./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/scopes3_false-valid-deref.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_6b2a80a7-8613-47bd-b639-98b67d85db4f/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6b2a80a7-8613-47bd-b639-98b67d85db4f/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6b2a80a7-8613-47bd-b639-98b67d85db4f/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6b2a80a7-8613-47bd-b639-98b67d85db4f/bin-2019/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/scopes3_false-valid-deref.c -s /tmp/vcloud-vcloud-master/worker/working_dir_6b2a80a7-8613-47bd-b639-98b67d85db4f/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6b2a80a7-8613-47bd-b639-98b67d85db4f/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7efcb16e512d7de15a71f6cd895dcd8493c4b646 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-02 05:25:22,222 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 05:25:22,223 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 05:25:22,230 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 05:25:22,230 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 05:25:22,231 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 05:25:22,231 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 05:25:22,233 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 05:25:22,234 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 05:25:22,234 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 05:25:22,235 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 05:25:22,235 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 05:25:22,236 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 05:25:22,236 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 05:25:22,237 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 05:25:22,237 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 05:25:22,238 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 05:25:22,239 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 05:25:22,240 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 05:25:22,241 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 05:25:22,241 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 05:25:22,242 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 05:25:22,244 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 05:25:22,244 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 05:25:22,244 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 05:25:22,245 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 05:25:22,245 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 05:25:22,245 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 05:25:22,246 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 05:25:22,247 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 05:25:22,247 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 05:25:22,247 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 05:25:22,247 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 05:25:22,248 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 05:25:22,248 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 05:25:22,249 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 05:25:22,249 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6b2a80a7-8613-47bd-b639-98b67d85db4f/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2018-12-02 05:25:22,258 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 05:25:22,258 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 05:25:22,259 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 05:25:22,259 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 05:25:22,260 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-02 05:25:22,260 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-02 05:25:22,260 INFO L133 SettingsManager]: * Use SBE=true [2018-12-02 05:25:22,260 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 05:25:22,260 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 05:25:22,261 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-02 05:25:22,261 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 05:25:22,261 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 05:25:22,261 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 05:25:22,261 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-02 05:25:22,261 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-02 05:25:22,261 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-02 05:25:22,262 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 05:25:22,262 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 05:25:22,262 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-02 05:25:22,262 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 05:25:22,262 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 05:25:22,262 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 05:25:22,263 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 05:25:22,263 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 05:25:22,263 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 05:25:22,263 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 05:25:22,263 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-02 05:25:22,263 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 05:25:22,264 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in 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/working_dir_6b2a80a7-8613-47bd-b639-98b67d85db4f/bin-2019/uautomizer 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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer 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 -> 7efcb16e512d7de15a71f6cd895dcd8493c4b646 [2018-12-02 05:25:22,284 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 05:25:22,293 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 05:25:22,295 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 05:25:22,296 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 05:25:22,297 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 05:25:22,297 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6b2a80a7-8613-47bd-b639-98b67d85db4f/bin-2019/uautomizer/../../sv-benchmarks/c/memsafety-ext3/scopes3_false-valid-deref.c [2018-12-02 05:25:22,336 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6b2a80a7-8613-47bd-b639-98b67d85db4f/bin-2019/uautomizer/data/86381eae3/4816f552413a47f69ed74c86b02157b6/FLAGc5647c688 [2018-12-02 05:25:22,744 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 05:25:22,744 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6b2a80a7-8613-47bd-b639-98b67d85db4f/sv-benchmarks/c/memsafety-ext3/scopes3_false-valid-deref.c [2018-12-02 05:25:22,747 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6b2a80a7-8613-47bd-b639-98b67d85db4f/bin-2019/uautomizer/data/86381eae3/4816f552413a47f69ed74c86b02157b6/FLAGc5647c688 [2018-12-02 05:25:22,756 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6b2a80a7-8613-47bd-b639-98b67d85db4f/bin-2019/uautomizer/data/86381eae3/4816f552413a47f69ed74c86b02157b6 [2018-12-02 05:25:22,758 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 05:25:22,759 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-12-02 05:25:22,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 05:25:22,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 05:25:22,761 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 05:25:22,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:25:22" (1/1) ... [2018-12-02 05:25:22,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4045691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:25:22, skipping insertion in model container [2018-12-02 05:25:22,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:25:22" (1/1) ... [2018-12-02 05:25:22,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 05:25:22,776 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 05:25:22,865 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 05:25:22,871 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 05:25:22,880 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 05:25:22,889 INFO L195 MainTranslator]: Completed translation [2018-12-02 05:25:22,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:25:22 WrapperNode [2018-12-02 05:25:22,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 05:25:22,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 05:25:22,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 05:25:22,890 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 05:25:22,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:25:22" (1/1) ... [2018-12-02 05:25:22,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:25:22" (1/1) ... [2018-12-02 05:25:22,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:25:22" (1/1) ... [2018-12-02 05:25:22,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:25:22" (1/1) ... [2018-12-02 05:25:22,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:25:22" (1/1) ... [2018-12-02 05:25:22,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:25:22" (1/1) ... [2018-12-02 05:25:22,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:25:22" (1/1) ... [2018-12-02 05:25:22,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 05:25:22,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 05:25:22,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 05:25:22,909 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 05:25:22,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:25:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b2a80a7-8613-47bd-b639-98b67d85db4f/bin-2019/uautomizer/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 [2018-12-02 05:25:22,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 05:25:22,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 05:25:22,982 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 05:25:22,983 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 05:25:22,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-02 05:25:22,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-02 05:25:22,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-02 05:25:22,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 05:25:22,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 05:25:22,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-02 05:25:23,071 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 05:25:23,072 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-02 05:25:23,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:25:23 BoogieIcfgContainer [2018-12-02 05:25:23,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 05:25:23,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 05:25:23,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 05:25:23,074 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 05:25:23,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:25:22" (1/3) ... [2018-12-02 05:25:23,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673953c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:25:23, skipping insertion in model container [2018-12-02 05:25:23,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:25:22" (2/3) ... [2018-12-02 05:25:23,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673953c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:25:23, skipping insertion in model container [2018-12-02 05:25:23,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:25:23" (3/3) ... [2018-12-02 05:25:23,076 INFO L112 eAbstractionObserver]: Analyzing ICFG scopes3_false-valid-deref.c [2018-12-02 05:25:23,082 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 05:25:23,086 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-12-02 05:25:23,094 INFO L257 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2018-12-02 05:25:23,108 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-02 05:25:23,108 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 05:25:23,108 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-02 05:25:23,108 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 05:25:23,108 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 05:25:23,108 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 05:25:23,109 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 05:25:23,109 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 05:25:23,109 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 05:25:23,117 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-12-02 05:25:23,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-02 05:25:23,122 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:25:23,122 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:25:23,123 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-12-02 05:25:23,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:25:23,127 INFO L82 PathProgramCache]: Analyzing trace with hash -197094901, now seen corresponding path program 1 times [2018-12-02 05:25:23,128 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 05:25:23,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 05:25:23,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:23,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:25:23,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:25:23,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 05:25:23,194 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 05:25:23,195 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-02 05:25:23,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-02 05:25:23,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-02 05:25:23,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-02 05:25:23,206 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-12-02 05:25:23,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:25:23,215 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-12-02 05:25:23,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-02 05:25:23,216 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2018-12-02 05:25:23,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:25:23,221 INFO L225 Difference]: With dead ends: 20 [2018-12-02 05:25:23,221 INFO L226 Difference]: Without dead ends: 17 [2018-12-02 05:25:23,222 INFO L631 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 [2018-12-02 05:25:23,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-12-02 05:25:23,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-12-02 05:25:23,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-02 05:25:23,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-12-02 05:25:23,241 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 8 [2018-12-02 05:25:23,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:25:23,241 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-12-02 05:25:23,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-02 05:25:23,241 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-12-02 05:25:23,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-02 05:25:23,241 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:25:23,242 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:25:23,242 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-12-02 05:25:23,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:25:23,242 INFO L82 PathProgramCache]: Analyzing trace with hash -197095180, now seen corresponding path program 1 times [2018-12-02 05:25:23,242 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 05:25:23,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 05:25:23,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:23,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:25:23,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:23,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:25:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 05:25:23,264 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 05:25:23,264 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-02 05:25:23,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-02 05:25:23,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-02 05:25:23,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 05:25:23,265 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 3 states. [2018-12-02 05:25:23,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:25:23,283 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-12-02 05:25:23,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-02 05:25:23,284 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-12-02 05:25:23,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:25:23,284 INFO L225 Difference]: With dead ends: 22 [2018-12-02 05:25:23,284 INFO L226 Difference]: Without dead ends: 22 [2018-12-02 05:25:23,285 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 05:25:23,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-02 05:25:23,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2018-12-02 05:25:23,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-02 05:25:23,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-12-02 05:25:23,287 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 8 [2018-12-02 05:25:23,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:25:23,287 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-12-02 05:25:23,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-02 05:25:23,287 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-12-02 05:25:23,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-02 05:25:23,288 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:25:23,288 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:25:23,288 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-12-02 05:25:23,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:25:23,288 INFO L82 PathProgramCache]: Analyzing trace with hash -197095125, now seen corresponding path program 1 times [2018-12-02 05:25:23,288 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 05:25:23,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 05:25:23,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:23,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:25:23,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:25:23,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 05:25:23,317 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 05:25:23,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-02 05:25:23,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-02 05:25:23,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-02 05:25:23,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 05:25:23,318 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 3 states. [2018-12-02 05:25:23,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:25:23,333 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-12-02 05:25:23,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-02 05:25:23,333 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-12-02 05:25:23,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:25:23,333 INFO L225 Difference]: With dead ends: 16 [2018-12-02 05:25:23,334 INFO L226 Difference]: Without dead ends: 16 [2018-12-02 05:25:23,334 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 05:25:23,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-12-02 05:25:23,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-12-02 05:25:23,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-02 05:25:23,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-12-02 05:25:23,336 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 8 [2018-12-02 05:25:23,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:25:23,336 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-12-02 05:25:23,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-02 05:25:23,336 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-12-02 05:25:23,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-02 05:25:23,336 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:25:23,336 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:25:23,337 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-12-02 05:25:23,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:25:23,337 INFO L82 PathProgramCache]: Analyzing trace with hash -197095126, now seen corresponding path program 1 times [2018-12-02 05:25:23,337 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 05:25:23,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 05:25:23,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:23,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:25:23,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:25:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 05:25:23,352 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 05:25:23,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-02 05:25:23,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-02 05:25:23,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-02 05:25:23,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 05:25:23,352 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2018-12-02 05:25:23,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:25:23,362 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-12-02 05:25:23,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-02 05:25:23,363 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-12-02 05:25:23,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:25:23,363 INFO L225 Difference]: With dead ends: 15 [2018-12-02 05:25:23,363 INFO L226 Difference]: Without dead ends: 15 [2018-12-02 05:25:23,363 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 05:25:23,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-12-02 05:25:23,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-12-02 05:25:23,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-02 05:25:23,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-12-02 05:25:23,365 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2018-12-02 05:25:23,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:25:23,365 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-12-02 05:25:23,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-02 05:25:23,366 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-12-02 05:25:23,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-02 05:25:23,366 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:25:23,366 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:25:23,366 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-12-02 05:25:23,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:25:23,367 INFO L82 PathProgramCache]: Analyzing trace with hash -440617163, now seen corresponding path program 1 times [2018-12-02 05:25:23,367 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 05:25:23,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 05:25:23,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:23,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:25:23,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:25:23,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 05:25:23,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:25:23,389 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b2a80a7-8613-47bd-b639-98b67d85db4f/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 05:25:23,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:25:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:25:23,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 05:25:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 05:25:23,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 05:25:23,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-12-02 05:25:23,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 05:25:23,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 05:25:23,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-12-02 05:25:23,459 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2018-12-02 05:25:23,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:25:23,470 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-12-02 05:25:23,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-02 05:25:23,470 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-12-02 05:25:23,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:25:23,470 INFO L225 Difference]: With dead ends: 20 [2018-12-02 05:25:23,470 INFO L226 Difference]: Without dead ends: 20 [2018-12-02 05:25:23,471 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-12-02 05:25:23,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-02 05:25:23,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2018-12-02 05:25:23,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-02 05:25:23,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-12-02 05:25:23,472 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2018-12-02 05:25:23,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:25:23,472 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-12-02 05:25:23,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 05:25:23,473 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-12-02 05:25:23,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-02 05:25:23,473 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:25:23,473 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:25:23,473 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-12-02 05:25:23,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:25:23,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1004249772, now seen corresponding path program 2 times [2018-12-02 05:25:23,473 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 05:25:23,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 05:25:23,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:23,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:25:23,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:25:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 05:25:23,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:25:23,500 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b2a80a7-8613-47bd-b639-98b67d85db4f/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 05:25:23,508 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-02 05:25:23,520 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-02 05:25:23,521 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 05:25:23,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 05:25:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 05:25:23,551 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 05:25:23,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-12-02 05:25:23,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-02 05:25:23,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-02 05:25:23,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-02 05:25:23,552 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2018-12-02 05:25:23,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:25:23,566 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-12-02 05:25:23,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 05:25:23,566 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2018-12-02 05:25:23,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:25:23,567 INFO L225 Difference]: With dead ends: 23 [2018-12-02 05:25:23,567 INFO L226 Difference]: Without dead ends: 23 [2018-12-02 05:25:23,567 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-02 05:25:23,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-02 05:25:23,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-12-02 05:25:23,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-02 05:25:23,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-12-02 05:25:23,570 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2018-12-02 05:25:23,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:25:23,570 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-12-02 05:25:23,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-02 05:25:23,570 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-12-02 05:25:23,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-02 05:25:23,571 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:25:23,571 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:25:23,571 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-12-02 05:25:23,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:25:23,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1138822869, now seen corresponding path program 3 times [2018-12-02 05:25:23,572 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 05:25:23,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 05:25:23,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:23,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 05:25:23,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:25:23,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 05:25:23,615 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:25:23,615 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b2a80a7-8613-47bd-b639-98b67d85db4f/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 05:25:23,621 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 05:25:23,636 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-02 05:25:23,636 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 05:25:23,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 05:25:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 05:25:23,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 05:25:23,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-12-02 05:25:23,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-02 05:25:23,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-02 05:25:23,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-12-02 05:25:23,658 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 7 states. [2018-12-02 05:25:23,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:25:23,675 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-12-02 05:25:23,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 05:25:23,675 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2018-12-02 05:25:23,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:25:23,676 INFO L225 Difference]: With dead ends: 26 [2018-12-02 05:25:23,676 INFO L226 Difference]: Without dead ends: 26 [2018-12-02 05:25:23,676 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-12-02 05:25:23,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-02 05:25:23,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2018-12-02 05:25:23,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-02 05:25:23,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-12-02 05:25:23,678 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 17 [2018-12-02 05:25:23,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:25:23,678 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-12-02 05:25:23,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-02 05:25:23,678 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-12-02 05:25:23,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-02 05:25:23,679 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:25:23,679 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:25:23,679 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-12-02 05:25:23,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:25:23,679 INFO L82 PathProgramCache]: Analyzing trace with hash 727015860, now seen corresponding path program 4 times [2018-12-02 05:25:23,679 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 05:25:23,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 05:25:23,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:23,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 05:25:23,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:25:23,719 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 05:25:23,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:25:23,719 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b2a80a7-8613-47bd-b639-98b67d85db4f/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 05:25:23,725 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 05:25:23,734 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 05:25:23,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 05:25:23,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 05:25:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 05:25:23,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 05:25:23,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-12-02 05:25:23,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-02 05:25:23,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-02 05:25:23,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-02 05:25:23,758 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 8 states. [2018-12-02 05:25:23,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:25:23,774 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-12-02 05:25:23,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 05:25:23,774 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-12-02 05:25:23,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:25:23,775 INFO L225 Difference]: With dead ends: 29 [2018-12-02 05:25:23,775 INFO L226 Difference]: Without dead ends: 29 [2018-12-02 05:25:23,775 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-02 05:25:23,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-02 05:25:23,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2018-12-02 05:25:23,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-02 05:25:23,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-12-02 05:25:23,777 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 20 [2018-12-02 05:25:23,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:25:23,777 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-12-02 05:25:23,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-02 05:25:23,777 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-12-02 05:25:23,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-02 05:25:23,778 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:25:23,778 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:25:23,778 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-12-02 05:25:23,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:25:23,778 INFO L82 PathProgramCache]: Analyzing trace with hash -988991883, now seen corresponding path program 5 times [2018-12-02 05:25:23,778 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 05:25:23,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 05:25:23,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:23,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 05:25:23,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:25:23,825 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 05:25:23,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:25:23,826 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b2a80a7-8613-47bd-b639-98b67d85db4f/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 05:25:23,832 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-02 05:25:23,859 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-12-02 05:25:23,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 05:25:23,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 05:25:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 05:25:23,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 05:25:23,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-12-02 05:25:23,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-02 05:25:23,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-02 05:25:23,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-12-02 05:25:23,889 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 9 states. [2018-12-02 05:25:23,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:25:23,909 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-12-02 05:25:23,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-02 05:25:23,909 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2018-12-02 05:25:23,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:25:23,910 INFO L225 Difference]: With dead ends: 32 [2018-12-02 05:25:23,910 INFO L226 Difference]: Without dead ends: 32 [2018-12-02 05:25:23,910 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-12-02 05:25:23,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-02 05:25:23,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-12-02 05:25:23,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-02 05:25:23,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-12-02 05:25:23,913 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 23 [2018-12-02 05:25:23,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:25:23,914 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-12-02 05:25:23,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-02 05:25:23,914 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-12-02 05:25:23,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-02 05:25:23,914 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:25:23,915 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:25:23,915 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-12-02 05:25:23,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:25:23,915 INFO L82 PathProgramCache]: Analyzing trace with hash 420060692, now seen corresponding path program 6 times [2018-12-02 05:25:23,915 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 05:25:23,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 05:25:23,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:23,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 05:25:23,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:25:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 05:25:23,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:25:23,984 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b2a80a7-8613-47bd-b639-98b67d85db4f/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 05:25:23,993 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-02 05:25:24,022 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-12-02 05:25:24,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 05:25:24,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 05:25:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 05:25:24,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 05:25:24,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-12-02 05:25:24,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-02 05:25:24,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-02 05:25:24,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-02 05:25:24,049 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 10 states. [2018-12-02 05:25:24,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:25:24,076 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-12-02 05:25:24,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-02 05:25:24,076 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2018-12-02 05:25:24,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:25:24,076 INFO L225 Difference]: With dead ends: 35 [2018-12-02 05:25:24,076 INFO L226 Difference]: Without dead ends: 35 [2018-12-02 05:25:24,077 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-02 05:25:24,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-02 05:25:24,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2018-12-02 05:25:24,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-02 05:25:24,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-12-02 05:25:24,079 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 26 [2018-12-02 05:25:24,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:25:24,079 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-12-02 05:25:24,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-02 05:25:24,079 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-12-02 05:25:24,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-02 05:25:24,079 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:25:24,079 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:25:24,080 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-12-02 05:25:24,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:25:24,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1505028587, now seen corresponding path program 7 times [2018-12-02 05:25:24,080 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 05:25:24,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 05:25:24,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:24,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 05:25:24,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:24,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:25:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 05:25:24,133 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:25:24,133 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b2a80a7-8613-47bd-b639-98b67d85db4f/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 05:25:24,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:25:24,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:25:24,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 05:25:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 05:25:24,186 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 05:25:24,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-12-02 05:25:24,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-02 05:25:24,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-02 05:25:24,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-02 05:25:24,187 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 11 states. [2018-12-02 05:25:24,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:25:24,213 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-12-02 05:25:24,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 05:25:24,214 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-12-02 05:25:24,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:25:24,214 INFO L225 Difference]: With dead ends: 38 [2018-12-02 05:25:24,215 INFO L226 Difference]: Without dead ends: 38 [2018-12-02 05:25:24,215 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-02 05:25:24,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-02 05:25:24,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2018-12-02 05:25:24,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-12-02 05:25:24,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-12-02 05:25:24,218 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 29 [2018-12-02 05:25:24,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:25:24,218 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-12-02 05:25:24,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-02 05:25:24,219 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-12-02 05:25:24,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-12-02 05:25:24,219 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:25:24,219 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:25:24,220 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-12-02 05:25:24,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:25:24,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1141435788, now seen corresponding path program 8 times [2018-12-02 05:25:24,220 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 05:25:24,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 05:25:24,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:24,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:25:24,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:24,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:25:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 05:25:24,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:25:24,303 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b2a80a7-8613-47bd-b639-98b67d85db4f/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 05:25:24,312 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-02 05:25:24,332 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-02 05:25:24,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 05:25:24,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 05:25:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 05:25:24,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 05:25:24,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-12-02 05:25:24,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-02 05:25:24,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-02 05:25:24,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-02 05:25:24,356 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 12 states. [2018-12-02 05:25:24,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:25:24,374 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-12-02 05:25:24,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-02 05:25:24,374 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2018-12-02 05:25:24,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:25:24,374 INFO L225 Difference]: With dead ends: 41 [2018-12-02 05:25:24,374 INFO L226 Difference]: Without dead ends: 41 [2018-12-02 05:25:24,375 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-02 05:25:24,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-12-02 05:25:24,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2018-12-02 05:25:24,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-02 05:25:24,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-12-02 05:25:24,376 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 32 [2018-12-02 05:25:24,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:25:24,376 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-12-02 05:25:24,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-02 05:25:24,377 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-12-02 05:25:24,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-12-02 05:25:24,377 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:25:24,377 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:25:24,377 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-12-02 05:25:24,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:25:24,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1255881291, now seen corresponding path program 9 times [2018-12-02 05:25:24,377 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 05:25:24,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 05:25:24,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:24,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 05:25:24,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:24,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:25:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 05:25:24,458 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:25:24,458 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b2a80a7-8613-47bd-b639-98b67d85db4f/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 05:25:24,464 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 05:25:24,498 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-12-02 05:25:24,498 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 05:25:24,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 05:25:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 05:25:24,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 05:25:24,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-12-02 05:25:24,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-02 05:25:24,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-02 05:25:24,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-02 05:25:24,525 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 13 states. [2018-12-02 05:25:24,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:25:24,546 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-12-02 05:25:24,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-02 05:25:24,546 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2018-12-02 05:25:24,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:25:24,547 INFO L225 Difference]: With dead ends: 42 [2018-12-02 05:25:24,547 INFO L226 Difference]: Without dead ends: 42 [2018-12-02 05:25:24,547 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-02 05:25:24,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-02 05:25:24,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-12-02 05:25:24,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-02 05:25:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-12-02 05:25:24,549 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 35 [2018-12-02 05:25:24,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:25:24,549 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-12-02 05:25:24,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-02 05:25:24,549 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-12-02 05:25:24,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-02 05:25:24,550 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:25:24,550 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:25:24,550 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-12-02 05:25:24,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:25:24,550 INFO L82 PathProgramCache]: Analyzing trace with hash -497828140, now seen corresponding path program 10 times [2018-12-02 05:25:24,550 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 05:25:24,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 05:25:24,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:24,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 05:25:24,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:25:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 05:25:24,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 05:25:24,614 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-02 05:25:24,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 05:25:24 BoogieIcfgContainer [2018-12-02 05:25:24,638 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 05:25:24,638 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 05:25:24,639 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 05:25:24,639 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 05:25:24,639 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:25:23" (3/4) ... [2018-12-02 05:25:24,641 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-02 05:25:24,675 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_6b2a80a7-8613-47bd-b639-98b67d85db4f/bin-2019/uautomizer/witness.graphml [2018-12-02 05:25:24,675 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 05:25:24,676 INFO L168 Benchmark]: Toolchain (without parser) took 1917.64 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.7 MB). Free memory was 954.9 MB in the beginning and 783.2 MB in the end (delta: 171.7 MB). Peak memory consumption was 284.5 MB. Max. memory is 11.5 GB. [2018-12-02 05:25:24,677 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 05:25:24,677 INFO L168 Benchmark]: CACSL2BoogieTranslator took 130.59 ms. Allocated memory is still 1.0 GB. Free memory was 954.9 MB in the beginning and 944.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-02 05:25:24,677 INFO L168 Benchmark]: Boogie Preprocessor took 19.31 ms. Allocated memory is still 1.0 GB. Free memory is still 944.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 05:25:24,678 INFO L168 Benchmark]: RCFGBuilder took 162.88 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.7 MB). Free memory was 944.2 MB in the beginning and 1.1 GB in the end (delta: -147.4 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. [2018-12-02 05:25:24,678 INFO L168 Benchmark]: TraceAbstraction took 1565.68 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 783.2 MB in the end (delta: 308.4 MB). Peak memory consumption was 308.4 MB. Max. memory is 11.5 GB. [2018-12-02 05:25:24,678 INFO L168 Benchmark]: Witness Printer took 36.57 ms. Allocated memory is still 1.1 GB. Free memory is still 783.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 05:25:24,679 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 130.59 ms. Allocated memory is still 1.0 GB. Free memory was 954.9 MB in the beginning and 944.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.31 ms. Allocated memory is still 1.0 GB. Free memory is still 944.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 162.88 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.7 MB). Free memory was 944.2 MB in the beginning and 1.1 GB in the end (delta: -147.4 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1565.68 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 783.2 MB in the end (delta: 308.4 MB). Peak memory consumption was 308.4 MB. Max. memory is 11.5 GB. * Witness Printer took 36.57 ms. Allocated memory is still 1.1 GB. Free memory is still 783.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L2] int* p; [L3] int i = 0; VAL [i=0] [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={45:0}, i=0, p={45:0}] [L6] p[0] = 1 VAL [a={45:0}, i=0, p={45:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={43:0}, i=1, p={43:0}] [L6] p[0] = 1 VAL [a={43:0}, i=1, p={43:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={47:0}, i=2, p={47:0}] [L6] p[0] = 1 VAL [a={47:0}, i=2, p={47:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={41:0}, i=3, p={41:0}] [L6] p[0] = 1 VAL [a={41:0}, i=3, p={41:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={51:0}, i=4, p={51:0}] [L6] p[0] = 1 VAL [a={51:0}, i=4, p={51:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={48:0}, i=5, p={48:0}] [L6] p[0] = 1 VAL [a={48:0}, i=5, p={48:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={46:0}, i=6, p={46:0}] [L6] p[0] = 1 VAL [a={46:0}, i=6, p={46:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={44:0}, i=7, p={44:0}] [L6] p[0] = 1 VAL [a={44:0}, i=7, p={44:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={49:0}, i=8, p={49:0}] [L6] p[0] = 1 VAL [a={49:0}, i=8, p={49:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={51:0}, i=9, p={51:0}] [L6] p[0] = 1 VAL [a={51:0}, i=9, p={51:0}] [L3] i++ [L3] COND FALSE !(i < 10) VAL [i=10, p={51:0}] [L8] p[0] = 2 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 20 locations, 5 error locations. UNSAFE Result, 1.5s OverallTime, 14 OverallIterations, 10 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 165 SDtfs, 123 SDslu, 422 SDs, 0 SdLazy, 189 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 279 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 20 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 484 NumberOfCodeBlocks, 480 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 424 ConstructedInterpolants, 0 QuantifiedInterpolants, 24918 SizeOfPredicates, 9 NumberOfNonLiveVariables, 1131 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 0/810 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...