27,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:10:27,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 00:10:27,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:10:27,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:10:27,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:10:27,350 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-12 00:10:27,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:10:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-12 00:10:27,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:27,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358704369] [2023-11-12 00:10:27,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:10:27,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312964691] [2023-11-12 00:10:27,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312964691] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:10:27,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [410530914] [2023-11-12 00:10:27,416 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:10:27,416 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:10:27,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:10:27,417 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:10:27,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:10:28,275 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 79 for LOIs [2023-11-12 00:10:28,299 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:10:29,313 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2331#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (exists ((|v_ULTIMATE.start_main_~j~0#1_242| Int) (|v_ULTIMATE.start_main_~i~0#1_140| Int)) (and (<= |ULTIMATE.start_main_~s~0#1| |v_ULTIMATE.start_main_~j~0#1_242|) (<= |ULTIMATE.start_main_~q~0#1| |v_ULTIMATE.start_main_~i~0#1_140|))) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-12 00:10:29,314 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:10:29,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:10:29,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-12 00:10:29,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850613879] [2023-11-12 00:10:29,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:10:29,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:10:29,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:29,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:10:29,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-11-12 00:10:29,322 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 00:10:29,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:29,535 INFO L93 Difference]: Finished difference Result 125 states and 151 transitions. [2023-11-12 00:10:29,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:10:29,536 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2023-11-12 00:10:29,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:29,537 INFO L225 Difference]: With dead ends: 125 [2023-11-12 00:10:29,537 INFO L226 Difference]: Without dead ends: 105 [2023-11-12 00:10:29,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2023-11-12 00:10:29,539 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 154 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:29,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 31 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:10:29,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-12 00:10:29,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 75. [2023-11-12 00:10:29,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 71 states have internal predecessors, (83), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:10:29,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2023-11-12 00:10:29,607 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 38 [2023-11-12 00:10:29,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:29,608 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2023-11-12 00:10:29,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 00:10:29,608 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2023-11-12 00:10:29,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-12 00:10:29,609 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:29,610 INFO L195 NwaCegarLoop]: trace histogram [40, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:29,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-12 00:10:29,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:29,812 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:10:29,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:29,813 INFO L85 PathProgramCache]: Analyzing trace with hash 162075657, now seen corresponding path program 6 times [2023-11-12 00:10:29,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:29,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719214165] [2023-11-12 00:10:29,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:29,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:29,852 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:10:29,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [726403218] [2023-11-12 00:10:29,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:10:29,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:29,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:29,854 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:29,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 00:10:29,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:10:29,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:10:29,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 00:10:29,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:10:30,300 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 34 proven. 737 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-11-12 00:10:30,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:10:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 34 proven. 737 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-11-12 00:10:30,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:30,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719214165] [2023-11-12 00:10:30,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:10:30,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726403218] [2023-11-12 00:10:30,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726403218] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:10:30,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1411059926] [2023-11-12 00:10:30,702 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:10:30,702 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:10:30,702 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:10:30,702 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:10:30,703 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:10:32,134 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 79 for LOIs [2023-11-12 00:10:32,164 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:10:33,889 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3173#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (exists ((|v_ULTIMATE.start_main_~i~0#1_168| Int) (|v_ULTIMATE.start_main_~j~0#1_322| Int)) (and (<= |ULTIMATE.start_main_~q~0#1| |v_ULTIMATE.start_main_~i~0#1_168|) (<= |ULTIMATE.start_main_~s~0#1| |v_ULTIMATE.start_main_~j~0#1_322|))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-12 00:10:33,889 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:10:33,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:10:33,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2023-11-12 00:10:33,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314612576] [2023-11-12 00:10:33,890 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:10:33,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-12 00:10:33,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:33,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-12 00:10:33,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2023-11-12 00:10:33,893 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-12 00:10:34,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:34,400 INFO L93 Difference]: Finished difference Result 159 states and 188 transitions. [2023-11-12 00:10:34,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 00:10:34,401 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 74 [2023-11-12 00:10:34,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:34,403 INFO L225 Difference]: With dead ends: 159 [2023-11-12 00:10:34,403 INFO L226 Difference]: Without dead ends: 139 [2023-11-12 00:10:34,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 186 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2023-11-12 00:10:34,405 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 147 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:34,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 72 