./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2 --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 f330893f1140a32f6e6dacd6cc5115391759545d59ea17334f6f3b644ed5a51c --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 11:22:06,143 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 11:22:06,212 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 11:22:06,217 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 11:22:06,218 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 11:22:06,244 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 11:22:06,245 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 11:22:06,245 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 11:22:06,246 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 11:22:06,246 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 11:22:06,247 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 11:22:06,251 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 11:22:06,251 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 11:22:06,253 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 11:22:06,253 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 11:22:06,254 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 11:22:06,254 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 11:22:06,255 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 11:22:06,255 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 11:22:06,255 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 11:22:06,256 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 11:22:06,260 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 11:22:06,261 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 11:22:06,261 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 11:22:06,261 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 11:22:06,262 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 11:22:06,262 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 11:22:06,262 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 11:22:06,262 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 11:22:06,263 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 11:22:06,263 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 11:22:06,263 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 11:22:06,267 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 11:22:06,267 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 11:22:06,267 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 11:22:06,268 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 11:22:06,268 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 11:22:06,268 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 11:22:06,268 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:22:06,269 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 11:22:06,269 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 11:22:06,269 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 11:22:06,269 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 11:22:06,270 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 11:22:06,270 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 11:22:06,270 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 11:22:06,271 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 11:22:06,271 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_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f330893f1140a32f6e6dacd6cc5115391759545d59ea17334f6f3b644ed5a51c [2024-11-02 11:22:06,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 11:22:06,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 11:22:06,631 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 11:22:06,633 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 11:22:06,634 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 11:22:06,636 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c Unable to find full path for "g++" [2024-11-02 11:22:08,818 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 11:22:09,078 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 11:22:09,079 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c [2024-11-02 11:22:09,093 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/data/3eca75ac7/e963e05881b14c5f8bcffb8397aa4d77/FLAGe55d036a3 [2024-11-02 11:22:09,428 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/data/3eca75ac7/e963e05881b14c5f8bcffb8397aa4d77 [2024-11-02 11:22:09,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 11:22:09,434 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 11:22:09,435 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 11:22:09,435 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 11:22:09,443 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 11:22:09,443 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:22:09" (1/1) ... [2024-11-02 11:22:09,444 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62feffe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:09, skipping insertion in model container [2024-11-02 11:22:09,445 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:22:09" (1/1) ... [2024-11-02 11:22:09,476 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 11:22:09,663 WARN L251 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_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c[728,741] [2024-11-02 11:22:09,710 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:22:09,725 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 11:22:09,739 WARN L251 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_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c[728,741] [2024-11-02 11:22:09,774 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:22:09,791 INFO L204 MainTranslator]: Completed translation [2024-11-02 11:22:09,791 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:09 WrapperNode [2024-11-02 11:22:09,791 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 11:22:09,793 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 11:22:09,793 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 11:22:09,793 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 11:22:09,798 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:09" (1/1) ... [2024-11-02 11:22:09,806 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:09" (1/1) ... [2024-11-02 11:22:09,830 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 147 [2024-11-02 11:22:09,831 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 11:22:09,832 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 11:22:09,832 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 11:22:09,832 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 11:22:09,842 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:09" (1/1) ... [2024-11-02 11:22:09,842 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:09" (1/1) ... [2024-11-02 11:22:09,844 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:09" (1/1) ... [2024-11-02 11:22:09,845 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:09" (1/1) ... [2024-11-02 11:22:09,849 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:09" (1/1) ... [2024-11-02 11:22:09,856 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:09" (1/1) ... [2024-11-02 11:22:09,858 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:09" (1/1) ... [2024-11-02 11:22:09,860 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:09" (1/1) ... [2024-11-02 11:22:09,862 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 11:22:09,863 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 11:22:09,863 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 11:22:09,864 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 11:22:09,864 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:09" (1/1) ... [2024-11-02 11:22:09,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:22:09,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:22:09,906 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 11:22:09,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 11:22:09,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 11:22:09,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 11:22:09,941 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-02 11:22:09,943 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-02 11:22:09,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 