./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire --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 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:13:41,707 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:13:41,794 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:13:41,799 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:13:41,800 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:13:41,830 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:13:41,830 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:13:41,831 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:13:41,832 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:13:41,833 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:13:41,833 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:13:41,834 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:13:41,835 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:13:41,835 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:13:41,836 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:13:41,836 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:13:41,837 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:13:41,838 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:13:41,838 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:13:41,839 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:13:41,839 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:13:41,852 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:13:41,853 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:13:41,854 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:13:41,854 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:13:41,855 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:13:41,855 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:13:41,856 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:13:41,856 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:13:41,857 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:13:41,857 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:13:41,858 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:13:41,858 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:13:41,859 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:13:41,859 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:13:41,859 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:13:41,860 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:13:41,860 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:13:41,860 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:13:41,861 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:13:41,861 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:13:41,862 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:13:41,862 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:13:41,862 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:13:41,862 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:13:41,863 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:13:41,863 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:13:41,863 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_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2023-11-23 21:13:42,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:13:42,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:13:42,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:13:42,253 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:13:42,253 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:13:42,255 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2023-11-23 21:13:45,659 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:13:45,930 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:13:45,934 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2023-11-23 21:13:45,950 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/data/e9d7e8702/beebf960ce4847eba21dc4f0ef960534/FLAGaa5ab14e9 [2023-11-23 21:13:45,968 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/data/e9d7e8702/beebf960ce4847eba21dc4f0ef960534 [2023-11-23 21:13:45,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:13:45,981 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:13:45,983 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:13:45,983 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:13:45,989 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:13:45,990 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:13:45" (1/1) ... [2023-11-23 21:13:45,991 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79e74a0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:45, skipping insertion in model container [2023-11-23 21:13:45,991 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:13:45" (1/1) ... [2023-11-23 21:13:46,051 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:13:46,268 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_ce611e5b-3672-4db5-babe-5248a6499169/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2023-11-23 21:13:46,335 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:13:46,347 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:13:46,360 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_ce611e5b-3672-4db5-babe-5248a6499169/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2023-11-23 21:13:46,407 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:13:46,431 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:13:46,432 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:46 WrapperNode [2023-11-23 21:13:46,432 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:13:46,434 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:13:46,434 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:13:46,434 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:13:46,444 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:46" (1/1) ... [2023-11-23 21:13:46,455 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:46" (1/1) ... [2023-11-23 21:13:46,487 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 146 [2023-11-23 21:13:46,487 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:13:46,489 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:13:46,489 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:13:46,489 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:13:46,500 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:46" (1/1) ... [2023-11-23 21:13:46,501 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:46" (1/1) ... [2023-11-23 21:13:46,504 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:46" (1/1) ... [2023-11-23 21:13:46,505 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:46" (1/1) ... [2023-11-23 21:13:46,512 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:46" (1/1) ... [2023-11-23 21:13:46,518 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:46" (1/1) ... [2023-11-23 21:13:46,520 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:46" (1/1) ... [2023-11-23 21:13:46,522 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:46" (1/1) ... [2023-11-23 21:13:46,526 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:13:46,527 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:13:46,527 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:13:46,527 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:13:46,529 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:46" (1/1) ... [2023-11-23 21:13:46,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:13:46,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:46,568 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:13:46,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:13:46,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:13:46,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:13:46,630 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-11-23 21:13:46,631 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-11-23 21:13:46,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:13:46,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:13:46,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 21:13:46,634 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 21:13:46,716 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:13:46,718 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:13:47,196 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:13:47,494 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:13:47,495 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 21:13:47,512 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:13:47 BoogieIcfgContainer [2023-11-23 21:13:47,512 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:13:47,520 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:13:47,520 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:13:47,524 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:13:47,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:13:45" (1/3) ... [2023-11-23 21:13:47,527 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27cb13e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:13:47, skipping insertion in model container [2023-11-23 21:13:47,527 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:46" (2/3) ... [2023-11-23 21:13:47,529 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27cb13e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:13:47, skipping insertion in model container [2023-11-23 21:13:47,530 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:13:47" (3/3) ... [2023-11-23 21:13:47,532 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2023-11-23 21:13:47,596 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:13:47,598 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:13:47,676 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:13:47,685 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;@7543d83d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:13:47,686 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:13:47,691 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 32 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 21:13:47,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 21:13:47,702 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:47,703 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:47,704 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:47,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:47,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1647763528, now seen corresponding path program 1 times [2023-11-23 21:13:47,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:47,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415679031] [2023-11-23 21:13:47,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:47,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:47,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:13:48,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:48,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415679031] [2023-11-23 21:13:48,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415679031] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:13:48,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990755940] [2023-11-23 21:13:48,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:48,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:48,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:48,179 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:13:48,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:13:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:48,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:13:48,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:13:48,403 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:13:48,403 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:13:48,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990755940] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:48,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:13:48,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-23 21:13:48,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065848761] [2023-11-23 21:13:48,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:48,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:13:48,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:48,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:13:48,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:13:48,472 INFO L87 Difference]: Start difference. First operand has 39 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 32 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:13:48,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:48,631 INFO L93 Difference]: Finished difference Result 88 states and 138 transitions. [2023-11-23 21:13:48,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:13:48,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-11-23 21:13:48,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:48,645 INFO L225 Difference]: With dead ends: 88 [2023-11-23 21:13:48,645 INFO L226 Difference]: Without dead ends: 47 [2023-11-23 21:13:48,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:13:48,653 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 14 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:48,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 86 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:13:48,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-23 21:13:48,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2023-11-23 21:13:48,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-23 21:13:48,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2023-11-23 21:13:48,702 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 32 [2023-11-23 21:13:48,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:48,702 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 54 transitions. [2023-11-23 21:13:48,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:13:48,703 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 54 transitions. [2023-11-23 21:13:48,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 21:13:48,705 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:48,705 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:48,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:13:48,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:48,933 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:48,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:48,934 INFO L85 PathProgramCache]: Analyzing trace with hash 254907196, now seen corresponding path program 1 times [2023-11-23 21:13:48,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:48,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990753099] [2023-11-23 21:13:48,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:48,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:49,096 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:13:49,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:49,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990753099] [2023-11-23 21:13:49,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990753099] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:13:49,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432174260] [2023-11-23 21:13:49,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:49,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:49,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:49,099 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:13:49,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:13:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:49,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:13:49,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:13:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:13:49,273 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:13:49,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432174260] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:49,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:13:49,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-23 21:13:49,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920399606] [2023-11-23 21:13:49,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:49,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:13:49,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:49,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:13:49,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:13:49,278 INFO L87 Difference]: Start difference. First operand 39 states and 54 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:13:49,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:49,391 INFO L93 Difference]: Finished difference Result 79 states and 112 transitions. [2023-11-23 21:13:49,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:13:49,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-11-23 21:13:49,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:49,394 INFO L225 Difference]: With dead ends: 79 [2023-11-23 21:13:49,394 INFO L226 Difference]: Without dead ends: 46 [2023-11-23 21:13:49,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:13:49,422 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 9 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:49,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 83 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:13:49,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-23 21:13:49,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2023-11-23 21:13:49,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-23 21:13:49,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2023-11-23 21:13:49,434 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 35 [2023-11-23 21:13:49,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:49,434 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2023-11-23 21:13:49,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:13:49,435 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2023-11-23 21:13:49,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-23 21:13:49,436 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:49,437 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:49,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:13:49,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:49,651 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:49,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:49,652 INFO L85 PathProgramCache]: Analyzing trace with hash -58397433, now seen corresponding path program 1 times [2023-11-23 21:13:49,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:49,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287314193] [2023-11-23 21:13:49,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:49,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:13:49,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:49,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287314193] [2023-11-23 21:13:49,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287314193] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:13:49,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291075398] [2023-11-23 21:13:49,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:49,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:49,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:49,896 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:13:49,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:13:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:49,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:13:49,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:13:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:13:50,081 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:13:50,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291075398] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:50,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:13:50,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-23 21:13:50,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915905650] [2023-11-23 21:13:50,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:50,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:13:50,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:50,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:13:50,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:13:50,087 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:13:50,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:50,263 INFO L93 Difference]: Finished difference Result 88 states and 126 transitions. [2023-11-23 21:13:50,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:13:50,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2023-11-23 21:13:50,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:50,266 INFO L225 Difference]: With dead ends: 88 [2023-11-23 21:13:50,266 INFO L226 Difference]: Without dead ends: 51 [2023-11-23 21:13:50,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:13:50,271 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 9 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:50,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 102 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:13:50,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-23 21:13:50,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2023-11-23 21:13:50,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.394736842105263) internal successors, (53), 39 states have internal predecessors, (53), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-23 21:13:50,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 66 transitions. [2023-11-23 21:13:50,289 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 66 transitions. Word has length 36 [2023-11-23 21:13:50,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:50,290 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 66 transitions. [2023-11-23 21:13:50,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:13:50,290 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 66 transitions. [2023-11-23 21:13:50,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 21:13:50,292 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:50,292 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:50,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:13:50,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:50,496 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:50,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:50,497 INFO L85 PathProgramCache]: Analyzing trace with hash -4392137, now seen corresponding path program 1 times [2023-11-23 21:13:50,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:50,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546547405] [2023-11-23 21:13:50,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:50,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:13:51,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:51,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546547405] [2023-11-23 21:13:51,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546547405] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:13:51,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873724895] [2023-11-23 21:13:51,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:51,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:51,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:51,016 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:13:51,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:13:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:51,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 21:13:51,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:13:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:13:51,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:13:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:13:51,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873724895] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:13:51,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [9281015] [2023-11-23 21:13:51,543 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-11-23 21:13:51,544 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:13:51,548 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:13:51,555 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:13:51,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:13:52,443 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 76 for LOIs [2023-11-23 21:13:52,641 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2023-11-23 21:13:52,755 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:13:55,114 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1079#(and (= (select |#length| 3) 12) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_mulflt_~a#1_22| Int) (|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_mulflt_~b#1_28| Int) (|v_ULTIMATE.start_main_~one~0#1_BEFORE_CALL_1| Int)) (and (= |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_1| |v_ULTIMATE.start_mulflt_~b#1_28|) (= (mod |v_ULTIMATE.start_mulflt_~b#1_28| 4294967296) 0) (<= 1 (mod |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3| 4294967296)) (= |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3| |v_ULTIMATE.start_mulflt_~a#1_22|) (= (mod |v_ULTIMATE.start_main_~one~0#1_BEFORE_CALL_1| 4294967296) (mod |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_1| 4294967296)))) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0))' at error location [2023-11-23 21:13:55,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:13:55,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:13:55,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-11-23 21:13:55,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743307277] [2023-11-23 21:13:55,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:13:55,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 21:13:55,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:55,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 21:13:55,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2023-11-23 21:13:55,118 INFO L87 Difference]: Start difference. First operand 47 states and 66 transitions. Second operand has 19 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-23 21:13:55,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:55,393 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2023-11-23 21:13:55,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:13:55,395 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2023-11-23 21:13:55,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:55,397 INFO L225 Difference]: With dead ends: 71 [2023-11-23 21:13:55,397 INFO L226 Difference]: Without dead ends: 64 [2023-11-23 21:13:55,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2023-11-23 21:13:55,400 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 33 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:55,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 540 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:13:55,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-23 21:13:55,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2023-11-23 21:13:55,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 47 states have internal predecessors, (61), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2023-11-23 21:13:55,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 85 transitions. [2023-11-23 21:13:55,414 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 85 transitions. Word has length 37 [2023-11-23 21:13:55,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:55,415 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 85 transitions. [2023-11-23 21:13:55,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-23 21:13:55,415 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 85 transitions. [2023-11-23 21:13:55,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-23 21:13:55,417 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:55,418 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:55,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:13:55,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:55,640 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:55,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:55,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1977152544, now seen corresponding path program 1 times [2023-11-23 21:13:55,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:55,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780926826] [2023-11-23 21:13:55,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:55,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:55,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:55,999 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 21:13:56,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:56,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780926826] [2023-11-23 21:13:56,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780926826] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:56,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:56,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:13:56,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895490343] [2023-11-23 21:13:56,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:56,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:13:56,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:56,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:13:56,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:13:56,009 INFO L87 Difference]: Start difference. First operand 57 states and 85 transitions. Second operand has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:13:56,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:56,118 INFO L93 Difference]: Finished difference Result 79 states and 113 transitions. [2023-11-23 21:13:56,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:13:56,119 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2023-11-23 21:13:56,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:56,122 INFO L225 Difference]: With dead ends: 79 [2023-11-23 21:13:56,123 INFO L226 Difference]: Without dead ends: 64 [2023-11-23 21:13:56,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:13:56,125 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 16 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:56,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 281 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:13:56,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-23 21:13:56,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2023-11-23 21:13:56,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 47 states have internal predecessors, (61), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-11-23 21:13:56,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2023-11-23 21:13:56,147 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 38 [2023-11-23 21:13:56,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:56,149 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2023-11-23 21:13:56,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:13:56,149 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2023-11-23 21:13:56,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-23 21:13:56,156 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:56,157 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:56,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:13:56,157 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:56,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:56,158 INFO L85 PathProgramCache]: Analyzing trace with hash 648718534, now seen corresponding path program 1 times [2023-11-23 21:13:56,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:56,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864537849] [2023-11-23 21:13:56,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:56,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:13:56,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:56,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864537849] [2023-11-23 21:13:56,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864537849] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:13:56,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400429935] [2023-11-23 21:13:56,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:56,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:56,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:56,384 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:13:56,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:13:56,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:56,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:13:56,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:13:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:13:56,551 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:13:56,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400429935] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:56,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:13:56,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-23 21:13:56,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540129461] [2023-11-23 21:13:56,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:56,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:13:56,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:56,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:13:56,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:13:56,554 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:13:56,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:56,700 INFO L93 Difference]: Finished difference Result 118 states and 174 transitions. [2023-11-23 21:13:56,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:13:56,701 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2023-11-23 21:13:56,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:56,704 INFO L225 Difference]: With dead ends: 118 [2023-11-23 21:13:56,704 INFO L226 Difference]: Without dead ends: 67 [2023-11-23 21:13:56,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:13:56,709 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 13 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:56,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 102 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:13:56,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-23 21:13:56,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2023-11-23 21:13:56,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 48 states have internal predecessors, (63), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-11-23 21:13:56,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 84 transitions. [2023-11-23 21:13:56,721 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 84 transitions. Word has length 41 [2023-11-23 21:13:56,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:56,722 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 84 transitions. [2023-11-23 21:13:56,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:13:56,722 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 84 transitions. [2023-11-23 21:13:56,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-23 21:13:56,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:56,724 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:56,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:13:56,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 21:13:56,944 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:56,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:56,945 INFO L85 PathProgramCache]: Analyzing trace with hash 47388505, now seen corresponding path program 1 times [2023-11-23 21:13:56,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:56,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394523067] [2023-11-23 21:13:56,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:56,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:56,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:57,078 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:13:57,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:57,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394523067] [2023-11-23 21:13:57,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394523067] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:13:57,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464958100] [2023-11-23 21:13:57,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:57,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:57,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:57,080 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:13:57,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:13:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:57,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:13:57,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:13:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:13:57,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:13:57,284 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:13:57,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464958100] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:13:57,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1472154186] [2023-11-23 21:13:57,289 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-11-23 21:13:57,291 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:13:57,292 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:13:57,292 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:13:57,292 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:13:57,793 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 76 for LOIs [2023-11-23 21:13:57,889 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2023-11-23 21:13:58,058 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:13:59,783 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2035#(and (= (select |#length| 3) 12) (<= 1 |#StackHeapBarrier|) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (exists ((|v_ULTIMATE.start_mulflt_~b#1_31| Int) (|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_mulflt_~a#1_25| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~one~0#1_BEFORE_CALL_2| Int)) (and (= |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_mulflt_~a#1_25|) (= |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_2| |v_ULTIMATE.start_mulflt_~b#1_31|) (<= 1 (mod |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_4| 4294967296)) (= (mod |v_ULTIMATE.start_mulflt_~b#1_31| 4294967296) 0) (= (mod |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_2| 4294967296) (mod |v_ULTIMATE.start_main_~one~0#1_BEFORE_CALL_2| 4294967296)))) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0))' at error location [2023-11-23 21:13:59,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:13:59,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:13:59,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-23 21:13:59,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361621209] [2023-11-23 21:13:59,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:13:59,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 21:13:59,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:59,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 21:13:59,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2023-11-23 21:13:59,787 INFO L87 Difference]: Start difference. First operand 58 states and 84 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:14:00,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:14:00,040 INFO L93 Difference]: Finished difference Result 136 states and 207 transitions. [2023-11-23 21:14:00,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:14:00,040 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 42 [2023-11-23 21:14:00,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:14:00,042 INFO L225 Difference]: With dead ends: 136 [2023-11-23 21:14:00,042 INFO L226 Difference]: Without dead ends: 84 [2023-11-23 21:14:00,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2023-11-23 21:14:00,044 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 41 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:14:00,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 137 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:14:00,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-23 21:14:00,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2023-11-23 21:14:00,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 56 states have internal predecessors, (76), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-11-23 21:14:00,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 97 transitions. [2023-11-23 21:14:00,057 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 97 transitions. Word has length 42 [2023-11-23 21:14:00,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:14:00,057 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 97 transitions. [2023-11-23 21:14:00,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:14:00,058 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 97 transitions. [2023-11-23 21:14:00,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-23 21:14:00,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:00,059 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:14:00,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:14:00,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 21:14:00,280 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:00,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:00,281 INFO L85 PathProgramCache]: Analyzing trace with hash 316690685, now seen corresponding path program 1 times [2023-11-23 21:14:00,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:00,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423894785] [2023-11-23 21:14:00,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:00,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:00,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:00,434 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:14:00,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:00,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423894785] [2023-11-23 21:14:00,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423894785] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:14:00,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160308691] [2023-11-23 21:14:00,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:00,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:14:00,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:14:00,436 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:14:00,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:14:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:00,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:14:00,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:14:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:14:00,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:14:00,642 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:14:00,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160308691] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:14:00,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2062066872] [2023-11-23 21:14:00,646 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-11-23 21:14:00,646 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:14:00,646 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:14:00,647 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:14:00,647 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:14:01,132 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 76 for LOIs [2023-11-23 21:14:01,250 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2023-11-23 21:14:01,392 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:14:02,880 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2568#(and (= (select |#length| 3) 12) (<= 1 |#StackHeapBarrier|) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (exists ((|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~one~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_mulflt_~a#1_28| Int) (|v_ULTIMATE.start_mulflt_~b#1_34| Int)) (and (= (mod |v_ULTIMATE.start_mulflt_~b#1_34| 4294967296) 0) (= |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_mulflt_~a#1_28|) (= (mod |v_ULTIMATE.start_main_~one~0#1_BEFORE_CALL_3| 4294967296) (mod |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_3| 4294967296)) (= |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_3| |v_ULTIMATE.start_mulflt_~b#1_34|) (<= 1 (mod |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_5| 4294967296)))) (= (select (select |#memory_int| 1) 1) 0))' at error location [2023-11-23 21:14:02,880 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:14:02,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:14:02,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-11-23 21:14:02,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488712679] [2023-11-23 21:14:02,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:14:02,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:14:02,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:14:02,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:14:02,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2023-11-23 21:14:02,883 INFO L87 Difference]: Start difference. First operand 66 states and 97 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:14:03,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:14:03,057 INFO L93 Difference]: Finished difference Result 136 states and 203 transitions. [2023-11-23 21:14:03,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:14:03,059 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2023-11-23 21:14:03,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:14:03,060 INFO L225 Difference]: With dead ends: 136 [2023-11-23 21:14:03,060 INFO L226 Difference]: Without dead ends: 76 [2023-11-23 21:14:03,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2023-11-23 21:14:03,062 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 25 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:14:03,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 81 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:14:03,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-23 21:14:03,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2023-11-23 21:14:03,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.392156862745098) internal successors, (71), 53 states have internal predecessors, (71), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-11-23 21:14:03,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2023-11-23 21:14:03,081 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 43 [2023-11-23 21:14:03,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:14:03,082 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2023-11-23 21:14:03,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:14:03,082 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2023-11-23 21:14:03,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-23 21:14:03,084 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:03,084 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:14:03,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:14:03,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 21:14:03,292 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:03,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:03,292 INFO L85 PathProgramCache]: Analyzing trace with hash 911212116, now seen corresponding path program 1 times [2023-11-23 21:14:03,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:03,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487478646] [2023-11-23 21:14:03,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:03,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:03,548 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:14:03,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:03,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487478646] [2023-11-23 21:14:03,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487478646] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:14:03,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993591032] [2023-11-23 21:14:03,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:03,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:14:03,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:14:03,553 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:14:03,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 21:14:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:03,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-23 21:14:03,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:14:04,165 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:14:04,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:14:05,406 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:14:05,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993591032] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:14:05,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1727626528] [2023-11-23 21:14:05,410 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-11-23 21:14:05,410 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:14:05,411 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:14:05,411 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:14:05,412 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:14:05,855 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 76 for LOIs [2023-11-23 21:14:05,942 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2023-11-23 21:14:06,078 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:14:08,545 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3120#(and (= (select |#length| 3) 12) (<= 1 |#StackHeapBarrier|) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (exists ((|v_ULTIMATE.start_main_~one~0#1_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_mulflt_~a#1_31| Int) (|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_mulflt_~b#1_37| Int)) (and (= |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_6| |v_ULTIMATE.start_mulflt_~a#1_31|) (= (mod |v_ULTIMATE.start_mulflt_~b#1_37| 4294967296) 0) (= |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_mulflt_~b#1_37|) (= (mod |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_4| 4294967296) (mod |v_ULTIMATE.start_main_~one~0#1_BEFORE_CALL_8| 4294967296)) (<= 1 (mod |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_6| 4294967296)))) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0))' at error location [2023-11-23 21:14:08,545 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:14:08,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:14:08,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 16] total 33 [2023-11-23 21:14:08,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200558082] [2023-11-23 21:14:08,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:14:08,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-23 21:14:08,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:14:08,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-23 21:14:08,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2186, Unknown=0, NotChecked=0, Total=2352 [2023-11-23 21:14:08,553 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand has 33 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 4 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-23 21:14:13,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:14:13,811 INFO L93 Difference]: Finished difference Result 216 states and 399 transitions. [2023-11-23 21:14:13,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-23 21:14:13,816 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 4 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 44 [2023-11-23 21:14:13,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:14:13,819 INFO L225 Difference]: With dead ends: 216 [2023-11-23 21:14:13,819 INFO L226 Difference]: Without dead ends: 149 [2023-11-23 21:14:13,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2952 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1025, Invalid=9687, Unknown=0, NotChecked=0, Total=10712 [2023-11-23 21:14:13,827 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 235 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 1823 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 1876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:14:13,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 967 Invalid, 1876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1823 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-23 21:14:13,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-23 21:14:13,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 74. [2023-11-23 21:14:13,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.3898305084745763) internal successors, (82), 62 states have internal predecessors, (82), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2023-11-23 21:14:13,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 118 transitions. [2023-11-23 21:14:13,852 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 118 transitions. Word has length 44 [2023-11-23 21:14:13,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:14:13,852 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 118 transitions. [2023-11-23 21:14:13,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 4 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-23 21:14:13,853 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 118 transitions. [2023-11-23 21:14:13,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-23 21:14:13,854 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:13,854 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:14:13,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 21:14:14,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:14:14,076 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:14,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:14,077 INFO L85 PathProgramCache]: Analyzing trace with hash -2038379471, now seen corresponding path program 1 times [2023-11-23 21:14:14,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:14,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283436436] [2023-11-23 21:14:14,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:14,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:14:14,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:14,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283436436] [2023-11-23 21:14:14,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283436436] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:14:14,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741815283] [2023-11-23 21:14:14,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:14,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:14:14,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:14:14,461 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:14:14,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 21:14:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:14,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:14:14,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:14:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-23 21:14:14,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:14:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-23 21:14:14,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741815283] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:14:14,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1497655839] [2023-11-23 21:14:14,856 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-11-23 21:14:14,857 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:14:14,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:14:14,858 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:14:14,858 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:14:15,239 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 33 for LOIs [2023-11-23 21:14:15,266 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2023-11-23 21:14:15,394 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:14:16,420 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3895#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~one~0#1_BEFORE_CALL_9| Int)) (= (mod |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_5| 4294967296) (mod |v_ULTIMATE.start_main_~one~0#1_BEFORE_CALL_9| 4294967296))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_9| Int)) (<= (mod |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_9| 4294967296) 4294967294)))' at error location [2023-11-23 21:14:16,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:14:16,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:14:16,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2023-11-23 21:14:16,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393980253] [2023-11-23 21:14:16,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:14:16,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 21:14:16,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:14:16,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 21:14:16,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2023-11-23 21:14:16,423 INFO L87 Difference]: Start difference. First operand 74 states and 118 transitions. Second operand has 17 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-23 21:14:17,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:14:17,142 INFO L93 Difference]: Finished difference Result 154 states and 246 transitions. [2023-11-23 21:14:17,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-23 21:14:17,143 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 48 [2023-11-23 21:14:17,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:14:17,144 INFO L225 Difference]: With dead ends: 154 [2023-11-23 21:14:17,144 INFO L226 Difference]: Without dead ends: 86 [2023-11-23 21:14:17,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=244, Invalid=2108, Unknown=0, NotChecked=0, Total=2352 [2023-11-23 21:14:17,147 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 72 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:14:17,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 316 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:14:17,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-23 21:14:17,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 68. [2023-11-23 21:14:17,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 58 states have internal predecessors, (76), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2023-11-23 21:14:17,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 102 transitions. [2023-11-23 21:14:17,159 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 102 transitions. Word has length 48 [2023-11-23 21:14:17,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:14:17,159 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 102 transitions. [2023-11-23 21:14:17,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-23 21:14:17,160 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 102 transitions. [2023-11-23 21:14:17,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-23 21:14:17,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:17,161 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:14:17,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 21:14:17,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 21:14:17,376 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:17,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:17,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1306246965, now seen corresponding path program 2 times [2023-11-23 21:14:17,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:17,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377529166] [2023-11-23 21:14:17,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:17,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:17,548 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:14:17,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:17,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377529166] [2023-11-23 21:14:17,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377529166] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:14:17,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796782308] [2023-11-23 21:14:17,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:14:17,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:14:17,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:14:17,550 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:14:17,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 21:14:17,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-23 21:14:17,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:14:17,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:14:17,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:14:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:14:17,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:14:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:14:17,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796782308] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:14:17,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1872137239] [2023-11-23 21:14:17,921 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-11-23 21:14:17,921 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:14:17,922 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:14:17,922 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:14:17,922 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:14:18,244 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 76 for LOIs [2023-11-23 21:14:18,311 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2023-11-23 21:14:18,397 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:14:19,889 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4534#(and (= (select |#length| 3) 12) (<= 1 |#StackHeapBarrier|) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (exists ((|v_ULTIMATE.start_mulflt_~b#1_42| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_mulflt_~a#1_36| Int) (|v_ULTIMATE.start_main_~one~0#1_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_10| Int)) (and (= (mod |v_ULTIMATE.start_main_~one~0#1_BEFORE_CALL_10| 4294967296) (mod |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_6| 4294967296)) (= |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_6| |v_ULTIMATE.start_mulflt_~b#1_42|) (<= 1 (mod |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_10| 4294967296)) (= |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_10| |v_ULTIMATE.start_mulflt_~a#1_36|) (= (mod |v_ULTIMATE.start_mulflt_~b#1_42| 4294967296) 0))))' at error location [2023-11-23 21:14:19,889 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:14:19,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:14:19,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-23 21:14:19,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873400581] [2023-11-23 21:14:19,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:14:19,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 21:14:19,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:14:19,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 21:14:19,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2023-11-23 21:14:19,893 INFO L87 Difference]: Start difference. First operand 68 states and 102 transitions. Second operand has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:14:20,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:14:20,252 INFO L93 Difference]: Finished difference Result 182 states and 288 transitions. [2023-11-23 21:14:20,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-23 21:14:20,258 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2023-11-23 21:14:20,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:14:20,262 INFO L225 Difference]: With dead ends: 182 [2023-11-23 21:14:20,262 INFO L226 Difference]: Without dead ends: 124 [2023-11-23 21:14:20,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=399, Invalid=1493, Unknown=0, NotChecked=0, Total=1892 [2023-11-23 21:14:20,264 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 117 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:14:20,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 187 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:14:20,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-23 21:14:20,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2023-11-23 21:14:20,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 68 states have (on average 1.4558823529411764) internal successors, (99), 72 states have internal predecessors, (99), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2023-11-23 21:14:20,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 125 transitions. [2023-11-23 21:14:20,297 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 125 transitions. Word has length 51 [2023-11-23 21:14:20,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:14:20,298 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 125 transitions. [2023-11-23 21:14:20,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:14:20,298 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 125 transitions. [2023-11-23 21:14:20,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 21:14:20,300 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:20,300 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:14:20,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 21:14:20,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:14:20,520 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:20,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:20,521 INFO L85 PathProgramCache]: Analyzing trace with hash -851355933, now seen corresponding path program 2 times [2023-11-23 21:14:20,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:20,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805145837] [2023-11-23 21:14:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:20,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:20,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:20,943 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-23 21:14:20,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:20,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805145837] [2023-11-23 21:14:20,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805145837] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:14:20,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124156550] [2023-11-23 21:14:20,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:14:20,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:14:20,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:14:20,945 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:14:20,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 21:14:21,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-23 21:14:21,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:14:21,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 21:14:21,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:14:21,651 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:14:21,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:14:22,081 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-23 21:14:22,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124156550] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:14:22,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [634040046] [2023-11-23 21:14:22,084 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-11-23 21:14:22,084 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:14:22,084 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:14:22,085 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:14:22,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:14:22,513 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 76 for LOIs [2023-11-23 21:14:22,598 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2023-11-23 21:14:22,728 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:14:24,703 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5236#(and (= (select |#length| 3) 12) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~one~0#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_mulflt_~a#1_39| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_mulflt_~b#1_45| Int)) (and (= (mod |v_ULTIMATE.start_mulflt_~b#1_45| 4294967296) 0) (= (mod |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_7| 4294967296) (mod |v_ULTIMATE.start_main_~one~0#1_BEFORE_CALL_11| 4294967296)) (= |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_mulflt_~a#1_39|) (= |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_7| |v_ULTIMATE.start_mulflt_~b#1_45|) (<= 1 (mod |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_11| 4294967296)))) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0))' at error location [2023-11-23 21:14:24,704 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:14:24,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:14:24,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 25 [2023-11-23 21:14:24,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646325670] [2023-11-23 21:14:24,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:14:24,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-23 21:14:24,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:14:24,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-23 21:14:24,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2023-11-23 21:14:24,707 INFO L87 Difference]: Start difference. First operand 82 states and 125 transitions. Second operand has 25 states, 25 states have (on average 3.04) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:14:26,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:14:26,737 INFO L93 Difference]: Finished difference Result 191 states and 276 transitions. [2023-11-23 21:14:26,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-23 21:14:26,738 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2023-11-23 21:14:26,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:14:26,740 INFO L225 Difference]: With dead ends: 191 [2023-11-23 21:14:26,740 INFO L226 Difference]: Without dead ends: 115 [2023-11-23 21:14:26,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=539, Invalid=2113, Unknown=0, NotChecked=0, Total=2652 [2023-11-23 21:14:26,743 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 124 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:14:26,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 293 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 21:14:26,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-23 21:14:26,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 75. [2023-11-23 21:14:26,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 64 states have (on average 1.484375) internal successors, (95), 67 states have internal predecessors, (95), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-23 21:14:26,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 110 transitions. [2023-11-23 21:14:26,758 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 110 transitions. Word has length 54 [2023-11-23 21:14:26,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:14:26,758 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 110 transitions. [2023-11-23 21:14:26,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:14:26,759 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 110 transitions. [2023-11-23 21:14:26,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-23 21:14:26,760 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:26,760 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:14:26,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 21:14:26,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 21:14:26,968 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:26,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:26,968 INFO L85 PathProgramCache]: Analyzing trace with hash 641976660, now seen corresponding path program 3 times [2023-11-23 21:14:26,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:26,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162251739] [2023-11-23 21:14:26,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:26,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 3 proven. 143 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:14:27,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:27,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162251739] [2023-11-23 21:14:27,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162251739] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:14:27,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912774181] [2023-11-23 21:14:27,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:14:27,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:14:27,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:14:27,712 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:14:27,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce611e5b-3672-4db5-babe-5248a6499169/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 21:14:27,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:14:27,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:14:27,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-23 21:14:27,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:14:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 7 proven. 143 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:14:28,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:14:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 7 proven. 143 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:14:31,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912774181] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:14:31,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [480541563] [2023-11-23 21:14:31,297 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-11-23 21:14:31,298 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:14:31,298 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:14:31,298 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:14:31,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:14:31,703 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 76 for LOIs [2023-11-23 21:14:31,775 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2023-11-23 21:14:31,881 INFO L180 IcfgInterpreter]: Interpretation finished