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:10:34,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-11-12 00:10:34,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 87. [2023-11-12 00:10:34,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.1566265060240963) internal successors, (96), 83 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:10:34,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2023-11-12 00:10:34,480 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 74 [2023-11-12 00:10:34,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:34,480 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2023-11-12 00:10:34,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-12 00:10:34,481 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2023-11-12 00:10:34,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-12 00:10:34,483 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:34,483 INFO L195 NwaCegarLoop]: trace histogram [50, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:34,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 00:10:34,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:34,688 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:10:34,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:34,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1862958950, now seen corresponding path program 7 times [2023-11-12 00:10:34,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:34,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516874118] [2023-11-12 00:10:34,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:34,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:34,722 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:10:34,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909102253] [2023-11-12 00:10:34,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:10:34,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:34,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:34,724 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:34,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 00:10:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:34,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 00:10:34,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:10:35,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 489 proven. 55 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2023-11-12 00:10:35,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:10:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 489 proven. 55 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2023-11-12 00:10:35,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:35,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516874118] [2023-11-12 00:10:35,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:10:35,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909102253] [2023-11-12 00:10:35,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909102253] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:10:35,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1767574810] [2023-11-12 00:10:35,322 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:10:35,322 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:10:35,323 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:10:35,323 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:10:35,323 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:10:36,090 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 79 for LOIs [2023-11-12 00:10:36,114 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:10:37,178 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4187#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (exists ((|v_ULTIMATE.start_main_~j~0#1_424| Int) (|v_ULTIMATE.start_main_~i~0#1_190| Int)) (and (<= |ULTIMATE.start_main_~s~0#1| |v_ULTIMATE.start_main_~j~0#1_424|) (<= |ULTIMATE.start_main_~q~0#1| |v_ULTIMATE.start_main_~i~0#1_190|))) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-12 00:10:37,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:10:37,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:10:37,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-11-12 00:10:37,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609023942] [2023-11-12 00:10:37,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:10:37,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-12 00:10:37,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:37,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-12 00:10:37,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=986, Unknown=0, NotChecked=0, Total=1332 [2023-11-12 00:10:37,181 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 00:10:38,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:38,388 INFO L93 Difference]: Finished difference Result 515 states and 725 transitions. [2023-11-12 00:10:38,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-12 00:10:38,389 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 86 [2023-11-12 00:10:38,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:38,393 INFO L225 Difference]: With dead ends: 515 [2023-11-12 00:10:38,393 INFO L226 Difference]: Without dead ends: 446 [2023-11-12 00:10:38,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 219 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=632, Invalid=1624, Unknown=0, NotChecked=0, Total=2256 [2023-11-12 00:10:38,396 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 550 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:38,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 87 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:10:38,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2023-11-12 00:10:38,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 147. [2023-11-12 00:10:38,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 143 states have (on average 1.0909090909090908) internal successors, (156), 143 states have internal predecessors, (156), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:10:38,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 160 transitions. [2023-11-12 00:10:38,504 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 160 transitions. Word has length 86 [2023-11-12 00:10:38,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:38,504 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 160 transitions. [2023-11-12 00:10:38,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 00:10:38,505 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 160 transitions. [2023-11-12 00:10:38,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-12 00:10:38,507 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:38,507 INFO L195 NwaCegarLoop]: trace histogram [110, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:38,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 00:10:38,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 00:10:38,712 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:10:38,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:38,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1436130778, now seen corresponding path program 8 times [2023-11-12 00:10:38,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:38,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765691321] [2023-11-12 00:10:38,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:38,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:38,788 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:10:38,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87601440] [2023-11-12 00:10:38,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:10:38,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:38,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:38,789 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:38,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 00:10:39,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-12 00:10:39,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:10:39,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:10:39,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:10:39,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6610 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 6593 trivial. 0 not checked. [2023-11-12 00:10:39,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:10:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6610 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6593 trivial. 0 not checked. [2023-11-12 00:10:39,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:39,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765691321] [2023-11-12 00:10:39,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:10:39,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87601440] [2023-11-12 00:10:39,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87601440] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:10:39,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1033298111] [2023-11-12 00:10:39,422 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:10:39,422 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:10:39,422 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:10:39,422 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:10:39,423 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:10:40,030 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 79 for LOIs [2023-11-12 00:10:40,063 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:10:41,177 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6316#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (exists ((|v_ULTIMATE.start_main_~i~0#1_212| Int) (|v_ULTIMATE.start_main_~j~0#1_576| Int)) (and (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 500 |v_ULTIMATE.start_main_~i~0#1_212|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 700 |v_ULTIMATE.start_main_~j~0#1_576|) (= |ULTIMATE.start_main_~n~0#1| 1500))) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-12 00:10:41,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:10:41,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:10:41,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-12 00:10:41,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14286468] [2023-11-12 00:10:41,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:10:41,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:10:41,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:41,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:10:41,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-11-12 00:10:41,179 INFO L87 Difference]: Start difference. First operand 147 states and 160 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 00:10:41,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:41,462 INFO L93 Difference]: Finished difference Result 192 states and 225 transitions. [2023-11-12 00:10:41,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:10:41,462 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 146 [2023-11-12 00:10:41,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:41,464 INFO L225 Difference]: With dead ends: 192 [2023-11-12 00:10:41,464 INFO L226 Difference]: Without dead ends: 175 [2023-11-12 00:10:41,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 417 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2023-11-12 00:10:41,466 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:41,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 30 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:10:41,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-12 00:10:41,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 168. [2023-11-12 00:10:41,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 164 states have (on average 1.0975609756097562) internal successors, (180), 164 states have internal predecessors, (180), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:10:41,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 184 transitions. [2023-11-12 00:10:41,598 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 184 transitions. Word has length 146 [2023-11-12 00:10:41,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:41,598 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 184 transitions. [2023-11-12 00:10:41,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 00:10:41,599 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 184 transitions. [2023-11-12 00:10:41,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-12 00:10:41,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:41,601 INFO L195 NwaCegarLoop]: trace histogram [110, 16, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:41,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 00:10:41,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 00:10:41,803 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:10:41,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:41,803 INFO L85 PathProgramCache]: Analyzing trace with hash 163083022, now seen corresponding path program 9 times [2023-11-12 00:10:41,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:41,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206285680] [2023-11-12 00:10:41,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:41,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:41,868 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:10:41,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441705912] [2023-11-12 00:10:41,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:10:41,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:41,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:41,870 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:41,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 00:10:43,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:10:43,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:10:43,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 1252 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:10:43,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:10:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6772 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 6683 trivial. 0 not checked. [2023-11-12 00:10:44,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:10:44,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6772 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 6683 trivial. 0 not checked. [2023-11-12 00:10:44,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:44,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206285680] [2023-11-12 00:10:44,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:10:44,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441705912] [2023-11-12 00:10:44,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441705912] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:10:44,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [173480542] [2023-11-12 00:10:44,353 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:10:44,353 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:10:44,353 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:10:44,353 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:10:44,353 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:10:44,887 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 79 for LOIs [2023-11-12 00:10:44,906 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:10:45,964 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7970#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (= |ULTIMATE.start_main_~j~0#1| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_234| Int) (|v_ULTIMATE.start_main_~j~0#1_743| Int)) (and (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 500 |v_ULTIMATE.start_main_~i~0#1_234|) (= |ULTIMATE.start_main_~s~0#1| 700) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| 1500) (<= 700 |v_ULTIMATE.start_main_~j~0#1_743|))))' at error location [2023-11-12 00:10:45,964 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:10:45,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:10:45,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-12 00:10:45,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966516854] [2023-11-12 00:10:45,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:10:45,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 00:10:45,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:45,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 00:10:45,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2023-11-12 00:10:45,966 INFO L87 Difference]: Start difference. First operand 168 states and 184 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 00:10:46,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:46,348 INFO L93 Difference]: Finished difference Result 264 states and 315 transitions. [2023-11-12 00:10:46,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 00:10:46,350 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 158 [2023-11-12 00:10:46,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:46,352 INFO L225 Difference]: With dead ends: 264 [2023-11-12 00:10:46,352 INFO L226 Difference]: Without dead ends: 229 [2023-11-12 00:10:46,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 447 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2023-11-12 00:10:46,353 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 144 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:46,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 48 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:10:46,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2023-11-12 00:10:46,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 210. [2023-11-12 00:10:46,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 206 states have (on average 1.1067961165048543) internal successors, (228), 206 states have internal predecessors, (228), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:10:46,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 232 transitions. [2023-11-12 00:10:46,546 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 232 transitions. Word has length 158 [2023-11-12 00:10:46,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:46,547 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 232 transitions. [2023-11-12 00:10:46,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 00:10:46,547 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 232 transitions. [2023-11-12 00:10:46,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-11-12 00:10:46,549 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:46,549 INFO L195 NwaCegarLoop]: trace histogram [110, 40, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:46,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 00:10:46,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 00:10:46,761 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:10:46,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:46,762 INFO L85 PathProgramCache]: Analyzing trace with hash 927240206, now seen corresponding path program 10 times [2023-11-12 00:10:46,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:46,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870761156] [2023-11-12 00:10:46,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:46,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:46,841 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:10:46,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1263539673] [2023-11-12 00:10:46,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:10:46,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:46,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:46,843 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:46,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 00:10:47,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:47,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 1420 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-12 00:10:47,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:10:47,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7528 backedges. 2121 proven. 253 refuted. 0 times theorem prover too weak. 5154 trivial. 0 not checked. [2023-11-12 00:10:47,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:10:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7528 backedges. 2121 proven. 253 refuted. 0 times theorem prover too weak. 5154 trivial. 0 not checked. [2023-11-12 00:10:48,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:48,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870761156] [2023-11-12 00:10:48,486 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:10:48,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263539673] [2023-11-12 00:10:48,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263539673] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:10:48,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1354066755] [2023-11-12 00:10:48,492 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:10:48,492 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:10:48,493 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:10:48,493 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:10:48,493 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:10:49,335 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 79 for LOIs [2023-11-12 00:10:49,369 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:10:50,598 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9996#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (exists ((|v_ULTIMATE.start_main_~i~0#1_256| Int) (|v_ULTIMATE.start_main_~j~0#1_952| Int)) (and (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 700 |v_ULTIMATE.start_main_~j~0#1_952|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 500 |v_ULTIMATE.start_main_~i~0#1_256|) (= |ULTIMATE.start_main_~s~0#1| 700) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| 1500))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-12 00:10:50,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:10:50,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:10:50,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2023-11-12 00:10:50,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027430824] [2023-11-12 00:10:50,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:10:50,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-12 00:10:50,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:50,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-12 00:10:50,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1365, Invalid=2175, Unknown=0, NotChecked=0, Total=3540 [2023-11-12 00:10:50,603 INFO L87 Difference]: Start difference. First operand 210 states and 232 transitions. Second operand has 50 states, 50 states have (on average 1.3) internal successors, (65), 50 states have internal predecessors, (65), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 00:10:54,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:54,147 INFO L93 Difference]: Finished difference Result 1037 states and 1406 transitions. [2023-11-12 00:10:54,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-12 00:10:54,148 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.3) internal successors, (65), 50 states have internal predecessors, (65), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 182 [2023-11-12 00:10:54,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:54,153 INFO L225 Difference]: With dead ends: 1037 [2023-11-12 00:10:54,154 INFO L226 Difference]: Without dead ends: 857 [2023-11-12 00:10:54,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 483 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2584, Invalid=4222, Unknown=0, NotChecked=0, Total=6806 [2023-11-12 00:10:54,162 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1186 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 840 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1186 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 840 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:54,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1186 Valid, 159 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [840 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 00:10:54,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2023-11-12 00:10:54,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 330. [2023-11-12 00:10:54,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 326 states have (on average 1.0674846625766872) internal successors, (348), 326 states have internal predecessors, (348), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:10:54,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 352 transitions. [2023-11-12 00:10:54,444 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 352 transitions. Word has length 182 [2023-11-12 00:10:54,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:54,444 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 352 transitions. [2023-11-12 00:10:54,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.3) internal successors, (65), 50 states have internal predecessors, (65), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 00:10:54,445 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 352 transitions. [2023-11-12 00:10:54,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-11-12 00:10:54,450 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:54,450 INFO L195 NwaCegarLoop]: trace histogram [230, 40, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:54,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 00:10:54,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:54,659 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:10:54,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:54,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1947309426, now seen corresponding path program 11 times [2023-11-12 00:10:54,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:54,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365519817] [2023-11-12 00:10:54,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:54,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:54,812 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:10:54,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431971922] [2023-11-12 00:10:54,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:10:54,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:54,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:54,823 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:54,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a3831b-655f-472d-a011-191caa843014/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process