11:22:09,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 11:22:09,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-02 11:22:09,944 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-02 11:22:10,040 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 11:22:10,042 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 11:22:10,517 INFO L? ?]: Removed 62 outVars from TransFormulas that were not future-live. [2024-11-02 11:22:10,517 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 11:22:10,788 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 11:22:10,788 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-02 11:22:10,789 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:22:10 BoogieIcfgContainer [2024-11-02 11:22:10,789 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 11:22:10,792 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 11:22:10,792 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 11:22:10,796 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 11:22:10,796 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:22:09" (1/3) ... [2024-11-02 11:22:10,800 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55df124c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:22:10, skipping insertion in model container [2024-11-02 11:22:10,800 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:09" (2/3) ... [2024-11-02 11:22:10,801 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55df124c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:22:10, skipping insertion in model container [2024-11-02 11:22:10,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:22:10" (3/3) ... [2024-11-02 11:22:10,802 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2024-11-02 11:22:10,830 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 11:22:10,830 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 11:22:10,897 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 11:22:10,907 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@20e8a534, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 11:22:10,907 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 11:22:10,912 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) [2024-11-02 11:22:10,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-02 11:22:10,922 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:22:10,923 INFO L215 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] [2024-11-02 11:22:10,923 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:22:10,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:22:10,930 INFO L85 PathProgramCache]: Analyzing trace with hash -664180398, now seen corresponding path program 1 times [2024-11-02 11:22:10,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:22:10,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076439895] [2024-11-02 11:22:10,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:22:10,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:22:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:22:11,454 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-02 11:22:11,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:22:11,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076439895] [2024-11-02 11:22:11,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076439895] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:22:11,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63755231] [2024-11-02 11:22:11,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:22:11,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:22:11,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:22:11,459 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:22:11,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 11:22:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:22:11,593 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-02 11:22:11,602 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:22:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 11:22:11,665 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 11:22:11,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63755231] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:22:11,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 11:22:11,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-02 11:22:11,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158696501] [2024-11-02 11:22:11,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:22:11,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:22:11,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:22:11,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:22:11,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-02 11:22:11,703 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) [2024-11-02 11:22:11,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:22:11,905 INFO L93 Difference]: Finished difference Result 88 states and 138 transitions. [2024-11-02 11:22:11,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 11:22:11,912 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 [2024-11-02 11:22:11,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:22:11,922 INFO L225 Difference]: With dead ends: 88 [2024-11-02 11:22:11,922 INFO L226 Difference]: Without dead ends: 47 [2024-11-02 11:22:11,925 INFO L431 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 [2024-11-02 11:22:11,929 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 11 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:22:11,930 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 86 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:22:11,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-02 11:22:11,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2024-11-02 11:22:11,968 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) [2024-11-02 11:22:11,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2024-11-02 11:22:11,971 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 32 [2024-11-02 11:22:11,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:22:11,972 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 54 transitions. [2024-11-02 11:22:11,972 INFO L472 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) [2024-11-02 11:22:11,973 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 54 transitions. [2024-11-02 11:22:11,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-02 11:22:11,975 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:22:11,975 INFO L215 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] [2024-11-02 11:22:11,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 11:22:12,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:22:12,177 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:22:12,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:22:12,178 INFO L85 PathProgramCache]: Analyzing trace with hash -803095274, now seen corresponding path program 1 times [2024-11-02 11:22:12,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:22:12,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936334364] [2024-11-02 11:22:12,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:22:12,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:22:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:22:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-02 11:22:12,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:22:12,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936334364] [2024-11-02 11:22:12,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936334364] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:22:12,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223015908] [2024-11-02 11:22:12,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:22:12,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:22:12,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:22:12,365 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:22:12,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 11:22:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:22:12,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 11:22:12,459 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:22:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 11:22:12,518 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 11:22:12,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223015908] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:22:12,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 11:22:12,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-02 11:22:12,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892136499] [2024-11-02 11:22:12,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:22:12,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:22:12,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:22:12,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:22:12,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-02 11:22:12,521 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) [2024-11-02 11:22:12,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:22:12,658 INFO L93 Difference]: Finished difference Result 77 states and 108 transitions. [2024-11-02 11:22:12,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:22:12,659 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 [2024-11-02 11:22:12,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:22:12,660 INFO L225 Difference]: With dead ends: 77 [2024-11-02 11:22:12,660 INFO L226 Difference]: Without dead ends: 44 [2024-11-02 11:22:12,661 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-02 11:22:12,662 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:22:12,666 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 86 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:22:12,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-02 11:22:12,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2024-11-02 11:22:12,677 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) [2024-11-02 11:22:12,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2024-11-02 11:22:12,682 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 35 [2024-11-02 11:22:12,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:22:12,682 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2024-11-02 11:22:12,683 INFO L472 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) [2024-11-02 11:22:12,683 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2024-11-02 11:22:12,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-02 11:22:12,686 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:22:12,687 INFO L215 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] [2024-11-02 11:22:12,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 11:22:12,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:22:12,889 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:22:12,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:22:12,890 INFO L85 PathProgramCache]: Analyzing trace with hash 119463020, now seen corresponding path program 1 times [2024-11-02 11:22:12,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:22:12,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735070790] [2024-11-02 11:22:12,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:22:12,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:22:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:22:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-02 11:22:13,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:22:13,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735070790] [2024-11-02 11:22:13,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735070790] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:22:13,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247299651] [2024-11-02 11:22:13,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:22:13,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:22:13,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:22:13,162 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:22:13,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 11:22:13,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:22:13,249 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-02 11:22:13,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:22:13,579 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-02 11:22:13,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:22:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-02 11:22:14,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247299651] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 11:22:14,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [602692504] [2024-11-02 11:22:14,212 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-02 11:22:14,212 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:22:14,217 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:22:14,223 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:22:14,224 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:22:14,614 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 43 for LOIs [2024-11-02 11:22:14,791 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 11:22:15,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [602692504] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:22:15,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-02 11:22:15,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 15, 13] total 34 [2024-11-02 11:22:15,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285270229] [2024-11-02 11:22:15,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:22:15,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-02 11:22:15,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:22:15,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-02 11:22:15,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2024-11-02 11:22:15,962 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand has 10 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-02 11:22:16,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:22:16,165 INFO L93 Difference]: Finished difference Result 93 states and 129 transitions. [2024-11-02 11:22:16,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-02 11:22:16,166 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 36 [2024-11-02 11:22:16,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:22:16,168 INFO L225 Difference]: With dead ends: 93 [2024-11-02 11:22:16,168 INFO L226 Difference]: Without dead ends: 56 [2024-11-02 11:22:16,169 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2024-11-02 11:22:16,170 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 47 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:22:16,171 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 113 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:22:16,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-02 11:22:16,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2024-11-02 11:22:16,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 states have internal predecessors, (56), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-02 11:22:16,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2024-11-02 11:22:16,184 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 36 [2024-11-02 11:22:16,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:22:16,185 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2024-11-02 11:22:16,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-02 11:22:16,186 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2024-11-02 11:22:16,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-02 11:22:16,187 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:22:16,187 INFO L215 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] [2024-11-02 11:22:16,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 11:22:16,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:22:16,393 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:22:16,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:22:16,396 INFO L85 PathProgramCache]: Analyzing trace with hash 567587548, now seen corresponding path program 1 times [2024-11-02 11:22:16,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:22:16,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971096377] [2024-11-02 11:22:16,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:22:16,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:22:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:22:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-02 11:22:16,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:22:16,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971096377] [2024-11-02 11:22:16,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971096377] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:22:16,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667646049] [2024-11-02 11:22:16,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:22:16,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:22:16,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:22:16,989 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:22:16,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 11:22:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:22:17,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-02 11:22:17,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:22:17,263 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-02 11:22:17,263 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:22:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-02 11:22:17,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667646049] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 11:22:17,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2124301223] [2024-11-02 11:22:17,784 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-02 11:22:17,784 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:22:17,785 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:22:17,785 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:22:17,785 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:22:18,032 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 43 for LOIs [2024-11-02 11:22:18,235 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 11:22:19,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2124301223] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:22:19,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-02 11:22:19,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11, 15, 13] total 34 [2024-11-02 11:22:19,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852271527] [2024-11-02 11:22:19,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:22:19,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-02 11:22:19,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:22:19,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-02 11:22:19,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2024-11-02 11:22:19,831 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand has 11 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-02 11:22:20,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:22:20,117 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2024-11-02 11:22:20,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-02 11:22:20,118 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2024-11-02 11:22:20,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:22:20,119 INFO L225 Difference]: With dead ends: 87 [2024-11-02 11:22:20,120 INFO L226 Difference]: Without dead ends: 53 [2024-11-02 11:22:20,121 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2024-11-02 11:22:20,122 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 45 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 11:22:20,122 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 135 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 11:22:20,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-02 11:22:20,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-11-02 11:22:20,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 44 states have internal predecessors, (59), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-02 11:22:20,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2024-11-02 11:22:20,138 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 37 [2024-11-02 11:22:20,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:22:20,138 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2024-11-02 11:22:20,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-02 11:22:20,139 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2024-11-02 11:22:20,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-02 11:22:20,140 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:22:20,140 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 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] [2024-11-02 11:22:20,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-02 11:22:20,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:22:20,341 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:22:20,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:22:20,342 INFO L85 PathProgramCache]: Analyzing trace with hash 897664810, now seen corresponding path program 1 times [2024-11-02 11:22:20,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:22:20,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541486176] [2024-11-02 11:22:20,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:22:20,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:22:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:22:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-02 11:22:20,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:22:20,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541486176] [2024-11-02 11:22:20,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541486176] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:22:20,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774660059] [2024-11-02 11:22:20,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:22:20,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:22:20,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:22:20,754 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:22:20,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-02 11:22:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:22:20,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-02 11:22:20,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:22:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-02 11:22:21,008 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:22:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-02 11:22:21,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774660059] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 11:22:21,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1381573431] [2024-11-02 11:22:21,330 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-02 11:22:21,330 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:22:21,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:22:21,331 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:22:21,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:22:23,461 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 99 for LOIs [2024-11-02 11:22:23,593 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 46 for LOIs [2024-11-02 11:22:23,707 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 11:22:36,883 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1698#(and (exists ((|v_ULTIMATE.start_main_#t~ret22#1_33| Int) (|v_ULTIMATE.start_mulflt_~b#1_41| Int) (|v_ULTIMATE.start_main_~mb~2#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~zero~0#1_47| Int) (|v_ULTIMATE.start_main_~a~0#1_36| Int) (|v_ULTIMATE.start_mulflt_~a#1_30| Int)) (and (<= 1 (mod |v_ULTIMATE.start_main_~zero~0#1_47| 4294967296)) (= |v_ULTIMATE.start_main_#t~ret22#1_33| |v_ULTIMATE.start_mulflt_~b#1_41|) (= (mod |v_ULTIMATE.start_mulflt_~b#1_41| 4294967296) 0) (= (mod |v_ULTIMATE.start_main_~zero~0#1_47| 4294967296) (mod |v_ULTIMATE.start_main_~a~0#1_36| 4294967296)) (or (and (= (mod |v_ULTIMATE.start_main_~mb~2#1_BEFORE_CALL_3| 4294967296) 0) (= |v_ULTIMATE.start_main_#t~ret22#1_33| 0)) (exists ((v_base2flt_~m_50 Int) (v_base2flt_~e_77 Int) (v_base2flt_~m_114 Int)) (and (<= 0 (+ v_base2flt_~e_77 128)) (<= 8388608 (mod v_base2flt_~m_114 2147483648)) (= (* 16777216 (mod (+ v_base2flt_~e_77 128) 4294967296)) |v_ULTIMATE.start_main_#t~ret22#1_33|) (= (mod v_base2flt_~m_50 4294967296) 0)))) (= |v_ULTIMATE.start_main_~a~0#1_36| |v_ULTIMATE.start_mulflt_~a#1_30|))) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-02 11:22:36,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 11:22:36,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 11:22:36,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 23 [2024-11-02 11:22:36,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68770207] [2024-11-02 11:22:36,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 11:22:36,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-02 11:22:36,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:22:36,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-02 11:22:36,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1583, Unknown=1, NotChecked=0, Total=1722 [2024-11-02 11:22:36,888 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 23 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-02 11:22:37,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:22:37,128 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2024-11-02 11:22:37,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-02 11:22:37,129 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 40 [2024-11-02 11:22:37,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:22:37,130 INFO L225 Difference]: With dead ends: 64 [2024-11-02 11:22:37,130 INFO L226 Difference]: Without dead ends: 57 [2024-11-02 11:22:37,131 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=144, Invalid=1661, Unknown=1, NotChecked=0, Total=1806 [2024-11-02 11:22:37,132 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 40 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:22:37,133 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 516 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:22:37,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-02 11:22:37,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2024-11-02 11:22:37,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 states have internal predecessors, (57), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-02 11:22:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2024-11-02 11:22:37,156 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 40 [2024-11-02 11:22:37,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:22:37,158 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2024-11-02 11:22:37,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-02 11:22:37,160 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2024-11-02 11:22:37,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-02 11:22:37,161 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:22:37,162 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 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] [2024-11-02 11:22:37,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-02 11:22:37,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:22:37,363 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:22:37,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:22:37,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1751903613, now seen corresponding path program 1 times [2024-11-02 11:22:37,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:22:37,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360256159] [2024-11-02 11:22:37,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:22:37,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:22:37,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:22:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-02 11:22:37,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:22:37,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360256159] [2024-11-02 11:22:37,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360256159] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:22:37,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:22:37,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-02 11:22:37,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782475943] [2024-11-02 11:22:37,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:22:37,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 11:22:37,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:22:37,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 11:22:37,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-02 11:22:37,707 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 8 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2024-11-02 11:22:37,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:22:37,841 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2024-11-02 11:22:37,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 11:22:37,843 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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 41 [2024-11-02 11:22:37,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:22:37,844 INFO L225 Difference]: With dead ends: 75 [2024-11-02 11:22:37,844 INFO L226 Difference]: Without dead ends: 60 [2024-11-02 11:22:37,844 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-02 11:22:37,845 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 268 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 [2024-11-02 11:22:37,846 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 268 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:22:37,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-02 11:22:37,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2024-11-02 11:22:37,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 47 states have internal predecessors, (59), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-02 11:22:37,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 72 transitions. [2024-11-02 11:22:37,869 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 72 transitions. Word has length 41 [2024-11-02 11:22:37,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:22:37,869 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 72 transitions. [2024-11-02 11:22:37,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2024-11-02 11:22:37,870 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 72 transitions. [2024-11-02 11:22:37,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-02 11:22:37,871 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:22:37,871 INFO L215 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, 1] [2024-11-02 11:22:37,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 11:22:37,871 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:22:37,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:22:37,876 INFO L85 PathProgramCache]: Analyzing trace with hash 853378723, now seen corresponding path program 1 times [2024-11-02 11:22:37,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:22:37,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812521795] [2024-11-02 11:22:37,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:22:37,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:22:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:22:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-02 11:22:38,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:22:38,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812521795] [2024-11-02 11:22:38,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812521795] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:22:38,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865805005] [2024-11-02 11:22:38,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:22:38,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:22:38,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:22:38,214 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:22:38,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d675ea2-9e48-4ae6-9d7c-bc63e56964cd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-02 11:22:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:22:38,339 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-02 11:22:38,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:22:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-02 11:22:38,432 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:22:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-02 11:22:38,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865805005] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 11:22:38,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1128649864] [2024-11-02 11:22:38,816 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2024-11-02 11:22:38,816 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:22:38,816 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:22:38,817 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:22:38,817 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:22:40,822 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2024-11-02 11:22:40,835 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 46 for LOIs [2024-11-02 11:22:40,991 INFO L180 IcfgInterpreter]: Interpretation finished