./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f330893f1140a32f6e6dacd6cc5115391759545d59ea17334f6f3b644ed5a51c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:57:43,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:57:43,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:57:44,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:57:44,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:57:44,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:57:44,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:57:44,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:57:44,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:57:44,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:57:44,035 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:57:44,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:57:44,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:57:44,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:57:44,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:57:44,042 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:57:44,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:57:44,049 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:57:44,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:57:44,064 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:57:44,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:57:44,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:57:44,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:57:44,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:57:44,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:57:44,085 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:57:44,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:57:44,088 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:57:44,089 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:57:44,091 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:57:44,092 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:57:44,094 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:57:44,096 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:57:44,097 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:57:44,099 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:57:44,100 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:57:44,100 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:57:44,101 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:57:44,101 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:57:44,102 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:57:44,103 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:57:44,104 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/config/svcomp-Overflow-32bit-Taipan_Default.epf [2021-11-20 23:57:44,168 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:57:44,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:57:44,169 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:57:44,169 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:57:44,170 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:57:44,171 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:57:44,171 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:57:44,171 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:57:44,171 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:57:44,172 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:57:44,173 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:57:44,173 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:57:44,173 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:57:44,174 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:57:44,174 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:57:44,174 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:57:44,174 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:57:44,175 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:57:44,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:57:44,176 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:57:44,176 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 23:57:44,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:57:44,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:57:44,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:57:44,177 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:57:44,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:57:44,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:57:44,180 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-20 23:57:44,180 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:57:44,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:57:44,181 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:57:44,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:57:44,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:57:44,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:57:44,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:57:44,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:57:44,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:57:44,183 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:57:44,183 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:57:44,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:57:44,183 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:57:44,184 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:57:44,184 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:57:44,184 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_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f330893f1140a32f6e6dacd6cc5115391759545d59ea17334f6f3b644ed5a51c [2021-11-20 23:57:44,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:57:44,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:57:44,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:57:44,525 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:57:44,526 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:57:44,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c [2021-11-20 23:57:44,616 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/data/ab1fc2b04/0532a3b73f224b448e6274b88306bc10/FLAG5873febbb [2021-11-20 23:57:45,130 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:57:45,130 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c [2021-11-20 23:57:45,140 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/data/ab1fc2b04/0532a3b73f224b448e6274b88306bc10/FLAG5873febbb [2021-11-20 23:57:45,465 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/data/ab1fc2b04/0532a3b73f224b448e6274b88306bc10 [2021-11-20 23:57:45,468 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:57:45,469 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:57:45,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:57:45,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:57:45,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:57:45,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:57:45" (1/1) ... [2021-11-20 23:57:45,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51d81c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:45, skipping insertion in model container [2021-11-20 23:57:45,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:57:45" (1/1) ... [2021-11-20 23:57:45,503 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:57:45,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:57:45,760 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_5cc55ad5-684f-4553-948c-6de2d913a1b1/sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c[728,741] [2021-11-20 23:57:45,815 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:57:45,824 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:57:45,839 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_5cc55ad5-684f-4553-948c-6de2d913a1b1/sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c[728,741] [2021-11-20 23:57:45,919 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:57:45,934 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:57:45,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:45 WrapperNode [2021-11-20 23:57:45,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:57:45,936 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:57:45,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:57:45,937 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:57:45,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:45" (1/1) ... [2021-11-20 23:57:45,957 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:45" (1/1) ... [2021-11-20 23:57:45,993 INFO L137 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 124 [2021-11-20 23:57:45,993 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:57:45,994 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:57:45,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:57:45,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:57:46,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:45" (1/1) ... [2021-11-20 23:57:46,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:45" (1/1) ... [2021-11-20 23:57:46,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:45" (1/1) ... [2021-11-20 23:57:46,014 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:45" (1/1) ... [2021-11-20 23:57:46,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:45" (1/1) ... [2021-11-20 23:57:46,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:45" (1/1) ... [2021-11-20 23:57:46,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:45" (1/1) ... [2021-11-20 23:57:46,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:57:46,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:57:46,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:57:46,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:57:46,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:45" (1/1) ... [2021-11-20 23:57:46,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:57:46,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:57:46,097 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:57:46,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:57:46,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:57:46,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:57:46,155 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-20 23:57:46,156 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-20 23:57:46,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:57:46,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:57:46,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 23:57:46,157 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 23:57:46,242 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:57:46,244 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:57:46,717 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:57:46,817 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:57:46,817 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 23:57:46,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:57:46 BoogieIcfgContainer [2021-11-20 23:57:46,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:57:46,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:57:46,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:57:46,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:57:46,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:57:45" (1/3) ... [2021-11-20 23:57:46,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f19877b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:57:46, skipping insertion in model container [2021-11-20 23:57:46,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:45" (2/3) ... [2021-11-20 23:57:46,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f19877b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:57:46, skipping insertion in model container [2021-11-20 23:57:46,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:57:46" (3/3) ... [2021-11-20 23:57:46,830 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2021-11-20 23:57:46,837 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:57:46,837 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2021-11-20 23:57:46,915 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:57:46,924 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 [2021-11-20 23:57:46,925 INFO L340 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2021-11-20 23:57:46,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 71 states, 45 states have (on average 1.7333333333333334) internal successors, (78), 64 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 23:57:46,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 23:57:46,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:46,962 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:46,962 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting base2fltErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-20 23:57:46,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:46,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1095152428, now seen corresponding path program 1 times [2021-11-20 23:57:46,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:46,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453068278] [2021-11-20 23:57:46,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:46,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:47,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:57:47,167 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:47,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453068278] [2021-11-20 23:57:47,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453068278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:57:47,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:57:47,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:57:47,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673228362] [2021-11-20 23:57:47,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:47,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 23:57:47,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:47,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 23:57:47,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:57:47,218 INFO L87 Difference]: Start difference. First operand has 71 states, 45 states have (on average 1.7333333333333334) internal successors, (78), 64 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:57:47,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:47,295 INFO L93 Difference]: Finished difference Result 138 states and 177 transitions. [2021-11-20 23:57:47,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 23:57:47,297 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 23:57:47,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:47,308 INFO L225 Difference]: With dead ends: 138 [2021-11-20 23:57:47,308 INFO L226 Difference]: Without dead ends: 62 [2021-11-20 23:57:47,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:57:47,318 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:47,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:57:47,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-20 23:57:47,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-20 23:57:47,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 56 states have internal predecessors, (63), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:57:47,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-11-20 23:57:47,394 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 8 [2021-11-20 23:57:47,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:47,394 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-11-20 23:57:47,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:57:47,396 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-11-20 23:57:47,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 23:57:47,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:47,397 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:47,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:57:47,399 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-20 23:57:47,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:47,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1096247454, now seen corresponding path program 1 times [2021-11-20 23:57:47,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:47,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978683694] [2021-11-20 23:57:47,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:47,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:47,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:57:47,478 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:47,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978683694] [2021-11-20 23:57:47,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978683694] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:57:47,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:57:47,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:57:47,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640531029] [2021-11-20 23:57:47,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:47,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:57:47,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:47,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:57:47,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:57:47,481 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:57:47,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:47,584 INFO L93 Difference]: Finished difference Result 160 states and 194 transitions. [2021-11-20 23:57:47,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:57:47,585 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 23:57:47,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:47,590 INFO L225 Difference]: With dead ends: 160 [2021-11-20 23:57:47,591 INFO L226 Difference]: Without dead ends: 100 [2021-11-20 23:57:47,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:57:47,597 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 53 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:47,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 167 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:57:47,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-20 23:57:47,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 92. [2021-11-20 23:57:47,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 70 states have (on average 1.5) internal successors, (105), 85 states have internal predecessors, (105), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:57:47,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 113 transitions. [2021-11-20 23:57:47,623 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 113 transitions. Word has length 8 [2021-11-20 23:57:47,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:47,623 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 113 transitions. [2021-11-20 23:57:47,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:57:47,624 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 113 transitions. [2021-11-20 23:57:47,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 23:57:47,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:47,627 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:47,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:57:47,628 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting base2fltErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-20 23:57:47,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:47,629 INFO L85 PathProgramCache]: Analyzing trace with hash -2147158935, now seen corresponding path program 1 times [2021-11-20 23:57:47,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:47,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130630232] [2021-11-20 23:57:47,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:47,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:57:47,710 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:47,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130630232] [2021-11-20 23:57:47,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130630232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:57:47,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:57:47,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:57:47,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697961348] [2021-11-20 23:57:47,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:47,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:57:47,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:47,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:57:47,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:57:47,717 INFO L87 Difference]: Start difference. First operand 92 states and 113 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:57:47,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:47,872 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2021-11-20 23:57:47,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:57:47,873 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-20 23:57:47,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:47,876 INFO L225 Difference]: With dead ends: 108 [2021-11-20 23:57:47,876 INFO L226 Difference]: Without dead ends: 106 [2021-11-20 23:57:47,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:57:47,883 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 66 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:47,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 223 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:57:47,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-20 23:57:47,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2021-11-20 23:57:47,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 72 states have (on average 1.4722222222222223) internal successors, (106), 87 states have internal predecessors, (106), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:57:47,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 114 transitions. [2021-11-20 23:57:47,908 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 114 transitions. Word has length 12 [2021-11-20 23:57:47,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:47,908 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 114 transitions. [2021-11-20 23:57:47,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:57:47,909 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 114 transitions. [2021-11-20 23:57:47,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 23:57:47,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:47,911 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:47,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:57:47,912 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting base2fltErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-20 23:57:47,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:47,913 INFO L85 PathProgramCache]: Analyzing trace with hash -2137417444, now seen corresponding path program 1 times [2021-11-20 23:57:47,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:47,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130691158] [2021-11-20 23:57:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:47,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:47,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:57:47,994 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:47,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130691158] [2021-11-20 23:57:47,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130691158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:57:47,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:57:47,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:57:47,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864352263] [2021-11-20 23:57:47,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:47,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:57:48,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:48,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:57:48,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:57:48,001 INFO L87 Difference]: Start difference. First operand 94 states and 114 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:57:48,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:48,121 INFO L93 Difference]: Finished difference Result 204 states and 248 transitions. [2021-11-20 23:57:48,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:57:48,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-20 23:57:48,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:48,124 INFO L225 Difference]: With dead ends: 204 [2021-11-20 23:57:48,124 INFO L226 Difference]: Without dead ends: 112 [2021-11-20 23:57:48,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:57:48,137 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 87 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:48,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 177 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:57:48,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-20 23:57:48,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 98. [2021-11-20 23:57:48,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 91 states have internal predecessors, (110), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:57:48,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 118 transitions. [2021-11-20 23:57:48,158 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 118 transitions. Word has length 13 [2021-11-20 23:57:48,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:48,158 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 118 transitions. [2021-11-20 23:57:48,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:57:48,159 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 118 transitions. [2021-11-20 23:57:48,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 23:57:48,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:48,160 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:48,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:57:48,161 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-20 23:57:48,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:48,163 INFO L85 PathProgramCache]: Analyzing trace with hash 840881872, now seen corresponding path program 1 times [2021-11-20 23:57:48,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:48,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153724157] [2021-11-20 23:57:48,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:48,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 23:57:48,215 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:48,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153724157] [2021-11-20 23:57:48,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153724157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:57:48,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:57:48,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:57:48,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277874350] [2021-11-20 23:57:48,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:48,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:57:48,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:48,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:57:48,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:57:48,220 INFO L87 Difference]: Start difference. First operand 98 states and 118 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:57:48,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:48,249 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2021-11-20 23:57:48,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:57:48,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-20 23:57:48,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:48,254 INFO L225 Difference]: With dead ends: 102 [2021-11-20 23:57:48,255 INFO L226 Difference]: Without dead ends: 101 [2021-11-20 23:57:48,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:57:48,256 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 3 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:48,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 123 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:57:48,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-20 23:57:48,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2021-11-20 23:57:48,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 75 states have (on average 1.4266666666666667) internal successors, (107), 89 states have internal predecessors, (107), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:57:48,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 115 transitions. [2021-11-20 23:57:48,292 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 115 transitions. Word has length 14 [2021-11-20 23:57:48,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:48,293 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 115 transitions. [2021-11-20 23:57:48,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:57:48,293 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 115 transitions. [2021-11-20 23:57:48,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 23:57:48,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:48,295 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:48,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:57:48,296 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting base2fltErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-20 23:57:48,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:48,297 INFO L85 PathProgramCache]: Analyzing trace with hash 840884050, now seen corresponding path program 1 times [2021-11-20 23:57:48,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:48,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65914112] [2021-11-20 23:57:48,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:48,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:57:48,358 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:48,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65914112] [2021-11-20 23:57:48,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65914112] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:57:48,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799076245] [2021-11-20 23:57:48,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:48,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:57:48,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:57:48,368 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:57:48,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:57:48,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:48,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:57:48,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:57:48,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:57:48,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799076245] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:57:48,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:57:48,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-20 23:57:48,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240947260] [2021-11-20 23:57:48,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:48,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:57:48,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:48,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:57:48,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:57:48,567 INFO L87 Difference]: Start difference. First operand 96 states and 115 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:57:48,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:48,634 INFO L93 Difference]: Finished difference Result 112 states and 138 transitions. [2021-11-20 23:57:48,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:57:48,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-20 23:57:48,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:48,637 INFO L225 Difference]: With dead ends: 112 [2021-11-20 23:57:48,637 INFO L226 Difference]: Without dead ends: 111 [2021-11-20 23:57:48,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:57:48,639 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 8 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:48,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 191 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:57:48,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-20 23:57:48,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 98. [2021-11-20 23:57:48,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 77 states have (on average 1.4155844155844155) internal successors, (109), 91 states have internal predecessors, (109), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:57:48,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 117 transitions. [2021-11-20 23:57:48,672 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 117 transitions. Word has length 14 [2021-11-20 23:57:48,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:48,672 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 117 transitions. [2021-11-20 23:57:48,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:57:48,672 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 117 transitions. [2021-11-20 23:57:48,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 23:57:48,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:48,674 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:48,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:57:48,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:57:48,894 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-20 23:57:48,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:48,895 INFO L85 PathProgramCache]: Analyzing trace with hash -2047829874, now seen corresponding path program 1 times [2021-11-20 23:57:48,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:48,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253391524] [2021-11-20 23:57:48,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:48,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:48,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 23:57:48,959 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:48,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253391524] [2021-11-20 23:57:48,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253391524] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:57:48,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:57:48,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:57:48,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325740624] [2021-11-20 23:57:48,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:48,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:57:48,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:48,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:57:48,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:57:48,961 INFO L87 Difference]: Start difference. First operand 98 states and 117 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:57:49,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:49,036 INFO L93 Difference]: Finished difference Result 136 states and 164 transitions. [2021-11-20 23:57:49,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:57:49,036 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-11-20 23:57:49,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:49,038 INFO L225 Difference]: With dead ends: 136 [2021-11-20 23:57:49,038 INFO L226 Difference]: Without dead ends: 134 [2021-11-20 23:57:49,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:57:49,040 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 86 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:49,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 176 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:57:49,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-20 23:57:49,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 116. [2021-11-20 23:57:49,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 94 states have (on average 1.4361702127659575) internal successors, (135), 108 states have internal predecessors, (135), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:57:49,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 143 transitions. [2021-11-20 23:57:49,048 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 143 transitions. Word has length 20 [2021-11-20 23:57:49,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:49,049 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 143 transitions. [2021-11-20 23:57:49,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:57:49,049 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 143 transitions. [2021-11-20 23:57:49,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 23:57:49,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:49,051 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:49,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:57:49,051 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting base2fltErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-20 23:57:49,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:49,051 INFO L85 PathProgramCache]: Analyzing trace with hash -47880238, now seen corresponding path program 1 times [2021-11-20 23:57:49,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:49,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268793867] [2021-11-20 23:57:49,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:49,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:49,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:57:49,081 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:49,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268793867] [2021-11-20 23:57:49,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268793867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:57:49,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:57:49,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:57:49,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361760960] [2021-11-20 23:57:49,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:49,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:57:49,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:49,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:57:49,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:57:49,083 INFO L87 Difference]: Start difference. First operand 116 states and 143 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:57:49,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:49,148 INFO L93 Difference]: Finished difference Result 142 states and 175 transitions. [2021-11-20 23:57:49,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:57:49,149 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 23:57:49,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:49,152 INFO L225 Difference]: With dead ends: 142 [2021-11-20 23:57:49,152 INFO L226 Difference]: Without dead ends: 140 [2021-11-20 23:57:49,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:57:49,153 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 8 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:49,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 178 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:57:49,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-20 23:57:49,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 116. [2021-11-20 23:57:49,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 95 states have (on average 1.4) internal successors, (133), 108 states have internal predecessors, (133), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:57:49,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 141 transitions. [2021-11-20 23:57:49,168 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 141 transitions. Word has length 18 [2021-11-20 23:57:49,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:49,169 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 141 transitions. [2021-11-20 23:57:49,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:57:49,169 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 141 transitions. [2021-11-20 23:57:49,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 23:57:49,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:49,172 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:49,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 23:57:49,172 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting base2fltErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-20 23:57:49,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:49,173 INFO L85 PathProgramCache]: Analyzing trace with hash 17962550, now seen corresponding path program 1 times [2021-11-20 23:57:49,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:49,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996069388] [2021-11-20 23:57:49,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:49,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:49,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:49,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 23:57:49,239 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:49,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996069388] [2021-11-20 23:57:49,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996069388] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:57:49,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:57:49,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:57:49,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876513511] [2021-11-20 23:57:49,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:49,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:57:49,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:49,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:57:49,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:57:49,242 INFO L87 Difference]: Start difference. First operand 116 states and 141 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:57:49,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:49,342 INFO L93 Difference]: Finished difference Result 129 states and 154 transitions. [2021-11-20 23:57:49,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:57:49,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-11-20 23:57:49,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:49,344 INFO L225 Difference]: With dead ends: 129 [2021-11-20 23:57:49,344 INFO L226 Difference]: Without dead ends: 127 [2021-11-20 23:57:49,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:57:49,346 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 73 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:49,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 177 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:57:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-20 23:57:49,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 113. [2021-11-20 23:57:49,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 92 states have (on average 1.391304347826087) internal successors, (128), 105 states have internal predecessors, (128), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:57:49,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2021-11-20 23:57:49,355 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 22 [2021-11-20 23:57:49,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:49,355 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2021-11-20 23:57:49,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:57:49,356 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2021-11-20 23:57:49,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 23:57:49,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:49,357 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:49,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 23:57:49,358 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-20 23:57:49,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:49,358 INFO L85 PathProgramCache]: Analyzing trace with hash -872556697, now seen corresponding path program 1 times [2021-11-20 23:57:49,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:49,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764009934] [2021-11-20 23:57:49,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:49,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:49,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:49,397 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 23:57:49,398 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:49,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764009934] [2021-11-20 23:57:49,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764009934] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:57:49,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:57:49,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:57:49,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108216003] [2021-11-20 23:57:49,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:49,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:57:49,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:49,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:57:49,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:57:49,400 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:57:49,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:49,478 INFO L93 Difference]: Finished difference Result 124 states and 150 transitions. [2021-11-20 23:57:49,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:57:49,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-11-20 23:57:49,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:49,480 INFO L225 Difference]: With dead ends: 124 [2021-11-20 23:57:49,480 INFO L226 Difference]: Without dead ends: 122 [2021-11-20 23:57:49,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:57:49,482 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 82 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:49,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 168 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:57:49,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-20 23:57:49,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 107. [2021-11-20 23:57:49,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 88 states have (on average 1.3636363636363635) internal successors, (120), 99 states have internal predecessors, (120), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:57:49,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 128 transitions. [2021-11-20 23:57:49,490 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 128 transitions. Word has length 26 [2021-11-20 23:57:49,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:49,491 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 128 transitions. [2021-11-20 23:57:49,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:57:49,491 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 128 transitions. [2021-11-20 23:57:49,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 23:57:49,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:49,492 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:49,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 23:57:49,493 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-20 23:57:49,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:49,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1113586877, now seen corresponding path program 1 times [2021-11-20 23:57:49,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:49,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049111238] [2021-11-20 23:57:49,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:49,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 23:57:49,540 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:49,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049111238] [2021-11-20 23:57:49,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049111238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:57:49,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88841182] [2021-11-20 23:57:49,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:49,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:57:49,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:57:49,542 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:57:49,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:57:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:49,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 23:57:49,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 23:57:49,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 23:57:50,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88841182] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:57:50,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:57:50,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 10] total 16 [2021-11-20 23:57:50,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383498906] [2021-11-20 23:57:50,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:50,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:57:50,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:50,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:57:50,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-20 23:57:50,387 INFO L87 Difference]: Start difference. First operand 107 states and 128 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 23:57:50,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:50,472 INFO L93 Difference]: Finished difference Result 143 states and 165 transitions. [2021-11-20 23:57:50,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:57:50,473 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-11-20 23:57:50,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:50,475 INFO L225 Difference]: With dead ends: 143 [2021-11-20 23:57:50,475 INFO L226 Difference]: Without dead ends: 111 [2021-11-20 23:57:50,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-11-20 23:57:50,476 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:50,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 310 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:57:50,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-20 23:57:50,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-11-20 23:57:50,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 88 states have (on average 1.3409090909090908) internal successors, (118), 99 states have internal predecessors, (118), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:57:50,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2021-11-20 23:57:50,485 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 28 [2021-11-20 23:57:50,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:50,486 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2021-11-20 23:57:50,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 23:57:50,486 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2021-11-20 23:57:50,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 23:57:50,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:50,487 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:50,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:57:50,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 23:57:50,698 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting base2fltErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-20 23:57:50,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:50,699 INFO L85 PathProgramCache]: Analyzing trace with hash -120913201, now seen corresponding path program 1 times [2021-11-20 23:57:50,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:50,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174274550] [2021-11-20 23:57:50,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:50,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 23:57:50,746 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:50,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174274550] [2021-11-20 23:57:50,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174274550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:57:50,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:57:50,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:57:50,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122426094] [2021-11-20 23:57:50,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:50,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:57:50,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:50,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:57:50,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:57:50,748 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:57:50,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:50,819 INFO L93 Difference]: Finished difference Result 118 states and 138 transitions. [2021-11-20 23:57:50,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:57:50,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-11-20 23:57:50,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:50,821 INFO L225 Difference]: With dead ends: 118 [2021-11-20 23:57:50,821 INFO L226 Difference]: Without dead ends: 116 [2021-11-20 23:57:50,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:57:50,822 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 70 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:50,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 168 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:57:50,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-20 23:57:50,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 102. [2021-11-20 23:57:50,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 85 states have (on average 1.3294117647058823) internal successors, (113), 94 states have internal predecessors, (113), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:57:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 121 transitions. [2021-11-20 23:57:50,831 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 121 transitions. Word has length 28 [2021-11-20 23:57:50,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:50,832 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 121 transitions. [2021-11-20 23:57:50,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:57:50,832 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 121 transitions. [2021-11-20 23:57:50,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 23:57:50,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:50,833 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:50,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 23:57:50,834 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-20 23:57:50,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:50,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1605976308, now seen corresponding path program 1 times [2021-11-20 23:57:50,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:50,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504616886] [2021-11-20 23:57:50,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:50,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:50,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 23:57:50,913 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:50,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504616886] [2021-11-20 23:57:50,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504616886] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:57:50,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373450871] [2021-11-20 23:57:50,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:50,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:57:50,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:57:50,915 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:57:50,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:57:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:50,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 23:57:50,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 23:57:51,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:51,455 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 23:57:51,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373450871] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:57:51,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2016305104] [2021-11-20 23:57:51,475 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-20 23:57:51,476 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:57:51,481 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:57:51,487 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:57:51,488 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:57:52,193 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 58 for LOIs [2021-11-20 23:57:52,605 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:57:53,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2016305104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:57:53,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:57:53,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 9, 7] total 23 [2021-11-20 23:57:53,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318102614] [2021-11-20 23:57:53,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:53,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:57:53,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:53,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:57:53,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-11-20 23:57:53,379 INFO L87 Difference]: Start difference. First operand 102 states and 121 transitions. Second operand has 10 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 23:57:53,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:53,618 INFO L93 Difference]: Finished difference Result 232 states and 274 transitions. [2021-11-20 23:57:53,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 23:57:53,619 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-11-20 23:57:53,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:53,620 INFO L225 Difference]: With dead ends: 232 [2021-11-20 23:57:53,621 INFO L226 Difference]: Without dead ends: 132 [2021-11-20 23:57:53,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-11-20 23:57:53,622 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 90 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:53,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 359 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:57:53,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-20 23:57:53,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 96. [2021-11-20 23:57:53,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 78 states have (on average 1.3076923076923077) internal successors, (102), 88 states have internal predecessors, (102), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 23:57:53,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2021-11-20 23:57:53,635 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 32 [2021-11-20 23:57:53,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:53,635 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2021-11-20 23:57:53,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 23:57:53,636 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2021-11-20 23:57:53,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 23:57:53,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:53,637 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:53,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:57:53,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 23:57:53,858 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-20 23:57:53,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:53,859 INFO L85 PathProgramCache]: Analyzing trace with hash 144043153, now seen corresponding path program 1 times [2021-11-20 23:57:53,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:53,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554697292] [2021-11-20 23:57:53,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:53,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 23:57:53,938 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:53,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554697292] [2021-11-20 23:57:53,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554697292] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:57:53,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274100096] [2021-11-20 23:57:53,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:53,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:57:53,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:57:53,940 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:57:53,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:57:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:54,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 23:57:54,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 23:57:54,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 23:57:54,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274100096] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:57:54,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2069003553] [2021-11-20 23:57:54,491 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-20 23:57:54,491 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:57:54,492 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:57:54,492 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:57:54,492 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:57:57,008 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2021-11-20 23:57:57,486 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:57:59,700 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:57:59,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:57:59,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 7] total 16 [2021-11-20 23:57:59,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981390008] [2021-11-20 23:57:59,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:57:59,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 23:57:59,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:59,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 23:57:59,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-11-20 23:57:59,703 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand has 16 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 4 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-20 23:58:00,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:58:00,150 INFO L93 Difference]: Finished difference Result 257 states and 297 transitions. [2021-11-20 23:58:00,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 23:58:00,154 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 4 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 41 [2021-11-20 23:58:00,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:58:00,155 INFO L225 Difference]: With dead ends: 257 [2021-11-20 23:58:00,155 INFO L226 Difference]: Without dead ends: 146 [2021-11-20 23:58:00,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=230, Invalid=1492, Unknown=0, NotChecked=0, Total=1722 [2021-11-20 23:58:00,158 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 60 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:58:00,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 645 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:58:00,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-20 23:58:00,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 98. [2021-11-20 23:58:00,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 80 states have (on average 1.2625) internal successors, (101), 89 states have internal predecessors, (101), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:58:00,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2021-11-20 23:58:00,172 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 41 [2021-11-20 23:58:00,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:58:00,173 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2021-11-20 23:58:00,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 4 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-20 23:58:00,173 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2021-11-20 23:58:00,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 23:58:00,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:58:00,174 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 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] [2021-11-20 23:58:00,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:58:00,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:58:00,388 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-20 23:58:00,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:58:00,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1426985689, now seen corresponding path program 1 times [2021-11-20 23:58:00,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:58:00,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513901192] [2021-11-20 23:58:00,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:58:00,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:58:00,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:58:00,473 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 23:58:00,474 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:58:00,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513901192] [2021-11-20 23:58:00,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513901192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:58:00,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426078582] [2021-11-20 23:58:00,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:58:00,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:58:00,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:58:00,476 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:58:00,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 23:58:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:58:00,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:58:00,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:58:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:58:00,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:58:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 23:58:00,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426078582] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:58:00,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1319022418] [2021-11-20 23:58:00,896 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-20 23:58:00,897 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:58:00,897 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:58:00,897 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:58:00,897 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:58:03,872 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2021-11-20 23:58:05,324 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:58:06,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1319022418] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:58:06,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:58:06,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [6, 6, 6] total 34 [2021-11-20 23:58:06,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102730104] [2021-11-20 23:58:06,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:58:06,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 23:58:06,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:58:06,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 23:58:06,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 23:58:06,573 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand has 22 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:58:07,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:58:07,348 INFO L93 Difference]: Finished difference Result 230 states and 254 transitions. [2021-11-20 23:58:07,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 23:58:07,348 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2021-11-20 23:58:07,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:58:07,350 INFO L225 Difference]: With dead ends: 230 [2021-11-20 23:58:07,350 INFO L226 Difference]: Without dead ends: 228 [2021-11-20 23:58:07,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=306, Invalid=1416, Unknown=0, NotChecked=0, Total=1722 [2021-11-20 23:58:07,352 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 277 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:58:07,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 433 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:58:07,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-20 23:58:07,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 120. [2021-11-20 23:58:07,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 97 states have (on average 1.2577319587628866) internal successors, (122), 108 states have internal predecessors, (122), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-20 23:58:07,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 139 transitions. [2021-11-20 23:58:07,366 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 139 transitions. Word has length 49 [2021-11-20 23:58:07,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:58:07,366 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 139 transitions. [2021-11-20 23:58:07,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:58:07,367 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 139 transitions. [2021-11-20 23:58:07,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 23:58:07,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:58:07,368 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 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] [2021-11-20 23:58:07,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 23:58:07,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 23:58:07,581 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-20 23:58:07,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:58:07,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1810743554, now seen corresponding path program 1 times [2021-11-20 23:58:07,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:58:07,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729532726] [2021-11-20 23:58:07,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:58:07,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:58:07,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:58:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 23:58:07,658 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:58:07,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729532726] [2021-11-20 23:58:07,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729532726] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:58:07,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359851118] [2021-11-20 23:58:07,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:58:07,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:58:07,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:58:07,660 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:58:07,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 23:58:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:58:07,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 23:58:07,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:58:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:58:07,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:58:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 23:58:08,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359851118] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:58:08,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [225265197] [2021-11-20 23:58:08,089 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-20 23:58:08,089 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:58:08,089 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:58:08,089 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:58:08,089 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:58:10,312 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2021-11-20 23:58:11,527 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:58:12,859 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:58:12,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:58:12,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2021-11-20 23:58:12,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536804250] [2021-11-20 23:58:12,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:58:12,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 23:58:12,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:58:12,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 23:58:12,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-11-20 23:58:12,862 INFO L87 Difference]: Start difference. First operand 120 states and 139 transitions. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 23:58:13,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:58:13,366 INFO L93 Difference]: Finished difference Result 312 states and 364 transitions. [2021-11-20 23:58:13,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 23:58:13,367 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2021-11-20 23:58:13,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:58:13,370 INFO L225 Difference]: With dead ends: 312 [2021-11-20 23:58:13,370 INFO L226 Difference]: Without dead ends: 222 [2021-11-20 23:58:13,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 23:58:13,372 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 154 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:58:13,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 266 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:58:13,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-20 23:58:13,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 138. [2021-11-20 23:58:13,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 115 states have (on average 1.2434782608695651) internal successors, (143), 126 states have internal predecessors, (143), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-20 23:58:13,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 160 transitions. [2021-11-20 23:58:13,389 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 160 transitions. Word has length 50 [2021-11-20 23:58:13,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:58:13,389 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 160 transitions. [2021-11-20 23:58:13,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 23:58:13,389 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 160 transitions. [2021-11-20 23:58:13,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 23:58:13,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:58:13,390 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1] [2021-11-20 23:58:13,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 23:58:13,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 23:58:13,594 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-20 23:58:13,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:58:13,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1835847165, now seen corresponding path program 1 times [2021-11-20 23:58:13,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:58:13,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26512373] [2021-11-20 23:58:13,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:58:13,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:58:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:58:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 23:58:13,652 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:58:13,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26512373] [2021-11-20 23:58:13,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26512373] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:58:13,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792638809] [2021-11-20 23:58:13,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:58:13,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:58:13,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:58:13,655 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:58:13,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 23:58:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:58:13,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:58:13,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:58:13,799 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:58:13,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:58:14,001 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 23:58:14,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792638809] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:58:14,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1934965127] [2021-11-20 23:58:14,004 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-20 23:58:14,004 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:58:14,005 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:58:14,005 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:58:14,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:58:16,253 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2021-11-20 23:58:17,224 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:58:18,125 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:58:18,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:58:18,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2021-11-20 23:58:18,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650114088] [2021-11-20 23:58:18,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:58:18,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 23:58:18,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:58:18,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 23:58:18,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2021-11-20 23:58:18,128 INFO L87 Difference]: Start difference. First operand 138 states and 160 transitions. Second operand has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 14 states have internal predecessors, (79), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 23:58:18,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:58:18,342 INFO L93 Difference]: Finished difference Result 360 states and 421 transitions. [2021-11-20 23:58:18,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 23:58:18,343 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 14 states have internal predecessors, (79), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-11-20 23:58:18,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:58:18,346 INFO L225 Difference]: With dead ends: 360 [2021-11-20 23:58:18,346 INFO L226 Difference]: Without dead ends: 268 [2021-11-20 23:58:18,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=240, Invalid=816, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 23:58:18,348 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 187 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:58:18,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 262 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:58:18,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-20 23:58:18,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 140. [2021-11-20 23:58:18,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 117 states have (on average 1.2136752136752136) internal successors, (142), 128 states have internal predecessors, (142), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-20 23:58:18,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 159 transitions. [2021-11-20 23:58:18,405 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 159 transitions. Word has length 51 [2021-11-20 23:58:18,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:58:18,407 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 159 transitions. [2021-11-20 23:58:18,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 14 states have internal predecessors, (79), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 23:58:18,407 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 159 transitions. [2021-11-20 23:58:18,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 23:58:18,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:58:18,408 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 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] [2021-11-20 23:58:18,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 23:58:18,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:58:18,632 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-20 23:58:18,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:58:18,633 INFO L85 PathProgramCache]: Analyzing trace with hash 590037250, now seen corresponding path program 2 times [2021-11-20 23:58:18,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:58:18,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047932975] [2021-11-20 23:58:18,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:58:18,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:58:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:58:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 3 proven. 83 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 23:58:18,848 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:58:18,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047932975] [2021-11-20 23:58:18,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047932975] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:58:18,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004063146] [2021-11-20 23:58:18,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:58:18,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:58:18,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:58:18,849 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:58:18,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 23:58:18,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-20 23:58:18,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:58:18,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 23:58:18,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:58:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-20 23:58:19,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:58:19,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004063146] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:58:19,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:58:19,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2021-11-20 23:58:19,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802267146] [2021-11-20 23:58:19,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:58:19,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:58:19,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:58:19,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:58:19,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:58:19,189 INFO L87 Difference]: Start difference. First operand 140 states and 159 transitions. Second operand has 7 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 23:58:19,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:58:19,266 INFO L93 Difference]: Finished difference Result 174 states and 195 transitions. [2021-11-20 23:58:19,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:58:19,267 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 70 [2021-11-20 23:58:19,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:58:19,268 INFO L225 Difference]: With dead ends: 174 [2021-11-20 23:58:19,268 INFO L226 Difference]: Without dead ends: 173 [2021-11-20 23:58:19,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-20 23:58:19,270 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 29 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 333 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 [2021-11-20 23:58:19,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 333 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:58:19,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-20 23:58:19,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 146. [2021-11-20 23:58:19,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 122 states have (on average 1.2049180327868851) internal successors, (147), 133 states have internal predecessors, (147), 6 states have call successors, (6), 4 states have call predecessors, (6), 8 states have return successors, (13), 8 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-20 23:58:19,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 166 transitions. [2021-11-20 23:58:19,285 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 166 transitions. Word has length 70 [2021-11-20 23:58:19,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:58:19,286 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 166 transitions. [2021-11-20 23:58:19,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 23:58:19,286 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 166 transitions. [2021-11-20 23:58:19,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-20 23:58:19,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:58:19,287 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:58:19,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-20 23:58:19,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 23:58:19,500 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-20 23:58:19,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:58:19,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1023036925, now seen corresponding path program 2 times [2021-11-20 23:58:19,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:58:19,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137233471] [2021-11-20 23:58:19,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:58:19,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:58:19,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:58:19,647 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 3 proven. 95 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 23:58:19,647 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:58:19,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137233471] [2021-11-20 23:58:19,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137233471] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:58:19,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330593317] [2021-11-20 23:58:19,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:58:19,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:58:19,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:58:19,652 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:58:19,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 23:58:19,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 23:58:19,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:58:19,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 23:58:19,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:58:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-20 23:58:19,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:58:29,540 WARN L838 $PredicateComparison]: unable to prove that (forall ((|aux_mod_aux_div_v_ULTIMATE.start_mulflt_~a#1_22_48_61| Int)) (or (<= 2147483776 |aux_mod_aux_div_v_ULTIMATE.start_mulflt_~a#1_22_48_61|) (< |aux_mod_aux_div_v_ULTIMATE.start_mulflt_~a#1_22_48_61| 0) (and (let ((.cse0 (* |c_ULTIMATE.start_main_~a~0#1| (- 1)))) (or (<= (div (+ (- 1) (* |aux_mod_aux_div_v_ULTIMATE.start_mulflt_~a#1_22_48_61| 16777216) .cse0) (- 72057594037927936)) (+ (div (+ (* |aux_mod_aux_div_v_ULTIMATE.start_mulflt_~a#1_22_48_61| (- 16777216)) |c_ULTIMATE.start_main_~a~0#1| (- 16777216)) 72057594037927936) 1)) (<= (div (+ (* (div (+ (- 1) .cse0) (- 16777216)) (- 1)) 2147483648) (- 4294967296)) (+ (div (+ (div (+ |c_ULTIMATE.start_main_~a~0#1| (- 16777216)) 16777216) (- 4294967295)) 4294967296) 1)))) (let ((.cse1 (div (+ (- 16777215) (mod |c_ULTIMATE.start_main_~a~0#1| 4294967296)) 16777216))) (<= (div (+ (* (div (+ (- 4294967295) .cse1) (- 256)) (- 1)) (div (+ |aux_mod_aux_div_v_ULTIMATE.start_mulflt_~a#1_22_48_61| (- 256)) 256) 1) (- 16777216)) (+ (div (+ 8388608 (* (div (+ (* |aux_mod_aux_div_v_ULTIMATE.start_mulflt_~a#1_22_48_61| (- 1)) .cse1) (- 256)) (- 1))) 16777216) 1)))))) is different from false [2021-11-20 23:58:36,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330593317] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:58:36,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [219047755] [2021-11-20 23:58:36,924 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-20 23:58:36,924 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:58:36,924 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:58:36,925 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:58:36,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:58:39,811 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2021-11-20 23:58:41,003 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:58:42,453 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:58:42,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:58:42,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 15 [2021-11-20 23:58:42,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449002103] [2021-11-20 23:58:42,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:58:42,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 23:58:42,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:58:42,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 23:58:42,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=816, Unknown=1, NotChecked=60, Total=1056 [2021-11-20 23:58:42,456 INFO L87 Difference]: Start difference. First operand 146 states and 166 transitions. Second operand has 15 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 3 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 23:58:42,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:58:42,792 INFO L93 Difference]: Finished difference Result 433 states and 508 transitions. [2021-11-20 23:58:42,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 23:58:42,793 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 3 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 71 [2021-11-20 23:58:42,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:58:42,796 INFO L225 Difference]: With dead ends: 433 [2021-11-20 23:58:42,796 INFO L226 Difference]: Without dead ends: 337 [2021-11-20 23:58:42,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=231, Invalid=1104, Unknown=1, NotChecked=70, Total=1406 [2021-11-20 23:58:42,799 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 183 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:58:42,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 446 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:58:42,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-11-20 23:58:42,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 155. [2021-11-20 23:58:42,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 129 states have (on average 1.2015503875968991) internal successors, (155), 141 states have internal predecessors, (155), 7 states have call successors, (7), 4 states have call predecessors, (7), 9 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2021-11-20 23:58:42,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 180 transitions. [2021-11-20 23:58:42,844 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 180 transitions. Word has length 71 [2021-11-20 23:58:42,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:58:42,845 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 180 transitions. [2021-11-20 23:58:42,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 3 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 23:58:42,845 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 180 transitions. [2021-11-20 23:58:42,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-20 23:58:42,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:58:42,847 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 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] [2021-11-20 23:58:42,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 23:58:43,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:58:43,048 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-20 23:58:43,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:58:43,049 INFO L85 PathProgramCache]: Analyzing trace with hash 90118852, now seen corresponding path program 1 times [2021-11-20 23:58:43,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:58:43,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270686378] [2021-11-20 23:58:43,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:58:43,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:58:43,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:58:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 3 proven. 83 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 23:58:43,249 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:58:43,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270686378] [2021-11-20 23:58:43,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270686378] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:58:43,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175117301] [2021-11-20 23:58:43,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:58:43,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:58:43,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:58:43,251 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:58:43,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 23:58:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:58:43,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 23:58:43,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:58:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 21 proven. 75 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:58:43,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:58:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 3 proven. 83 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 23:58:44,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175117301] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:58:44,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [485585377] [2021-11-20 23:58:44,174 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2021-11-20 23:58:44,174 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:58:44,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:58:44,175 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:58:44,175 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:58:47,951 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2021-11-20 23:58:49,140 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:58:53,468 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:58:53,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:58:53,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2021-11-20 23:58:53,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332899482] [2021-11-20 23:58:53,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:58:53,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 23:58:53,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:58:53,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 23:58:53,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1327, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 23:58:53,471 INFO L87 Difference]: Start difference. First operand 155 states and 180 transitions. Second operand has 25 states, 25 states have (on average 5.28) internal successors, (132), 25 states have internal predecessors, (132), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 23:59:06,199 WARN L227 SmtUtils]: Spent 7.17s on a formula simplification. DAG size of input: 36 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:59:22,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:59:22,846 INFO L93 Difference]: Finished difference Result 466 states and 551 transitions. [2021-11-20 23:59:22,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 23:59:22,847 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.28) internal successors, (132), 25 states have internal predecessors, (132), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2021-11-20 23:59:22,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:59:22,849 INFO L225 Difference]: With dead ends: 466 [2021-11-20 23:59:22,850 INFO L226 Difference]: Without dead ends: 366 [2021-11-20 23:59:22,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 33.4s TimeCoverageRelationStatistics Valid=650, Invalid=2210, Unknown=2, NotChecked=0, Total=2862 [2021-11-20 23:59:22,852 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 210 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:59:22,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 694 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 23:59:22,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-11-20 23:59:22,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 188. [2021-11-20 23:59:22,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 162 states have (on average 1.191358024691358) internal successors, (193), 174 states have internal predecessors, (193), 7 states have call successors, (7), 4 states have call predecessors, (7), 9 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2021-11-20 23:59:22,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 218 transitions. [2021-11-20 23:59:22,874 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 218 transitions. Word has length 72 [2021-11-20 23:59:22,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:59:22,874 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 218 transitions. [2021-11-20 23:59:22,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.28) internal successors, (132), 25 states have internal predecessors, (132), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 23:59:22,875 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 218 transitions. [2021-11-20 23:59:22,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-20 23:59:22,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:59:22,876 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 4, 4, 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] [2021-11-20 23:59:22,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 23:59:23,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:59:23,088 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-20 23:59:23,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:59:23,089 INFO L85 PathProgramCache]: Analyzing trace with hash 333694747, now seen corresponding path program 1 times [2021-11-20 23:59:23,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:59:23,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181290074] [2021-11-20 23:59:23,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:59:23,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:59:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:59:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 3 proven. 127 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 23:59:23,274 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:59:23,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181290074] [2021-11-20 23:59:23,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181290074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:59:23,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672163564] [2021-11-20 23:59:23,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:59:23,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:59:23,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:59:23,276 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:59:23,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 23:59:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:59:23,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 23:59:23,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:59:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 21 proven. 119 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:59:23,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:59:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 3 proven. 127 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 23:59:23,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672163564] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:59:23,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1749488523] [2021-11-20 23:59:23,974 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-20 23:59:23,974 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:59:23,974 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:59:23,974 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:59:23,975 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:59:27,365 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2021-11-20 23:59:28,385 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:59:30,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1749488523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:59:30,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:59:30,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [11, 11, 11] total 51 [2021-11-20 23:59:30,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518135756] [2021-11-20 23:59:30,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:59:30,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 23:59:30,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:59:30,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 23:59:30,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=2061, Unknown=0, NotChecked=0, Total=2550 [2021-11-20 23:59:30,457 INFO L87 Difference]: Start difference. First operand 188 states and 218 transitions. Second operand has 24 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:59:31,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:59:31,413 INFO L93 Difference]: Finished difference Result 301 states and 342 transitions. [2021-11-20 23:59:31,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 23:59:31,414 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 77 [2021-11-20 23:59:31,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:59:31,416 INFO L225 Difference]: With dead ends: 301 [2021-11-20 23:59:31,416 INFO L226 Difference]: Without dead ends: 299 [2021-11-20 23:59:31,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1553 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=678, Invalid=2744, Unknown=0, NotChecked=0, Total=3422 [2021-11-20 23:59:31,418 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 263 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:59:31,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 323 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 23:59:31,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-20 23:59:31,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 190. [2021-11-20 23:59:31,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 164 states have (on average 1.1890243902439024) internal successors, (195), 176 states have internal predecessors, (195), 7 states have call successors, (7), 4 states have call predecessors, (7), 9 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2021-11-20 23:59:31,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 220 transitions. [2021-11-20 23:59:31,439 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 220 transitions. Word has length 77 [2021-11-20 23:59:31,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:59:31,440 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 220 transitions. [2021-11-20 23:59:31,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:59:31,440 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 220 transitions. [2021-11-20 23:59:31,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-20 23:59:31,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:59:31,442 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:59:31,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 23:59:31,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:59:31,661 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-20 23:59:31,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:59:31,661 INFO L85 PathProgramCache]: Analyzing trace with hash 2067288453, now seen corresponding path program 1 times [2021-11-20 23:59:31,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:59:31,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156360662] [2021-11-20 23:59:31,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:59:31,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:59:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:59:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 3 proven. 127 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 23:59:31,804 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:59:31,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156360662] [2021-11-20 23:59:31,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156360662] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:59:31,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544782571] [2021-11-20 23:59:31,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:59:31,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:59:31,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:59:31,806 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:59:31,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 23:59:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:59:31,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 23:59:31,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:59:32,138 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 21 proven. 119 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:59:32,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:59:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 3 proven. 127 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 23:59:32,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544782571] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:59:32,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1396485156] [2021-11-20 23:59:32,677 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2021-11-20 23:59:32,677 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:59:32,678 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:59:32,678 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:59:32,678 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:59:37,226 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2021-11-20 23:59:38,548 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:59:42,171 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:59:42,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:59:42,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2021-11-20 23:59:42,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590079119] [2021-11-20 23:59:42,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:59:42,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 23:59:42,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:59:42,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 23:59:42,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1555, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 23:59:42,173 INFO L87 Difference]: Start difference. First operand 190 states and 220 transitions. Second operand has 29 states, 29 states have (on average 5.379310344827586) internal successors, (156), 29 states have internal predecessors, (156), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 23:59:42,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:59:42,648 INFO L93 Difference]: Finished difference Result 644 states and 778 transitions. [2021-11-20 23:59:42,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 23:59:42,649 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.379310344827586) internal successors, (156), 29 states have internal predecessors, (156), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 78 [2021-11-20 23:59:42,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:59:42,657 INFO L225 Difference]: With dead ends: 644 [2021-11-20 23:59:42,657 INFO L226 Difference]: Without dead ends: 540 [2021-11-20 23:59:42,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=596, Invalid=1756, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 23:59:42,661 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 363 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:59:42,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 428 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:59:42,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-20 23:59:42,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 202. [2021-11-20 23:59:42,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 176 states have (on average 1.1534090909090908) internal successors, (203), 188 states have internal predecessors, (203), 7 states have call successors, (7), 4 states have call predecessors, (7), 9 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2021-11-20 23:59:42,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 228 transitions. [2021-11-20 23:59:42,704 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 228 transitions. Word has length 78 [2021-11-20 23:59:42,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:59:42,704 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 228 transitions. [2021-11-20 23:59:42,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.379310344827586) internal successors, (156), 29 states have internal predecessors, (156), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 23:59:42,705 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 228 transitions. [2021-11-20 23:59:42,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 23:59:42,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:59:42,707 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 4, 4, 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] [2021-11-20 23:59:42,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 23:59:42,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-20 23:59:42,920 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-20 23:59:42,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:59:42,921 INFO L85 PathProgramCache]: Analyzing trace with hash -539354428, now seen corresponding path program 2 times [2021-11-20 23:59:42,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:59:42,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414713055] [2021-11-20 23:59:42,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:59:42,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:59:42,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:59:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 3 proven. 463 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 23:59:43,332 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:59:43,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414713055] [2021-11-20 23:59:43,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414713055] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:59:43,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829217217] [2021-11-20 23:59:43,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:59:43,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:59:43,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:59:43,334 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:59:43,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 23:59:43,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 23:59:43,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:59:43,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 23:59:43,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:59:43,790 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-11-20 23:59:43,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:59:43,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829217217] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:59:43,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:59:43,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [18] total 24 [2021-11-20 23:59:43,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960945473] [2021-11-20 23:59:43,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:59:43,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:59:43,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:59:43,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:59:43,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-11-20 23:59:43,792 INFO L87 Difference]: Start difference. First operand 202 states and 228 transitions. Second operand has 8 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 23:59:43,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:59:43,911 INFO L93 Difference]: Finished difference Result 260 states and 286 transitions. [2021-11-20 23:59:43,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:59:43,912 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 112 [2021-11-20 23:59:43,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:59:43,914 INFO L225 Difference]: With dead ends: 260 [2021-11-20 23:59:43,914 INFO L226 Difference]: Without dead ends: 259 [2021-11-20 23:59:43,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-11-20 23:59:43,916 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 80 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:59:43,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 375 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:59:43,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-20 23:59:43,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 208. [2021-11-20 23:59:43,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 182 states have (on average 1.1483516483516483) internal successors, (209), 193 states have internal predecessors, (209), 7 states have call successors, (7), 4 states have call predecessors, (7), 9 states have return successors, (18), 10 states have call predecessors, (18), 7 states have call successors, (18) [2021-11-20 23:59:43,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 234 transitions. [2021-11-20 23:59:43,942 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 234 transitions. Word has length 112 [2021-11-20 23:59:43,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:59:43,942 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 234 transitions. [2021-11-20 23:59:43,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 23:59:43,943 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 234 transitions. [2021-11-20 23:59:43,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 23:59:43,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:59:43,946 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:59:43,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 23:59:44,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 23:59:44,161 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-20 23:59:44,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:59:44,161 INFO L85 PathProgramCache]: Analyzing trace with hash 459882066, now seen corresponding path program 1 times [2021-11-20 23:59:44,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:59:44,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100434107] [2021-11-20 23:59:44,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:59:44,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:59:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:59:44,576 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 3 proven. 463 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 23:59:44,576 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:59:44,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100434107] [2021-11-20 23:59:44,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100434107] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:59:44,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065936636] [2021-11-20 23:59:44,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:59:44,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:59:44,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:59:44,578 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:59:44,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 23:59:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:59:44,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 23:59:44,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:59:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-11-20 23:59:45,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:59:45,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065936636] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:59:45,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:59:45,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [18] total 26 [2021-11-20 23:59:45,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544172361] [2021-11-20 23:59:45,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:59:45,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:59:45,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:59:45,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:59:45,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-11-20 23:59:45,074 INFO L87 Difference]: Start difference. First operand 208 states and 234 transitions. Second operand has 10 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 23:59:45,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:59:45,356 INFO L93 Difference]: Finished difference Result 263 states and 289 transitions. [2021-11-20 23:59:45,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 23:59:45,357 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 113 [2021-11-20 23:59:45,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:59:45,359 INFO L225 Difference]: With dead ends: 263 [2021-11-20 23:59:45,359 INFO L226 Difference]: Without dead ends: 260 [2021-11-20 23:59:45,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-11-20 23:59:45,361 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 90 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:59:45,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 395 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:59:45,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-20 23:59:45,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 219. [2021-11-20 23:59:45,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 193 states have (on average 1.160621761658031) internal successors, (224), 204 states have internal predecessors, (224), 7 states have call successors, (7), 4 states have call predecessors, (7), 9 states have return successors, (18), 10 states have call predecessors, (18), 7 states have call successors, (18) [2021-11-20 23:59:45,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 249 transitions. [2021-11-20 23:59:45,388 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 249 transitions. Word has length 113 [2021-11-20 23:59:45,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:59:45,389 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 249 transitions. [2021-11-20 23:59:45,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 23:59:45,389 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 249 transitions. [2021-11-20 23:59:45,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-20 23:59:45,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:59:45,394 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:59:45,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 23:59:45,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:59:45,608 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-20 23:59:45,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:59:45,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1371442310, now seen corresponding path program 1 times [2021-11-20 23:59:45,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:59:45,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796069237] [2021-11-20 23:59:45,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:59:45,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:59:45,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:59:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 3 proven. 463 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 23:59:45,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:59:45,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796069237] [2021-11-20 23:59:45,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796069237] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:59:45,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843229983] [2021-11-20 23:59:45,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:59:45,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:59:45,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:59:45,990 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:59:45,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 23:59:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:59:46,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 23:59:46,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:59:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 21 proven. 455 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:59:46,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:59:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 3 proven. 463 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 23:59:48,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843229983] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:59:48,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [496367733] [2021-11-20 23:59:48,309 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2021-11-20 23:59:48,310 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:59:48,310 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:59:48,311 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:59:48,311 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:59:52,578 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-20 23:59:52,592 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-20 23:59:52,843 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-20 23:59:52,992 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2021-11-20 23:59:53,996 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:59:56,405 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:59:56,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:59:56,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 49 [2021-11-20 23:59:56,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937323510] [2021-11-20 23:59:56,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:59:56,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-20 23:59:56,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:59:56,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-20 23:59:56,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=793, Invalid=3629, Unknown=0, NotChecked=0, Total=4422 [2021-11-20 23:59:56,410 INFO L87 Difference]: Start difference. First operand 219 states and 249 transitions. Second operand has 49 states, 49 states have (on average 5.183673469387755) internal successors, (254), 49 states have internal predecessors, (254), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:00:14,872 WARN L227 SmtUtils]: Spent 16.75s on a formula simplification. DAG size of input: 51 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:00:24,456 WARN L227 SmtUtils]: Spent 6.90s on a formula simplification. DAG size of input: 46 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:01:08,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:08,110 INFO L93 Difference]: Finished difference Result 670 states and 786 transitions. [2021-11-21 00:01:08,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-21 00:01:08,112 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 5.183673469387755) internal successors, (254), 49 states have internal predecessors, (254), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 114 [2021-11-21 00:01:08,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:08,116 INFO L225 Difference]: With dead ends: 670 [2021-11-21 00:01:08,116 INFO L226 Difference]: Without dead ends: 553 [2021-11-21 00:01:08,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2271 ImplicationChecksByTransitivity, 73.1s TimeCoverageRelationStatistics Valid=1778, Invalid=6222, Unknown=10, NotChecked=0, Total=8010 [2021-11-21 00:01:08,120 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 480 mSDsluCounter, 1595 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:08,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 1590 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1502 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-21 00:01:08,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-11-21 00:01:08,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 257. [2021-11-21 00:01:08,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 231 states have (on average 1.155844155844156) internal successors, (267), 242 states have internal predecessors, (267), 7 states have call successors, (7), 4 states have call predecessors, (7), 9 states have return successors, (18), 10 states have call predecessors, (18), 7 states have call successors, (18) [2021-11-21 00:01:08,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 292 transitions. [2021-11-21 00:01:08,149 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 292 transitions. Word has length 114 [2021-11-21 00:01:08,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:08,149 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 292 transitions. [2021-11-21 00:01:08,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 5.183673469387755) internal successors, (254), 49 states have internal predecessors, (254), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:01:08,150 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 292 transitions. [2021-11-21 00:01:08,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-21 00:01:08,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:08,152 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:08,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-21 00:01:08,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:08,379 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-21 00:01:08,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:08,380 INFO L85 PathProgramCache]: Analyzing trace with hash 186093445, now seen corresponding path program 2 times [2021-11-21 00:01:08,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:08,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536916926] [2021-11-21 00:01:08,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:08,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:08,713 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 3 proven. 640 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 00:01:08,713 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:08,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536916926] [2021-11-21 00:01:08,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536916926] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:01:08,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18653381] [2021-11-21 00:01:08,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:01:08,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:01:08,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:08,714 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:01:08,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc55ad5-684f-4553-948c-6de2d913a1b1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process