./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 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_ec8a2eb5-939a-4f2a-bb2b-ef36099495b7/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_ec8a2eb5-939a-4f2a-bb2b-ef36099495b7/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_ec8a2eb5-939a-4f2a-bb2b-ef36099495b7/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_ec8a2eb5-939a-4f2a-bb2b-ef36099495b7/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_ec8a2eb5-939a-4f2a-bb2b-ef36099495b7/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_ec8a2eb5-939a-4f2a-bb2b-ef36099495b7/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 0.1.23-0cd3be1 [2018-11-28 11:43:59,316 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 11:43:59,317 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 11:43:59,325 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 11:43:59,325 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 11:43:59,326 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 11:43:59,327 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 11:43:59,328 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 11:43:59,329 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 11:43:59,330 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 11:43:59,330 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 11:43:59,330 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 11:43:59,331 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 11:43:59,332 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 11:43:59,332 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 11:43:59,333 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 11:43:59,334 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 11:43:59,335 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 11:43:59,337 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 11:43:59,338 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 11:43:59,339 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 11:43:59,339 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 11:43:59,341 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 11:43:59,341 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 11:43:59,342 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 11:43:59,342 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 11:43:59,343 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 11:43:59,344 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 11:43:59,345 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 11:43:59,346 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 11:43:59,346 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 11:43:59,346 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 11:43:59,347 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 11:43:59,347 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 11:43:59,347 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 11:43:59,348 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 11:43:59,348 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_ec8a2eb5-939a-4f2a-bb2b-ef36099495b7/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2018-11-28 11:43:59,359 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 11:43:59,359 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 11:43:59,360 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 11:43:59,360 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 11:43:59,360 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 11:43:59,361 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 11:43:59,361 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 11:43:59,361 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 11:43:59,361 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 11:43:59,361 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-28 11:43:59,361 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 11:43:59,362 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 11:43:59,362 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 11:43:59,362 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-11-28 11:43:59,362 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-11-28 11:43:59,362 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-11-28 11:43:59,362 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 11:43:59,362 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 11:43:59,362 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 11:43:59,363 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 11:43:59,363 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 11:43:59,363 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 11:43:59,363 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 11:43:59,363 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 11:43:59,363 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 11:43:59,363 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 11:43:59,364 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 11:43:59,364 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 11:43:59,364 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_ec8a2eb5-939a-4f2a-bb2b-ef36099495b7/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 [2018-11-28 11:43:59,386 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 11:43:59,393 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 11:43:59,396 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 11:43:59,397 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 11:43:59,397 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 11:43:59,397 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_ec8a2eb5-939a-4f2a-bb2b-ef36099495b7/bin-2019/uautomizer/../../sv-benchmarks/c/memsafety-ext3/scopes3_false-valid-deref.c [2018-11-28 11:43:59,436 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_ec8a2eb5-939a-4f2a-bb2b-ef36099495b7/bin-2019/uautomizer/data/0b24c69dc/60ab6d7d54904762b2900c41f118dbc5/FLAG7519630ef [2018-11-28 11:43:59,769 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 11:43:59,770 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_ec8a2eb5-939a-4f2a-bb2b-ef36099495b7/sv-benchmarks/c/memsafety-ext3/scopes3_false-valid-deref.c [2018-11-28 11:43:59,774 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_ec8a2eb5-939a-4f2a-bb2b-ef36099495b7/bin-2019/uautomizer/data/0b24c69dc/60ab6d7d54904762b2900c41f118dbc5/FLAG7519630ef [2018-11-28 11:43:59,787 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_ec8a2eb5-939a-4f2a-bb2b-ef36099495b7/bin-2019/uautomizer/data/0b24c69dc/60ab6d7d54904762b2900c41f118dbc5 [2018-11-28 11:43:59,789 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 11:43:59,791 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-28 11:43:59,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 11:43:59,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 11:43:59,794 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 11:43:59,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:43:59" (1/1) ... [2018-11-28 11:43:59,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@158ddca1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:43:59, skipping insertion in model container [2018-11-28 11:43:59,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:43:59" (1/1) ... [2018-11-28 11:43:59,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 11:43:59,816 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 11:43:59,930 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 11:43:59,937 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 11:43:59,946 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 11:43:59,957 INFO L195 MainTranslator]: Completed translation [2018-11-28 11:43:59,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:43:59 WrapperNode [2018-11-28 11:43:59,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 11:43:59,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 11:43:59,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 11:43:59,958 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 11:43:59,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:43:59" (1/1) ... [2018-11-28 11:43:59,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:43:59" (1/1) ... [2018-11-28 11:43:59,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:43:59" (1/1) ... [2018-11-28 11:43:59,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:43:59" (1/1) ... [2018-11-28 11:43:59,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:43:59" (1/1) ... [2018-11-28 11:43:59,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:43:59" (1/1) ... [2018-11-28 11:43:59,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:43:59" (1/1) ... [2018-11-28 11:43:59,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 11:43:59,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 11:43:59,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 11:43:59,979 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 11:43:59,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:43:59" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ec8a2eb5-939a-4f2a-bb2b-ef36099495b7/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 [2018-11-28 11:44:00,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 11:44:00,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 11:44:00,048 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 11:44:00,049 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 11:44:00,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-28 11:44:00,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-28 11:44:00,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-28 11:44:00,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 11:44:00,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 11:44:00,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-28 11:44:00,153 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 11:44:00,153 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-11-28 11:44:00,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:44:00 BoogieIcfgContainer [2018-11-28 11:44:00,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 11:44:00,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 11:44:00,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 11:44:00,156 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 11:44:00,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:43:59" (1/3) ... [2018-11-28 11:44:00,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50494051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:44:00, skipping insertion in model container [2018-11-28 11:44:00,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:43:59" (2/3) ... [2018-11-28 11:44:00,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50494051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:44:00, skipping insertion in model container [2018-11-28 11:44:00,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:44:00" (3/3) ... [2018-11-28 11:44:00,159 INFO L112 eAbstractionObserver]: Analyzing ICFG scopes3_false-valid-deref.c [2018-11-28 11:44:00,165 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 11:44:00,169 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-11-28 11:44:00,178 INFO L257 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2018-11-28 11:44:00,195 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 11:44:00,196 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 11:44:00,196 INFO L383 AbstractCegarLoop]: Hoare is false [2018-11-28 11:44:00,196 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 11:44:00,196 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 11:44:00,197 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 11:44:00,197 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 11:44:00,197 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 11:44:00,197 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 11:44:00,207 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-28 11:44:00,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-11-28 11:44:00,214 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:44:00,214 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:44:00,216 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-28 11:44:00,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:44:00,221 INFO L82 PathProgramCache]: Analyzing trace with hash -197094901, now seen corresponding path program 1 times [2018-11-28 11:44:00,222 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:44:00,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:44:00,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:00,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:44:00,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:44:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:44:00,296 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 11:44:00,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 11:44:00,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-28 11:44:00,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-28 11:44:00,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-28 11:44:00,308 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-11-28 11:44:00,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:44:00,318 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-11-28 11:44:00,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-28 11:44:00,319 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2018-11-28 11:44:00,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:44:00,324 INFO L225 Difference]: With dead ends: 20 [2018-11-28 11:44:00,324 INFO L226 Difference]: Without dead ends: 17 [2018-11-28 11:44:00,325 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 [2018-11-28 11:44:00,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-11-28 11:44:00,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-11-28 11:44:00,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-28 11:44:00,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-11-28 11:44:00,347 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 8 [2018-11-28 11:44:00,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:44:00,347 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-11-28 11:44:00,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-28 11:44:00,347 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-11-28 11:44:00,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-11-28 11:44:00,348 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:44:00,348 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:44:00,348 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-28 11:44:00,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:44:00,348 INFO L82 PathProgramCache]: Analyzing trace with hash -197095180, now seen corresponding path program 1 times [2018-11-28 11:44:00,348 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:44:00,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:44:00,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:00,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:44:00,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:44:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:44:00,380 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 11:44:00,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 11:44:00,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 11:44:00,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 11:44:00,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 11:44:00,381 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 3 states. [2018-11-28 11:44:00,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:44:00,409 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-11-28 11:44:00,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 11:44:00,409 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-11-28 11:44:00,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:44:00,410 INFO L225 Difference]: With dead ends: 22 [2018-11-28 11:44:00,410 INFO L226 Difference]: Without dead ends: 22 [2018-11-28 11:44:00,411 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 [2018-11-28 11:44:00,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-28 11:44:00,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2018-11-28 11:44:00,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-28 11:44:00,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-11-28 11:44:00,413 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 8 [2018-11-28 11:44:00,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:44:00,413 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-11-28 11:44:00,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 11:44:00,413 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-11-28 11:44:00,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-11-28 11:44:00,414 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:44:00,414 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:44:00,414 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-28 11:44:00,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:44:00,414 INFO L82 PathProgramCache]: Analyzing trace with hash -197095125, now seen corresponding path program 1 times [2018-11-28 11:44:00,414 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:44:00,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:44:00,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:00,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:44:00,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:00,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:44:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:44:00,446 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 11:44:00,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 11:44:00,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 11:44:00,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 11:44:00,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 11:44:00,447 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 3 states. [2018-11-28 11:44:00,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:44:00,463 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-11-28 11:44:00,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 11:44:00,464 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-11-28 11:44:00,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:44:00,464 INFO L225 Difference]: With dead ends: 16 [2018-11-28 11:44:00,464 INFO L226 Difference]: Without dead ends: 16 [2018-11-28 11:44:00,465 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 [2018-11-28 11:44:00,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-11-28 11:44:00,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-11-28 11:44:00,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-28 11:44:00,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-11-28 11:44:00,467 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 8 [2018-11-28 11:44:00,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:44:00,467 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-11-28 11:44:00,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 11:44:00,468 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-11-28 11:44:00,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-11-28 11:44:00,468 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:44:00,468 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:44:00,468 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-28 11:44:00,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:44:00,468 INFO L82 PathProgramCache]: Analyzing trace with hash -197095126, now seen corresponding path program 1 times [2018-11-28 11:44:00,468 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:44:00,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:44:00,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:00,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:44:00,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:44:00,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:44:00,490 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 11:44:00,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 11:44:00,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 11:44:00,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 11:44:00,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 11:44:00,490 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2018-11-28 11:44:00,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:44:00,506 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-11-28 11:44:00,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 11:44:00,506 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-11-28 11:44:00,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:44:00,507 INFO L225 Difference]: With dead ends: 15 [2018-11-28 11:44:00,507 INFO L226 Difference]: Without dead ends: 15 [2018-11-28 11:44:00,507 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 [2018-11-28 11:44:00,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-11-28 11:44:00,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-11-28 11:44:00,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-28 11:44:00,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-11-28 11:44:00,509 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2018-11-28 11:44:00,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:44:00,509 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-11-28 11:44:00,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 11:44:00,509 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-11-28 11:44:00,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-28 11:44:00,509 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:44:00,509 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:44:00,510 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-28 11:44:00,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:44:00,510 INFO L82 PathProgramCache]: Analyzing trace with hash -440617163, now seen corresponding path program 1 times [2018-11-28 11:44:00,510 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:44:00,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:44:00,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:00,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:44:00,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:00,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:44:00,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:44:00,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:44:00,534 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ec8a2eb5-939a-4f2a-bb2b-ef36099495b7/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 [2018-11-28 11:44:00,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:44:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:44:00,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:44:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:44:00,608 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:44:00,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-11-28 11:44:00,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 11:44:00,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 11:44:00,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-28 11:44:00,609 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2018-11-28 11:44:00,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:44:00,625 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-11-28 11:44:00,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 11:44:00,626 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-11-28 11:44:00,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:44:00,626 INFO L225 Difference]: With dead ends: 20 [2018-11-28 11:44:00,627 INFO L226 Difference]: Without dead ends: 20 [2018-11-28 11:44:00,627 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 [2018-11-28 11:44:00,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-11-28 11:44:00,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2018-11-28 11:44:00,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-28 11:44:00,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-11-28 11:44:00,629 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2018-11-28 11:44:00,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:44:00,629 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-11-28 11:44:00,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 11:44:00,630 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-11-28 11:44:00,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-28 11:44:00,630 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:44:00,630 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:44:00,630 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-28 11:44:00,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:44:00,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1004249772, now seen corresponding path program 2 times [2018-11-28 11:44:00,631 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:44:00,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:44:00,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:00,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:44:00,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:44:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:44:00,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:44:00,664 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ec8a2eb5-939a-4f2a-bb2b-ef36099495b7/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 [2018-11-28 11:44:00,671 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 11:44:00,687 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 11:44:00,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:44:00,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:44:00,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:44:00,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:44:00,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-11-28 11:44:00,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 11:44:00,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 11:44:00,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-28 11:44:00,737 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2018-11-28 11:44:00,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:44:00,755 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-11-28 11:44:00,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 11:44:00,755 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2018-11-28 11:44:00,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:44:00,756 INFO L225 Difference]: With dead ends: 23 [2018-11-28 11:44:00,756 INFO L226 Difference]: Without dead ends: 23 [2018-11-28 11:44:00,756 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 [2018-11-28 11:44:00,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-28 11:44:00,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-11-28 11:44:00,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 11:44:00,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-11-28 11:44:00,759 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2018-11-28 11:44:00,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:44:00,759 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-11-28 11:44:00,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 11:44:00,759 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-11-28 11:44:00,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-28 11:44:00,759 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:44:00,760 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:44:00,760 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-28 11:44:00,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:44:00,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1138822869, now seen corresponding path program 3 times [2018-11-28 11:44:00,760 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:44:00,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:44:00,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:00,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:44:00,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:00,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:44:00,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:44:00,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:44:00,824 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ec8a2eb5-939a-4f2a-bb2b-ef36099495b7/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 [2018-11-28 11:44:00,830 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 11:44:00,845 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-28 11:44:00,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:44:00,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:44:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:44:00,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:44:00,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-11-28 11:44:00,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-28 11:44:00,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 11:44:00,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-28 11:44:00,870 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 7 states. [2018-11-28 11:44:00,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:44:00,888 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-11-28 11:44:00,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 11:44:00,889 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2018-11-28 11:44:00,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:44:00,889 INFO L225 Difference]: With dead ends: 26 [2018-11-28 11:44:00,889 INFO L226 Difference]: Without dead ends: 26 [2018-11-28 11:44:00,890 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 [2018-11-28 11:44:00,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-28 11:44:00,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2018-11-28 11:44:00,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-28 11:44:00,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-11-28 11:44:00,892 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 17 [2018-11-28 11:44:00,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:44:00,893 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-11-28 11:44:00,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-28 11:44:00,895 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-11-28 11:44:00,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-28 11:44:00,895 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:44:00,895 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:44:00,896 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-28 11:44:00,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:44:00,896 INFO L82 PathProgramCache]: Analyzing trace with hash 727015860, now seen corresponding path program 4 times [2018-11-28 11:44:00,896 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:44:00,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:44:00,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:00,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:44:00,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:44:00,967 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:44:00,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:44:00,967 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ec8a2eb5-939a-4f2a-bb2b-ef36099495b7/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 [2018-11-28 11:44:00,974 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 11:44:00,985 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 11:44:00,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:44:00,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:44:00,994 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:44:01,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:44:01,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-28 11:44:01,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 11:44:01,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 11:44:01,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-28 11:44:01,010 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 8 states. [2018-11-28 11:44:01,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:44:01,030 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-11-28 11:44:01,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 11:44:01,030 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-11-28 11:44:01,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:44:01,031 INFO L225 Difference]: With dead ends: 29 [2018-11-28 11:44:01,031 INFO L226 Difference]: Without dead ends: 29 [2018-11-28 11:44:01,032 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 [2018-11-28 11:44:01,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-28 11:44:01,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2018-11-28 11:44:01,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-28 11:44:01,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-11-28 11:44:01,034 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 20 [2018-11-28 11:44:01,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:44:01,034 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-11-28 11:44:01,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 11:44:01,035 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-11-28 11:44:01,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-28 11:44:01,035 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:44:01,035 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:44:01,035 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-28 11:44:01,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:44:01,036 INFO L82 PathProgramCache]: Analyzing trace with hash -988991883, now seen corresponding path program 5 times [2018-11-28 11:44:01,036 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:44:01,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:44:01,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:01,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:44:01,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:44:01,094 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:44:01,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:44:01,094 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ec8a2eb5-939a-4f2a-bb2b-ef36099495b7/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 [2018-11-28 11:44:01,100 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 11:44:01,122 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-28 11:44:01,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:44:01,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:44:01,134 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:44:01,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:44:01,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-28 11:44:01,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 11:44:01,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 11:44:01,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-28 11:44:01,154 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 9 states. [2018-11-28 11:44:01,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:44:01,184 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-11-28 11:44:01,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 11:44:01,186 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2018-11-28 11:44:01,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:44:01,187 INFO L225 Difference]: With dead ends: 32 [2018-11-28 11:44:01,187 INFO L226 Difference]: Without dead ends: 32 [2018-11-28 11:44:01,187 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 [2018-11-28 11:44:01,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-28 11:44:01,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-11-28 11:44:01,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-28 11:44:01,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-11-28 11:44:01,191 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 23 [2018-11-28 11:44:01,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:44:01,192 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-11-28 11:44:01,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 11:44:01,192 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-11-28 11:44:01,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-28 11:44:01,192 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:44:01,193 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:44:01,193 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-28 11:44:01,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:44:01,193 INFO L82 PathProgramCache]: Analyzing trace with hash 420060692, now seen corresponding path program 6 times [2018-11-28 11:44:01,193 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:44:01,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:44:01,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:01,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:44:01,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:44:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:44:01,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:44:01,268 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ec8a2eb5-939a-4f2a-bb2b-ef36099495b7/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 [2018-11-28 11:44:01,281 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 11:44:01,318 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-28 11:44:01,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:44:01,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:44:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:44:01,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:44:01,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-28 11:44:01,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 11:44:01,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 11:44:01,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-28 11:44:01,382 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 10 states. [2018-11-28 11:44:01,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:44:01,427 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-11-28 11:44:01,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 11:44:01,428 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2018-11-28 11:44:01,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:44:01,429 INFO L225 Difference]: With dead ends: 35 [2018-11-28 11:44:01,429 INFO L226 Difference]: Without dead ends: 35 [2018-11-28 11:44:01,429 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 [2018-11-28 11:44:01,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-11-28 11:44:01,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2018-11-28 11:44:01,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-28 11:44:01,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-11-28 11:44:01,433 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 26 [2018-11-28 11:44:01,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:44:01,433 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-11-28 11:44:01,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 11:44:01,433 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-11-28 11:44:01,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-28 11:44:01,434 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:44:01,434 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:44:01,434 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-28 11:44:01,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:44:01,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1505028587, now seen corresponding path program 7 times [2018-11-28 11:44:01,434 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:44:01,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:44:01,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:01,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:44:01,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:01,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:44:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:44:01,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:44:01,617 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ec8a2eb5-939a-4f2a-bb2b-ef36099495b7/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 [2018-11-28 11:44:01,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:44:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:44:01,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:44:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:44:01,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:44:01,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-28 11:44:01,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 11:44:01,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 11:44:01,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-28 11:44:01,680 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 11 states. [2018-11-28 11:44:01,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:44:01,714 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-11-28 11:44:01,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 11:44:01,717 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-11-28 11:44:01,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:44:01,718 INFO L225 Difference]: With dead ends: 38 [2018-11-28 11:44:01,718 INFO L226 Difference]: Without dead ends: 38 [2018-11-28 11:44:01,718 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-28 11:44:01,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-28 11:44:01,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2018-11-28 11:44:01,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-28 11:44:01,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-11-28 11:44:01,721 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 29 [2018-11-28 11:44:01,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:44:01,721 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-11-28 11:44:01,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 11:44:01,722 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-11-28 11:44:01,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-28 11:44:01,722 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:44:01,722 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:44:01,722 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-28 11:44:01,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:44:01,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1141435788, now seen corresponding path program 8 times [2018-11-28 11:44:01,723 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:44:01,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:44:01,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:01,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:44:01,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:44:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:44:01,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:44:01,810 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ec8a2eb5-939a-4f2a-bb2b-ef36099495b7/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 [2018-11-28 11:44:01,824 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 11:44:01,851 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 11:44:01,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:44:01,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:44:01,878 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:44:01,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:44:01,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-28 11:44:01,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 11:44:01,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 11:44:01,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-28 11:44:01,894 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 12 states. [2018-11-28 11:44:01,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:44:01,919 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-11-28 11:44:01,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 11:44:01,920 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2018-11-28 11:44:01,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:44:01,921 INFO L225 Difference]: With dead ends: 41 [2018-11-28 11:44:01,921 INFO L226 Difference]: Without dead ends: 41 [2018-11-28 11:44:01,921 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 [2018-11-28 11:44:01,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-28 11:44:01,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2018-11-28 11:44:01,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-28 11:44:01,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-11-28 11:44:01,924 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 32 [2018-11-28 11:44:01,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:44:01,925 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-11-28 11:44:01,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 11:44:01,927 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-11-28 11:44:01,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-28 11:44:01,928 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:44:01,928 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:44:01,929 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-28 11:44:01,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:44:01,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1255881291, now seen corresponding path program 9 times [2018-11-28 11:44:01,930 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:44:01,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:44:01,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:01,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:44:01,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:01,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:44:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:44:02,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:44:02,013 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ec8a2eb5-939a-4f2a-bb2b-ef36099495b7/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 [2018-11-28 11:44:02,021 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 11:44:02,056 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-28 11:44:02,056 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:44:02,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:44:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:44:02,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:44:02,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-28 11:44:02,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 11:44:02,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 11:44:02,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-28 11:44:02,089 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 13 states. [2018-11-28 11:44:02,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:44:02,115 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-11-28 11:44:02,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 11:44:02,116 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2018-11-28 11:44:02,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:44:02,116 INFO L225 Difference]: With dead ends: 42 [2018-11-28 11:44:02,116 INFO L226 Difference]: Without dead ends: 42 [2018-11-28 11:44:02,116 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 [2018-11-28 11:44:02,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-28 11:44:02,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-28 11:44:02,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-28 11:44:02,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-11-28 11:44:02,118 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 35 [2018-11-28 11:44:02,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:44:02,119 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-11-28 11:44:02,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 11:44:02,119 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-11-28 11:44:02,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-11-28 11:44:02,119 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:44:02,119 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:44:02,119 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-28 11:44:02,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:44:02,120 INFO L82 PathProgramCache]: Analyzing trace with hash -497828140, now seen corresponding path program 10 times [2018-11-28 11:44:02,120 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:44:02,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:44:02,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:02,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:44:02,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:44:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:44:02,182 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-11-28 11:44:02,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 11:44:02 BoogieIcfgContainer [2018-11-28 11:44:02,207 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 11:44:02,207 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 11:44:02,207 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 11:44:02,207 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 11:44:02,208 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:44:00" (3/4) ... [2018-11-28 11:44:02,210 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-28 11:44:02,257 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_ec8a2eb5-939a-4f2a-bb2b-ef36099495b7/bin-2019/uautomizer/witness.graphml [2018-11-28 11:44:02,258 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 11:44:02,258 INFO L168 Benchmark]: Toolchain (without parser) took 2468.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.0 MB). Free memory was 954.0 MB in the beginning and 836.8 MB in the end (delta: 117.2 MB). Peak memory consumption was 269.3 MB. Max. memory is 11.5 GB. [2018-11-28 11:44:02,260 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 979.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 11:44:02,260 INFO L168 Benchmark]: CACSL2BoogieTranslator took 166.29 ms. Allocated memory is still 1.0 GB. Free memory was 954.0 MB in the beginning and 943.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 11:44:02,260 INFO L168 Benchmark]: Boogie Preprocessor took 21.08 ms. Allocated memory is still 1.0 GB. Free memory is still 943.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 11:44:02,260 INFO L168 Benchmark]: RCFGBuilder took 174.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.0 MB). Free memory was 943.3 MB in the beginning and 1.1 GB in the end (delta: -193.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 11.5 GB. [2018-11-28 11:44:02,261 INFO L168 Benchmark]: TraceAbstraction took 2052.57 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 836.8 MB in the end (delta: 299.5 MB). Peak memory consumption was 299.5 MB. Max. memory is 11.5 GB. [2018-11-28 11:44:02,261 INFO L168 Benchmark]: Witness Printer took 50.58 ms. Allocated memory is still 1.2 GB. Free memory is still 836.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 11:44:02,263 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 979.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 166.29 ms. Allocated memory is still 1.0 GB. Free memory was 954.0 MB in the beginning and 943.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.08 ms. Allocated memory is still 1.0 GB. Free memory is still 943.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 174.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.0 MB). Free memory was 943.3 MB in the beginning and 1.1 GB in the end (delta: -193.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2052.57 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 836.8 MB in the end (delta: 299.5 MB). Peak memory consumption was 299.5 MB. Max. memory is 11.5 GB. * Witness Printer took 50.58 ms. Allocated memory is still 1.2 GB. Free memory is still 836.8 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, 2.0s OverallTime, 14 OverallIterations, 10 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 165 SDtfs, 123 SDslu, 422 SDs, 0 SdLazy, 189 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 279 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s 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, 0.8s 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...