./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1250.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1250.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b1947c2cfa9d661d99206b001fd8998d6aae9b547d6aa58efd3f1b0fdfd07645 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:36:33,674 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:36:33,815 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:36:33,827 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:36:33,828 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:36:33,876 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:36:33,877 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:36:33,877 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:36:33,878 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:36:33,883 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:36:33,884 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:36:33,885 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:36:33,885 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:36:33,887 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:36:33,887 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:36:33,888 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:36:33,888 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:36:33,889 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:36:33,889 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:36:33,890 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:36:33,890 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:36:33,891 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:36:33,892 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:36:33,892 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:36:33,893 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:36:33,893 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:36:33,893 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:36:33,894 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:36:33,894 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:36:33,895 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:36:33,896 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:36:33,896 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:36:33,897 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:36:33,897 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:36:33,897 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:36:33,897 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:36:33,898 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:36:33,899 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:33,899 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:36:33,899 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:36:33,899 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:36:33,900 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:36:33,900 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:36:33,900 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:36:33,901 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:36:33,901 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:36:33,901 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:36:33,902 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_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1947c2cfa9d661d99206b001fd8998d6aae9b547d6aa58efd3f1b0fdfd07645 [2023-11-23 20:36:34,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:36:34,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:36:34,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:36:34,278 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:36:34,279 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:36:34,280 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/float-newlib/float_req_bl_1250.c [2023-11-23 20:36:37,285 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:36:37,589 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:36:37,592 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/sv-benchmarks/c/float-newlib/float_req_bl_1250.c [2023-11-23 20:36:37,601 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/data/12c3965d8/ebee1707627c40b89d30bd676be65a29/FLAG5b64506d5 [2023-11-23 20:36:37,619 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/data/12c3965d8/ebee1707627c40b89d30bd676be65a29 [2023-11-23 20:36:37,621 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:36:37,623 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:36:37,624 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:37,625 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:36:37,630 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:36:37,631 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:37" (1/1) ... [2023-11-23 20:36:37,632 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65c7c414 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:37, skipping insertion in model container [2023-11-23 20:36:37,633 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:37" (1/1) ... [2023-11-23 20:36:37,662 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:36:37,864 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/sv-benchmarks/c/float-newlib/float_req_bl_1250.c[1719,1732] [2023-11-23 20:36:37,869 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:37,880 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:36:37,900 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/sv-benchmarks/c/float-newlib/float_req_bl_1250.c[1719,1732] [2023-11-23 20:36:37,901 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:37,916 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:36:37,917 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:37 WrapperNode [2023-11-23 20:36:37,917 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:37,918 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:37,918 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:36:37,918 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:36:37,926 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:37" (1/1) ... [2023-11-23 20:36:37,933 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:37" (1/1) ... [2023-11-23 20:36:37,954 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 45 [2023-11-23 20:36:37,956 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:37,957 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:36:37,957 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:36:37,958 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:36:37,967 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:37" (1/1) ... [2023-11-23 20:36:37,967 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:37" (1/1) ... [2023-11-23 20:36:37,970 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:37" (1/1) ... [2023-11-23 20:36:37,970 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:37" (1/1) ... [2023-11-23 20:36:37,977 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:37" (1/1) ... [2023-11-23 20:36:37,980 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:37" (1/1) ... [2023-11-23 20:36:37,982 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:37" (1/1) ... [2023-11-23 20:36:37,983 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:37" (1/1) ... [2023-11-23 20:36:37,986 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:36:37,987 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:36:37,987 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:36:37,987 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:36:37,988 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:37" (1/1) ... [2023-11-23 20:36:37,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:38,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:38,027 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:36:38,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:36:38,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:36:38,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:36:38,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:36:38,063 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2023-11-23 20:36:38,063 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2023-11-23 20:36:38,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2023-11-23 20:36:38,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:36:38,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:36:38,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:36:38,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:36:38,133 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:36:38,134 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:36:38,323 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:36:38,443 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:36:38,444 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 20:36:38,445 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:38 BoogieIcfgContainer [2023-11-23 20:36:38,446 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:36:38,448 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:36:38,449 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:36:38,452 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:36:38,453 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:36:37" (1/3) ... [2023-11-23 20:36:38,454 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68731e42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:36:38, skipping insertion in model container [2023-11-23 20:36:38,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:37" (2/3) ... [2023-11-23 20:36:38,454 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68731e42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:36:38, skipping insertion in model container [2023-11-23 20:36:38,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:38" (3/3) ... [2023-11-23 20:36:38,456 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1250.c [2023-11-23 20:36:38,473 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:36:38,473 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:36:38,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:36:38,525 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@9f98b57, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:36:38,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:36:38,530 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:36:38,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 20:36:38,538 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:38,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:38,539 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:38,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:38,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1573297800, now seen corresponding path program 1 times [2023-11-23 20:36:38,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:38,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331631918] [2023-11-23 20:36:38,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:38,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:38,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:38,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331631918] [2023-11-23 20:36:38,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331631918] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:38,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:38,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:36:38,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24641743] [2023-11-23 20:36:38,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:38,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 20:36:38,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:38,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 20:36:38,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 20:36:38,819 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:36:38,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:38,872 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2023-11-23 20:36:38,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 20:36:38,876 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-23 20:36:38,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:38,884 INFO L225 Difference]: With dead ends: 32 [2023-11-23 20:36:38,884 INFO L226 Difference]: Without dead ends: 15 [2023-11-23 20:36:38,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 20:36:38,894 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:38,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:36:38,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-23 20:36:38,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-23 20:36:38,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:36:38,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-11-23 20:36:38,942 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2023-11-23 20:36:38,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:38,943 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-11-23 20:36:38,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:36:38,944 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-11-23 20:36:38,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 20:36:38,945 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:38,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:38,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:36:38,946 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:38,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:38,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1576215946, now seen corresponding path program 1 times [2023-11-23 20:36:38,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:38,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140241418] [2023-11-23 20:36:38,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:38,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 20:36:39,003 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 20:36:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 20:36:39,109 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-23 20:36:39,109 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 20:36:39,111 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-23 20:36:39,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:36:39,116 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-23 20:36:39,120 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 20:36:39,133 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret5 could not be translated [2023-11-23 20:36:39,143 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 08:36:39 BoogieIcfgContainer [2023-11-23 20:36:39,143 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 20:36:39,144 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 20:36:39,144 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 20:36:39,144 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 20:36:39,145 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:38" (3/4) ... [2023-11-23 20:36:39,147 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-23 20:36:39,148 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 20:36:39,149 INFO L158 Benchmark]: Toolchain (without parser) took 1525.97ms. Allocated memory is still 136.3MB. Free memory was 103.4MB in the beginning and 94.8MB in the end (delta: 8.6MB). Peak memory consumption was 10.3MB. Max. memory is 16.1GB. [2023-11-23 20:36:39,149 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 113.2MB. Free memory is still 87.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 20:36:39,150 INFO L158 Benchmark]: CACSL2BoogieTranslator took 292.64ms. Allocated memory is still 136.3MB. Free memory was 102.9MB in the beginning and 92.0MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-23 20:36:39,151 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.94ms. Allocated memory is still 136.3MB. Free memory was 92.0MB in the beginning and 90.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 20:36:39,151 INFO L158 Benchmark]: Boogie Preprocessor took 28.75ms. Allocated memory is still 136.3MB. Free memory was 90.3MB in the beginning and 89.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 20:36:39,152 INFO L158 Benchmark]: RCFGBuilder took 459.30ms. Allocated memory is still 136.3MB. Free memory was 89.1MB in the beginning and 71.1MB in the end (delta: 18.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-23 20:36:39,152 INFO L158 Benchmark]: TraceAbstraction took 694.74ms. Allocated memory is still 136.3MB. Free memory was 70.3MB in the beginning and 94.8MB in the end (delta: -24.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 20:36:39,153 INFO L158 Benchmark]: Witness Printer took 4.58ms. Allocated memory is still 136.3MB. Free memory is still 94.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 20:36:39,156 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 113.2MB. Free memory is still 87.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 292.64ms. Allocated memory is still 136.3MB. Free memory was 102.9MB in the beginning and 92.0MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.94ms. Allocated memory is still 136.3MB. Free memory was 92.0MB in the beginning and 90.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.75ms. Allocated memory is still 136.3MB. Free memory was 90.3MB in the beginning and 89.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 459.30ms. Allocated memory is still 136.3MB. Free memory was 89.1MB in the beginning and 71.1MB in the end (delta: 18.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 694.74ms. Allocated memory is still 136.3MB. Free memory was 70.3MB in the beginning and 94.8MB in the end (delta: -24.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.58ms. Allocated memory is still 136.3MB. Free memory is still 94.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret5 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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: 67]: 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 someBinaryFLOATComparisonOperation at line 56, overapproximation of someBinaryArithmeticFLOAToperation at line 62. Possible FailurePath: [L62] float x = 0.0f / 0.0f; [L63] float y = 0.0f / 0.0f; [L64] CALL, EXPR fmax_float(x, y) [L45] CALL, EXPR __fpclassify_float(x) VAL [\old(x)=4286578697] [L22] __uint32_t w; VAL [\old(x)=4286578697, x=4286578697] [L25] ieee_float_shape_type gf_u; [L26] EXPR gf_u.value = (x) [L27] EXPR gf_u.word [L27] EXPR (w) = gf_u.word [L24-L28] { ieee_float_shape_type gf_u; gf_u.value = (x); (w) = gf_u.word; } VAL [\old(x)=4286578697, w=4286578689, x=4286578697] [L30] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L32-L33] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L35-L36] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L38] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L41] return 0; [L45] RET, EXPR __fpclassify_float(x) VAL [\old(x)=4286578697, \old(y)=4286578696, x=4286578697, y=4286578696] [L45] COND TRUE __fpclassify_float(x) == 0 [L46] return y; VAL [\old(x)=4286578697, \old(y)=4286578696, \result=4286578696, x=4286578697, y=4286578696] [L64] RET, EXPR fmax_float(x, y) [L64] float res = fmax_float(x, y); [L66] CALL, EXPR isnan_float(res) [L56] return x != x; [L66] RET, EXPR isnan_float(res) [L66] COND TRUE !isnan_float(res) [L67] reach_error() VAL [res=4286578696, x=4286578697, y=4286578696] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 13 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5 IncrementalHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 13 mSDtfsCounter, 5 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 [2023-11-23 20:36:39,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, 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_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1250.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b1947c2cfa9d661d99206b001fd8998d6aae9b547d6aa58efd3f1b0fdfd07645 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:36:41,824 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:36:41,909 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-11-23 20:36:41,916 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:36:41,916 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:36:41,944 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:36:41,945 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:36:41,945 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:36:41,946 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:36:41,947 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:36:41,947 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:36:41,948 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:36:41,949 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:36:41,949 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:36:41,950 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:36:41,951 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:36:41,952 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:36:41,952 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:36:41,953 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:36:41,954 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:36:41,954 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:36:41,955 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:36:41,956 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:36:41,956 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:36:41,957 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 20:36:41,957 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-23 20:36:41,958 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-23 20:36:41,959 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:36:41,959 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:36:41,960 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:36:41,960 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:36:41,961 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 20:36:41,961 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:36:41,962 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:36:41,962 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:41,963 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:36:41,963 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:36:41,964 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:36:41,964 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-23 20:36:41,965 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-23 20:36:41,965 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:36:41,966 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:36:41,966 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:36:41,967 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:36:41,967 INFO L153 SettingsManager]: * Logic for external solver=AUFBV 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_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1947c2cfa9d661d99206b001fd8998d6aae9b547d6aa58efd3f1b0fdfd07645 [2023-11-23 20:36:42,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:36:42,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:36:42,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:36:42,355 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:36:42,356 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:36:42,357 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/float-newlib/float_req_bl_1250.c [2023-11-23 20:36:45,459 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:36:45,733 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:36:45,734 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/sv-benchmarks/c/float-newlib/float_req_bl_1250.c [2023-11-23 20:36:45,744 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/data/2038fe9d4/9927107faea6415581434b61d7bed96c/FLAGde45a1edc [2023-11-23 20:36:45,764 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/data/2038fe9d4/9927107faea6415581434b61d7bed96c [2023-11-23 20:36:45,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:36:45,769 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:36:45,773 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:45,774 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:36:45,779 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:36:45,780 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:45" (1/1) ... [2023-11-23 20:36:45,781 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7aac6422 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:45, skipping insertion in model container [2023-11-23 20:36:45,781 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:45" (1/1) ... [2023-11-23 20:36:45,809 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:36:46,017 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/sv-benchmarks/c/float-newlib/float_req_bl_1250.c[1719,1732] [2023-11-23 20:36:46,021 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:46,038 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:36:46,087 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/sv-benchmarks/c/float-newlib/float_req_bl_1250.c[1719,1732] [2023-11-23 20:36:46,088 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:46,106 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:36:46,107 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:46 WrapperNode [2023-11-23 20:36:46,107 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:46,108 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:46,108 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:36:46,109 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:36:46,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:46" (1/1) ... [2023-11-23 20:36:46,141 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:46" (1/1) ... [2023-11-23 20:36:46,167 INFO L138 Inliner]: procedures = 20, calls = 15, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 43 [2023-11-23 20:36:46,167 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:46,168 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:36:46,168 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:36:46,169 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:36:46,179 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:46" (1/1) ... [2023-11-23 20:36:46,179 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:46" (1/1) ... [2023-11-23 20:36:46,190 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:46" (1/1) ... [2023-11-23 20:36:46,190 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:46" (1/1) ... [2023-11-23 20:36:46,208 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:46" (1/1) ... [2023-11-23 20:36:46,212 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:46" (1/1) ... [2023-11-23 20:36:46,214 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:46" (1/1) ... [2023-11-23 20:36:46,215 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:46" (1/1) ... [2023-11-23 20:36:46,230 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:36:46,234 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:36:46,234 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:36:46,235 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:36:46,235 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:46" (1/1) ... [2023-11-23 20:36:46,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:46,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:46,286 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:36:46,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:36:46,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:36:46,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-23 20:36:46,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:36:46,331 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2023-11-23 20:36:46,331 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2023-11-23 20:36:46,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-23 20:36:46,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:36:46,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:36:46,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2023-11-23 20:36:46,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:36:46,456 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:36:46,458 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:36:46,769 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:36:46,810 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:36:46,810 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 20:36:46,810 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:46 BoogieIcfgContainer [2023-11-23 20:36:46,810 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:36:46,813 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:36:46,813 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:36:46,816 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:36:46,817 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:36:45" (1/3) ... [2023-11-23 20:36:46,818 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7390e008 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:36:46, skipping insertion in model container [2023-11-23 20:36:46,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:46" (2/3) ... [2023-11-23 20:36:46,818 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7390e008 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:36:46, skipping insertion in model container [2023-11-23 20:36:46,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:46" (3/3) ... [2023-11-23 20:36:46,820 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1250.c [2023-11-23 20:36:46,840 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:36:46,840 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:36:46,896 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:36:46,903 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@477b3071, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:36:46,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:36:46,908 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:36:46,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 20:36:46,916 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:46,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:46,917 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:46,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:46,922 INFO L85 PathProgramCache]: Analyzing trace with hash 2108866882, now seen corresponding path program 1 times [2023-11-23 20:36:46,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:36:46,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [759658242] [2023-11-23 20:36:46,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:46,936 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 [2023-11-23 20:36:46,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:36:46,939 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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) [2023-11-23 20:36:46,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 20:36:47,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:47,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 20:36:47,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:47,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:47,058 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:47,059 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:36:47,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [759658242] [2023-11-23 20:36:47,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [759658242] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:47,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:47,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:36:47,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173180937] [2023-11-23 20:36:47,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:47,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 20:36:47,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:36:47,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 20:36:47,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 20:36:47,116 INFO L87 Difference]: Start difference. First operand has 20 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:36:47,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:47,149 INFO L93 Difference]: Finished difference Result 38 states and 57 transitions. [2023-11-23 20:36:47,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 20:36:47,152 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-23 20:36:47,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:47,159 INFO L225 Difference]: With dead ends: 38 [2023-11-23 20:36:47,159 INFO L226 Difference]: Without dead ends: 18 [2023-11-23 20:36:47,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 20:36:47,167 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:47,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:36:47,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-23 20:36:47,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-23 20:36:47,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:36:47,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2023-11-23 20:36:47,236 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 11 [2023-11-23 20:36:47,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:47,237 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2023-11-23 20:36:47,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:36:47,238 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2023-11-23 20:36:47,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 20:36:47,240 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:47,240 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:47,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 20:36:47,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 20:36:47,441 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:47,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:47,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1853619590, now seen corresponding path program 1 times [2023-11-23 20:36:47,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:36:47,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302809144] [2023-11-23 20:36:47,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:47,447 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 [2023-11-23 20:36:47,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:36:47,449 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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) [2023-11-23 20:36:47,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 20:36:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:47,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:36:47,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:47,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:47,632 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:47,633 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:36:47,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302809144] [2023-11-23 20:36:47,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302809144] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:47,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:47,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:36:47,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046882663] [2023-11-23 20:36:47,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:47,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:47,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:36:47,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:47,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:47,643 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:36:47,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:47,685 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2023-11-23 20:36:47,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:36:47,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-23 20:36:47,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:47,689 INFO L225 Difference]: With dead ends: 25 [2023-11-23 20:36:47,690 INFO L226 Difference]: Without dead ends: 21 [2023-11-23 20:36:47,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:47,692 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:47,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:36:47,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-23 20:36:47,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-23 20:36:47,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 20:36:47,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2023-11-23 20:36:47,707 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 12 [2023-11-23 20:36:47,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:47,707 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2023-11-23 20:36:47,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:36:47,708 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2023-11-23 20:36:47,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 20:36:47,709 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:47,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:47,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 20:36:47,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 20:36:47,913 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:47,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:47,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1218730299, now seen corresponding path program 1 times [2023-11-23 20:36:47,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:36:47,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135378358] [2023-11-23 20:36:47,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:47,915 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 [2023-11-23 20:36:47,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:36:47,917 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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) [2023-11-23 20:36:47,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 (4)] Waiting until timeout for monitored process [2023-11-23 20:36:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:48,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:36:48,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:48,048 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:48,048 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:36:48,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135378358] [2023-11-23 20:36:48,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135378358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:48,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:48,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:36:48,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908400234] [2023-11-23 20:36:48,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:48,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:48,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:36:48,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:48,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:48,052 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:36:48,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:48,081 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2023-11-23 20:36:48,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:36:48,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-11-23 20:36:48,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:48,083 INFO L225 Difference]: With dead ends: 28 [2023-11-23 20:36:48,083 INFO L226 Difference]: Without dead ends: 24 [2023-11-23 20:36:48,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:48,085 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:48,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:36:48,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-23 20:36:48,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2023-11-23 20:36:48,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 20:36:48,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2023-11-23 20:36:48,093 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 13 [2023-11-23 20:36:48,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:48,094 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2023-11-23 20:36:48,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:36:48,094 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2023-11-23 20:36:48,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-23 20:36:48,095 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:48,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:48,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:48,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 20:36:48,299 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:48,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:48,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1577718378, now seen corresponding path program 1 times [2023-11-23 20:36:48,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:36:48,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784683089] [2023-11-23 20:36:48,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:48,302 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 [2023-11-23 20:36:48,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:36:48,303 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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) [2023-11-23 20:36:48,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 20:36:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:48,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:36:48,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:48,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:48,407 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:48,407 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:36:48,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784683089] [2023-11-23 20:36:48,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784683089] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:48,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:48,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:36:48,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450683586] [2023-11-23 20:36:48,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:48,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:48,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:36:48,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:48,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:48,411 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:36:48,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:48,439 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2023-11-23 20:36:48,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:36:48,441 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-23 20:36:48,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:48,442 INFO L225 Difference]: With dead ends: 28 [2023-11-23 20:36:48,442 INFO L226 Difference]: Without dead ends: 24 [2023-11-23 20:36:48,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:48,444 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:48,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:36:48,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-23 20:36:48,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2023-11-23 20:36:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 20:36:48,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2023-11-23 20:36:48,451 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 14 [2023-11-23 20:36:48,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:48,452 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2023-11-23 20:36:48,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:36:48,452 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2023-11-23 20:36:48,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 20:36:48,454 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:48,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:48,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 20:36:48,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 20:36:48,657 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:48,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:48,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1623328873, now seen corresponding path program 1 times [2023-11-23 20:36:48,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:36:48,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857473175] [2023-11-23 20:36:48,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:48,659 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 [2023-11-23 20:36:48,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:36:48,660 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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) [2023-11-23 20:36:48,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 (6)] Waiting until timeout for monitored process [2023-11-23 20:36:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:48,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:36:48,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:48,814 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:48,814 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:36:48,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857473175] [2023-11-23 20:36:48,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857473175] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:48,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:48,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:36:48,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363844313] [2023-11-23 20:36:48,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:48,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:48,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:36:48,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:48,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:48,818 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:36:48,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:48,846 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2023-11-23 20:36:48,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:36:48,847 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-23 20:36:48,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:48,849 INFO L225 Difference]: With dead ends: 28 [2023-11-23 20:36:48,849 INFO L226 Difference]: Without dead ends: 24 [2023-11-23 20:36:48,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:48,850 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:48,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:36:48,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-23 20:36:48,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2023-11-23 20:36:48,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 20:36:48,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2023-11-23 20:36:48,862 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 15 [2023-11-23 20:36:48,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:48,863 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2023-11-23 20:36:48,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:36:48,863 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2023-11-23 20:36:48,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 20:36:48,864 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:48,864 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:48,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 (6)] Ended with exit code 0 [2023-11-23 20:36:49,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 20:36:49,073 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:49,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:49,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1784134742, now seen corresponding path program 1 times [2023-11-23 20:36:49,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:36:49,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605154963] [2023-11-23 20:36:49,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:49,074 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 [2023-11-23 20:36:49,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:36:49,076 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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) [2023-11-23 20:36:49,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 20:36:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:49,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 20:36:49,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:49,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:49,279 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:49,279 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:36:49,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605154963] [2023-11-23 20:36:49,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605154963] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:49,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:49,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:36:49,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929941418] [2023-11-23 20:36:49,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:49,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:36:49,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:36:49,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:36:49,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:36:49,282 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:36:49,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:49,400 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2023-11-23 20:36:49,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:36:49,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-23 20:36:49,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:49,402 INFO L225 Difference]: With dead ends: 25 [2023-11-23 20:36:49,402 INFO L226 Difference]: Without dead ends: 21 [2023-11-23 20:36:49,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:36:49,403 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 5 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:49,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 74 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:36:49,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-23 20:36:49,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2023-11-23 20:36:49,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:36:49,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-11-23 20:36:49,408 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2023-11-23 20:36:49,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:49,409 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-11-23 20:36:49,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:36:49,409 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-11-23 20:36:49,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 20:36:49,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:49,410 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:49,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:49,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 20:36:49,622 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:49,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:49,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1066713348, now seen corresponding path program 1 times [2023-11-23 20:36:49,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:36:49,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321221437] [2023-11-23 20:36:49,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:49,623 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 [2023-11-23 20:36:49,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:36:49,624 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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) [2023-11-23 20:36:49,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 (8)] Waiting until timeout for monitored process [2023-11-23 20:36:49,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:49,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:36:49,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:36:49,729 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:49,729 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:36:49,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321221437] [2023-11-23 20:36:49,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [321221437] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:49,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:49,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:36:49,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112501734] [2023-11-23 20:36:49,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:49,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:49,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:36:49,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:49,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:49,732 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:36:49,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:49,754 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-11-23 20:36:49,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:36:49,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-11-23 20:36:49,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:49,756 INFO L225 Difference]: With dead ends: 25 [2023-11-23 20:36:49,756 INFO L226 Difference]: Without dead ends: 20 [2023-11-23 20:36:49,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:49,757 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:49,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:36:49,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-23 20:36:49,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-23 20:36:49,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 20:36:49,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-11-23 20:36:49,762 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 20 [2023-11-23 20:36:49,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:49,762 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-11-23 20:36:49,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:36:49,763 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-11-23 20:36:49,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 20:36:49,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:49,764 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:49,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 (8)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:49,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 20:36:49,973 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:49,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:49,974 INFO L85 PathProgramCache]: Analyzing trace with hash 96206335, now seen corresponding path program 1 times [2023-11-23 20:36:49,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:36:49,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020968182] [2023-11-23 20:36:49,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:49,975 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 [2023-11-23 20:36:49,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:36:49,976 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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) [2023-11-23 20:36:49,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 (9)] Waiting until timeout for monitored process [2023-11-23 20:36:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:50,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:36:50,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:36:50,073 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:50,073 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:36:50,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1020968182] [2023-11-23 20:36:50,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1020968182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:50,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:50,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:36:50,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438234023] [2023-11-23 20:36:50,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:50,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:50,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:36:50,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:50,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:50,076 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:36:50,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:50,098 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2023-11-23 20:36:50,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:36:50,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-11-23 20:36:50,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:50,100 INFO L225 Difference]: With dead ends: 27 [2023-11-23 20:36:50,100 INFO L226 Difference]: Without dead ends: 22 [2023-11-23 20:36:50,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:50,101 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:50,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:36:50,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-23 20:36:50,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2023-11-23 20:36:50,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 20:36:50,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-11-23 20:36:50,107 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 21 [2023-11-23 20:36:50,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:50,107 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-11-23 20:36:50,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:36:50,108 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-11-23 20:36:50,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-23 20:36:50,109 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:50,109 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:50,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 (9)] Ended with exit code 0 [2023-11-23 20:36:50,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 20:36:50,312 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:50,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:50,313 INFO L85 PathProgramCache]: Analyzing trace with hash -669692568, now seen corresponding path program 1 times [2023-11-23 20:36:50,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:36:50,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155257411] [2023-11-23 20:36:50,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:50,314 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 [2023-11-23 20:36:50,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:36:50,315 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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) [2023-11-23 20:36:50,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 (10)] Waiting until timeout for monitored process [2023-11-23 20:36:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:50,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:36:50,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:50,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:36:50,436 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:50,437 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:36:50,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155257411] [2023-11-23 20:36:50,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155257411] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:50,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:50,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:36:50,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712804371] [2023-11-23 20:36:50,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:50,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:50,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:36:50,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:50,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:50,439 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:36:50,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:50,463 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2023-11-23 20:36:50,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:36:50,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-11-23 20:36:50,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:50,465 INFO L225 Difference]: With dead ends: 27 [2023-11-23 20:36:50,465 INFO L226 Difference]: Without dead ends: 22 [2023-11-23 20:36:50,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:50,467 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:50,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:36:50,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-23 20:36:50,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2023-11-23 20:36:50,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 20:36:50,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-11-23 20:36:50,472 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 22 [2023-11-23 20:36:50,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:50,472 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-11-23 20:36:50,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:36:50,473 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-11-23 20:36:50,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 20:36:50,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:50,474 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:50,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 (10)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:50,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 20:36:50,677 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:50,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:50,678 INFO L85 PathProgramCache]: Analyzing trace with hash 612292643, now seen corresponding path program 1 times [2023-11-23 20:36:50,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:36:50,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420137158] [2023-11-23 20:36:50,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:50,678 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 [2023-11-23 20:36:50,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:36:50,680 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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) [2023-11-23 20:36:50,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 (11)] Waiting until timeout for monitored process [2023-11-23 20:36:50,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:50,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:36:50,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:36:50,797 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:50,797 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:36:50,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420137158] [2023-11-23 20:36:50,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420137158] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:50,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:50,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:36:50,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565007727] [2023-11-23 20:36:50,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:50,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:50,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:36:50,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:50,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:50,800 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:36:50,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:50,822 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2023-11-23 20:36:50,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:36:50,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2023-11-23 20:36:50,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:50,824 INFO L225 Difference]: With dead ends: 27 [2023-11-23 20:36:50,824 INFO L226 Difference]: Without dead ends: 22 [2023-11-23 20:36:50,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:50,826 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:50,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:36:50,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-23 20:36:50,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2023-11-23 20:36:50,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 20:36:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-11-23 20:36:50,831 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2023-11-23 20:36:50,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:50,832 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-11-23 20:36:50,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:36:50,832 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-11-23 20:36:50,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 20:36:50,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:50,833 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:50,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 (11)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:51,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 20:36:51,037 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:51,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:51,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1499796324, now seen corresponding path program 1 times [2023-11-23 20:36:51,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:36:51,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62045262] [2023-11-23 20:36:51,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:51,039 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 [2023-11-23 20:36:51,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:36:51,040 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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) [2023-11-23 20:36:51,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 (12)] Waiting until timeout for monitored process [2023-11-23 20:36:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:51,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 20:36:51,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:51,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:36:51,242 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:51,242 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:36:51,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62045262] [2023-11-23 20:36:51,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62045262] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:51,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:51,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:36:51,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755084155] [2023-11-23 20:36:51,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:51,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:36:51,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:36:51,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:36:51,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:36:51,246 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:36:51,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:51,329 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2023-11-23 20:36:51,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:36:51,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2023-11-23 20:36:51,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:51,330 INFO L225 Difference]: With dead ends: 20 [2023-11-23 20:36:51,330 INFO L226 Difference]: Without dead ends: 0 [2023-11-23 20:36:51,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:36:51,331 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:51,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 65 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:36:51,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-23 20:36:51,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-23 20:36:51,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:51,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-23 20:36:51,332 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2023-11-23 20:36:51,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:51,332 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-23 20:36:51,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:36:51,333 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-23 20:36:51,333 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-23 20:36:51,335 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-23 20:36:51,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 (12)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:51,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 20:36:51,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-23 20:36:51,603 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-23 20:36:51,603 INFO L899 garLoopResultBuilder]: For program point fmax_float_returnLabel#1(lines 44 53) no Hoare annotation was computed. [2023-11-23 20:36:51,603 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-23 20:36:51,603 INFO L899 garLoopResultBuilder]: For program point main_returnLabel#1(lines 58 72) no Hoare annotation was computed. [2023-11-23 20:36:51,603 INFO L899 garLoopResultBuilder]: For program point L67(line 67) no Hoare annotation was computed. [2023-11-23 20:36:51,603 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 67) no Hoare annotation was computed. [2023-11-23 20:36:51,604 INFO L895 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (and (exists ((currentRoundingMode RoundingMode)) (= |ULTIMATE.start_fmax_float_~x#1| (fp.div currentRoundingMode (_ +zero 8 24) (_ +zero 8 24)))) (exists ((currentRoundingMode RoundingMode)) (= |ULTIMATE.start_fmax_float_~y#1| (fp.div currentRoundingMode (_ +zero 8 24) (_ +zero 8 24))))) [2023-11-23 20:36:51,604 INFO L899 garLoopResultBuilder]: For program point L49-1(lines 49 51) no Hoare annotation was computed. [2023-11-23 20:36:51,604 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (exists ((currentRoundingMode RoundingMode)) (= |ULTIMATE.start_fmax_float_~x#1| (fp.div currentRoundingMode (_ +zero 8 24) (_ +zero 8 24)))) (exists ((currentRoundingMode RoundingMode)) (= |ULTIMATE.start_fmax_float_~y#1| (fp.div currentRoundingMode (_ +zero 8 24) (_ +zero 8 24))))) [2023-11-23 20:36:51,604 INFO L899 garLoopResultBuilder]: For program point L45-1(lines 45 47) no Hoare annotation was computed. [2023-11-23 20:36:51,604 INFO L899 garLoopResultBuilder]: For program point L66(lines 66 69) no Hoare annotation was computed. [2023-11-23 20:36:51,604 INFO L899 garLoopResultBuilder]: For program point __fpclassify_floatFINAL(lines 21 42) no Hoare annotation was computed. [2023-11-23 20:36:51,605 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 21 42) the Hoare annotation is: true [2023-11-23 20:36:51,605 INFO L899 garLoopResultBuilder]: For program point L38(lines 38 41) no Hoare annotation was computed. [2023-11-23 20:36:51,605 INFO L899 garLoopResultBuilder]: For program point L32(lines 32 41) no Hoare annotation was computed. [2023-11-23 20:36:51,605 INFO L899 garLoopResultBuilder]: For program point L24-1(lines 24 28) no Hoare annotation was computed. [2023-11-23 20:36:51,605 INFO L902 garLoopResultBuilder]: At program point L24-2(lines 24 28) the Hoare annotation is: true [2023-11-23 20:36:51,605 INFO L899 garLoopResultBuilder]: For program point L24-3(lines 21 42) no Hoare annotation was computed. [2023-11-23 20:36:51,605 INFO L899 garLoopResultBuilder]: For program point __fpclassify_floatEXIT(lines 21 42) no Hoare annotation was computed. [2023-11-23 20:36:51,605 INFO L899 garLoopResultBuilder]: For program point L35(lines 35 41) no Hoare annotation was computed. [2023-11-23 20:36:51,609 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:51,611 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 20:36:51,618 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 08:36:51 BoogieIcfgContainer [2023-11-23 20:36:51,618 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 20:36:51,619 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 20:36:51,619 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 20:36:51,619 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 20:36:51,620 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:46" (3/4) ... [2023-11-23 20:36:51,622 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-23 20:36:51,626 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __fpclassify_float [2023-11-23 20:36:51,631 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2023-11-23 20:36:51,632 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2023-11-23 20:36:51,632 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-23 20:36:51,632 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-23 20:36:51,732 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/witness.graphml [2023-11-23 20:36:51,733 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/witness.yml [2023-11-23 20:36:51,733 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 20:36:51,734 INFO L158 Benchmark]: Toolchain (without parser) took 5965.20ms. Allocated memory was 81.8MB in the beginning and 117.4MB in the end (delta: 35.7MB). Free memory was 57.9MB in the beginning and 68.3MB in the end (delta: -10.3MB). Peak memory consumption was 26.1MB. Max. memory is 16.1GB. [2023-11-23 20:36:51,735 INFO L158 Benchmark]: CDTParser took 1.22ms. Allocated memory is still 81.8MB. Free memory was 57.6MB in the beginning and 57.5MB in the end (delta: 83.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 20:36:51,735 INFO L158 Benchmark]: CACSL2BoogieTranslator took 333.95ms. Allocated memory is still 81.8MB. Free memory was 57.7MB in the beginning and 46.2MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-23 20:36:51,735 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.10ms. Allocated memory is still 81.8MB. Free memory was 46.2MB in the beginning and 44.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 20:36:51,736 INFO L158 Benchmark]: Boogie Preprocessor took 65.27ms. Allocated memory is still 81.8MB. Free memory was 44.6MB in the beginning and 43.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 20:36:51,737 INFO L158 Benchmark]: RCFGBuilder took 576.41ms. Allocated memory is still 81.8MB. Free memory was 43.1MB in the beginning and 53.5MB in the end (delta: -10.4MB). Peak memory consumption was 9.9MB. Max. memory is 16.1GB. [2023-11-23 20:36:51,738 INFO L158 Benchmark]: TraceAbstraction took 4805.51ms. Allocated memory was 81.8MB in the beginning and 117.4MB in the end (delta: 35.7MB). Free memory was 52.9MB in the beginning and 72.5MB in the end (delta: -19.6MB). Peak memory consumption was 16.2MB. Max. memory is 16.1GB. [2023-11-23 20:36:51,738 INFO L158 Benchmark]: Witness Printer took 114.22ms. Allocated memory is still 117.4MB. Free memory was 72.5MB in the beginning and 68.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-23 20:36:51,743 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.22ms. Allocated memory is still 81.8MB. Free memory was 57.6MB in the beginning and 57.5MB in the end (delta: 83.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 333.95ms. Allocated memory is still 81.8MB. Free memory was 57.7MB in the beginning and 46.2MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.10ms. Allocated memory is still 81.8MB. Free memory was 46.2MB in the beginning and 44.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 65.27ms. Allocated memory is still 81.8MB. Free memory was 44.6MB in the beginning and 43.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 576.41ms. Allocated memory is still 81.8MB. Free memory was 43.1MB in the beginning and 53.5MB in the end (delta: -10.4MB). Peak memory consumption was 9.9MB. Max. memory is 16.1GB. * TraceAbstraction took 4805.51ms. Allocated memory was 81.8MB in the beginning and 117.4MB in the end (delta: 35.7MB). Free memory was 52.9MB in the beginning and 72.5MB in the end (delta: -19.6MB). Peak memory consumption was 16.2MB. Max. memory is 16.1GB. * Witness Printer took 114.22ms. Allocated memory is still 117.4MB. Free memory was 72.5MB in the beginning and 68.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. 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 - PositiveResult [Line: 67]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.7s, OverallIterations: 11, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7 mSDsluCounter, 648 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 406 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 126 IncrementalHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 242 mSDtfsCounter, 126 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 182 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=2, InterpolantAutomatonStates: 44, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 18 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 8 PreInvPairs, 11 NumberOfFragments, 32 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 189 NumberOfCodeBlocks, 189 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 178 ConstructedInterpolants, 8 QuantifiedInterpolants, 278 SizeOfPredicates, 14 NumberOfNonLiveVariables, 717 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 PerfectInterpolantSequences, 30/30 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2023-11-23 20:36:51,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_512bd734-82fa-4d71-b2f6-a3ce3b144eea/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE