./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/byte_add-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/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_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7dfc9f1e1cbceb1807370dcac22a0449d857eff9a54bdefbc84178983a910e84 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:20:06,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:20:06,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:20:06,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:20:06,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:20:06,158 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:20:06,161 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:20:06,167 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:20:06,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:20:06,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:20:06,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:20:06,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:20:06,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:20:06,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:20:06,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:20:06,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:20:06,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:20:06,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:20:06,212 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:20:06,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:20:06,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:20:06,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:20:06,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:20:06,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:20:06,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:20:06,246 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:20:06,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:20:06,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:20:06,251 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:20:06,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:20:06,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:20:06,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:20:06,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:20:06,260 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:20:06,262 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:20:06,263 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:20:06,264 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:20:06,264 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:20:06,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:20:06,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:20:06,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:20:06,268 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:20:06,328 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:20:06,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:20:06,329 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:20:06,329 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:20:06,338 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:20:06,339 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:20:06,339 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:20:06,340 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:20:06,340 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:20:06,340 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:20:06,342 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:20:06,342 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:20:06,343 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:20:06,343 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:20:06,343 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:20:06,344 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:20:06,344 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:20:06,344 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:20:06,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:20:06,346 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:20:06,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:20:06,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:20:06,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:20:06,347 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:20:06,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:20:06,348 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:20:06,350 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:20:06,350 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:20:06,351 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:20:06,351 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:20:06,351 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:20:06,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:20:06,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:20:06,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:20:06,353 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:20:06,353 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:20:06,353 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:20:06,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:20:06,354 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:20:06,354 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:20:06,355 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:20:06,355 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_5311a7a9-42dd-4248-9d9e-293241f5b6c1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7dfc9f1e1cbceb1807370dcac22a0449d857eff9a54bdefbc84178983a910e84 [2021-11-21 00:20:06,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:20:06,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:20:06,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:20:06,765 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:20:06,766 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:20:06,768 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/bitvector/byte_add-1.i [2021-11-21 00:20:06,899 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/data/75d8b8248/06870c6f9bc0423b9686f687a3a53cfa/FLAG220e913f5 [2021-11-21 00:20:07,463 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:20:07,464 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/sv-benchmarks/c/bitvector/byte_add-1.i [2021-11-21 00:20:07,472 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/data/75d8b8248/06870c6f9bc0423b9686f687a3a53cfa/FLAG220e913f5 [2021-11-21 00:20:07,827 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/data/75d8b8248/06870c6f9bc0423b9686f687a3a53cfa [2021-11-21 00:20:07,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:20:07,832 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:20:07,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:20:07,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:20:07,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:20:07,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:20:07" (1/1) ... [2021-11-21 00:20:07,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@630ceeac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:07, skipping insertion in model container [2021-11-21 00:20:07,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:20:07" (1/1) ... [2021-11-21 00:20:07,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:20:07,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:20:08,043 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_5311a7a9-42dd-4248-9d9e-293241f5b6c1/sv-benchmarks/c/bitvector/byte_add-1.i[1166,1179] [2021-11-21 00:20:08,104 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:20:08,114 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:20:08,131 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_5311a7a9-42dd-4248-9d9e-293241f5b6c1/sv-benchmarks/c/bitvector/byte_add-1.i[1166,1179] [2021-11-21 00:20:08,159 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:20:08,176 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:20:08,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:08 WrapperNode [2021-11-21 00:20:08,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:20:08,178 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:20:08,178 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:20:08,178 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:20:08,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:08" (1/1) ... [2021-11-21 00:20:08,197 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:08" (1/1) ... [2021-11-21 00:20:08,227 INFO L137 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 124 [2021-11-21 00:20:08,228 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:20:08,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:20:08,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:20:08,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:20:08,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:08" (1/1) ... [2021-11-21 00:20:08,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:08" (1/1) ... [2021-11-21 00:20:08,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:08" (1/1) ... [2021-11-21 00:20:08,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:08" (1/1) ... [2021-11-21 00:20:08,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:08" (1/1) ... [2021-11-21 00:20:08,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:08" (1/1) ... [2021-11-21 00:20:08,260 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:08" (1/1) ... [2021-11-21 00:20:08,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:20:08,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:20:08,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:20:08,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:20:08,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:08" (1/1) ... [2021-11-21 00:20:08,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:20:08,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:20:08,324 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:20:08,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:20:08,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:20:08,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:20:08,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:20:08,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:20:08,446 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:20:08,447 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:20:08,778 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:20:09,137 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:20:09,138 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 00:20:09,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:20:09 BoogieIcfgContainer [2021-11-21 00:20:09,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:20:09,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:20:09,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:20:09,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:20:09,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:20:07" (1/3) ... [2021-11-21 00:20:09,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@703231e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:20:09, skipping insertion in model container [2021-11-21 00:20:09,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:08" (2/3) ... [2021-11-21 00:20:09,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@703231e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:20:09, skipping insertion in model container [2021-11-21 00:20:09,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:20:09" (3/3) ... [2021-11-21 00:20:09,158 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2021-11-21 00:20:09,165 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:20:09,166 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:20:09,252 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:20:09,264 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 [2021-11-21 00:20:09,265 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:20:09,312 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:09,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 00:20:09,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:09,319 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 00:20:09,320 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:09,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:09,332 INFO L85 PathProgramCache]: Analyzing trace with hash 266780483, now seen corresponding path program 1 times [2021-11-21 00:20:09,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:09,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514223882] [2021-11-21 00:20:09,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:09,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:09,619 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:09,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514223882] [2021-11-21 00:20:09,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514223882] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:09,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:20:09,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:20:09,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726943956] [2021-11-21 00:20:09,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:09,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:20:09,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:09,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:20:09,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:20:09,677 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:09,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:09,736 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2021-11-21 00:20:09,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:20:09,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-21 00:20:09,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:09,748 INFO L225 Difference]: With dead ends: 15 [2021-11-21 00:20:09,749 INFO L226 Difference]: Without dead ends: 8 [2021-11-21 00:20:09,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:20:09,757 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:09,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:20:09,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-21 00:20:09,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-21 00:20:09,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:09,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2021-11-21 00:20:09,800 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2021-11-21 00:20:09,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:09,801 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2021-11-21 00:20:09,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:09,803 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2021-11-21 00:20:09,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:20:09,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:09,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:20:09,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:20:09,806 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:09,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:09,811 INFO L85 PathProgramCache]: Analyzing trace with hash -272821552, now seen corresponding path program 1 times [2021-11-21 00:20:09,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:09,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431283980] [2021-11-21 00:20:09,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:09,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:10,110 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:10,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431283980] [2021-11-21 00:20:10,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431283980] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:20:10,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638884875] [2021-11-21 00:20:10,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:10,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:20:10,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:20:10,114 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:20:10,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:20:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:10,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:20:10,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:10,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:20:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:10,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638884875] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:20:10,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1030232118] [2021-11-21 00:20:10,763 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-21 00:20:10,764 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:20:10,769 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:20:10,776 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:20:10,777 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:20:23,299 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:20:23,522 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:20:23,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:20:23,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-21 00:20:23,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637614437] [2021-11-21 00:20:23,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:20:23,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:20:23,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:23,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:20:23,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:20:23,527 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:23,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:23,654 INFO L93 Difference]: Finished difference Result 17 states and 24 transitions. [2021-11-21 00:20:23,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:20:23,655 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-21 00:20:23,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:23,656 INFO L225 Difference]: With dead ends: 17 [2021-11-21 00:20:23,657 INFO L226 Difference]: Without dead ends: 14 [2021-11-21 00:20:23,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:20:23,659 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:23,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:20:23,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-21 00:20:23,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-21 00:20:23,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:23,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2021-11-21 00:20:23,667 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 6 [2021-11-21 00:20:23,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:23,667 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2021-11-21 00:20:23,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:23,668 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2021-11-21 00:20:23,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 00:20:23,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:23,669 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2021-11-21 00:20:23,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:20:23,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:20:23,898 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:23,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:23,899 INFO L85 PathProgramCache]: Analyzing trace with hash 2091235971, now seen corresponding path program 2 times [2021-11-21 00:20:23,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:23,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528305040] [2021-11-21 00:20:23,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:23,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:20:24,898 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 00:20:25,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:20:25,361 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-21 00:20:25,362 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 00:20:25,368 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-21 00:20:25,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:20:25,375 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1] [2021-11-21 00:20:25,379 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 00:20:25,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 12:20:25 BoogieIcfgContainer [2021-11-21 00:20:25,480 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 00:20:25,482 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 00:20:25,482 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 00:20:25,482 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 00:20:25,483 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:20:09" (3/4) ... [2021-11-21 00:20:25,487 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-21 00:20:25,488 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 00:20:25,489 INFO L158 Benchmark]: Toolchain (without parser) took 17656.65ms. Allocated memory was 98.6MB in the beginning and 209.7MB in the end (delta: 111.1MB). Free memory was 64.3MB in the beginning and 95.0MB in the end (delta: -30.7MB). Peak memory consumption was 81.4MB. Max. memory is 16.1GB. [2021-11-21 00:20:25,492 INFO L158 Benchmark]: CDTParser took 0.84ms. Allocated memory is still 98.6MB. Free memory is still 53.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:20:25,499 INFO L158 Benchmark]: CACSL2BoogieTranslator took 343.33ms. Allocated memory was 98.6MB in the beginning and 142.6MB in the end (delta: 44.0MB). Free memory was 64.2MB in the beginning and 115.9MB in the end (delta: -51.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 00:20:25,502 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.21ms. Allocated memory is still 142.6MB. Free memory was 115.3MB in the beginning and 113.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:20:25,504 INFO L158 Benchmark]: Boogie Preprocessor took 35.21ms. Allocated memory is still 142.6MB. Free memory was 113.9MB in the beginning and 112.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:20:25,505 INFO L158 Benchmark]: RCFGBuilder took 877.56ms. Allocated memory is still 142.6MB. Free memory was 112.5MB in the beginning and 88.0MB in the end (delta: 24.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-11-21 00:20:25,506 INFO L158 Benchmark]: TraceAbstraction took 16334.64ms. Allocated memory was 142.6MB in the beginning and 209.7MB in the end (delta: 67.1MB). Free memory was 87.3MB in the beginning and 96.1MB in the end (delta: -8.7MB). Peak memory consumption was 59.1MB. Max. memory is 16.1GB. [2021-11-21 00:20:25,506 INFO L158 Benchmark]: Witness Printer took 6.07ms. Allocated memory is still 209.7MB. Free memory was 96.1MB in the beginning and 95.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:20:25,510 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.84ms. Allocated memory is still 98.6MB. Free memory is still 53.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 343.33ms. Allocated memory was 98.6MB in the beginning and 142.6MB in the end (delta: 44.0MB). Free memory was 64.2MB in the beginning and 115.9MB in the end (delta: -51.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.21ms. Allocated memory is still 142.6MB. Free memory was 115.3MB in the beginning and 113.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.21ms. Allocated memory is still 142.6MB. Free memory was 113.9MB in the beginning and 112.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 877.56ms. Allocated memory is still 142.6MB. Free memory was 112.5MB in the beginning and 88.0MB in the end (delta: 24.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 16334.64ms. Allocated memory was 142.6MB in the beginning and 209.7MB in the end (delta: 67.1MB). Free memory was 87.3MB in the beginning and 96.1MB in the end (delta: -8.7MB). Peak memory consumption was 59.1MB. Max. memory is 16.1GB. * Witness Printer took 6.07ms. Allocated memory is still 209.7MB. Free memory was 96.1MB in the beginning and 95.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 25]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 116, overapproximation of bitwiseAnd at line 96. Possible FailurePath: [L124] unsigned int a, b, r; [L126] a = __VERIFIER_nondet_uint() [L127] b = __VERIFIER_nondet_uint() [L129] CALL, EXPR mp_add(a, b) [L42] unsigned char a0, a1, a2, a3; [L43] unsigned char b0, b1, b2, b3; [L44] unsigned char r0, r1, r2, r3; [L45] unsigned short carry; [L46] unsigned short partial_sum; [L47] unsigned int r; [L48] unsigned char i; [L49] unsigned char na, nb; [L50] a0 = a [L51] a1 = a >> 8 [L52] a2 = a >> 16U [L53] a3 = a >> 24U [L54] b0 = b [L55] b1 = b >> 8U [L56] b2 = b >> 16U [L57] b3 = b >> 24U [L58] na = (unsigned char)4 [L59] COND FALSE !(a3 == (unsigned char)0) [L68] nb = (unsigned char)4 [L69] COND TRUE b3 == (unsigned char)0 [L70] nb = nb - 1 [L71] COND TRUE b2 == (unsigned char)0 [L72] nb = nb - 1 [L73] COND FALSE !(b1 == (unsigned char)0) [L78] carry = (unsigned short)0 [L79] i = (unsigned char)0 VAL [\old(a)=4261347328, \old(b)=65024, a=4261347328, a0=4261347328, a1=16645888, a2=65023, a3=253, b=65024, b0=4295032320, b1=16777470, b2=65536, b3=256, carry=0, i=0, na=4, nb=2] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 [L83] COND TRUE i < na [L84] COND TRUE i == (unsigned char)0 [L84] partial_sum = partial_sum + a0 [L85] COND FALSE !(i == (unsigned char)1) [L86] COND FALSE !(i == (unsigned char)2) [L87] COND FALSE !(i == (unsigned char)3) [L89] COND TRUE i < nb [L90] COND TRUE i == (unsigned char)0 [L90] partial_sum = partial_sum + b0 [L91] COND FALSE !(i == (unsigned char)1) [L92] COND FALSE !(i == (unsigned char)2) [L93] COND FALSE !(i == (unsigned char)3) [L95] COND FALSE !(partial_sum > ((unsigned char)254)) [L99] COND TRUE i == (unsigned char)0 [L99] r0 = (unsigned char)partial_sum [L100] COND FALSE !(i == (unsigned char)1) [L101] COND FALSE !(i == (unsigned char)2) [L102] COND FALSE !(i == (unsigned char)3) [L104] i = i + (unsigned char)1 VAL [\old(a)=4261347328, \old(b)=65024, a=4261347328, a0=4261347328, a1=16645888, a2=65023, a3=253, b=65024, b0=4295032320, b1=16777470, b2=65536, b3=256, carry=0, i=1, na=4, nb=2, partial_sum=0, r0=0, r1=0, r2=254, r3=254] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 [L83] COND TRUE i < na [L84] COND FALSE !(i == (unsigned char)0) [L85] COND TRUE i == (unsigned char)1 [L85] partial_sum = partial_sum + a1 [L86] COND FALSE !(i == (unsigned char)2) [L87] COND FALSE !(i == (unsigned char)3) [L89] COND TRUE i < nb [L90] COND FALSE !(i == (unsigned char)0) [L91] COND TRUE i == (unsigned char)1 [L91] partial_sum = partial_sum + b1 [L92] COND FALSE !(i == (unsigned char)2) [L93] COND FALSE !(i == (unsigned char)3) [L95] COND FALSE !(partial_sum > ((unsigned char)254)) [L99] COND FALSE !(i == (unsigned char)0) [L100] COND TRUE i == (unsigned char)1 [L100] r1 = (unsigned char)partial_sum [L101] COND FALSE !(i == (unsigned char)2) [L102] COND FALSE !(i == (unsigned char)3) [L104] i = i + (unsigned char)1 VAL [\old(a)=4261347328, \old(b)=65024, a=4261347328, a0=4261347328, a1=16645888, a2=65023, a3=253, b=65024, b0=4295032320, b1=16777470, b2=65536, b3=256, carry=0, i=2, na=4, nb=2, partial_sum=254, r0=0, r1=254, r2=254, r3=254] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 [L83] COND TRUE i < na [L84] COND FALSE !(i == (unsigned char)0) [L85] COND FALSE !(i == (unsigned char)1) [L86] COND TRUE i == (unsigned char)2 [L86] partial_sum = partial_sum + a2 [L87] COND FALSE !(i == (unsigned char)3) [L89] COND FALSE !(i < nb) [L95] COND TRUE partial_sum > ((unsigned char)254) [L96] partial_sum = partial_sum & ((unsigned char)255) [L97] carry = (unsigned short)1 [L99] COND FALSE !(i == (unsigned char)0) [L100] COND FALSE !(i == (unsigned char)1) [L101] COND TRUE i == (unsigned char)2 [L101] r2 = (unsigned char)partial_sum [L102] COND FALSE !(i == (unsigned char)3) [L104] i = i + (unsigned char)1 VAL [\old(a)=4261347328, \old(b)=65024, a=4261347328, a0=4261347328, a1=16645888, a2=65023, a3=253, b=65024, b0=4295032320, b1=16777470, b2=65536, b3=256, carry=1, i=3, na=4, nb=2, partial_sum=0, r0=0, r1=254, r2=0, r3=254] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 [L83] COND TRUE i < na [L84] COND FALSE !(i == (unsigned char)0) [L85] COND FALSE !(i == (unsigned char)1) [L86] COND FALSE !(i == (unsigned char)2) [L87] COND TRUE i == (unsigned char)3 [L87] partial_sum = partial_sum + a3 [L89] COND FALSE !(i < nb) [L95] COND FALSE !(partial_sum > ((unsigned char)254)) [L99] COND FALSE !(i == (unsigned char)0) [L100] COND FALSE !(i == (unsigned char)1) [L101] COND FALSE !(i == (unsigned char)2) [L102] COND TRUE i == (unsigned char)3 [L102] r3 = (unsigned char)partial_sum [L104] i = i + (unsigned char)1 VAL [\old(a)=4261347328, \old(b)=65024, a=4261347328, a0=4261347328, a1=16645888, a2=65023, a3=253, b=65024, b0=4295032320, b1=16777470, b2=65536, b3=256, carry=0, i=4, na=4, nb=2, partial_sum=254, r0=0, r1=254, r2=0, r3=254] [L80] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) VAL [\old(a)=4261347328, \old(b)=65024, a=4261347328, a0=4261347328, a1=16645888, a2=65023, a3=253, b=65024, b0=4295032320, b1=16777470, b2=65536, b3=256, carry=0, i=4, na=4, nb=2, partial_sum=254, r0=0, r1=254, r2=0, r3=254] [L107] COND FALSE !(i < (unsigned char)4) [L116] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L118] return r; [L129] RET, EXPR mp_add(a, b) [L129] r = mp_add(a, b) [L131] CALL __VERIFIER_assert(r == a + b) [L24] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L25] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 8 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 16.1s, OverallIterations: 3, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4 mSDsluCounter, 14 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 40 IncrementalHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 5 mSDtfsCounter, 40 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=2, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 19 ConstructedInterpolants, 0 QuantifiedInterpolants, 137 SizeOfPredicates, 1 NumberOfNonLiveVariables, 77 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-21 00:20:25,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/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_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7dfc9f1e1cbceb1807370dcac22a0449d857eff9a54bdefbc84178983a910e84 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:20:28,622 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:20:28,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:20:28,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:20:28,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:20:28,678 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:20:28,680 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:20:28,684 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:20:28,687 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:20:28,689 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:20:28,690 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:20:28,692 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:20:28,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:20:28,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:20:28,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:20:28,699 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:20:28,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:20:28,702 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:20:28,704 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:20:28,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:20:28,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:20:28,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:20:28,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:20:28,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:20:28,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:20:28,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:20:28,721 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:20:28,723 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:20:28,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:20:28,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:20:28,726 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:20:28,727 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:20:28,729 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:20:28,730 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:20:28,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:20:28,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:20:28,745 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:20:28,746 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:20:28,746 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:20:28,748 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:20:28,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:20:28,750 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-21 00:20:28,785 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:20:28,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:20:28,786 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:20:28,787 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:20:28,788 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:20:28,788 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:20:28,788 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:20:28,789 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:20:28,789 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:20:28,790 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:20:28,790 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:20:28,790 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:20:28,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:20:28,792 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:20:28,792 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:20:28,792 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:20:28,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:20:28,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:20:28,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:20:28,794 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 00:20:28,794 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 00:20:28,794 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:20:28,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:20:28,795 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:20:28,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:20:28,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:20:28,796 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 00:20:28,796 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:20:28,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:20:28,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:20:28,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:20:28,797 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:20:28,798 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 00:20:28,798 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 00:20:28,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:20:28,798 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:20:28,799 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:20:28,799 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7dfc9f1e1cbceb1807370dcac22a0449d857eff9a54bdefbc84178983a910e84 [2021-11-21 00:20:29,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:20:29,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:20:29,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:20:29,360 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:20:29,361 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:20:29,363 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/bitvector/byte_add-1.i [2021-11-21 00:20:29,457 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/data/303b920d1/1057219a8b8b4dd88e35b76bbb5defbe/FLAG237c45988 [2021-11-21 00:20:30,191 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:20:30,192 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/sv-benchmarks/c/bitvector/byte_add-1.i [2021-11-21 00:20:30,206 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/data/303b920d1/1057219a8b8b4dd88e35b76bbb5defbe/FLAG237c45988 [2021-11-21 00:20:30,503 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/data/303b920d1/1057219a8b8b4dd88e35b76bbb5defbe [2021-11-21 00:20:30,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:20:30,510 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:20:30,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:20:30,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:20:30,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:20:30,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:20:30" (1/1) ... [2021-11-21 00:20:30,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3286fa40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:30, skipping insertion in model container [2021-11-21 00:20:30,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:20:30" (1/1) ... [2021-11-21 00:20:30,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:20:30,581 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:20:30,779 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_5311a7a9-42dd-4248-9d9e-293241f5b6c1/sv-benchmarks/c/bitvector/byte_add-1.i[1166,1179] [2021-11-21 00:20:30,834 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:20:30,873 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:20:30,896 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_5311a7a9-42dd-4248-9d9e-293241f5b6c1/sv-benchmarks/c/bitvector/byte_add-1.i[1166,1179] [2021-11-21 00:20:30,966 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:20:31,009 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:20:31,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:31 WrapperNode [2021-11-21 00:20:31,010 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:20:31,012 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:20:31,012 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:20:31,012 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:20:31,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:31" (1/1) ... [2021-11-21 00:20:31,034 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:31" (1/1) ... [2021-11-21 00:20:31,066 INFO L137 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 124 [2021-11-21 00:20:31,067 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:20:31,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:20:31,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:20:31,068 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:20:31,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:31" (1/1) ... [2021-11-21 00:20:31,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:31" (1/1) ... [2021-11-21 00:20:31,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:31" (1/1) ... [2021-11-21 00:20:31,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:31" (1/1) ... [2021-11-21 00:20:31,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:31" (1/1) ... [2021-11-21 00:20:31,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:31" (1/1) ... [2021-11-21 00:20:31,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:31" (1/1) ... [2021-11-21 00:20:31,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:20:31,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:20:31,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:20:31,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:20:31,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:31" (1/1) ... [2021-11-21 00:20:31,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:20:31,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:20:31,156 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:20:31,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:20:31,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:20:31,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 00:20:31,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:20:31,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:20:31,315 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:20:31,317 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:20:31,682 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:20:31,691 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:20:31,692 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 00:20:31,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:20:31 BoogieIcfgContainer [2021-11-21 00:20:31,694 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:20:31,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:20:31,697 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:20:31,701 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:20:31,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:20:30" (1/3) ... [2021-11-21 00:20:31,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e26d0dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:20:31, skipping insertion in model container [2021-11-21 00:20:31,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:31" (2/3) ... [2021-11-21 00:20:31,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e26d0dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:20:31, skipping insertion in model container [2021-11-21 00:20:31,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:20:31" (3/3) ... [2021-11-21 00:20:31,705 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2021-11-21 00:20:31,712 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:20:31,713 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:20:31,798 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:20:31,820 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 [2021-11-21 00:20:31,821 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:20:31,851 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:31,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 00:20:31,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:31,860 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:20:31,862 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:31,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:31,871 INFO L85 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2021-11-21 00:20:31,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:20:31,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762572051] [2021-11-21 00:20:31,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:31,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:20:31,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:20:31,894 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:20:31,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 00:20:32,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:32,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-21 00:20:32,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:32,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:20:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:32,198 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:20:32,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762572051] [2021-11-21 00:20:32,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762572051] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:32,200 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:20:32,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 00:20:32,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370954540] [2021-11-21 00:20:32,204 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:32,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 00:20:32,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:20:32,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 00:20:32,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:20:32,261 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:32,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:32,294 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2021-11-21 00:20:32,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 00:20:32,298 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-21 00:20:32,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:32,318 INFO L225 Difference]: With dead ends: 57 [2021-11-21 00:20:32,318 INFO L226 Difference]: Without dead ends: 38 [2021-11-21 00:20:32,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:20:32,330 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:32,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:20:32,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-21 00:20:32,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-21 00:20:32,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:32,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2021-11-21 00:20:32,392 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2021-11-21 00:20:32,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:32,392 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2021-11-21 00:20:32,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:32,393 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2021-11-21 00:20:32,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 00:20:32,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:32,396 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:20:32,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:20:32,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:20:32,610 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:32,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:32,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2021-11-21 00:20:32,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:20:32,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87543380] [2021-11-21 00:20:32,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:32,615 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:20:32,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:20:32,621 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:20:32,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 00:20:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:32,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:20:32,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:32,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:20:32,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:32,893 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:20:32,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [87543380] [2021-11-21 00:20:32,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [87543380] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:32,895 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:20:32,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:20:32,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864295876] [2021-11-21 00:20:32,896 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:32,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:20:32,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:20:32,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:20:32,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:20:32,900 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:33,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:33,579 INFO L93 Difference]: Finished difference Result 172 states and 301 transitions. [2021-11-21 00:20:33,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:20:33,580 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-21 00:20:33,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:33,584 INFO L225 Difference]: With dead ends: 172 [2021-11-21 00:20:33,584 INFO L226 Difference]: Without dead ends: 144 [2021-11-21 00:20:33,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:20:33,587 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 226 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:33,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 170 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 00:20:33,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-21 00:20:33,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112. [2021-11-21 00:20:33,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.6486486486486487) internal successors, (183), 111 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:33,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 183 transitions. [2021-11-21 00:20:33,632 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 183 transitions. Word has length 12 [2021-11-21 00:20:33,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:33,633 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 183 transitions. [2021-11-21 00:20:33,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:33,634 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 183 transitions. [2021-11-21 00:20:33,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 00:20:33,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:33,635 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:20:33,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:20:33,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:20:33,851 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:33,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:33,852 INFO L85 PathProgramCache]: Analyzing trace with hash 583572890, now seen corresponding path program 1 times [2021-11-21 00:20:33,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:20:33,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1297707950] [2021-11-21 00:20:33,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:33,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:20:33,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:20:33,866 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:20:33,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 00:20:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:33,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:20:33,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:34,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:20:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:34,213 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:20:34,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1297707950] [2021-11-21 00:20:34,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1297707950] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:34,214 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:20:34,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-21 00:20:34,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036903612] [2021-11-21 00:20:34,215 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:34,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 00:20:34,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:20:34,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 00:20:34,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:20:34,224 INFO L87 Difference]: Start difference. First operand 112 states and 183 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:35,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:35,220 INFO L93 Difference]: Finished difference Result 345 states and 594 transitions. [2021-11-21 00:20:35,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 00:20:35,222 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-21 00:20:35,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:35,231 INFO L225 Difference]: With dead ends: 345 [2021-11-21 00:20:35,232 INFO L226 Difference]: Without dead ends: 300 [2021-11-21 00:20:35,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:20:35,238 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 925 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:35,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [925 Valid, 228 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 00:20:35,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-21 00:20:35,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 225. [2021-11-21 00:20:35,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.6383928571428572) internal successors, (367), 224 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:35,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 367 transitions. [2021-11-21 00:20:35,305 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 367 transitions. Word has length 14 [2021-11-21 00:20:35,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:35,305 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 367 transitions. [2021-11-21 00:20:35,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:35,311 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 367 transitions. [2021-11-21 00:20:35,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-21 00:20:35,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:35,322 INFO L514 BasicCegarLoop]: trace histogram [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 00:20:35,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:20:35,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:20:35,536 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:35,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:35,537 INFO L85 PathProgramCache]: Analyzing trace with hash -842586557, now seen corresponding path program 1 times [2021-11-21 00:20:35,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:20:35,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1109115330] [2021-11-21 00:20:35,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:35,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:20:35,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:20:35,540 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:20:35,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-21 00:20:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:35,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:20:35,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:35,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:20:35,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:35,828 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:20:35,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1109115330] [2021-11-21 00:20:35,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1109115330] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:35,829 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:20:35,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:20:35,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327850974] [2021-11-21 00:20:35,830 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:35,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:20:35,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:20:35,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:20:35,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:20:35,832 INFO L87 Difference]: Start difference. First operand 225 states and 367 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:36,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:36,276 INFO L93 Difference]: Finished difference Result 1018 states and 1671 transitions. [2021-11-21 00:20:36,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:20:36,277 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-21 00:20:36,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:36,285 INFO L225 Difference]: With dead ends: 1018 [2021-11-21 00:20:36,285 INFO L226 Difference]: Without dead ends: 818 [2021-11-21 00:20:36,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:20:36,289 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 209 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:36,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 187 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:20:36,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-11-21 00:20:36,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 467. [2021-11-21 00:20:36,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 1.53862660944206) internal successors, (717), 466 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:36,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 717 transitions. [2021-11-21 00:20:36,345 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 717 transitions. Word has length 26 [2021-11-21 00:20:36,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:36,346 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 717 transitions. [2021-11-21 00:20:36,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:36,347 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 717 transitions. [2021-11-21 00:20:36,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-21 00:20:36,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:36,352 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:20:36,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:20:36,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:20:36,566 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:36,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:36,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1924928046, now seen corresponding path program 1 times [2021-11-21 00:20:36,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:20:36,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501529912] [2021-11-21 00:20:36,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:36,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:20:36,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:20:36,572 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:20:36,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-21 00:20:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:36,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:20:36,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:36,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:36,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:20:37,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:37,143 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:20:37,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501529912] [2021-11-21 00:20:37,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501529912] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:37,144 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:20:37,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-21 00:20:37,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158613751] [2021-11-21 00:20:37,145 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:37,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 00:20:37,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:20:37,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 00:20:37,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:20:37,147 INFO L87 Difference]: Start difference. First operand 467 states and 717 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:37,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:37,932 INFO L93 Difference]: Finished difference Result 1528 states and 2404 transitions. [2021-11-21 00:20:37,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 00:20:37,933 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-21 00:20:37,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:37,942 INFO L225 Difference]: With dead ends: 1528 [2021-11-21 00:20:37,942 INFO L226 Difference]: Without dead ends: 1086 [2021-11-21 00:20:37,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:20:37,946 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 438 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:37,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 615 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 705 Invalid, 0 Unknown, 123 Unchecked, 0.7s Time] [2021-11-21 00:20:37,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-11-21 00:20:37,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 490. [2021-11-21 00:20:37,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 1.4969325153374233) internal successors, (732), 489 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:37,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 732 transitions. [2021-11-21 00:20:37,980 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 732 transitions. Word has length 28 [2021-11-21 00:20:37,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:37,980 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 732 transitions. [2021-11-21 00:20:37,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:37,981 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 732 transitions. [2021-11-21 00:20:37,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-21 00:20:37,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:37,983 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:20:38,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:20:38,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:20:38,197 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:38,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:38,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1604924270, now seen corresponding path program 1 times [2021-11-21 00:20:38,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:20:38,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034352089] [2021-11-21 00:20:38,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:38,199 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:20:38,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:20:38,200 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:20:38,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-21 00:20:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:38,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:20:38,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:38,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:38,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:20:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:38,564 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:20:38,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034352089] [2021-11-21 00:20:38,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034352089] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:38,565 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:20:38,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-21 00:20:38,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114000209] [2021-11-21 00:20:38,565 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:38,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 00:20:38,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:20:38,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 00:20:38,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:20:38,567 INFO L87 Difference]: Start difference. First operand 490 states and 732 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:39,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:39,237 INFO L93 Difference]: Finished difference Result 1425 states and 2205 transitions. [2021-11-21 00:20:39,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 00:20:39,238 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-21 00:20:39,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:39,247 INFO L225 Difference]: With dead ends: 1425 [2021-11-21 00:20:39,247 INFO L226 Difference]: Without dead ends: 1197 [2021-11-21 00:20:39,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:20:39,255 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1098 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1098 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:39,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1098 Valid, 407 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 00:20:39,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-11-21 00:20:39,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 954. [2021-11-21 00:20:39,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 1.459601259181532) internal successors, (1391), 953 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:39,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1391 transitions. [2021-11-21 00:20:39,337 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1391 transitions. Word has length 28 [2021-11-21 00:20:39,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:39,338 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 1391 transitions. [2021-11-21 00:20:39,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:39,338 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1391 transitions. [2021-11-21 00:20:39,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-21 00:20:39,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:39,341 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-11-21 00:20:39,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:20:39,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:20:39,555 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:39,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:39,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1970910225, now seen corresponding path program 1 times [2021-11-21 00:20:39,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:20:39,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361611971] [2021-11-21 00:20:39,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:39,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:20:39,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:20:39,558 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:20:39,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-21 00:20:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:39,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:20:39,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:39,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:20:39,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:39,821 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:20:39,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361611971] [2021-11-21 00:20:39,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361611971] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:39,822 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:20:39,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-21 00:20:39,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14018690] [2021-11-21 00:20:39,822 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:39,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:20:39,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:20:39,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:20:39,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:20:39,826 INFO L87 Difference]: Start difference. First operand 954 states and 1391 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:39,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:40,000 INFO L93 Difference]: Finished difference Result 2054 states and 2999 transitions. [2021-11-21 00:20:40,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:20:40,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-21 00:20:40,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:40,011 INFO L225 Difference]: With dead ends: 2054 [2021-11-21 00:20:40,011 INFO L226 Difference]: Without dead ends: 1211 [2021-11-21 00:20:40,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:20:40,014 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 39 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:40,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 64 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:20:40,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2021-11-21 00:20:40,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1077. [2021-11-21 00:20:40,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1076 states have (on average 1.3986988847583643) internal successors, (1505), 1076 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:40,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 1505 transitions. [2021-11-21 00:20:40,071 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 1505 transitions. Word has length 31 [2021-11-21 00:20:40,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:40,071 INFO L470 AbstractCegarLoop]: Abstraction has 1077 states and 1505 transitions. [2021-11-21 00:20:40,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:40,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 1505 transitions. [2021-11-21 00:20:40,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-21 00:20:40,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:40,077 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-11-21 00:20:40,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-21 00:20:40,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:20:40,292 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:40,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:40,292 INFO L85 PathProgramCache]: Analyzing trace with hash 2075339537, now seen corresponding path program 1 times [2021-11-21 00:20:40,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:20:40,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303816603] [2021-11-21 00:20:40,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:40,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:20:40,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:20:40,295 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:20:40,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-21 00:20:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:40,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:20:40,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:40,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:20:40,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:40,698 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:20:40,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303816603] [2021-11-21 00:20:40,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303816603] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:20:40,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [78304938] [2021-11-21 00:20:40,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:40,699 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:20:40,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:20:40,703 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:20:40,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-21 00:20:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:40,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:20:40,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:40,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:20:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:40,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [78304938] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:40,949 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:20:40,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 12 [2021-11-21 00:20:40,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790232038] [2021-11-21 00:20:40,950 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:40,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:20:40,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:20:40,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:20:40,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:20:40,952 INFO L87 Difference]: Start difference. First operand 1077 states and 1505 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:40,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:40,993 INFO L93 Difference]: Finished difference Result 1513 states and 2098 transitions. [2021-11-21 00:20:40,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:20:40,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-21 00:20:40,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:41,005 INFO L225 Difference]: With dead ends: 1513 [2021-11-21 00:20:41,005 INFO L226 Difference]: Without dead ends: 1386 [2021-11-21 00:20:41,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:20:41,007 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 4 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:41,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 182 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:20:41,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2021-11-21 00:20:41,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1316. [2021-11-21 00:20:41,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 1315 states have (on average 1.3863117870722435) internal successors, (1823), 1315 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:41,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 1823 transitions. [2021-11-21 00:20:41,091 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 1823 transitions. Word has length 31 [2021-11-21 00:20:41,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:41,092 INFO L470 AbstractCegarLoop]: Abstraction has 1316 states and 1823 transitions. [2021-11-21 00:20:41,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:41,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 1823 transitions. [2021-11-21 00:20:41,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-21 00:20:41,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:41,095 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-11-21 00:20:41,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-21 00:20:41,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:20:41,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:20:41,498 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:41,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:41,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1961462321, now seen corresponding path program 1 times [2021-11-21 00:20:41,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:20:41,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147939475] [2021-11-21 00:20:41,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:41,499 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:20:41,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:20:41,500 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:20:41,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-21 00:20:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:41,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:20:41,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:41,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:20:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:41,889 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:20:41,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147939475] [2021-11-21 00:20:41,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147939475] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:20:41,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1462400560] [2021-11-21 00:20:41,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:41,890 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:20:41,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:20:41,894 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:20:41,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-21 00:20:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:41,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:20:41,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:42,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:20:42,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:42,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1462400560] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:20:42,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599567507] [2021-11-21 00:20:42,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:42,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:20:42,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:20:42,321 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:20:42,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 00:20:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:42,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:20:42,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:42,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:20:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:42,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599567507] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:20:42,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:20:42,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 4, 4] total 14 [2021-11-21 00:20:42,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019760218] [2021-11-21 00:20:42,605 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:20:42,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 00:20:42,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:20:42,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 00:20:42,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:20:42,608 INFO L87 Difference]: Start difference. First operand 1316 states and 1823 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:45,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:45,094 INFO L93 Difference]: Finished difference Result 5723 states and 8338 transitions. [2021-11-21 00:20:45,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-21 00:20:45,095 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-21 00:20:45,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:45,126 INFO L225 Difference]: With dead ends: 5723 [2021-11-21 00:20:45,126 INFO L226 Difference]: Without dead ends: 4370 [2021-11-21 00:20:45,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=456, Invalid=1104, Unknown=0, NotChecked=0, Total=1560 [2021-11-21 00:20:45,135 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 997 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 1518 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 1758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 1518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:45,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [997 Valid, 312 Invalid, 1758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 1518 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-21 00:20:45,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4370 states. [2021-11-21 00:20:45,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4370 to 2707. [2021-11-21 00:20:45,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2707 states, 2706 states have (on average 1.3869179600886918) internal successors, (3753), 2706 states have internal predecessors, (3753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:45,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 3753 transitions. [2021-11-21 00:20:45,319 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 3753 transitions. Word has length 31 [2021-11-21 00:20:45,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:45,320 INFO L470 AbstractCegarLoop]: Abstraction has 2707 states and 3753 transitions. [2021-11-21 00:20:45,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:45,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 3753 transitions. [2021-11-21 00:20:45,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-21 00:20:45,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:45,325 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:20:45,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-21 00:20:45,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-21 00:20:45,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-21 00:20:45,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:20:45,941 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:45,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:45,941 INFO L85 PathProgramCache]: Analyzing trace with hash 170049128, now seen corresponding path program 1 times [2021-11-21 00:20:45,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:20:45,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897503064] [2021-11-21 00:20:45,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:45,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:20:45,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:20:45,944 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:20:45,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-21 00:20:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:46,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:20:46,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 00:20:46,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:20:46,707 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 00:20:46,707 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:20:46,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897503064] [2021-11-21 00:20:46,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897503064] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 00:20:46,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:20:46,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-21 00:20:46,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070380448] [2021-11-21 00:20:46,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:46,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:20:46,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:20:46,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:20:46,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:20:46,709 INFO L87 Difference]: Start difference. First operand 2707 states and 3753 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:46,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:46,831 INFO L93 Difference]: Finished difference Result 3458 states and 4763 transitions. [2021-11-21 00:20:46,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:20:46,832 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-21 00:20:46,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:46,857 INFO L225 Difference]: With dead ends: 3458 [2021-11-21 00:20:46,857 INFO L226 Difference]: Without dead ends: 3430 [2021-11-21 00:20:46,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:20:46,859 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 79 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:46,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 235 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2021-11-21 00:20:46,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3430 states. [2021-11-21 00:20:46,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3430 to 2716. [2021-11-21 00:20:46,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 1.3860036832412523) internal successors, (3763), 2715 states have internal predecessors, (3763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:47,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 3763 transitions. [2021-11-21 00:20:47,032 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 3763 transitions. Word has length 50 [2021-11-21 00:20:47,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:47,032 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 3763 transitions. [2021-11-21 00:20:47,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:47,033 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 3763 transitions. [2021-11-21 00:20:47,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-21 00:20:47,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:47,038 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:20:47,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-21 00:20:47,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:20:47,254 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:47,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:47,255 INFO L85 PathProgramCache]: Analyzing trace with hash 945650591, now seen corresponding path program 1 times [2021-11-21 00:20:47,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:20:47,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452743821] [2021-11-21 00:20:47,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:47,256 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:20:47,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:20:47,257 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:20:47,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-21 00:20:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:47,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-21 00:20:47,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:50,661 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:20:50,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:20:53,440 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:20:53,440 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:20:53,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452743821] [2021-11-21 00:20:53,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [452743821] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:20:53,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [914464665] [2021-11-21 00:20:53,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:53,442 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:20:53,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:20:53,450 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:20:53,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-21 00:20:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:53,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-21 00:20:53,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:20:55,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:20:56,925 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:20:56,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [914464665] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:20:56,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853792204] [2021-11-21 00:20:56,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:56,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:20:56,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:20:56,942 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:20:56,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-21 00:20:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:57,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-21 00:20:57,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:20:58,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:20:59,563 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:20:59,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853792204] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:20:59,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:20:59,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20, 20, 20, 20] total 44 [2021-11-21 00:20:59,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634667054] [2021-11-21 00:20:59,564 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:20:59,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-21 00:20:59,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:20:59,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-21 00:20:59,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1694, Unknown=0, NotChecked=0, Total=1892 [2021-11-21 00:20:59,567 INFO L87 Difference]: Start difference. First operand 2716 states and 3763 transitions. Second operand has 44 states, 44 states have (on average 2.772727272727273) internal successors, (122), 44 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:21:32,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:21:32,607 INFO L93 Difference]: Finished difference Result 5546 states and 7555 transitions. [2021-11-21 00:21:32,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-21 00:21:32,608 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.772727272727273) internal successors, (122), 44 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-21 00:21:32,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:21:32,645 INFO L225 Difference]: With dead ends: 5546 [2021-11-21 00:21:32,645 INFO L226 Difference]: Without dead ends: 5128 [2021-11-21 00:21:32,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3771 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=3761, Invalid=12751, Unknown=0, NotChecked=0, Total=16512 [2021-11-21 00:21:32,655 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 1872 mSDsluCounter, 4483 mSDsCounter, 0 mSdLazyCounter, 9192 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1872 SdHoareTripleChecker+Valid, 4730 SdHoareTripleChecker+Invalid, 9486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 9192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:21:32,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1872 Valid, 4730 Invalid, 9486 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [294 Valid, 9192 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time] [2021-11-21 00:21:32,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5128 states. [2021-11-21 00:21:32,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5128 to 3507. [2021-11-21 00:21:32,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3507 states, 3506 states have (on average 1.3739304050199659) internal successors, (4817), 3506 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:21:32,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3507 states to 3507 states and 4817 transitions. [2021-11-21 00:21:32,910 INFO L78 Accepts]: Start accepts. Automaton has 3507 states and 4817 transitions. Word has length 51 [2021-11-21 00:21:32,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:21:32,911 INFO L470 AbstractCegarLoop]: Abstraction has 3507 states and 4817 transitions. [2021-11-21 00:21:32,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.772727272727273) internal successors, (122), 44 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:21:32,911 INFO L276 IsEmpty]: Start isEmpty. Operand 3507 states and 4817 transitions. [2021-11-21 00:21:32,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-21 00:21:32,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:21:32,916 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:21:32,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-21 00:21:33,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-21 00:21:33,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-21 00:21:33,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:21:33,531 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:21:33,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:21:33,532 INFO L85 PathProgramCache]: Analyzing trace with hash -65466659, now seen corresponding path program 1 times [2021-11-21 00:21:33,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:21:33,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434354694] [2021-11-21 00:21:33,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:21:33,533 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:21:33,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:21:33,534 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:21:33,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-21 00:21:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:21:33,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:21:33,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:21:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:21:33,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:21:33,937 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:21:33,937 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:21:33,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434354694] [2021-11-21 00:21:33,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434354694] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:21:33,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [978821635] [2021-11-21 00:21:33,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:21:33,938 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:21:33,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:21:33,939 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:21:33,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-21 00:21:34,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:21:34,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:21:34,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:21:34,204 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:21:34,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:21:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:21:34,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [978821635] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:21:34,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919515212] [2021-11-21 00:21:34,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:21:34,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:21:34,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:21:34,354 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:21:34,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-21 00:21:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:21:34,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:21:34,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:21:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:21:34,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:21:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:21:34,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919515212] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:21:34,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:21:34,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8, 5, 5, 4] total 12 [2021-11-21 00:21:34,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553464282] [2021-11-21 00:21:34,672 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:21:34,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 00:21:34,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:21:34,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 00:21:34,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:21:34,675 INFO L87 Difference]: Start difference. First operand 3507 states and 4817 transitions. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:21:35,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:21:35,191 INFO L93 Difference]: Finished difference Result 6449 states and 8805 transitions. [2021-11-21 00:21:35,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 00:21:35,192 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-21 00:21:35,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:21:35,220 INFO L225 Difference]: With dead ends: 6449 [2021-11-21 00:21:35,220 INFO L226 Difference]: Without dead ends: 4043 [2021-11-21 00:21:35,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 288 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-11-21 00:21:35,226 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 171 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:21:35,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 272 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 350 Invalid, 0 Unknown, 186 Unchecked, 0.3s Time] [2021-11-21 00:21:35,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4043 states. [2021-11-21 00:21:35,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4043 to 3526. [2021-11-21 00:21:35,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3526 states, 3525 states have (on average 1.3455319148936171) internal successors, (4743), 3525 states have internal predecessors, (4743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:21:35,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 4743 transitions. [2021-11-21 00:21:35,452 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 4743 transitions. Word has length 51 [2021-11-21 00:21:35,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:21:35,453 INFO L470 AbstractCegarLoop]: Abstraction has 3526 states and 4743 transitions. [2021-11-21 00:21:35,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:21:35,453 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 4743 transitions. [2021-11-21 00:21:35,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-21 00:21:35,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:21:35,458 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:21:35,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-21 00:21:35,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-21 00:21:35,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-21 00:21:36,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:21:36,073 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:21:36,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:21:36,074 INFO L85 PathProgramCache]: Analyzing trace with hash 592562209, now seen corresponding path program 1 times [2021-11-21 00:21:36,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:21:36,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298004132] [2021-11-21 00:21:36,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:21:36,075 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:21:36,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:21:36,076 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:21:36,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-21 00:21:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:21:36,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:21:36,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:21:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 00:21:36,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:21:36,728 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 00:21:36,728 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:21:36,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298004132] [2021-11-21 00:21:36,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298004132] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 00:21:36,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:21:36,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-21 00:21:36,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056990564] [2021-11-21 00:21:36,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:21:36,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:21:36,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:21:36,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:21:36,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:21:36,731 INFO L87 Difference]: Start difference. First operand 3526 states and 4743 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:21:36,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:21:36,930 INFO L93 Difference]: Finished difference Result 3783 states and 5039 transitions. [2021-11-21 00:21:36,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:21:36,931 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-21 00:21:36,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:21:36,959 INFO L225 Difference]: With dead ends: 3783 [2021-11-21 00:21:36,960 INFO L226 Difference]: Without dead ends: 3745 [2021-11-21 00:21:36,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:21:36,962 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 149 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:21:36,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 463 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 174 Unchecked, 0.1s Time] [2021-11-21 00:21:36,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3745 states. [2021-11-21 00:21:37,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3745 to 3535. [2021-11-21 00:21:37,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3534 states have (on average 1.3449349179400114) internal successors, (4753), 3534 states have internal predecessors, (4753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:21:37,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 4753 transitions. [2021-11-21 00:21:37,177 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 4753 transitions. Word has length 51 [2021-11-21 00:21:37,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:21:37,179 INFO L470 AbstractCegarLoop]: Abstraction has 3535 states and 4753 transitions. [2021-11-21 00:21:37,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:21:37,179 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 4753 transitions. [2021-11-21 00:21:37,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-21 00:21:37,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:21:37,184 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:21:37,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-21 00:21:37,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:21:37,399 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:21:37,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:21:37,407 INFO L85 PathProgramCache]: Analyzing trace with hash -969851738, now seen corresponding path program 1 times [2021-11-21 00:21:37,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:21:37,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493882152] [2021-11-21 00:21:37,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:21:37,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:21:37,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:21:37,410 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:21:37,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-21 00:21:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:21:37,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:21:37,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:21:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 00:21:37,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:21:38,016 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 00:21:38,016 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:21:38,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493882152] [2021-11-21 00:21:38,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493882152] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 00:21:38,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:21:38,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-21 00:21:38,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994450517] [2021-11-21 00:21:38,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:21:38,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:21:38,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:21:38,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:21:38,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:21:38,021 INFO L87 Difference]: Start difference. First operand 3535 states and 4753 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:21:38,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:21:38,242 INFO L93 Difference]: Finished difference Result 4367 states and 5864 transitions. [2021-11-21 00:21:38,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:21:38,243 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-21 00:21:38,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:21:38,268 INFO L225 Difference]: With dead ends: 4367 [2021-11-21 00:21:38,269 INFO L226 Difference]: Without dead ends: 3615 [2021-11-21 00:21:38,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:21:38,273 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 115 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:21:38,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 292 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2021-11-21 00:21:38,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3615 states. [2021-11-21 00:21:38,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3615 to 3535. [2021-11-21 00:21:38,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3534 states have (on average 1.3432371250707413) internal successors, (4747), 3534 states have internal predecessors, (4747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:21:38,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 4747 transitions. [2021-11-21 00:21:38,459 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 4747 transitions. Word has length 53 [2021-11-21 00:21:38,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:21:38,460 INFO L470 AbstractCegarLoop]: Abstraction has 3535 states and 4747 transitions. [2021-11-21 00:21:38,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:21:38,460 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 4747 transitions. [2021-11-21 00:21:38,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-21 00:21:38,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:21:38,466 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:21:38,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-21 00:21:38,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:21:38,679 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:21:38,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:21:38,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1950719985, now seen corresponding path program 1 times [2021-11-21 00:21:38,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:21:38,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669369835] [2021-11-21 00:21:38,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:21:38,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:21:38,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:21:38,682 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:21:38,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-21 00:21:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:21:38,744 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 00:21:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:21:38,875 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-21 00:21:38,876 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 00:21:38,877 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-21 00:21:38,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-21 00:21:39,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:21:39,099 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:21:39,102 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 00:21:39,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 12:21:39 BoogieIcfgContainer [2021-11-21 00:21:39,202 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 00:21:39,203 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 00:21:39,203 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 00:21:39,204 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 00:21:39,204 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:20:31" (3/4) ... [2021-11-21 00:21:39,207 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-21 00:21:39,336 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-21 00:21:39,339 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 00:21:39,340 INFO L158 Benchmark]: Toolchain (without parser) took 68829.77ms. Allocated memory was 58.7MB in the beginning and 209.7MB in the end (delta: 151.0MB). Free memory was 37.8MB in the beginning and 90.1MB in the end (delta: -52.3MB). Peak memory consumption was 99.4MB. Max. memory is 16.1GB. [2021-11-21 00:21:39,341 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 58.7MB. Free memory was 40.1MB in the beginning and 40.0MB in the end (delta: 44.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:21:39,341 INFO L158 Benchmark]: CACSL2BoogieTranslator took 495.72ms. Allocated memory was 58.7MB in the beginning and 79.7MB in the end (delta: 21.0MB). Free memory was 37.6MB in the beginning and 63.3MB in the end (delta: -25.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-21 00:21:39,344 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.43ms. Allocated memory is still 79.7MB. Free memory was 63.0MB in the beginning and 61.2MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:21:39,344 INFO L158 Benchmark]: Boogie Preprocessor took 42.47ms. Allocated memory is still 79.7MB. Free memory was 61.2MB in the beginning and 59.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:21:39,345 INFO L158 Benchmark]: RCFGBuilder took 583.33ms. Allocated memory is still 79.7MB. Free memory was 59.8MB in the beginning and 47.0MB in the end (delta: 12.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-21 00:21:39,345 INFO L158 Benchmark]: TraceAbstraction took 67505.80ms. Allocated memory was 79.7MB in the beginning and 209.7MB in the end (delta: 130.0MB). Free memory was 46.3MB in the beginning and 96.4MB in the end (delta: -50.1MB). Peak memory consumption was 81.3MB. Max. memory is 16.1GB. [2021-11-21 00:21:39,346 INFO L158 Benchmark]: Witness Printer took 136.10ms. Allocated memory is still 209.7MB. Free memory was 96.4MB in the beginning and 90.1MB in the end (delta: 6.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 00:21:39,349 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 58.7MB. Free memory was 40.1MB in the beginning and 40.0MB in the end (delta: 44.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 495.72ms. Allocated memory was 58.7MB in the beginning and 79.7MB in the end (delta: 21.0MB). Free memory was 37.6MB in the beginning and 63.3MB in the end (delta: -25.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.43ms. Allocated memory is still 79.7MB. Free memory was 63.0MB in the beginning and 61.2MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 42.47ms. Allocated memory is still 79.7MB. Free memory was 61.2MB in the beginning and 59.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 583.33ms. Allocated memory is still 79.7MB. Free memory was 59.8MB in the beginning and 47.0MB in the end (delta: 12.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 67505.80ms. Allocated memory was 79.7MB in the beginning and 209.7MB in the end (delta: 130.0MB). Free memory was 46.3MB in the beginning and 96.4MB in the end (delta: -50.1MB). Peak memory consumption was 81.3MB. Max. memory is 16.1GB. * Witness Printer took 136.10ms. Allocated memory is still 209.7MB. Free memory was 96.4MB in the beginning and 90.1MB in the end (delta: 6.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 25]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L124] unsigned int a, b, r; [L126] a = __VERIFIER_nondet_uint() [L127] b = __VERIFIER_nondet_uint() [L129] CALL, EXPR mp_add(a, b) [L42] unsigned char a0, a1, a2, a3; [L43] unsigned char b0, b1, b2, b3; [L44] unsigned char r0, r1, r2, r3; [L45] unsigned short carry; [L46] unsigned short partial_sum; [L47] unsigned int r; [L48] unsigned char i; [L49] unsigned char na, nb; [L50] a0 = a [L51] a1 = a >> 8 [L52] a2 = a >> 16U [L53] a3 = a >> 24U [L54] b0 = b [L55] b1 = b >> 8U [L56] b2 = b >> 16U [L57] b3 = b >> 24U [L58] na = (unsigned char)4 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, na=4] [L59] COND TRUE a3 == (unsigned char)0 [L60] na = na - 1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, na=3] [L61] COND TRUE a2 == (unsigned char)0 [L62] na = na - 1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, na=2] [L63] COND TRUE a1 == (unsigned char)0 [L64] na = na - 1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, na=1] [L68] nb = (unsigned char)4 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, na=1, nb=4] [L69] COND TRUE b3 == (unsigned char)0 [L70] nb = nb - 1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, na=1, nb=3] [L71] COND TRUE b2 == (unsigned char)0 [L72] nb = nb - 1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, na=1, nb=2] [L73] COND TRUE b1 == (unsigned char)0 [L74] nb = nb - 1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, na=1, nb=1] [L78] carry = (unsigned short)0 [L79] i = (unsigned char)0 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L83] COND TRUE i < na VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L84] COND TRUE i == (unsigned char)0 [L84] partial_sum = partial_sum + a0 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L85] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L86] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L87] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L89] COND TRUE i < nb VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L90] COND TRUE i == (unsigned char)0 [L90] partial_sum = partial_sum + b0 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=255] [L91] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=255] [L92] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=255] [L93] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=255] [L95] COND TRUE partial_sum > ((unsigned char)254) [L96] partial_sum = partial_sum & ((unsigned char)255) [L97] carry = (unsigned short)1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255] [L99] COND TRUE i == (unsigned char)0 [L99] r0 = (unsigned char)partial_sum VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255, r0=-1] [L100] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255, r0=-1] [L101] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255, r0=-1] [L102] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255, r0=-1] [L104] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=1, i=1, na=1, nb=1, partial_sum=255, r0=-1] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L83] COND FALSE !(i < na) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L89] COND FALSE !(i < nb) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L95] COND FALSE !(partial_sum > ((unsigned char)254)) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L99] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L100] COND TRUE i == (unsigned char)1 [L100] r1 = (unsigned char)partial_sum VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L101] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L102] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L104] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L80] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L107] COND TRUE i < (unsigned char)4 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L108] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L109] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L110] COND TRUE i == (unsigned char)2 [L110] r2 = (unsigned char)0 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L111] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L113] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L107] COND TRUE i < (unsigned char)4 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L108] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L109] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L110] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L111] COND TRUE i == (unsigned char)3 [L111] r3 = (unsigned char)0 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0, r3=0] [L113] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=4, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0, r3=0] [L107] COND FALSE !(i < (unsigned char)4) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=4, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0, r3=0] [L116] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L118] return r; VAL [\old(a)=0, \old(b)=255, \result=511, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=4, na=1, nb=1, partial_sum=1, r=511, r0=-1, r1=1, r2=0, r3=0] [L129] RET, EXPR mp_add(a, b) [L129] r = mp_add(a, b) [L131] CALL __VERIFIER_assert(r == a + b) [L24] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L25] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 67.3s, OverallIterations: 15, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 40.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6322 SdHoareTripleChecker+Valid, 19.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6322 mSDsluCounter, 8225 SdHoareTripleChecker+Invalid, 16.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 559 IncrementalHoareTripleChecker+Unchecked, 6957 mSDsCounter, 979 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13626 IncrementalHoareTripleChecker+Invalid, 15164 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 979 mSolverCounterUnsat, 1268 mSDtfsCounter, 13626 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1634 GetRequests, 1350 SyntacticMatches, 13 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4426 ImplicationChecksByTransitivity, 24.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3535occurred in iteration=13, InterpolantAutomatonStates: 217, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.7s AutomataMinimizationTime, 14 MinimizatonAttempts, 6306 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 18.2s InterpolantComputationTime, 820 NumberOfCodeBlocks, 820 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 1490 ConstructedInterpolants, 80 QuantifiedInterpolants, 17083 SizeOfPredicates, 103 NumberOfNonLiveVariables, 1586 ConjunctsInSsa, 183 ConjunctsInUnsatCore, 42 InterpolantComputations, 19 PerfectInterpolantSequences, 309/408 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-21 00:21:39,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5311a7a9-42dd-4248-9d9e-293241f5b6c1/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE