./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje --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 644fedc149cdfea0c0b39babfd09647f4fb573c27a060d8d57a08553303664a9 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 06:02:51,667 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 06:02:51,737 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 06:02:51,742 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 06:02:51,742 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 06:02:51,787 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 06:02:51,787 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 06:02:51,788 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 06:02:51,789 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 06:02:51,790 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 06:02:51,790 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 06:02:51,791 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 06:02:51,791 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 06:02:51,792 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 06:02:51,795 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 06:02:51,795 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 06:02:51,795 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 06:02:51,796 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 06:02:51,796 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 06:02:51,796 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 06:02:51,798 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 06:02:51,798 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 06:02:51,799 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 06:02:51,802 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 06:02:51,803 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 06:02:51,803 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 06:02:51,813 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 06:02:51,813 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 06:02:51,814 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 06:02:51,814 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 06:02:51,814 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 06:02:51,814 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 06:02:51,815 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 06:02:51,815 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 06:02:51,815 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 06:02:51,815 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 06:02:51,816 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 06:02:51,816 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 06:02:51,816 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:02:51,816 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 06:02:51,817 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 06:02:51,817 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 06:02:51,818 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 06:02:51,818 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 06:02:51,818 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 06:02:51,818 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 06:02:51,819 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 06:02:51,819 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_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 644fedc149cdfea0c0b39babfd09647f4fb573c27a060d8d57a08553303664a9 [2024-11-09 06:02:52,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 06:02:52,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 06:02:52,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 06:02:52,110 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 06:02:52,111 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 06:02:52,112 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound5.c Unable to find full path for "g++" [2024-11-09 06:02:54,309 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 06:02:54,474 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 06:02:54,477 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound5.c [2024-11-09 06:02:54,486 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/data/a6cf00a8b/b287cef3583a46acacbcf76bf7eada8d/FLAGc390f3686 [2024-11-09 06:02:54,509 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/data/a6cf00a8b/b287cef3583a46acacbcf76bf7eada8d [2024-11-09 06:02:54,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 06:02:54,513 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 06:02:54,514 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 06:02:54,516 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 06:02:54,523 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 06:02:54,523 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:02:54" (1/1) ... [2024-11-09 06:02:54,524 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28ffa04b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:02:54, skipping insertion in model container [2024-11-09 06:02:54,527 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:02:54" (1/1) ... [2024-11-09 06:02:54,552 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 06:02:54,743 WARN L250 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_cf4ee060-9c05-44ee-bd92-a78423d5587f/sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound5.c[709,722] [2024-11-09 06:02:54,765 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:02:54,775 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 06:02:54,789 WARN L250 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_cf4ee060-9c05-44ee-bd92-a78423d5587f/sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound5.c[709,722] [2024-11-09 06:02:54,800 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:02:54,823 INFO L204 MainTranslator]: Completed translation [2024-11-09 06:02:54,823 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:02:54 WrapperNode [2024-11-09 06:02:54,823 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 06:02:54,825 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 06:02:54,825 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 06:02:54,825 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 06:02:54,833 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:02:54" (1/1) ... [2024-11-09 06:02:54,840 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:02:54" (1/1) ... [2024-11-09 06:02:54,856 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 39 [2024-11-09 06:02:54,857 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 06:02:54,858 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 06:02:54,858 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 06:02:54,858 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 06:02:54,867 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:02:54" (1/1) ... [2024-11-09 06:02:54,867 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:02:54" (1/1) ... [2024-11-09 06:02:54,868 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:02:54" (1/1) ... [2024-11-09 06:02:54,869 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:02:54" (1/1) ... [2024-11-09 06:02:54,875 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:02:54" (1/1) ... [2024-11-09 06:02:54,885 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:02:54" (1/1) ... [2024-11-09 06:02:54,886 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:02:54" (1/1) ... [2024-11-09 06:02:54,887 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:02:54" (1/1) ... [2024-11-09 06:02:54,889 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 06:02:54,890 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 06:02:54,890 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 06:02:54,890 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 06:02:54,891 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:02:54" (1/1) ... [2024-11-09 06:02:54,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:02:54,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:02:54,925 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 06:02:54,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 06:02:54,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 06:02:54,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 06:02:54,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 06:02:54,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 06:02:54,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 06:02:54,966 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 06:02:55,043 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 06:02:55,048 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 06:02:55,232 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-11-09 06:02:55,234 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 06:02:55,296 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 06:02:55,300 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 06:02:55,300 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:02:55 BoogieIcfgContainer [2024-11-09 06:02:55,301 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 06:02:55,303 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 06:02:55,304 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 06:02:55,311 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 06:02:55,311 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:02:54" (1/3) ... [2024-11-09 06:02:55,312 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27bde3dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:02:55, skipping insertion in model container [2024-11-09 06:02:55,312 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:02:54" (2/3) ... [2024-11-09 06:02:55,313 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27bde3dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:02:55, skipping insertion in model container [2024-11-09 06:02:55,313 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:02:55" (3/3) ... [2024-11-09 06:02:55,314 INFO L112 eAbstractionObserver]: Analyzing ICFG freire2_valuebound5.c [2024-11-09 06:02:55,334 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 06:02:55,334 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 06:02:55,403 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:02:55,413 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;@7baca009, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:02:55,413 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 06:02:55,418 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 06:02:55,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 06:02:55,424 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:02:55,424 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 06:02:55,425 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:02:55,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:02:55,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1529432920, now seen corresponding path program 1 times [2024-11-09 06:02:55,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:02:55,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391664468] [2024-11-09 06:02:55,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:02:55,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:02:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:02:55,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171909123] [2024-11-09 06:02:55,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:02:55,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:02:55,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:02:55,548 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:02:55,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 06:02:55,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 06:02:55,601 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 06:02:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 06:02:55,628 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-09 06:02:55,630 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-09 06:02:55,631 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-09 06:02:55,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 06:02:55,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-09 06:02:55,837 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-09 06:02:55,850 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-09 06:02:55,853 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 06:02:55 BoogieIcfgContainer [2024-11-09 06:02:55,854 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-09 06:02:55,854 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-09 06:02:55,855 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-09 06:02:55,855 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-09 06:02:55,855 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:02:55" (3/4) ... [2024-11-09 06:02:55,858 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-09 06:02:55,859 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-09 06:02:55,861 INFO L158 Benchmark]: Toolchain (without parser) took 1347.53ms. Allocated memory is still 140.5MB. Free memory was 104.2MB in the beginning and 57.4MB in the end (delta: 46.8MB). Peak memory consumption was 48.2MB. Max. memory is 16.1GB. [2024-11-09 06:02:55,861 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 140.5MB. Free memory was 108.0MB in the beginning and 107.9MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 06:02:55,862 INFO L158 Benchmark]: CACSL2BoogieTranslator took 309.65ms. Allocated memory is still 140.5MB. Free memory was 104.0MB in the beginning and 91.0MB in the end (delta: 13.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-11-09 06:02:55,862 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.54ms. Allocated memory is still 140.5MB. Free memory was 91.0MB in the beginning and 89.5MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 06:02:55,863 INFO L158 Benchmark]: Boogie Preprocessor took 31.47ms. Allocated memory is still 140.5MB. Free memory was 89.5MB in the beginning and 87.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 06:02:55,864 INFO L158 Benchmark]: RCFGBuilder took 410.75ms. Allocated memory is still 140.5MB. Free memory was 87.9MB in the beginning and 75.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-09 06:02:55,864 INFO L158 Benchmark]: TraceAbstraction took 550.48ms. Allocated memory is still 140.5MB. Free memory was 74.8MB in the beginning and 58.2MB in the end (delta: 16.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-09 06:02:55,865 INFO L158 Benchmark]: Witness Printer took 5.01ms. Allocated memory is still 140.5MB. Free memory was 57.9MB in the beginning and 57.4MB in the end (delta: 500.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 06:02:55,869 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 140.5MB. Free memory was 108.0MB in the beginning and 107.9MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 309.65ms. Allocated memory is still 140.5MB. Free memory was 104.0MB in the beginning and 91.0MB in the end (delta: 13.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.54ms. Allocated memory is still 140.5MB. Free memory was 91.0MB in the beginning and 89.5MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 31.47ms. Allocated memory is still 140.5MB. Free memory was 89.5MB in the beginning and 87.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 410.75ms. Allocated memory is still 140.5MB. Free memory was 87.9MB in the beginning and 75.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 550.48ms. Allocated memory is still 140.5MB. Free memory was 74.8MB in the beginning and 58.2MB in the end (delta: 16.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Witness Printer took 5.01ms. Allocated memory is still 140.5MB. Free memory was 57.9MB in the beginning and 57.4MB in the end (delta: 500.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 19]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of to_int at line 34, overapproximation of someBinaryDOUBLEComparisonOperation at line 28. Possible FailurePath: [L25] int r; [L26] double a, x, s; [L27] a = __VERIFIER_nondet_double() [L28] CALL assume_abort_if_not(a>=0 && a<=5) [L14] COND FALSE !(!cond) [L28] RET assume_abort_if_not(a>=0 && a<=5) [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [r=1] [L33] COND TRUE 1 VAL [r=1] [L34] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [\old(cond)=0] [L17] COND TRUE !(cond) VAL [\old(cond)=0] [L19] reach_error() VAL [\old(cond)=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-09 06:02:55,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje --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 644fedc149cdfea0c0b39babfd09647f4fb573c27a060d8d57a08553303664a9 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 06:02:58,278 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 06:02:58,387 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2024-11-09 06:02:58,394 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 06:02:58,394 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 06:02:58,428 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 06:02:58,430 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 06:02:58,430 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 06:02:58,431 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 06:02:58,431 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 06:02:58,431 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 06:02:58,432 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 06:02:58,432 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 06:02:58,432 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 06:02:58,433 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 06:02:58,433 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 06:02:58,434 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 06:02:58,434 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 06:02:58,434 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 06:02:58,435 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 06:02:58,435 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 06:02:58,436 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 06:02:58,436 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 06:02:58,436 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 06:02:58,436 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 06:02:58,437 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-09 06:02:58,437 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 06:02:58,437 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-09 06:02:58,438 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 06:02:58,438 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 06:02:58,438 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 06:02:58,439 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 06:02:58,439 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 06:02:58,439 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 06:02:58,440 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 06:02:58,440 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:02:58,441 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 06:02:58,441 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 06:02:58,441 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 06:02:58,441 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2024-11-09 06:02:58,442 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-09 06:02:58,446 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 06:02:58,446 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 06:02:58,446 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 644fedc149cdfea0c0b39babfd09647f4fb573c27a060d8d57a08553303664a9 [2024-11-09 06:02:58,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 06:02:58,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 06:02:58,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 06:02:58,834 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 06:02:58,834 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 06:02:58,836 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound5.c Unable to find full path for "g++" [2024-11-09 06:03:00,945 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 06:03:01,164 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 06:03:01,164 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound5.c [2024-11-09 06:03:01,171 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/data/7c498f194/08e338cbd3634f21a865e7cfda84dcaa/FLAGc6e3e3d88 [2024-11-09 06:03:01,185 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/data/7c498f194/08e338cbd3634f21a865e7cfda84dcaa [2024-11-09 06:03:01,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 06:03:01,189 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 06:03:01,191 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 06:03:01,191 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 06:03:01,197 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 06:03:01,197 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:03:01" (1/1) ... [2024-11-09 06:03:01,198 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@131eed97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:01, skipping insertion in model container [2024-11-09 06:03:01,199 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:03:01" (1/1) ... [2024-11-09 06:03:01,218 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 06:03:01,426 WARN L250 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_cf4ee060-9c05-44ee-bd92-a78423d5587f/sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound5.c[709,722] [2024-11-09 06:03:01,459 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:03:01,479 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 06:03:01,505 WARN L250 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_cf4ee060-9c05-44ee-bd92-a78423d5587f/sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound5.c[709,722] [2024-11-09 06:03:01,527 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:03:01,559 INFO L204 MainTranslator]: Completed translation [2024-11-09 06:03:01,559 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:01 WrapperNode [2024-11-09 06:03:01,560 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 06:03:01,575 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 06:03:01,575 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 06:03:01,576 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 06:03:01,591 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:01" (1/1) ... [2024-11-09 06:03:01,607 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:01" (1/1) ... [2024-11-09 06:03:01,632 INFO L138 Inliner]: procedures = 15, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 40 [2024-11-09 06:03:01,632 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 06:03:01,633 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 06:03:01,633 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 06:03:01,633 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 06:03:01,645 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:01" (1/1) ... [2024-11-09 06:03:01,645 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:01" (1/1) ... [2024-11-09 06:03:01,649 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:01" (1/1) ... [2024-11-09 06:03:01,650 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:01" (1/1) ... [2024-11-09 06:03:01,667 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:01" (1/1) ... [2024-11-09 06:03:01,674 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:01" (1/1) ... [2024-11-09 06:03:01,675 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:01" (1/1) ... [2024-11-09 06:03:01,681 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:01" (1/1) ... [2024-11-09 06:03:01,683 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 06:03:01,686 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 06:03:01,686 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 06:03:01,686 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 06:03:01,687 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:01" (1/1) ... [2024-11-09 06:03:01,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:03:01,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:03:01,722 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 06:03:01,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 06:03:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 06:03:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2024-11-09 06:03:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 06:03:01,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 06:03:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 06:03:01,759 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 06:03:01,843 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 06:03:01,845 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 06:03:03,780 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-09 06:03:03,781 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 06:03:03,794 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 06:03:03,794 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 06:03:03,795 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:03:03 BoogieIcfgContainer [2024-11-09 06:03:03,795 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 06:03:03,797 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 06:03:03,797 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 06:03:03,800 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 06:03:03,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:03:01" (1/3) ... [2024-11-09 06:03:03,802 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6680f34a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:03:03, skipping insertion in model container [2024-11-09 06:03:03,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:01" (2/3) ... [2024-11-09 06:03:03,802 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6680f34a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:03:03, skipping insertion in model container [2024-11-09 06:03:03,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:03:03" (3/3) ... [2024-11-09 06:03:03,804 INFO L112 eAbstractionObserver]: Analyzing ICFG freire2_valuebound5.c [2024-11-09 06:03:03,820 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 06:03:03,820 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 06:03:03,887 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:03:03,896 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;@13ccfdd2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:03:03,896 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 06:03:03,901 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 06:03:03,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 06:03:03,920 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:03:03,920 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:03:03,921 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:03:03,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:03:03,929 INFO L85 PathProgramCache]: Analyzing trace with hash -588510783, now seen corresponding path program 1 times [2024-11-09 06:03:03,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 06:03:03,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264388608] [2024-11-09 06:03:03,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:03,945 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 06:03:03,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 06:03:03,947 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 06:03:03,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-11-09 06:03:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:04,111 INFO L255 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-09 06:03:04,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:03:04,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:03:04,133 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:03:04,134 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 06:03:04,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264388608] [2024-11-09 06:03:04,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264388608] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:03:04,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:03:04,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:03:04,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066234155] [2024-11-09 06:03:04,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:03:04,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 06:03:04,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 06:03:04,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 06:03:04,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 06:03:04,176 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:03:04,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:03:04,201 INFO L93 Difference]: Finished difference Result 41 states and 64 transitions. [2024-11-09 06:03:04,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 06:03:04,207 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-09 06:03:04,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:03:04,215 INFO L225 Difference]: With dead ends: 41 [2024-11-09 06:03:04,215 INFO L226 Difference]: Without dead ends: 18 [2024-11-09 06:03:04,219 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 06:03:04,224 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:03:04,227 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:03:04,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-09 06:03:04,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-09 06:03:04,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 06:03:04,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2024-11-09 06:03:04,274 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 9 [2024-11-09 06:03:04,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:03:04,275 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2024-11-09 06:03:04,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:03:04,275 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2024-11-09 06:03:04,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 06:03:04,276 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:03:04,277 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:03:04,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-11-09 06:03:04,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 06:03:04,478 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:03:04,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:03:04,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1186496579, now seen corresponding path program 1 times [2024-11-09 06:03:04,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 06:03:04,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444434660] [2024-11-09 06:03:04,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:04,480 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 06:03:04,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 06:03:04,481 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 06:03:04,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-11-09 06:03:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 06:03:04,596 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 06:03:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 06:03:04,693 ERROR L246 FreeRefinementEngine]: Caught known exception: Invalid model [2024-11-09 06:03:04,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1729281499] [2024-11-09 06:03:04,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:04,693 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 06:03:04,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 06:03:04,698 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 06:03:04,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2024-11-09 06:03:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:04,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 06:03:04,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:03:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:03:05,142 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:03:05,143 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 06:03:05,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [444434660] [2024-11-09 06:03:05,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:03:05,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1729281499] [2024-11-09 06:03:05,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1729281499] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:03:05,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:03:05,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 06:03:05,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966278372] [2024-11-09 06:03:05,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:03:05,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 06:03:05,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 06:03:05,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 06:03:05,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:03:05,149 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:03:07,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:03:09,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:03:11,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:03:14,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:03:16,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:03:17,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:03:20,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:03:22,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:03:24,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:03:26,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.36s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:03:28,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:03:30,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:03:34,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:03:37,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:03:39,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:03:41,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:03:43,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:03:44,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:03:47,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:03:48,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:03:50,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.33s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:03:52,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:03:54,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:03:57,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:03:59,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:04:01,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:04:03,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.35s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:04:05,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:04:07,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:04:09,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:04:12,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:04:14,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:04:17,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:04:19,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:04:21,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:04:21,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:21,245 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2024-11-09 06:04:21,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:04:21,378 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-09 06:04:21,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:21,379 INFO L225 Difference]: With dead ends: 32 [2024-11-09 06:04:21,379 INFO L226 Difference]: Without dead ends: 30 [2024-11-09 06:04:21,380 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-09 06:04:21,381 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 7 mSolverCounterUnsat, 32 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 32 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:21,382 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 29 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 44 Invalid, 32 Unknown, 0 Unchecked, 76.0s Time] [2024-11-09 06:04:21,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-09 06:04:21,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2024-11-09 06:04:21,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-09 06:04:21,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2024-11-09 06:04:21,401 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 9 [2024-11-09 06:04:21,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:21,401 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2024-11-09 06:04:21,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:04:21,401 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2024-11-09 06:04:21,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-09 06:04:21,402 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:21,402 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:04:21,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2024-11-09 06:04:21,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2024-11-09 06:04:21,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 06:04:21,804 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:04:21,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:21,804 INFO L85 PathProgramCache]: Analyzing trace with hash 514772834, now seen corresponding path program 1 times [2024-11-09 06:04:21,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 06:04:21,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982283691] [2024-11-09 06:04:21,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:21,805 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 06:04:21,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 06:04:21,807 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 06:04:21,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-11-09 06:04:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 06:04:22,121 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 06:04:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 06:04:22,408 ERROR L246 FreeRefinementEngine]: Caught known exception: Invalid model [2024-11-09 06:04:22,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1959433132] [2024-11-09 06:04:22,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:22,409 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 06:04:22,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 06:04:22,410 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 06:04:22,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2024-11-09 06:04:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:23,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 06:04:23,040 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:04:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:04:25,780 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:04:32,202 WARN L851 $PredicateComparison]: unable to prove that (= (_ bv1 32) (bvadd (bvneg (bvmul (bvmul (_ bv6 32) |c_ULTIMATE.start_main_~r~0#1|) |c_ULTIMATE.start_main_~r~0#1|)) (bvmul (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (bvmul (_ bv3 32) |c_ULTIMATE.start_main_~r~0#1|) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~x~0#1|) (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~a~0#1|)))))) is different from false [2024-11-09 06:04:34,233 WARN L873 $PredicateComparison]: unable to prove that (= (_ bv1 32) (bvadd (bvneg (bvmul (bvmul (_ bv6 32) |c_ULTIMATE.start_main_~r~0#1|) |c_ULTIMATE.start_main_~r~0#1|)) (bvmul (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (bvmul (_ bv3 32) |c_ULTIMATE.start_main_~r~0#1|) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~x~0#1|) (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~a~0#1|)))))) is different from true [2024-11-09 06:05:02,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:02,070 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 06:05:02,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982283691] [2024-11-09 06:05:02,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:05:02,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1959433132] [2024-11-09 06:05:02,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1959433132] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 06:05:02,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:05:02,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2024-11-09 06:05:02,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508064771] [2024-11-09 06:05:02,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:05:02,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 06:05:02,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 06:05:02,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 06:05:02,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=99, Unknown=2, NotChecked=20, Total=156 [2024-11-09 06:05:02,073 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 06:05:04,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:05:08,162 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (let ((.cse0 (fp.mul c_currentRoundingMode .cse1 |c_ULTIMATE.start_main_~a~0#1|))) (and (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.sub c_currentRoundingMode .cse0 .cse0))) (= (_ bv1 32) (bvadd (bvneg (bvmul (bvmul (_ bv6 32) |c_ULTIMATE.start_main_~r~0#1|) |c_ULTIMATE.start_main_~r~0#1|)) (bvmul (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (bvmul (_ bv3 32) |c_ULTIMATE.start_main_~r~0#1|) ((_ fp.to_sbv 32) roundTowardZero (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse1 |c_ULTIMATE.start_main_~x~0#1|) .cse0))))))) is different from false [2024-11-09 06:05:13,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:05:15,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:05:17,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:05:19,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:05:21,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:05:23,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:05:25,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:05:27,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:05:29,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:05:31,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:05:33,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:05:35,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:05:37,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:05:39,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:05:42,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:05:44,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:05:46,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:05:48,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:05:50,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:05:52,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 06:05:52,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:52,376 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2024-11-09 06:05:52,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 06:05:52,484 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-09 06:05:52,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:52,486 INFO L225 Difference]: With dead ends: 34 [2024-11-09 06:05:52,486 INFO L226 Difference]: Without dead ends: 32 [2024-11-09 06:05:52,487 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=41, Invalid=120, Unknown=3, NotChecked=46, Total=210 [2024-11-09 06:05:52,488 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 46.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:52,489 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 79 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 18 Unknown, 52 Unchecked, 46.8s Time] [2024-11-09 06:05:52,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-09 06:05:52,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-09 06:05:52,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-09 06:05:52,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2024-11-09 06:05:52,503 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 14 [2024-11-09 06:05:52,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:52,504 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2024-11-09 06:05:52,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 06:05:52,504 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2024-11-09 06:05:52,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 06:05:52,505 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:52,505 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:05:52,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2024-11-09 06:05:52,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-11-09 06:05:52,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 06:05:52,910 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:05:52,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:52,910 INFO L85 PathProgramCache]: Analyzing trace with hash -732613789, now seen corresponding path program 1 times [2024-11-09 06:05:52,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 06:05:52,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082824080] [2024-11-09 06:05:52,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:52,911 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 06:05:52,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 06:05:52,914 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 06:05:52,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-11-09 06:06:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 06:06:11,504 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 06:06:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 06:06:22,641 ERROR L246 FreeRefinementEngine]: Caught known exception: Invalid model [2024-11-09 06:06:22,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [864529153] [2024-11-09 06:06:22,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:06:22,642 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 06:06:22,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 06:06:22,643 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 06:06:22,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf4ee060-9c05-44ee-bd92-a78423d5587f/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2024-11-09 06:06:59,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 06:06:59,443 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 06:07:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat