./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --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 c7e459611ed6ff9d4c49aa04980ca7f1d5aaaf97e8fc0116c264955df4ed453a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:33:06,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:33:06,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:33:06,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:33:06,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:33:06,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:33:06,843 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:33:06,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:33:06,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:33:06,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:33:06,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:33:06,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:33:06,865 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:33:06,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:33:06,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:33:06,881 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:33:06,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:33:06,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:33:06,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:33:06,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:33:06,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:33:06,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:33:06,900 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:33:06,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:33:06,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:33:06,915 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:33:06,916 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:33:06,918 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:33:06,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:33:06,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:33:06,922 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:33:06,923 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:33:06,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:33:06,927 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:33:06,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:33:06,929 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:33:06,930 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:33:06,930 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:33:06,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:33:06,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:33:06,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:33:06,934 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:33:06,992 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:33:06,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:33:06,995 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:33:06,995 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:33:06,996 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:33:06,997 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:33:06,997 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:33:06,997 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:33:06,998 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:33:06,998 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:33:06,999 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:33:06,999 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:33:07,000 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:33:07,000 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:33:07,000 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:33:07,001 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:33:07,001 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:33:07,001 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:33:07,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:33:07,003 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:33:07,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:33:07,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:33:07,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:33:07,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:33:07,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:33:07,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:33:07,007 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:33:07,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:33:07,007 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:33:07,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:33:07,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:33:07,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:33:07,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:33:07,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:33:07,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:33:07,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:33:07,010 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:33:07,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:33:07,010 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:33:07,010 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:33:07,011 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:33:07,011 INFO L138 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_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7e459611ed6ff9d4c49aa04980ca7f1d5aaaf97e8fc0116c264955df4ed453a [2021-11-23 03:33:07,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:33:07,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:33:07,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:33:07,410 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:33:07,411 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:33:07,412 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c [2021-11-23 03:33:07,495 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/data/ebc6dcf5f/8179087e1b9f41868d4f55535cbd9ca5/FLAG1308e6067 [2021-11-23 03:33:08,036 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:33:08,036 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c [2021-11-23 03:33:08,046 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/data/ebc6dcf5f/8179087e1b9f41868d4f55535cbd9ca5/FLAG1308e6067 [2021-11-23 03:33:08,383 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/data/ebc6dcf5f/8179087e1b9f41868d4f55535cbd9ca5 [2021-11-23 03:33:08,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:33:08,387 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:33:08,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:33:08,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:33:08,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:33:08,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:33:08" (1/1) ... [2021-11-23 03:33:08,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28a6fcf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:08, skipping insertion in model container [2021-11-23 03:33:08,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:33:08" (1/1) ... [2021-11-23 03:33:08,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:33:08,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:33:08,642 WARN L230 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_854df117-5ca1-439a-af53-6b8798d3df42/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c[730,743] [2021-11-23 03:33:08,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:33:08,770 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:33:08,797 WARN L230 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_854df117-5ca1-439a-af53-6b8798d3df42/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c[730,743] [2021-11-23 03:33:08,862 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:33:08,876 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:33:08,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:08 WrapperNode [2021-11-23 03:33:08,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:33:08,878 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:33:08,878 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:33:08,879 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:33:08,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:08" (1/1) ... [2021-11-23 03:33:08,896 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:08" (1/1) ... [2021-11-23 03:33:08,917 INFO L137 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2021-11-23 03:33:08,918 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:33:08,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:33:08,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:33:08,919 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:33:08,929 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:08" (1/1) ... [2021-11-23 03:33:08,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:08" (1/1) ... [2021-11-23 03:33:08,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:08" (1/1) ... [2021-11-23 03:33:08,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:08" (1/1) ... [2021-11-23 03:33:08,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:08" (1/1) ... [2021-11-23 03:33:08,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:08" (1/1) ... [2021-11-23 03:33:08,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:08" (1/1) ... [2021-11-23 03:33:08,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:33:08,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:33:08,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:33:08,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:33:08,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:08" (1/1) ... [2021-11-23 03:33:08,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:33:08,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:33:09,001 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:33:09,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:33:09,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:33:09,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:33:09,056 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-23 03:33:09,056 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-23 03:33:09,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:33:09,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:33:09,057 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2021-11-23 03:33:09,057 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2021-11-23 03:33:09,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 03:33:09,057 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 03:33:09,142 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:33:09,144 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:33:09,440 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:33:09,524 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:33:09,525 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 03:33:09,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:33:09 BoogieIcfgContainer [2021-11-23 03:33:09,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:33:09,530 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:33:09,530 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:33:09,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:33:09,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:33:08" (1/3) ... [2021-11-23 03:33:09,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fbb39cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:33:09, skipping insertion in model container [2021-11-23 03:33:09,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:08" (2/3) ... [2021-11-23 03:33:09,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fbb39cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:33:09, skipping insertion in model container [2021-11-23 03:33:09,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:33:09" (3/3) ... [2021-11-23 03:33:09,538 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2021-11-23 03:33:09,553 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:33:09,553 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:33:09,632 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:33:09,639 INFO L339 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=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:33:09,639 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:33:09,662 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 32 states have internal predecessors, (45), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-23 03:33:09,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 03:33:09,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:09,670 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:09,671 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:09,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:09,679 INFO L85 PathProgramCache]: Analyzing trace with hash -769531522, now seen corresponding path program 1 times [2021-11-23 03:33:09,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:33:09,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457110442] [2021-11-23 03:33:09,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:09,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:33:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 03:33:10,230 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:33:10,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457110442] [2021-11-23 03:33:10,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457110442] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:33:10,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:33:10,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-23 03:33:10,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012059009] [2021-11-23 03:33:10,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:33:10,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 03:33:10,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:33:10,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 03:33:10,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:33:10,296 INFO L87 Difference]: Start difference. First operand has 45 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 32 states have internal predecessors, (45), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 10 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:33:10,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:33:10,598 INFO L93 Difference]: Finished difference Result 112 states and 171 transitions. [2021-11-23 03:33:10,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:33:10,602 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-11-23 03:33:10,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:33:10,617 INFO L225 Difference]: With dead ends: 112 [2021-11-23 03:33:10,617 INFO L226 Difference]: Without dead ends: 63 [2021-11-23 03:33:10,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:33:10,626 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 16 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:33:10,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 383 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:33:10,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-23 03:33:10,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2021-11-23 03:33:10,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 39 states have internal predecessors, (48), 12 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2021-11-23 03:33:10,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 75 transitions. [2021-11-23 03:33:10,686 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 75 transitions. Word has length 26 [2021-11-23 03:33:10,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:33:10,687 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 75 transitions. [2021-11-23 03:33:10,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:33:10,688 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 75 transitions. [2021-11-23 03:33:10,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 03:33:10,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:10,691 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:10,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:33:10,691 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:10,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:10,692 INFO L85 PathProgramCache]: Analyzing trace with hash 498972275, now seen corresponding path program 1 times [2021-11-23 03:33:10,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:33:10,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79653951] [2021-11-23 03:33:10,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:10,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:33:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:10,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 03:33:10,857 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:33:10,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79653951] [2021-11-23 03:33:10,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79653951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:33:10,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953599842] [2021-11-23 03:33:10,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:10,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:33:10,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:33:10,861 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:33:10,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:33:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:10,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 03:33:10,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:33:11,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:33:11,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:33:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 03:33:11,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953599842] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:33:11,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [309865235] [2021-11-23 03:33:11,614 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-23 03:33:11,614 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:33:11,620 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:33:11,627 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:33:11,627 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:33:12,402 INFO L197 IcfgInterpreter]: Interpreting procedure addflt with input of size 17 for LOIs [2021-11-23 03:33:13,940 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 66 for LOIs [2021-11-23 03:33:15,418 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 60 for LOIs [2021-11-23 03:33:15,582 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:33:30,925 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '488#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (exists ((aux_div_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53 Int) (aux_div_v_addflt_~b_BEFORE_CALL_1_42 Int) (aux_mod_v_addflt_~a_BEFORE_CALL_1_42 Int) (aux_div_v_addflt_~a_BEFORE_CALL_1_42 Int) (aux_mod_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53 Int)) (and (<= 0 aux_mod_v_addflt_~a_BEFORE_CALL_1_42) (<= 0 (+ aux_mod_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53 (* 4294967296 aux_div_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53))) (or (and (= (+ (* 4294967296 aux_div_v_addflt_~a_BEFORE_CALL_1_42) aux_mod_v_addflt_~a_BEFORE_CALL_1_42) 0) (= |#NULL.offset| 0) (= |#NULL.base| 0)) (and (= |#NULL.offset| 0) (= |#NULL.base| 0))) (= |__VERIFIER_assert_#in~cond| (ite (<= (ite (<= (mod (div (+ (* aux_div_v_addflt_~b_BEFORE_CALL_1_42 4294967296) aux_mod_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53 (* aux_div_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53 4294967296)) 16777216) 4294967296) 2147483647) (mod (div (+ (* aux_div_v_addflt_~b_BEFORE_CALL_1_42 4294967296) aux_mod_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53 (* aux_div_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53 4294967296)) 16777216) 4294967296) (+ (mod (div (+ (* aux_div_v_addflt_~b_BEFORE_CALL_1_42 4294967296) aux_mod_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53 (* aux_div_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53 4294967296)) 16777216) 4294967296) (- 4294967296))) (ite (<= (mod (div (+ aux_mod_v_addflt_~a_BEFORE_CALL_1_42 (* aux_div_v_addflt_~a_BEFORE_CALL_1_42 4294967296)) 16777216) 4294967296) 2147483647) (mod (div (+ aux_mod_v_addflt_~a_BEFORE_CALL_1_42 (* aux_div_v_addflt_~a_BEFORE_CALL_1_42 4294967296)) 16777216) 4294967296) (+ (mod (div (+ aux_mod_v_addflt_~a_BEFORE_CALL_1_42 (* aux_div_v_addflt_~a_BEFORE_CALL_1_42 4294967296)) 16777216) 4294967296) (- 4294967296)))) 1 0)) (< (+ aux_mod_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53 (* 4294967296 aux_div_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53)) 4294967296) (<= aux_mod_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53 aux_mod_v_addflt_~a_BEFORE_CALL_1_42) (< aux_mod_v_addflt_~a_BEFORE_CALL_1_42 4294967296) (not (= (+ aux_mod_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53 (* 4294967296 aux_div_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53)) 0)) (<= 0 aux_mod_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53) (< aux_mod_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53 4294967296))) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 03:33:30,925 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:33:30,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:33:30,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 15 [2021-11-23 03:33:30,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896957638] [2021-11-23 03:33:30,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:33:30,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:33:30,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:33:30,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:33:30,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1001, Unknown=2, NotChecked=0, Total=1122 [2021-11-23 03:33:30,931 INFO L87 Difference]: Start difference. First operand 55 states and 75 transitions. Second operand has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 03:33:31,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:33:31,349 