./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan --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 2d0dd826da977145676f85980fecf0ec40390b47 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan --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 2d0dd826da977145676f85980fecf0ec40390b47 .............................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 08:51:31,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 08:51:31,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 08:51:31,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 08:51:31,409 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 08:51:31,410 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 08:51:31,412 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 08:51:31,414 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 08:51:31,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 08:51:31,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 08:51:31,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 08:51:31,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 08:51:31,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 08:51:31,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 08:51:31,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 08:51:31,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 08:51:31,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 08:51:31,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 08:51:31,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 08:51:31,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 08:51:31,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 08:51:31,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 08:51:31,430 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 08:51:31,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 08:51:31,433 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 08:51:31,433 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 08:51:31,434 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 08:51:31,434 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 08:51:31,435 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 08:51:31,436 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 08:51:31,436 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 08:51:31,436 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 08:51:31,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 08:51:31,438 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 08:51:31,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 08:51:31,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 08:51:31,439 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 08:51:31,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 08:51:31,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 08:51:31,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 08:51:31,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 08:51:31,441 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 08:51:31,459 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 08:51:31,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 08:51:31,460 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 08:51:31,460 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 08:51:31,460 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 08:51:31,460 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 08:51:31,460 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 08:51:31,460 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 08:51:31,461 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 08:51:31,461 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 08:51:31,461 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 08:51:31,461 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 08:51:31,461 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 08:51:31,461 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 08:51:31,461 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 08:51:31,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 08:51:31,462 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 08:51:31,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 08:51:31,462 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 08:51:31,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 08:51:31,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 08:51:31,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 08:51:31,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 08:51:31,463 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 08:51:31,463 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 08:51:31,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 08:51:31,463 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 08:51:31,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 08:51:31,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 08:51:31,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 08:51:31,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:51:31,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 08:51:31,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 08:51:31,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 08:51:31,464 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 08:51:31,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 08:51:31,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 08:51:31,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 08:51:31,465 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 08:51:31,465 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-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d0dd826da977145676f85980fecf0ec40390b47 [2020-12-09 08:51:31,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 08:51:31,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 08:51:31,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 08:51:31,652 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 08:51:31,652 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 08:51:31,653 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i [2020-12-09 08:51:31,696 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/data/77afb7135/eb563b7f9b1e416da59caff2a2c8c7b9/FLAG5be3f96c7 [2020-12-09 08:51:32,075 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 08:51:32,075 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i [2020-12-09 08:51:32,079 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/data/77afb7135/eb563b7f9b1e416da59caff2a2c8c7b9/FLAG5be3f96c7 [2020-12-09 08:51:32,090 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/data/77afb7135/eb563b7f9b1e416da59caff2a2c8c7b9 [2020-12-09 08:51:32,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 08:51:32,093 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 08:51:32,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 08:51:32,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 08:51:32,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 08:51:32,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:51:32" (1/1) ... [2020-12-09 08:51:32,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6380a493 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:51:32, skipping insertion in model container [2020-12-09 08:51:32,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:51:32" (1/1) ... [2020-12-09 08:51:32,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 08:51:32,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 08:51:32,236 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i[951,964] [2020-12-09 08:51:32,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:51:32,256 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 08:51:32,269 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i[951,964] [2020-12-09 08:51:32,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:51:32,284 INFO L208 MainTranslator]: Completed translation [2020-12-09 08:51:32,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:51:32 WrapperNode [2020-12-09 08:51:32,284 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 08:51:32,285 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 08:51:32,285 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 08:51:32,285 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 08:51:32,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:51:32" (1/1) ... [2020-12-09 08:51:32,298 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:51:32" (1/1) ... [2020-12-09 08:51:32,315 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 08:51:32,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 08:51:32,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 08:51:32,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 08:51:32,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:51:32" (1/1) ... [2020-12-09 08:51:32,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:51:32" (1/1) ... [2020-12-09 08:51:32,326 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:51:32" (1/1) ... [2020-12-09 08:51:32,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:51:32" (1/1) ... [2020-12-09 08:51:32,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:51:32" (1/1) ... [2020-12-09 08:51:32,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:51:32" (1/1) ... [2020-12-09 08:51:32,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:51:32" (1/1) ... [2020-12-09 08:51:32,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 08:51:32,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 08:51:32,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 08:51:32,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 08:51:32,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:51:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:51:32,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 08:51:32,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 08:51:32,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 08:51:32,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 08:51:32,599 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 08:51:32,599 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-09 08:51:32,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:51:32 BoogieIcfgContainer [2020-12-09 08:51:32,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 08:51:32,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 08:51:32,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 08:51:32,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 08:51:32,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:51:32" (1/3) ... [2020-12-09 08:51:32,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@249162b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:51:32, skipping insertion in model container [2020-12-09 08:51:32,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:51:32" (2/3) ... [2020-12-09 08:51:32,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@249162b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:51:32, skipping insertion in model container [2020-12-09 08:51:32,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:51:32" (3/3) ... [2020-12-09 08:51:32,609 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound1.i [2020-12-09 08:51:32,623 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 08:51:32,625 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-09 08:51:32,634 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-09 08:51:32,657 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 08:51:32,657 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 08:51:32,657 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 08:51:32,657 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 08:51:32,657 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 08:51:32,657 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 08:51:32,657 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 08:51:32,658 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 08:51:32,667 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-12-09 08:51:32,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 08:51:32,672 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:51:32,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 08:51:32,673 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:51:32,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:51:32,679 INFO L82 PathProgramCache]: Analyzing trace with hash 104004450, now seen corresponding path program 1 times [2020-12-09 08:51:32,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:51:32,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971532301] [2020-12-09 08:51:32,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:51:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:51:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:51:32,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971532301] [2020-12-09 08:51:32,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:51:32,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 08:51:32,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859204650] [2020-12-09 08:51:32,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 08:51:32,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:51:32,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 08:51:32,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 08:51:32,841 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2020-12-09 08:51:32,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:51:32,854 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2020-12-09 08:51:32,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 08:51:32,855 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-12-09 08:51:32,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:51:32,860 INFO L225 Difference]: With dead ends: 25 [2020-12-09 08:51:32,860 INFO L226 Difference]: Without dead ends: 12 [2020-12-09 08:51:32,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 08:51:32,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-09 08:51:32,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-09 08:51:32,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-09 08:51:32,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-09 08:51:32,884 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 5 [2020-12-09 08:51:32,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:51:32,884 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-09 08:51:32,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 08:51:32,884 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-09 08:51:32,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 08:51:32,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:51:32,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 08:51:32,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 08:51:32,885 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:51:32,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:51:32,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1128477837, now seen corresponding path program 1 times [2020-12-09 08:51:32,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:51:32,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204760510] [2020-12-09 08:51:32,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:51:32,898 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 08:51:32,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1699667419] [2020-12-09 08:51:32,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:51:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:51:32,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-09 08:51:32,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:51:33,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:51:33,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:51:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:51:33,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204760510] [2020-12-09 08:51:33,079 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:51:33,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699667419] [2020-12-09 08:51:33,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:51:33,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2020-12-09 08:51:33,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280098316] [2020-12-09 08:51:33,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 08:51:33,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:51:33,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 08:51:33,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-09 08:51:33,082 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 8 states. [2020-12-09 08:51:33,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:51:33,264 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-12-09 08:51:33,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 08:51:33,265 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2020-12-09 08:51:33,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:51:33,265 INFO L225 Difference]: With dead ends: 33 [2020-12-09 08:51:33,265 INFO L226 Difference]: Without dead ends: 25 [2020-12-09 08:51:33,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-09 08:51:33,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-09 08:51:33,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-12-09 08:51:33,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 08:51:33,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-12-09 08:51:33,272 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 6 [2020-12-09 08:51:33,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:51:33,272 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-12-09 08:51:33,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 08:51:33,273 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-12-09 08:51:33,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 08:51:33,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:51:33,273 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2020-12-09 08:51:33,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 08:51:33,476 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:51:33,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:51:33,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1710175895, now seen corresponding path program 1 times [2020-12-09 08:51:33,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:51:33,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439181759] [2020-12-09 08:51:33,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:51:33,525 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 08:51:33,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148906249] [2020-12-09 08:51:33,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:51:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:51:33,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 08:51:33,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:51:33,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:51:33,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:51:33,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:51:33,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439181759] [2020-12-09 08:51:33,684 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:51:33,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148906249] [2020-12-09 08:51:33,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [65419538] [2020-12-09 08:51:33,698 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 08:51:33,698 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:51:33,702 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:51:33,705 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:51:33,705 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:51:33,754 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 08:51:33,982 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:51:34,368 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2020-12-09 08:51:34,749 WARN L197 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 71 [2020-12-09 08:51:35,185 WARN L197 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2020-12-09 08:51:35,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 08:51:35,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 3] total 9 [2020-12-09 08:51:35,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644157160] [2020-12-09 08:51:35,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 08:51:35,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:51:35,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 08:51:35,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-12-09 08:51:35,188 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2020-12-09 08:51:35,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:51:35,238 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-12-09 08:51:35,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 08:51:35,238 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-09 08:51:35,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:51:35,242 INFO L225 Difference]: With dead ends: 34 [2020-12-09 08:51:35,243 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 08:51:35,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-12-09 08:51:35,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 08:51:35,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-12-09 08:51:35,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 08:51:35,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-09 08:51:35,247 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 10 [2020-12-09 08:51:35,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:51:35,247 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-09 08:51:35,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 08:51:35,247 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-09 08:51:35,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 08:51:35,247 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:51:35,248 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:51:35,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:51:35,449 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:51:35,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:51:35,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1523002160, now seen corresponding path program 1 times [2020-12-09 08:51:35,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:51:35,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170096898] [2020-12-09 08:51:35,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:51:35,485 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 08:51:35,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603550135] [2020-12-09 08:51:35,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:51:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:51:35,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-09 08:51:35,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:51:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:51:35,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:51:35,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170096898] [2020-12-09 08:51:35,638 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:51:35,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603550135] [2020-12-09 08:51:35,639 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-09 08:51:35,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1438701364] [2020-12-09 08:51:35,640 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 08:51:35,640 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:51:35,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:51:35,641 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:51:35,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:51:35,655 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 08:51:35,862 FATAL L? ?]: Ignoring exception! java.lang.NullPointerException at java.base/java.util.Arrays.stream(Arrays.java:5614) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.AbstractGeneralizedAffineTerm.div(AbstractGeneralizedAffineTerm.java:395) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.constructRhsIntegerQuotient(SolveForSubjectUtils.java:456) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.ExplicitLhsPolynomialRelation.divideByIntegerCoefficient(ExplicitLhsPolynomialRelation.java:224) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubjectWithoutTreatableDivMod(SolveForSubjectUtils.java:110) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:82) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:212) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:585) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:573) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:76) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:451) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:401) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer$IDerHelper.findBestReplacementSbr(DualJunctionDer.java:305) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:319) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:223) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:190) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:174) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:141) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer.tryToEliminate(DualJunctionDer.java:119) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:776) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:739) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:656) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:358) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.convert(QuantifierPusher.java:217) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.access$0(TermTransformer.java:127) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:431) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.convert(QuantifierPusher.java:217) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.access$0(TermTransformer.java:127) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:431) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.convert(QuantifierPusher.java:217) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.access$0(TermTransformer.java:127) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:431) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.convert(QuantifierPusher.java:217) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.access$0(TermTransformer.java:127) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.doit(QuantifierPusher.java:523) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:378) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.convert(QuantifierPusher.java:217) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.access$0(TermTransformer.java:127) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.eliminate(QuantifierPusher.java:151) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.eliminate(QuantifierPusher.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elimPushPull(PartialQuantifierElimination.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elimPushPull(PartialQuantifierElimination.java:202) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118) at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1133) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 08:51:35,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:51:35,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 08:51:35,865 ERROR L205 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2020-12-09 08:51:35,865 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 08:51:36,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-09 08:51:36,071 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 08:51:36,071 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 08:51:36,072 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 08:51:36,072 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 08:51:36,079 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 08:51:36,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:51:36 BoogieIcfgContainer [2020-12-09 08:51:36,080 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 08:51:36,080 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 08:51:36,080 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 08:51:36,080 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 08:51:36,081 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:51:32" (3/4) ... [2020-12-09 08:51:36,083 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 08:51:36,083 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 08:51:36,085 INFO L168 Benchmark]: Toolchain (without parser) took 3990.90 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 66.9 MB in the beginning and 65.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 20.9 MB. Max. memory is 16.1 GB. [2020-12-09 08:51:36,085 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 94.4 MB. Free memory was 51.1 MB in the beginning and 51.0 MB in the end (delta: 76.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:51:36,086 INFO L168 Benchmark]: CACSL2BoogieTranslator took 190.08 ms. Allocated memory is still 94.4 MB. Free memory was 66.9 MB in the beginning and 70.6 MB in the end (delta: -3.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 08:51:36,086 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.32 ms. Allocated memory is still 94.4 MB. Free memory was 70.6 MB in the beginning and 68.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:51:36,087 INFO L168 Benchmark]: Boogie Preprocessor took 19.82 ms. Allocated memory is still 94.4 MB. Free memory was 68.9 MB in the beginning and 67.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:51:36,087 INFO L168 Benchmark]: RCFGBuilder took 264.51 ms. Allocated memory is still 94.4 MB. Free memory was 67.9 MB in the beginning and 50.0 MB in the end (delta: 17.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-12-09 08:51:36,088 INFO L168 Benchmark]: TraceAbstraction took 3477.10 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 49.6 MB in the beginning and 66.5 MB in the end (delta: -16.9 MB). Peak memory consumption was 39.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:51:36,089 INFO L168 Benchmark]: Witness Printer took 3.44 ms. Allocated memory is still 113.2 MB. Free memory was 66.5 MB in the beginning and 65.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:51:36,092 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 94.4 MB. Free memory was 51.1 MB in the beginning and 51.0 MB in the end (delta: 76.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 190.08 ms. Allocated memory is still 94.4 MB. Free memory was 66.9 MB in the beginning and 70.6 MB in the end (delta: -3.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.32 ms. Allocated memory is still 94.4 MB. Free memory was 70.6 MB in the beginning and 68.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.82 ms. Allocated memory is still 94.4 MB. Free memory was 68.9 MB in the beginning and 67.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 264.51 ms. Allocated memory is still 94.4 MB. Free memory was 67.9 MB in the beginning and 50.0 MB in the end (delta: 17.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3477.10 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 49.6 MB in the beginning and 66.5 MB in the end (delta: -16.9 MB). Peak memory consumption was 39.1 MB. Max. memory is 16.1 GB. * Witness Printer took 3.44 ms. Allocated memory is still 113.2 MB. Free memory was 66.5 MB in the beginning and 65.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L26] unsigned A, B; [L27] unsigned q, r, b; [L28] A = __VERIFIER_nondet_uint() [L16] COND TRUE !cond [L30] B = 1 [L31] q = 0 [L32] r = A [L33] b = B [L34] COND TRUE 1 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] COND TRUE 1 [L35] COND TRUE !(r >= b) [L38] COND TRUE 1 [L19] COND FALSE !(!(cond)) [L40] COND FALSE !(!(b != B)) [L41] q = 2 * q [L42] b = b / 2 [L43] COND FALSE !(r >= b) [L38] COND TRUE 1 [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 3.4s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 30 SDtfs, 41 SDslu, 21 SDs, 0 SdLazy, 46 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 1243 SizeOfPredicates, 13 NumberOfNonLiveVariables, 102 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 8/12 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: OVERALL_TIME[ms]: 285, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 6, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 10, TOOLS_POST_TIME[ms]: 123, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 10, TOOLS_QUANTIFIERELIM_TIME[ms]: 119, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 93, FLUID_QUERY_TIME[ms]: 2, FLUID_QUERIES: 21, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 1, DOMAIN_JOIN_TIME[ms]: 36, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME[ms]: 72, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME[ms]: 7, DOMAIN_ISBOTTOM_APPLICATIONS: 6, DOMAIN_ISBOTTOM_TIME[ms]: 19, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 100, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 99, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 1, PATH_EXPR_TIME[ms]: 2, REGEX_TO_DAG_TIME[ms]: 2, DAG_COMPRESSION_TIME[ms]: 5, DAG_COMPRESSION_PROCESSED_NODES: 47, DAG_COMPRESSION_RETAINED_NODES: 22, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 08:51:37,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 08:51:37,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 08:51:37,679 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 08:51:37,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 08:51:37,680 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 08:51:37,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 08:51:37,684 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 08:51:37,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 08:51:37,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 08:51:37,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 08:51:37,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 08:51:37,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 08:51:37,689 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 08:51:37,690 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 08:51:37,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 08:51:37,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 08:51:37,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 08:51:37,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 08:51:37,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 08:51:37,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 08:51:37,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 08:51:37,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 08:51:37,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 08:51:37,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 08:51:37,703 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 08:51:37,703 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 08:51:37,704 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 08:51:37,704 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 08:51:37,705 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 08:51:37,705 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 08:51:37,706 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 08:51:37,706 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 08:51:37,707 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 08:51:37,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 08:51:37,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 08:51:37,709 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 08:51:37,709 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 08:51:37,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 08:51:37,710 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 08:51:37,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 08:51:37,711 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 08:51:37,742 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 08:51:37,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 08:51:37,743 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 08:51:37,743 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 08:51:37,744 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 08:51:37,744 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 08:51:37,744 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 08:51:37,744 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 08:51:37,744 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 08:51:37,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 08:51:37,745 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 08:51:37,745 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 08:51:37,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 08:51:37,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 08:51:37,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 08:51:37,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 08:51:37,746 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 08:51:37,746 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 08:51:37,746 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 08:51:37,746 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 08:51:37,746 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 08:51:37,746 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 08:51:37,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 08:51:37,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 08:51:37,747 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 08:51:37,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 08:51:37,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:51:37,747 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 08:51:37,747 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 08:51:37,747 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 08:51:37,747 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 08:51:37,748 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 08:51:37,748 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 08:51:37,748 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 08:51:37,748 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 08:51:37,748 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-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d0dd826da977145676f85980fecf0ec40390b47 [2020-12-09 08:51:37,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 08:51:38,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 08:51:38,004 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 08:51:38,005 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 08:51:38,005 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 08:51:38,006 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i [2020-12-09 08:51:38,048 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/data/75a470711/a85ed7253bc24ff28b2100e71c80be8d/FLAG7378395ab [2020-12-09 08:51:38,353 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 08:51:38,354 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i [2020-12-09 08:51:38,360 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/data/75a470711/a85ed7253bc24ff28b2100e71c80be8d/FLAG7378395ab [2020-12-09 08:51:38,772 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/data/75a470711/a85ed7253bc24ff28b2100e71c80be8d [2020-12-09 08:51:38,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 08:51:38,776 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 08:51:38,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 08:51:38,777 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 08:51:38,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 08:51:38,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:51:38" (1/1) ... [2020-12-09 08:51:38,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f77f0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:51:38, skipping insertion in model container [2020-12-09 08:51:38,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:51:38" (1/1) ... [2020-12-09 08:51:38,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 08:51:38,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 08:51:38,902 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i[951,964] [2020-12-09 08:51:38,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:51:38,925 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 08:51:38,946 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i[951,964] [2020-12-09 08:51:38,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:51:38,969 INFO L208 MainTranslator]: Completed translation [2020-12-09 08:51:38,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:51:38 WrapperNode [2020-12-09 08:51:38,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 08:51:38,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 08:51:38,970 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 08:51:38,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 08:51:38,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:51:38" (1/1) ... [2020-12-09 08:51:38,981 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:51:38" (1/1) ... [2020-12-09 08:51:38,992 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 08:51:38,993 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 08:51:38,993 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 08:51:38,993 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 08:51:38,999 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:51:38" (1/1) ... [2020-12-09 08:51:38,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:51:38" (1/1) ... [2020-12-09 08:51:39,000 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:51:38" (1/1) ... [2020-12-09 08:51:39,000 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:51:38" (1/1) ... [2020-12-09 08:51:39,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:51:38" (1/1) ... [2020-12-09 08:51:39,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:51:38" (1/1) ... [2020-12-09 08:51:39,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:51:38" (1/1) ... [2020-12-09 08:51:39,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 08:51:39,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 08:51:39,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 08:51:39,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 08:51:39,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:51:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:51:39,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 08:51:39,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 08:51:39,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 08:51:39,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 08:51:39,249 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 08:51:39,250 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-09 08:51:39,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:51:39 BoogieIcfgContainer [2020-12-09 08:51:39,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 08:51:39,253 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 08:51:39,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 08:51:39,256 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 08:51:39,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:51:38" (1/3) ... [2020-12-09 08:51:39,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b1a33c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:51:39, skipping insertion in model container [2020-12-09 08:51:39,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:51:38" (2/3) ... [2020-12-09 08:51:39,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b1a33c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:51:39, skipping insertion in model container [2020-12-09 08:51:39,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:51:39" (3/3) ... [2020-12-09 08:51:39,259 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound1.i [2020-12-09 08:51:39,271 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 08:51:39,274 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-09 08:51:39,284 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-09 08:51:39,305 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 08:51:39,305 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 08:51:39,305 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 08:51:39,305 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 08:51:39,305 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 08:51:39,305 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 08:51:39,305 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 08:51:39,305 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 08:51:39,316 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-09 08:51:39,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 08:51:39,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:51:39,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:51:39,322 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:51:39,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:51:39,327 INFO L82 PathProgramCache]: Analyzing trace with hash 119520859, now seen corresponding path program 1 times [2020-12-09 08:51:39,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:51:39,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725771923] [2020-12-09 08:51:39,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 08:51:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:51:39,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 08:51:39,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:51:39,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:51:39,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:51:39,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725771923] [2020-12-09 08:51:39,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:51:39,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 08:51:39,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93670522] [2020-12-09 08:51:39,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 08:51:39,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:51:39,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 08:51:39,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 08:51:39,441 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-12-09 08:51:39,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:51:39,453 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-12-09 08:51:39,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 08:51:39,454 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-09 08:51:39,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:51:39,460 INFO L225 Difference]: With dead ends: 37 [2020-12-09 08:51:39,460 INFO L226 Difference]: Without dead ends: 16 [2020-12-09 08:51:39,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 08:51:39,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-09 08:51:39,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-09 08:51:39,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-09 08:51:39,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-12-09 08:51:39,484 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2020-12-09 08:51:39,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:51:39,485 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-12-09 08:51:39,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 08:51:39,485 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-12-09 08:51:39,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 08:51:39,485 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:51:39,486 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:51:39,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 08:51:39,687 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:51:39,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:51:39,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1186643548, now seen corresponding path program 1 times [2020-12-09 08:51:39,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:51:39,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [306346808] [2020-12-09 08:51:39,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 08:51:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:51:39,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 08:51:39,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:51:39,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:51:39,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:51:39,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [306346808] [2020-12-09 08:51:39,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:51:39,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 08:51:39,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024298795] [2020-12-09 08:51:39,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 08:51:39,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:51:39,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 08:51:39,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-09 08:51:39,868 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2020-12-09 08:51:40,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:51:40,137 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-12-09 08:51:40,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 08:51:40,138 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-12-09 08:51:40,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:51:40,138 INFO L225 Difference]: With dead ends: 29 [2020-12-09 08:51:40,139 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 08:51:40,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-12-09 08:51:40,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 08:51:40,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-12-09 08:51:40,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 08:51:40,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-12-09 08:51:40,143 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 9 [2020-12-09 08:51:40,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:51:40,144 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-12-09 08:51:40,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 08:51:40,144 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-12-09 08:51:40,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 08:51:40,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:51:40,144 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:51:40,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 08:51:40,346 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:51:40,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:51:40,348 INFO L82 PathProgramCache]: Analyzing trace with hash -2054849417, now seen corresponding path program 1 times [2020-12-09 08:51:40,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:51:40,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647155672] [2020-12-09 08:51:40,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 08:51:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:51:40,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 08:51:40,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:51:40,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:51:40,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:51:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:51:40,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647155672] [2020-12-09 08:51:40,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-09 08:51:40,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2020-12-09 08:51:40,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11170286] [2020-12-09 08:51:40,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 08:51:40,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:51:40,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 08:51:40,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-09 08:51:40,675 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 6 states. [2020-12-09 08:51:40,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:51:40,676 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-12-09 08:51:40,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 08:51:40,677 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-09 08:51:40,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:51:40,677 INFO L225 Difference]: With dead ends: 21 [2020-12-09 08:51:40,677 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 08:51:40,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-09 08:51:40,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 08:51:40,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 08:51:40,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 08:51:40,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 08:51:40,679 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2020-12-09 08:51:40,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:51:40,679 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 08:51:40,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 08:51:40,679 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 08:51:40,679 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 08:51:40,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 08:51:40,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 08:51:40,942 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2020-12-09 08:51:40,942 INFO L262 CegarLoopResult]: For program point L19(lines 19 22) no Hoare annotation was computed. [2020-12-09 08:51:40,942 INFO L258 CegarLoopResult]: At program point L19-2(line 40) the Hoare annotation is: false [2020-12-09 08:51:40,942 INFO L262 CegarLoopResult]: For program point L19-3(lines 19 22) no Hoare annotation was computed. [2020-12-09 08:51:40,942 INFO L262 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-12-09 08:51:40,943 INFO L265 CegarLoopResult]: At program point L19-5(lines 18 24) the Hoare annotation is: true [2020-12-09 08:51:40,943 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-09 08:51:40,943 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 08:51:40,943 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-09 08:51:40,943 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2020-12-09 08:51:40,943 INFO L262 CegarLoopResult]: For program point L20(lines 20 21) no Hoare annotation was computed. [2020-12-09 08:51:40,943 INFO L262 CegarLoopResult]: For program point L20-1(lines 20 21) no Hoare annotation was computed. [2020-12-09 08:51:40,943 INFO L265 CegarLoopResult]: At program point L49(lines 25 50) the Hoare annotation is: true [2020-12-09 08:51:40,943 INFO L262 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-12-09 08:51:40,943 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 08:51:40,943 INFO L262 CegarLoopResult]: For program point L38-1(lines 38 47) no Hoare annotation was computed. [2020-12-09 08:51:40,943 INFO L258 CegarLoopResult]: At program point L34-2(lines 34 37) the Hoare annotation is: false [2020-12-09 08:51:40,944 INFO L262 CegarLoopResult]: For program point L43(lines 43 46) no Hoare annotation was computed. [2020-12-09 08:51:40,944 INFO L262 CegarLoopResult]: For program point L43-2(lines 25 50) no Hoare annotation was computed. [2020-12-09 08:51:40,944 INFO L262 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2020-12-09 08:51:40,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:51:40 BoogieIcfgContainer [2020-12-09 08:51:40,949 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 08:51:40,950 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 08:51:40,950 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 08:51:40,950 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 08:51:40,950 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:51:39" (3/4) ... [2020-12-09 08:51:40,952 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 08:51:40,959 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-09 08:51:40,960 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 08:51:40,960 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 08:51:40,960 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 08:51:40,992 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a725f8c0-cee4-45db-8509-4dc1c9eafef9/bin/utaipan/witness.graphml [2020-12-09 08:51:40,992 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 08:51:40,994 INFO L168 Benchmark]: Toolchain (without parser) took 2216.75 ms. Allocated memory was 75.5 MB in the beginning and 107.0 MB in the end (delta: 31.5 MB). Free memory was 41.7 MB in the beginning and 68.2 MB in the end (delta: -26.5 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. [2020-12-09 08:51:40,994 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 75.5 MB. Free memory was 57.8 MB in the beginning and 57.7 MB in the end (delta: 123.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:51:40,995 INFO L168 Benchmark]: CACSL2BoogieTranslator took 192.36 ms. Allocated memory is still 75.5 MB. Free memory was 41.5 MB in the beginning and 58.9 MB in the end (delta: -17.5 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. [2020-12-09 08:51:40,995 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.51 ms. Allocated memory is still 75.5 MB. Free memory was 58.9 MB in the beginning and 57.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:51:40,996 INFO L168 Benchmark]: Boogie Preprocessor took 16.38 ms. Allocated memory is still 75.5 MB. Free memory was 57.5 MB in the beginning and 56.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:51:40,996 INFO L168 Benchmark]: RCFGBuilder took 241.64 ms. Allocated memory is still 75.5 MB. Free memory was 56.1 MB in the beginning and 43.3 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 08:51:40,997 INFO L168 Benchmark]: TraceAbstraction took 1696.30 ms. Allocated memory was 75.5 MB in the beginning and 107.0 MB in the end (delta: 31.5 MB). Free memory was 42.8 MB in the beginning and 71.1 MB in the end (delta: -28.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 08:51:40,997 INFO L168 Benchmark]: Witness Printer took 42.24 ms. Allocated memory is still 107.0 MB. Free memory was 71.1 MB in the beginning and 68.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 08:51:41,000 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 75.5 MB. Free memory was 57.8 MB in the beginning and 57.7 MB in the end (delta: 123.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 192.36 ms. Allocated memory is still 75.5 MB. Free memory was 41.5 MB in the beginning and 58.9 MB in the end (delta: -17.5 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 22.51 ms. Allocated memory is still 75.5 MB. Free memory was 58.9 MB in the beginning and 57.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.38 ms. Allocated memory is still 75.5 MB. Free memory was 57.5 MB in the beginning and 56.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 241.64 ms. Allocated memory is still 75.5 MB. Free memory was 56.1 MB in the beginning and 43.3 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1696.30 ms. Allocated memory was 75.5 MB in the beginning and 107.0 MB in the end (delta: 31.5 MB). Free memory was 42.8 MB in the beginning and 71.1 MB in the end (delta: -28.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Witness Printer took 42.24 ms. Allocated memory is still 107.0 MB. Free memory was 71.1 MB in the beginning and 68.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.5s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 31 SDtfs, 50 SDslu, 24 SDs, 0 SdLazy, 43 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 6 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 35 ConstructedInterpolants, 0 QuantifiedInterpolants, 1777 SizeOfPredicates, 17 NumberOfNonLiveVariables, 95 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 2/4 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 correct! Received shutdown request...