INFO L93 Difference]: Finished difference Result 138 states and 191 transitions. [2021-11-23 03:33:31,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 03:33:31,350 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2021-11-23 03:33:31,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:33:31,354 INFO L225 Difference]: With dead ends: 138 [2021-11-23 03:33:31,354 INFO L226 Difference]: Without dead ends: 85 [2021-11-23 03:33:31,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=169, Invalid=1469, Unknown=2, NotChecked=0, Total=1640 [2021-11-23 03:33:31,359 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 31 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:33:31,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 425 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:33:31,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-23 03:33:31,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 69. [2021-11-23 03:33:31,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (18), 12 states have call predecessors, (18), 12 states have call successors, (18) [2021-11-23 03:33:31,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 89 transitions. [2021-11-23 03:33:31,381 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 89 transitions. Word has length 30 [2021-11-23 03:33:31,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:33:31,382 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 89 transitions. [2021-11-23 03:33:31,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 03:33:31,382 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 89 transitions. [2021-11-23 03:33:31,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 03:33:31,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:31,385 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:31,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:33:31,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:33:31,602 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:31,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:31,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1785742131, now seen corresponding path program 2 times [2021-11-23 03:33:31,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:33:31,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435999592] [2021-11-23 03:33:31,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:31,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:33:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:31,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 03:33:31,736 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:33:31,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435999592] [2021-11-23 03:33:31,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435999592] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:33:31,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:33:31,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 03:33:31,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150556904] [2021-11-23 03:33:31,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:33:31,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:33:31,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:33:31,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:33:31,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:33:31,742 INFO L87 Difference]: Start difference. First operand 69 states and 89 transitions. Second operand has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 03:33:31,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:33:31,856 INFO L93 Difference]: Finished difference Result 102 states and 131 transitions. [2021-11-23 03:33:31,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:33:31,857 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2021-11-23 03:33:31,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:33:31,868 INFO L225 Difference]: With dead ends: 102 [2021-11-23 03:33:31,869 INFO L226 Difference]: Without dead ends: 79 [2021-11-23 03:33:31,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:33:31,875 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 8 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:33:31,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 356 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:33:31,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-23 03:33:31,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-11-23 03:33:31,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (18), 12 states have call predecessors, (18), 12 states have call successors, (18) [2021-11-23 03:33:31,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 89 transitions. [2021-11-23 03:33:31,912 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 89 transitions. Word has length 30 [2021-11-23 03:33:31,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:33:31,913 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 89 transitions. [2021-11-23 03:33:31,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 03:33:31,914 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 89 transitions. [2021-11-23 03:33:31,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 03:33:31,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:31,920 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:31,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:33:31,921 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:31,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:31,922 INFO L85 PathProgramCache]: Analyzing trace with hash 965646607, now seen corresponding path program 1 times [2021-11-23 03:33:31,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:33:31,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983138157] [2021-11-23 03:33:31,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:31,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:33:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:32,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 03:33:32,477 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:33:32,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983138157] [2021-11-23 03:33:32,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983138157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:33:32,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:33:32,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-23 03:33:32,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164690276] [2021-11-23 03:33:32,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:33:32,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 03:33:32,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:33:32,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 03:33:32,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:33:32,480 INFO L87 Difference]: Start difference. First operand 69 states and 89 transitions. Second operand has 17 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 03:33:32,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:33:32,827 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2021-11-23 03:33:32,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 03:33:32,827 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 35 [2021-11-23 03:33:32,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:33:32,829 INFO L225 Difference]: With dead ends: 85 [2021-11-23 03:33:32,829 INFO L226 Difference]: Without dead ends: 65 [2021-11-23 03:33:32,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:33:32,832 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 22 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:33:32,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 525 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:33:32,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-23 03:33:32,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2021-11-23 03:33:32,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 41 states have internal predecessors, (50), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2021-11-23 03:33:32,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 75 transitions. [2021-11-23 03:33:32,853 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 75 transitions. Word has length 35 [2021-11-23 03:33:32,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:33:32,854 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 75 transitions. [2021-11-23 03:33:32,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 03:33:32,854 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 75 transitions. [2021-11-23 03:33:32,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 03:33:32,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:32,863 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:32,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:33:32,867 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:32,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:32,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1072313768, now seen corresponding path program 3 times [2021-11-23 03:33:32,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:33:32,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724950287] [2021-11-23 03:33:32,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:32,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:33:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:33:32,952 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 03:33:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:33:33,073 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 03:33:33,079 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 03:33:33,081 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 03:33:33,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:33:33,088 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2021-11-23 03:33:33,092 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:33:33,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:33:33 BoogieIcfgContainer [2021-11-23 03:33:33,160 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:33:33,161 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:33:33,161 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:33:33,161 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:33:33,162 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:33:09" (3/4) ... [2021-11-23 03:33:33,166 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-23 03:33:33,166 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:33:33,167 INFO L158 Benchmark]: Toolchain (without parser) took 24779.65ms. Allocated memory was 136.3MB in the beginning and 207.6MB in the end (delta: 71.3MB). Free memory was 97.4MB in the beginning and 114.8MB in the end (delta: -17.4MB). Peak memory consumption was 52.1MB. Max. memory is 16.1GB. [2021-11-23 03:33:33,169 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 136.3MB. Free memory was 109.6MB in the beginning and 109.6MB in the end (delta: 28.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:33:33,171 INFO L158 Benchmark]: CACSL2BoogieTranslator took 488.83ms. Allocated memory is still 136.3MB. Free memory was 97.1MB in the beginning and 106.9MB in the end (delta: -9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 03:33:33,175 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.66ms. Allocated memory is still 136.3MB. Free memory was 106.9MB in the beginning and 105.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:33:33,176 INFO L158 Benchmark]: Boogie Preprocessor took 45.76ms. Allocated memory is still 136.3MB. Free memory was 105.3MB in the beginning and 104.3MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:33:33,176 INFO L158 Benchmark]: RCFGBuilder took 562.70ms. Allocated memory is still 136.3MB. Free memory was 104.3MB in the beginning and 90.1MB in the end (delta: 14.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 03:33:33,177 INFO L158 Benchmark]: TraceAbstraction took 23630.28ms. Allocated memory was 136.3MB in the beginning and 207.6MB in the end (delta: 71.3MB). Free memory was 89.6MB in the beginning and 115.9MB in the end (delta: -26.3MB). Peak memory consumption was 46.6MB. Max. memory is 16.1GB. [2021-11-23 03:33:33,177 INFO L158 Benchmark]: Witness Printer took 4.97ms. Allocated memory is still 207.6MB. Free memory is still 114.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:33:33,180 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 136.3MB. Free memory was 109.6MB in the beginning and 109.6MB in the end (delta: 28.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 488.83ms. Allocated memory is still 136.3MB. Free memory was 97.1MB in the beginning and 106.9MB in the end (delta: -9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.66ms. Allocated memory is still 136.3MB. Free memory was 106.9MB in the beginning and 105.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.76ms. Allocated memory is still 136.3MB. Free memory was 105.3MB in the beginning and 104.3MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 562.70ms. Allocated memory is still 136.3MB. Free memory was 104.3MB in the beginning and 90.1MB in the end (delta: 14.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 23630.28ms. Allocated memory was 136.3MB in the beginning and 207.6MB in the end (delta: 71.3MB). Free memory was 89.6MB in the beginning and 115.9MB in the end (delta: -26.3MB). Peak memory consumption was 46.6MB. Max. memory is 16.1GB. * Witness Printer took 4.97ms. Allocated memory is still 207.6MB. Free memory is still 114.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 110, overapproximation of bitwiseAnd at line 108. Possible FailurePath: [L226] unsigned int a ; [L227] unsigned int ma = __VERIFIER_nondet_uint(); [L228] signed char ea = __VERIFIER_nondet_char(); [L229] unsigned int b ; [L230] unsigned int mb = __VERIFIER_nondet_uint(); [L231] signed char eb = __VERIFIER_nondet_char(); [L232] unsigned int r_add1 ; [L233] unsigned int r_add2 ; [L234] unsigned int zero ; [L235] int tmp ; [L236] int tmp___0 ; [L237] int __retres14 ; VAL [ea=0, eb=0] [L241] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L80] return (__retres4); [L241] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=0, eb=0] [L241] zero = base2flt(0, 0) [L242] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=0, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=0, \old(m)=16777216, __retres4=16777216, e=0, res=16777216] [L80] return (__retres4); [L242] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=-72057594021150720, ea=0, eb=0, ma=16777216, zero=0] [L242] a = base2flt(ma, ea) [L243] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=0, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=0, \old(m)=16777216, __retres4=1, e=0, res=1] [L80] return (__retres4); [L243] RET, EXPR base2flt(mb, eb) VAL [a=16777216, base2flt(mb, eb)=-108086395351859199, ea=0, eb=0, ma=16777216, mb=16777216, zero=0] [L243] b = base2flt(mb, eb) [L244] CALL addflt(a, b) VAL [\old(a)=16777216, \old(b)=1] [L84] unsigned int res ; [L85] unsigned int ma ; [L86] unsigned int mb ; [L87] unsigned int delta ; [L88] int ea ; [L89] int eb ; [L90] unsigned int tmp ; [L91] unsigned int __retres10 ; [L94] COND FALSE !(a < b) VAL [\old(a)=16777216, \old(b)=1, a=16777216, b=1, tmp=16777216] [L101] COND FALSE !(! b) [L108] ma = a & ((1U << 24U) - 1U) [L109] ea = (int )(a >> 24U) - 128 [L110] ma = ma | (1U << 24U) [L111] mb = b & ((1U << 24U) - 1U) [L112] eb = (int )(b >> 24U) - 128 [L113] mb = mb | (1U << 24U) VAL [\old(a)=16777216, \old(b)=1, a=16777216, b=1, ea=-127, eb=2147483264, tmp=16777216] [L114] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L17] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 23.5s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 100 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 77 mSDsluCounter, 1689 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1582 mSDsCounter, 31 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 667 IncrementalHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 31 mSolverCounterUnsat, 195 mSDtfsCounter, 667 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 16.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=2, InterpolantAutomatonStates: 52, 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, 4 MinimizatonAttempts, 42 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 185 NumberOfCodeBlocks, 185 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 175 ConstructedInterpolants, 0 QuantifiedInterpolants, 453 SizeOfPredicates, 8 NumberOfNonLiveVariables, 112 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 64/76 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 [2021-11-23 03:33:33,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --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 c7e459611ed6ff9d4c49aa04980ca7f1d5aaaf97e8fc0116c264955df4ed453a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:33:36,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:33:36,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:33:36,239 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:33:36,240 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:33:36,246 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:33:36,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:33:36,258 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:33:36,262 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:33:36,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:33:36,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:33:36,275 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:33:36,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:33:36,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:33:36,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:33:36,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:33:36,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:33:36,291 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:33:36,294 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:33:36,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:33:36,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:33:36,309 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:33:36,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:33:36,315 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:33:36,327 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:33:36,327 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:33:36,328 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:33:36,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:33:36,331 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:33:36,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:33:36,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:33:36,335 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:33:36,337 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:33:36,338 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:33:36,340 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:33:36,341 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:33:36,342 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:33:36,342 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:33:36,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:33:36,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:33:36,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:33:36,347 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 03:33:36,402 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:33:36,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:33:36,403 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:33:36,403 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:33:36,404 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:33:36,405 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:33:36,405 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:33:36,405 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:33:36,406 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:33:36,406 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:33:36,407 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:33:36,408 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:33:36,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:33:36,410 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:33:36,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:33:36,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:33:36,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:33:36,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:33:36,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:33:36,412 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 03:33:36,412 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 03:33:36,412 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 03:33:36,412 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:33:36,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:33:36,413 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:33:36,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:33:36,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:33:36,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 03:33:36,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:33:36,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:33:36,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:33:36,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:33:36,416 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:33:36,416 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 03:33:36,417 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 03:33:36,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:33:36,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:33:36,418 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:33:36,418 INFO L138 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_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7e459611ed6ff9d4c49aa04980ca7f1d5aaaf97e8fc0116c264955df4ed453a [2021-11-23 03:33:36,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:33:36,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:33:36,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:33:36,920 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:33:36,920 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:33:36,923 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c [2021-11-23 03:33:37,005 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/data/ea316d94f/f58f300928c146aebff929429af0299b/FLAG0ffd2c63a [2021-11-23 03:33:37,631 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:33:37,632 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c [2021-11-23 03:33:37,647 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/data/ea316d94f/f58f300928c146aebff929429af0299b/FLAG0ffd2c63a [2021-11-23 03:33:37,925 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/data/ea316d94f/f58f300928c146aebff929429af0299b [2021-11-23 03:33:37,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:33:37,931 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:33:37,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:33:37,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:33:37,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:33:37,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:33:37" (1/1) ... [2021-11-23 03:33:37,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cf7c710 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:37, skipping insertion in model container [2021-11-23 03:33:37,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:33:37" (1/1) ... [2021-11-23 03:33:37,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:33:38,014 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:33:38,228 WARN L230 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_854df117-5ca1-439a-af53-6b8798d3df42/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c[730,743] [2021-11-23 03:33:38,316 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:33:38,381 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:33:38,416 WARN L230 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_854df117-5ca1-439a-af53-6b8798d3df42/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c[730,743] [2021-11-23 03:33:38,472 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:33:38,487 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:33:38,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:38 WrapperNode [2021-11-23 03:33:38,487 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:33:38,489 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:33:38,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:33:38,489 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:33:38,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:38" (1/1) ... [2021-11-23 03:33:38,509 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:38" (1/1) ... [2021-11-23 03:33:38,534 INFO L137 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2021-11-23 03:33:38,534 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:33:38,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:33:38,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:33:38,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:33:38,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:38" (1/1) ... [2021-11-23 03:33:38,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:38" (1/1) ... [2021-11-23 03:33:38,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:38" (1/1) ... [2021-11-23 03:33:38,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:38" (1/1) ... [2021-11-23 03:33:38,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:38" (1/1) ... [2021-11-23 03:33:38,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:38" (1/1) ... [2021-11-23 03:33:38,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:38" (1/1) ... [2021-11-23 03:33:38,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:33:38,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:33:38,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:33:38,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:33:38,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:38" (1/1) ... [2021-11-23 03:33:38,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:33:38,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:33:38,668 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:33:38,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:33:38,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:33:38,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 03:33:38,734 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-23 03:33:38,734 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-23 03:33:38,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:33:38,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:33:38,735 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2021-11-23 03:33:38,735 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2021-11-23 03:33:38,735 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 03:33:38,735 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 03:33:38,869 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:33:38,875 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:33:39,240 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:33:39,258 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:33:39,262 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 03:33:39,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:33:39 BoogieIcfgContainer [2021-11-23 03:33:39,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:33:39,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:33:39,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:33:39,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:33:39,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:33:37" (1/3) ... [2021-11-23 03:33:39,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34c777cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:33:39, skipping insertion in model container [2021-11-23 03:33:39,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:38" (2/3) ... [2021-11-23 03:33:39,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34c777cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:33:39, skipping insertion in model container [2021-11-23 03:33:39,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:33:39" (3/3) ... [2021-11-23 03:33:39,284 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2021-11-23 03:33:39,291 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:33:39,292 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:33:39,357 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:33:39,365 INFO L339 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=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:33:39,366 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:33:39,387 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 40 states have (on average 1.475) internal successors, (59), 41 states have internal predecessors, (59), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-23 03:33:39,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 03:33:39,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:39,397 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:39,398 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:39,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:39,405 INFO L85 PathProgramCache]: Analyzing trace with hash 173410466, now seen corresponding path program 1 times [2021-11-23 03:33:39,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:33:39,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2119407683] [2021-11-23 03:33:39,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:39,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:33:39,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:33:39,425 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:33:39,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 03:33:39,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:39,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:33:39,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:33:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 03:33:39,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:33:40,094 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 03:33:40,096 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:33:40,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2119407683] [2021-11-23 03:33:40,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2119407683] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:33:40,097 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:33:40,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-11-23 03:33:40,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528591555] [2021-11-23 03:33:40,100 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:33:40,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:33:40,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:33:40,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:33:40,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:33:40,142 INFO L87 Difference]: Start difference. First operand has 54 states, 40 states have (on average 1.475) internal successors, (59), 41 states have internal predecessors, (59), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 03:33:40,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:33:40,336 INFO L93 Difference]: Finished difference Result 130 states and 196 transitions. [2021-11-23 03:33:40,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:33:40,342 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2021-11-23 03:33:40,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:33:40,358 INFO L225 Difference]: With dead ends: 130 [2021-11-23 03:33:40,358 INFO L226 Difference]: Without dead ends: 71 [2021-11-23 03:33:40,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:33:40,376 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 23 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:33:40,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 472 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:33:40,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-23 03:33:40,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2021-11-23 03:33:40,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 47 states have internal predecessors, (59), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-11-23 03:33:40,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2021-11-23 03:33:40,454 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 31 [2021-11-23 03:33:40,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:33:40,455 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2021-11-23 03:33:40,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 03:33:40,456 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2021-11-23 03:33:40,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 03:33:40,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:40,460 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:40,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 03:33:40,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:33:40,663 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:40,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:40,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1707598935, now seen corresponding path program 1 times [2021-11-23 03:33:40,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:33:40,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [645535354] [2021-11-23 03:33:40,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:40,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:33:40,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:33:40,671 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:33:40,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 03:33:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:40,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:33:40,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:33:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 03:33:40,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:33:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 03:33:41,131 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:33:41,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [645535354] [2021-11-23 03:33:41,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [645535354] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:33:41,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [248204002] [2021-11-23 03:33:41,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:41,133 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:33:41,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:33:41,158 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:33:41,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-23 03:33:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:41,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:33:41,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:33:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 03:33:41,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:33:41,590 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 03:33:41,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [248204002] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:33:41,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237051414] [2021-11-23 03:33:41,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:41,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:33:41,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:33:41,603 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:33:41,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:33:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:41,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:33:41,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:33:41,837 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 03:33:41,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:33:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 03:33:41,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237051414] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:33:41,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:33:41,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 9 [2021-11-23 03:33:41,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423867709] [2021-11-23 03:33:41,979 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:33:41,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:33:41,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:33:41,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:33:41,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:33:41,984 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:33:42,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:33:42,159 INFO L93 Difference]: Finished difference Result 121 states and 161 transitions. [2021-11-23 03:33:42,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:33:42,160 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-11-23 03:33:42,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:33:42,167 INFO L225 Difference]: With dead ends: 121 [2021-11-23 03:33:42,168 INFO L226 Difference]: Without dead ends: 93 [2021-11-23 03:33:42,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:33:42,173 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 26 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:33:42,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 508 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:33:42,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-23 03:33:42,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2021-11-23 03:33:42,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 54 states have internal predecessors, (67), 12 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2021-11-23 03:33:42,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2021-11-23 03:33:42,214 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 35 [2021-11-23 03:33:42,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:33:42,216 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2021-11-23 03:33:42,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:33:42,222 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2021-11-23 03:33:42,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 03:33:42,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:42,228 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:42,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:33:42,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:33:42,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:33:42,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:33:42,843 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:42,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:42,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1508244029, now seen corresponding path program 1 times [2021-11-23 03:33:42,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:33:42,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [427688451] [2021-11-23 03:33:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:42,845 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:33:42,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:33:42,850 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:33:42,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 03:33:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:42,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:33:42,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:33:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 03:33:43,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:33:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 03:33:43,238 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:33:43,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [427688451] [2021-11-23 03:33:43,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [427688451] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:33:43,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1477089657] [2021-11-23 03:33:43,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:43,239 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:33:43,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:33:43,242 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:33:43,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 03:33:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:43,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:33:43,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:33:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 03:33:43,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:33:43,558 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 03:33:43,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1477089657] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:33:43,559 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:33:43,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [8, 8] total 12 [2021-11-23 03:33:43,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796258360] [2021-11-23 03:33:43,559 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:33:43,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:33:43,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:33:43,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:33:43,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:33:43,561 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 03:33:43,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:33:43,696 INFO L93 Difference]: Finished difference Result 114 states and 150 transitions. [2021-11-23 03:33:43,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:33:43,698 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2021-11-23 03:33:43,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:33:43,700 INFO L225 Difference]: With dead ends: 114 [2021-11-23 03:33:43,702 INFO L226 Difference]: Without dead ends: 91 [2021-11-23 03:33:43,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:33:43,706 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 19 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:33:43,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 531 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:33:43,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-23 03:33:43,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2021-11-23 03:33:43,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 58 states have (on average 1.2758620689655173) internal successors, (74), 60 states have internal predecessors, (74), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2021-11-23 03:33:43,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2021-11-23 03:33:43,738 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 39 [2021-11-23 03:33:43,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:33:43,740 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2021-11-23 03:33:43,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 03:33:43,740 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2021-11-23 03:33:43,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 03:33:43,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:43,746 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:43,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-11-23 03:33:43,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-23 03:33:44,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:33:44,149 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:44,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:44,150 INFO L85 PathProgramCache]: Analyzing trace with hash -54729342, now seen corresponding path program 2 times [2021-11-23 03:33:44,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:33:44,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1504841423] [2021-11-23 03:33:44,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 03:33:44,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:33:44,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:33:44,156 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:33:44,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 03:33:44,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 03:33:44,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:33:44,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:33:44,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:33:44,479 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 03:33:44,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:33:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 03:33:44,662 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:33:44,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1504841423] [2021-11-23 03:33:44,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1504841423] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:33:44,663 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:33:44,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-23 03:33:44,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450662343] [2021-11-23 03:33:44,663 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:33:44,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 03:33:44,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:33:44,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 03:33:44,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:33:44,666 INFO L87 Difference]: Start difference. First operand 79 states and 103 transitions. Second operand has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 03:33:44,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:33:44,852 INFO L93 Difference]: Finished difference Result 109 states and 141 transitions. [2021-11-23 03:33:44,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:33:44,854 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2021-11-23 03:33:44,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:33:44,857 INFO L225 Difference]: With dead ends: 109 [2021-11-23 03:33:44,857 INFO L226 Difference]: Without dead ends: 107 [2021-11-23 03:33:44,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:33:44,859 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 27 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:33:44,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 442 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2021-11-23 03:33:44,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-23 03:33:44,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 83. [2021-11-23 03:33:44,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 63 states have internal predecessors, (77), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2021-11-23 03:33:44,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2021-11-23 03:33:44,898 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 39 [2021-11-23 03:33:44,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:33:44,901 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2021-11-23 03:33:44,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 03:33:44,902 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2021-11-23 03:33:44,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-23 03:33:44,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:44,909 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:44,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:33:45,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:33:45,123 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:45,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:45,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1136903568, now seen corresponding path program 1 times [2021-11-23 03:33:45,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:33:45,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316831783] [2021-11-23 03:33:45,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:45,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:33:45,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:33:45,126 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:33:45,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 03:33:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:45,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:33:45,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:33:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:33:45,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:33:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:33:45,502 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:33:45,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316831783] [2021-11-23 03:33:45,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [316831783] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:33:45,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1727956910] [2021-11-23 03:33:45,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:45,505 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:33:45,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:33:45,510 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:33:45,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 03:33:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:45,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:33:45,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:33:45,732 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:33:45,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:33:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:33:45,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1727956910] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:33:45,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816017235] [2021-11-23 03:33:45,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:45,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:33:45,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:33:45,921 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:33:45,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 03:33:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:45,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:33:45,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:33:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:33:46,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:33:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:33:46,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816017235] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:33:46,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:33:46,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 9 [2021-11-23 03:33:46,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324690921] [2021-11-23 03:33:46,261 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:33:46,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:33:46,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:33:46,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:33:46,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:33:46,264 INFO L87 Difference]: Start difference. First operand 83 states and 106 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 03:33:46,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:33:46,466 INFO L93 Difference]: Finished difference Result 129 states and 170 transitions. [2021-11-23 03:33:46,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:33:46,467 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2021-11-23 03:33:46,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:33:46,469 INFO L225 Difference]: With dead ends: 129 [2021-11-23 03:33:46,469 INFO L226 Difference]: Without dead ends: 118 [2021-11-23 03:33:46,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:33:46,471 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 64 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:33:46,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 421 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:33:46,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-23 03:33:46,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 97. [2021-11-23 03:33:46,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 74 states have internal predecessors, (87), 16 states have call successors, (16), 7 states have call predecessors, (16), 10 states have return successors, (22), 15 states have call predecessors, (22), 15 states have call successors, (22) [2021-11-23 03:33:46,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2021-11-23 03:33:46,497 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 44 [2021-11-23 03:33:46,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:33:46,498 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2021-11-23 03:33:46,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 03:33:46,499 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2021-11-23 03:33:46,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-23 03:33:46,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:46,501 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:46,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 03:33:46,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-23 03:33:46,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 03:33:47,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 03:33:47,119 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:47,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:47,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1837968146, now seen corresponding path program 1 times [2021-11-23 03:33:47,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:33:47,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1090118478] [2021-11-23 03:33:47,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:47,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:33:47,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:33:47,123 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:33:47,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 03:33:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:47,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 03:33:47,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:33:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:33:47,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:33:47,654 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:33:47,655 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:33:47,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1090118478] [2021-11-23 03:33:47,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1090118478] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:33:47,655 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:33:47,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 14 [2021-11-23 03:33:47,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894004791] [2021-11-23 03:33:47,656 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:33:47,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:33:47,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:33:47,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:33:47,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:33:47,658 INFO L87 Difference]: Start difference. First operand 97 states and 125 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 03:33:47,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:33:47,997 INFO L93 Difference]: Finished difference Result 133 states and 172 transitions. [2021-11-23 03:33:47,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:33:47,998 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2021-11-23 03:33:47,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:33:48,000 INFO L225 Difference]: With dead ends: 133 [2021-11-23 03:33:48,000 INFO L226 Difference]: Without dead ends: 126 [2021-11-23 03:33:48,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:33:48,002 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 35 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:33:48,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 661 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:33:48,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-23 03:33:48,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2021-11-23 03:33:48,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 75 states have internal predecessors, (89), 16 states have call successors, (16), 7 states have call predecessors, (16), 10 states have return successors, (22), 16 states have call predecessors, (22), 15 states have call successors, (22) [2021-11-23 03:33:48,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 127 transitions. [2021-11-23 03:33:48,022 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 127 transitions. Word has length 44 [2021-11-23 03:33:48,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:33:48,023 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 127 transitions. [2021-11-23 03:33:48,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 03:33:48,024 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 127 transitions. [2021-11-23 03:33:48,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 03:33:48,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:48,026 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:48,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 03:33:48,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:33:48,240 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:48,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:48,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1849173563, now seen corresponding path program 1 times [2021-11-23 03:33:48,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:33:48,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64987373] [2021-11-23 03:33:48,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:48,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:33:48,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:33:48,243 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:33:48,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 03:33:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:33:48,306 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 03:33:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:33:48,435 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-23 03:33:48,436 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 03:33:48,437 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 03:33:48,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 03:33:48,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:33:48,657 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2021-11-23 03:33:48,660 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:33:48,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:33:48 BoogieIcfgContainer [2021-11-23 03:33:48,713 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:33:48,714 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:33:48,714 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:33:48,714 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:33:48,715 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:33:39" (3/4) ... [2021-11-23 03:33:48,717 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-23 03:33:48,781 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 03:33:48,781 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:33:48,782 INFO L158 Benchmark]: Toolchain (without parser) took 10851.17ms. Allocated memory was 56.6MB in the beginning and 86.0MB in the end (delta: 29.4MB). Free memory was 34.1MB in the beginning and 58.7MB in the end (delta: -24.5MB). Peak memory consumption was 4.7MB. Max. memory is 16.1GB. [2021-11-23 03:33:48,784 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 56.6MB. Free memory was 37.7MB in the beginning and 37.6MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:33:48,784 INFO L158 Benchmark]: CACSL2BoogieTranslator took 553.28ms. Allocated memory was 56.6MB in the beginning and 71.3MB in the end (delta: 14.7MB). Free memory was 33.9MB in the beginning and 52.2MB in the end (delta: -18.3MB). Peak memory consumption was 12.0MB. Max. memory is 16.1GB. [2021-11-23 03:33:48,785 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.77ms. Allocated memory is still 71.3MB. Free memory was 52.2MB in the beginning and 50.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:33:48,785 INFO L158 Benchmark]: Boogie Preprocessor took 78.73ms. Allocated memory is still 71.3MB. Free memory was 50.8MB in the beginning and 49.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:33:48,786 INFO L158 Benchmark]: RCFGBuilder took 649.20ms. Allocated memory is still 71.3MB. Free memory was 49.3MB in the beginning and 37.2MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 03:33:48,786 INFO L158 Benchmark]: TraceAbstraction took 9445.41ms. Allocated memory was 71.3MB in the beginning and 86.0MB in the end (delta: 14.7MB). Free memory was 36.8MB in the beginning and 62.2MB in the end (delta: -25.4MB). Peak memory consumption was 22.1MB. Max. memory is 16.1GB. [2021-11-23 03:33:48,787 INFO L158 Benchmark]: Witness Printer took 67.28ms. Allocated memory is still 86.0MB. Free memory was 62.2MB in the beginning and 58.7MB in the end (delta: 3.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:33:48,790 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 56.6MB. Free memory was 37.7MB in the beginning and 37.6MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 553.28ms. Allocated memory was 56.6MB in the beginning and 71.3MB in the end (delta: 14.7MB). Free memory was 33.9MB in the beginning and 52.2MB in the end (delta: -18.3MB). Peak memory consumption was 12.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.77ms. Allocated memory is still 71.3MB. Free memory was 52.2MB in the beginning and 50.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 78.73ms. Allocated memory is still 71.3MB. Free memory was 50.8MB in the beginning and 49.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 649.20ms. Allocated memory is still 71.3MB. Free memory was 49.3MB in the beginning and 37.2MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 9445.41ms. Allocated memory was 71.3MB in the beginning and 86.0MB in the end (delta: 14.7MB). Free memory was 36.8MB in the beginning and 62.2MB in the end (delta: -25.4MB). Peak memory consumption was 22.1MB. Max. memory is 16.1GB. * Witness Printer took 67.28ms. Allocated memory is still 86.0MB. Free memory was 62.2MB in the beginning and 58.7MB in the end (delta: 3.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L226] unsigned int a ; [L227] unsigned int ma = __VERIFIER_nondet_uint(); [L228] signed char ea = __VERIFIER_nondet_char(); [L229] unsigned int b ; [L230] unsigned int mb = __VERIFIER_nondet_uint(); [L231] signed char eb = __VERIFIER_nondet_char(); [L232] unsigned int r_add1 ; [L233] unsigned int r_add2 ; [L234] unsigned int zero ; [L235] int tmp ; [L236] int tmp___0 ; [L237] int __retres14 ; [L241] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L80] return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, __retres4=0, e=0, m=0] [L241] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0] [L241] zero = base2flt(0, 0) [L242] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=0, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=0, \old(m)=16777216, __retres4=2147483648, e=0, m=0, res=2147483648] [L80] return (__retres4); VAL [\old(e)=0, \old(m)=16777216, \result=-2147483648, __retres4=2147483648, e=0, m=0, res=2147483648] [L242] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=-2147483648, ea=0, ma=16777216, zero=0] [L242] a = base2flt(ma, ea) [L243] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=64, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=64, \old(m)=16777216, __retres4=3221225472, e=64, m=0, res=3221225472] [L80] return (__retres4); VAL [\old(e)=64, \old(m)=16777216, \result=-1073741824, __retres4=3221225472, e=64, m=0, res=3221225472] [L243] RET, EXPR base2flt(mb, eb) VAL [a=2147483648, base2flt(mb, eb)=-1073741824, ea=0, eb=64, ma=16777216, mb=16777216, zero=0] [L243] b = base2flt(mb, eb) [L244] CALL addflt(a, b) VAL [\old(a)=2147483648, \old(b)=3221225472] [L84] unsigned int res ; [L85] unsigned int ma ; [L86] unsigned int mb ; [L87] unsigned int delta ; [L88] int ea ; [L89] int eb ; [L90] unsigned int tmp ; [L91] unsigned int __retres10 ; VAL [\old(a)=2147483648, \old(b)=3221225472, a=2147483648, b=3221225472] [L94] COND TRUE a < b [L95] tmp = a [L96] a = b [L97] b = tmp VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, tmp=2147483648] [L101] COND FALSE !(! b) [L108] ma = a & ((1U << 24U) - 1U) [L109] ea = (int )(a >> 24U) - 128 [L110] ma = ma | (1U << 24U) [L111] mb = b & ((1U << 24U) - 1U) [L112] eb = (int )(b >> 24U) - 128 [L113] mb = mb | (1U << 24U) VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L114] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L114] RET __VERIFIER_assert(ea >= eb) VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L115] delta = ea - eb VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, delta=64, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L116] CALL __VERIFIER_assert(delta < sizeof(mb) * 8) VAL [\old(cond)=0] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L17] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.3s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 214 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 194 mSDsluCounter, 3035 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 14 IncrementalHoareTripleChecker+Unchecked, 2615 mSDsCounter, 34 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 520 IncrementalHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 34 mSolverCounterUnsat, 420 mSDtfsCounter, 520 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 859 GetRequests, 789 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=6, InterpolantAutomatonStates: 60, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 6 MinimizatonAttempts, 116 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 474 NumberOfCodeBlocks, 456 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 836 ConstructedInterpolants, 1 QuantifiedInterpolants, 1398 SizeOfPredicates, 37 NumberOfNonLiveVariables, 875 ConjunctsInSsa, 91 ConjunctsInUnsatCore, 22 InterpolantComputations, 8 PerfectInterpolantSequences, 356/398 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 proved your program to be incorrect! [2021-11-23 03:33:48,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854df117-5ca1-439a-af53-6b8798d3df42/bin/utaipan-EQgc7hIp5V/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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE