./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/scopes3_false-valid-deref.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_e4e9db87-1398-46b8-be8a-b43879f1d406/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e4e9db87-1398-46b8-be8a-b43879f1d406/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e4e9db87-1398-46b8-be8a-b43879f1d406/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e4e9db87-1398-46b8-be8a-b43879f1d406/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_e4e9db87-1398-46b8-be8a-b43879f1d406/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e4e9db87-1398-46b8-be8a-b43879f1d406/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7efcb16e512d7de15a71f6cd895dcd8493c4b646 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 11:25:56,160 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 11:25:56,161 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 11:25:56,169 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 11:25:56,169 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 11:25:56,169 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 11:25:56,170 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 11:25:56,171 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 11:25:56,171 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 11:25:56,172 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 11:25:56,173 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 11:25:56,173 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 11:25:56,173 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 11:25:56,174 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 11:25:56,174 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 11:25:56,175 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 11:25:56,175 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 11:25:56,176 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 11:25:56,177 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 11:25:56,178 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 11:25:56,178 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 11:25:56,179 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 11:25:56,180 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 11:25:56,180 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 11:25:56,180 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 11:25:56,181 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 11:25:56,181 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 11:25:56,182 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 11:25:56,182 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 11:25:56,183 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 11:25:56,183 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 11:25:56,184 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 11:25:56,184 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 11:25:56,184 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 11:25:56,185 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 11:25:56,185 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 11:25:56,185 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e4e9db87-1398-46b8-be8a-b43879f1d406/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2018-12-08 11:25:56,193 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 11:25:56,193 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 11:25:56,194 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 11:25:56,194 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 11:25:56,194 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-08 11:25:56,194 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-08 11:25:56,195 INFO L133 SettingsManager]: * Use SBE=true [2018-12-08 11:25:56,195 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 11:25:56,195 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 11:25:56,195 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-08 11:25:56,195 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 11:25:56,195 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 11:25:56,196 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 11:25:56,196 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-08 11:25:56,196 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-08 11:25:56,196 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-08 11:25:56,196 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 11:25:56,196 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 11:25:56,196 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-08 11:25:56,197 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 11:25:56,197 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 11:25:56,197 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 11:25:56,197 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 11:25:56,197 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 11:25:56,197 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 11:25:56,198 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 11:25:56,198 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-08 11:25:56,198 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 11:25:56,198 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_e4e9db87-1398-46b8-be8a-b43879f1d406/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7efcb16e512d7de15a71f6cd895dcd8493c4b646 [2018-12-08 11:25:56,222 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 11:25:56,231 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 11:25:56,233 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 11:25:56,234 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 11:25:56,235 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 11:25:56,235 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e4e9db87-1398-46b8-be8a-b43879f1d406/bin-2019/uautomizer/../../sv-benchmarks/c/memsafety-ext3/scopes3_false-valid-deref.c [2018-12-08 11:25:56,277 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e4e9db87-1398-46b8-be8a-b43879f1d406/bin-2019/uautomizer/data/fc02fa0b3/0a6575b8ec0a41aa98c142c91bfe633e/FLAGc56cbd4c8 [2018-12-08 11:25:56,587 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 11:25:56,588 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e4e9db87-1398-46b8-be8a-b43879f1d406/sv-benchmarks/c/memsafety-ext3/scopes3_false-valid-deref.c [2018-12-08 11:25:56,592 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e4e9db87-1398-46b8-be8a-b43879f1d406/bin-2019/uautomizer/data/fc02fa0b3/0a6575b8ec0a41aa98c142c91bfe633e/FLAGc56cbd4c8 [2018-12-08 11:25:56,603 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e4e9db87-1398-46b8-be8a-b43879f1d406/bin-2019/uautomizer/data/fc02fa0b3/0a6575b8ec0a41aa98c142c91bfe633e [2018-12-08 11:25:56,605 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 11:25:56,606 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-12-08 11:25:56,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 11:25:56,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 11:25:56,609 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 11:25:56,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 11:25:56" (1/1) ... [2018-12-08 11:25:56,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44a63a5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:25:56, skipping insertion in model container [2018-12-08 11:25:56,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 11:25:56" (1/1) ... [2018-12-08 11:25:56,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 11:25:56,623 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 11:25:56,705 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 11:25:56,712 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 11:25:56,721 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 11:25:56,729 INFO L195 MainTranslator]: Completed translation [2018-12-08 11:25:56,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:25:56 WrapperNode [2018-12-08 11:25:56,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 11:25:56,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 11:25:56,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 11:25:56,730 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 11:25:56,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:25:56" (1/1) ... [2018-12-08 11:25:56,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:25:56" (1/1) ... [2018-12-08 11:25:56,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:25:56" (1/1) ... [2018-12-08 11:25:56,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:25:56" (1/1) ... [2018-12-08 11:25:56,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:25:56" (1/1) ... [2018-12-08 11:25:56,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:25:56" (1/1) ... [2018-12-08 11:25:56,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:25:56" (1/1) ... [2018-12-08 11:25:56,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 11:25:56,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 11:25:56,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 11:25:56,749 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 11:25:56,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:25:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e4e9db87-1398-46b8-be8a-b43879f1d406/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 11:25:56,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 11:25:56,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 11:25:56,807 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 11:25:56,807 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 11:25:56,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-08 11:25:56,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-08 11:25:56,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-08 11:25:56,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 11:25:56,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 11:25:56,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-08 11:25:56,896 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 11:25:56,896 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-08 11:25:56,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 11:25:56 BoogieIcfgContainer [2018-12-08 11:25:56,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 11:25:56,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 11:25:56,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 11:25:56,899 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 11:25:56,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 11:25:56" (1/3) ... [2018-12-08 11:25:56,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aacd3de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 11:25:56, skipping insertion in model container [2018-12-08 11:25:56,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:25:56" (2/3) ... [2018-12-08 11:25:56,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aacd3de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 11:25:56, skipping insertion in model container [2018-12-08 11:25:56,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 11:25:56" (3/3) ... [2018-12-08 11:25:56,900 INFO L112 eAbstractionObserver]: Analyzing ICFG scopes3_false-valid-deref.c [2018-12-08 11:25:56,906 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 11:25:56,910 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-12-08 11:25:56,918 INFO L257 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2018-12-08 11:25:56,932 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-08 11:25:56,932 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 11:25:56,932 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-08 11:25:56,933 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 11:25:56,933 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 11:25:56,933 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 11:25:56,933 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 11:25:56,933 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 11:25:56,933 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 11:25:56,941 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-12-08 11:25:56,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-08 11:25:56,946 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:25:56,947 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:25:56,948 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-12-08 11:25:56,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:25:56,951 INFO L82 PathProgramCache]: Analyzing trace with hash -197094901, now seen corresponding path program 1 times [2018-12-08 11:25:56,953 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:25:56,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:25:56,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:56,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 11:25:56,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:25:57,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:25:57,020 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 11:25:57,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-08 11:25:57,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-08 11:25:57,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-08 11:25:57,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-08 11:25:57,031 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-12-08 11:25:57,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:25:57,040 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-12-08 11:25:57,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-08 11:25:57,040 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2018-12-08 11:25:57,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:25:57,045 INFO L225 Difference]: With dead ends: 20 [2018-12-08 11:25:57,045 INFO L226 Difference]: Without dead ends: 17 [2018-12-08 11:25:57,046 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-08 11:25:57,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-12-08 11:25:57,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-12-08 11:25:57,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-08 11:25:57,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-12-08 11:25:57,066 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 8 [2018-12-08 11:25:57,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:25:57,066 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-12-08 11:25:57,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-08 11:25:57,066 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-12-08 11:25:57,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-08 11:25:57,066 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:25:57,066 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:25:57,067 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-12-08 11:25:57,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:25:57,067 INFO L82 PathProgramCache]: Analyzing trace with hash -197095180, now seen corresponding path program 1 times [2018-12-08 11:25:57,067 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:25:57,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:25:57,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:57,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 11:25:57,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:25:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:25:57,089 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 11:25:57,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-08 11:25:57,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-08 11:25:57,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-08 11:25:57,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 11:25:57,090 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 3 states. [2018-12-08 11:25:57,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:25:57,110 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-12-08 11:25:57,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-08 11:25:57,110 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-12-08 11:25:57,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:25:57,110 INFO L225 Difference]: With dead ends: 22 [2018-12-08 11:25:57,111 INFO L226 Difference]: Without dead ends: 22 [2018-12-08 11:25:57,111 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 11:25:57,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-08 11:25:57,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2018-12-08 11:25:57,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-08 11:25:57,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-12-08 11:25:57,113 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 8 [2018-12-08 11:25:57,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:25:57,113 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-12-08 11:25:57,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-08 11:25:57,114 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-12-08 11:25:57,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-08 11:25:57,114 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:25:57,114 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:25:57,114 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-12-08 11:25:57,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:25:57,114 INFO L82 PathProgramCache]: Analyzing trace with hash -197095125, now seen corresponding path program 1 times [2018-12-08 11:25:57,114 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:25:57,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:25:57,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:57,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 11:25:57,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:25:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:25:57,141 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 11:25:57,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-08 11:25:57,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-08 11:25:57,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-08 11:25:57,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 11:25:57,141 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 3 states. [2018-12-08 11:25:57,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:25:57,151 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-12-08 11:25:57,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-08 11:25:57,152 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-12-08 11:25:57,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:25:57,152 INFO L225 Difference]: With dead ends: 16 [2018-12-08 11:25:57,152 INFO L226 Difference]: Without dead ends: 16 [2018-12-08 11:25:57,153 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 11:25:57,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-12-08 11:25:57,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-12-08 11:25:57,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-08 11:25:57,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-12-08 11:25:57,154 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 8 [2018-12-08 11:25:57,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:25:57,154 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-12-08 11:25:57,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-08 11:25:57,154 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-12-08 11:25:57,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-08 11:25:57,155 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:25:57,155 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:25:57,155 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-12-08 11:25:57,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:25:57,155 INFO L82 PathProgramCache]: Analyzing trace with hash -197095126, now seen corresponding path program 1 times [2018-12-08 11:25:57,155 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:25:57,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:25:57,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:57,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 11:25:57,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:25:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:25:57,172 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 11:25:57,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-08 11:25:57,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-08 11:25:57,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-08 11:25:57,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 11:25:57,173 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2018-12-08 11:25:57,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:25:57,183 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-12-08 11:25:57,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-08 11:25:57,183 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-12-08 11:25:57,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:25:57,184 INFO L225 Difference]: With dead ends: 15 [2018-12-08 11:25:57,184 INFO L226 Difference]: Without dead ends: 15 [2018-12-08 11:25:57,184 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 11:25:57,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-12-08 11:25:57,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-12-08 11:25:57,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-08 11:25:57,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-12-08 11:25:57,185 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2018-12-08 11:25:57,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:25:57,185 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-12-08 11:25:57,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-08 11:25:57,186 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-12-08 11:25:57,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-08 11:25:57,186 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:25:57,186 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:25:57,186 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-12-08 11:25:57,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:25:57,186 INFO L82 PathProgramCache]: Analyzing trace with hash -440617163, now seen corresponding path program 1 times [2018-12-08 11:25:57,186 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:25:57,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:25:57,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:57,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 11:25:57,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:25:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:25:57,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 11:25:57,214 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e4e9db87-1398-46b8-be8a-b43879f1d406/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 11:25:57,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 11:25:57,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:25:57,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 11:25:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:25:57,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 11:25:57,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-12-08 11:25:57,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 11:25:57,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 11:25:57,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-12-08 11:25:57,276 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2018-12-08 11:25:57,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:25:57,287 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-12-08 11:25:57,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-08 11:25:57,288 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-12-08 11:25:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:25:57,288 INFO L225 Difference]: With dead ends: 20 [2018-12-08 11:25:57,288 INFO L226 Difference]: Without dead ends: 20 [2018-12-08 11:25:57,289 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-12-08 11:25:57,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-08 11:25:57,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2018-12-08 11:25:57,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-08 11:25:57,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-12-08 11:25:57,291 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2018-12-08 11:25:57,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:25:57,291 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-12-08 11:25:57,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 11:25:57,291 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-12-08 11:25:57,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-08 11:25:57,291 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:25:57,292 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:25:57,292 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-12-08 11:25:57,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:25:57,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1004249772, now seen corresponding path program 2 times [2018-12-08 11:25:57,292 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:25:57,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:25:57,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:57,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 11:25:57,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:57,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:25:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:25:57,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 11:25:57,321 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e4e9db87-1398-46b8-be8a-b43879f1d406/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 11:25:57,327 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 11:25:57,340 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 11:25:57,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 11:25:57,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 11:25:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:25:57,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 11:25:57,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-12-08 11:25:57,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 11:25:57,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 11:25:57,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-08 11:25:57,363 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2018-12-08 11:25:57,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:25:57,377 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-12-08 11:25:57,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 11:25:57,377 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2018-12-08 11:25:57,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:25:57,378 INFO L225 Difference]: With dead ends: 23 [2018-12-08 11:25:57,378 INFO L226 Difference]: Without dead ends: 23 [2018-12-08 11:25:57,379 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-08 11:25:57,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-08 11:25:57,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-12-08 11:25:57,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-08 11:25:57,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-12-08 11:25:57,381 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2018-12-08 11:25:57,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:25:57,381 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-12-08 11:25:57,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 11:25:57,382 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-12-08 11:25:57,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-08 11:25:57,382 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:25:57,382 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:25:57,382 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-12-08 11:25:57,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:25:57,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1138822869, now seen corresponding path program 3 times [2018-12-08 11:25:57,383 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:25:57,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:25:57,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:57,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 11:25:57,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:25:57,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:25:57,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 11:25:57,426 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e4e9db87-1398-46b8-be8a-b43879f1d406/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 11:25:57,432 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 11:25:57,445 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-08 11:25:57,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 11:25:57,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 11:25:57,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:25:57,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 11:25:57,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-12-08 11:25:57,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-08 11:25:57,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-08 11:25:57,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-12-08 11:25:57,468 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 7 states. [2018-12-08 11:25:57,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:25:57,482 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-12-08 11:25:57,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 11:25:57,482 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2018-12-08 11:25:57,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:25:57,482 INFO L225 Difference]: With dead ends: 26 [2018-12-08 11:25:57,482 INFO L226 Difference]: Without dead ends: 26 [2018-12-08 11:25:57,483 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-12-08 11:25:57,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-08 11:25:57,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2018-12-08 11:25:57,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-08 11:25:57,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-12-08 11:25:57,484 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 17 [2018-12-08 11:25:57,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:25:57,485 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-12-08 11:25:57,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-08 11:25:57,485 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-12-08 11:25:57,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-08 11:25:57,485 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:25:57,485 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:25:57,485 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-12-08 11:25:57,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:25:57,485 INFO L82 PathProgramCache]: Analyzing trace with hash 727015860, now seen corresponding path program 4 times [2018-12-08 11:25:57,485 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:25:57,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:25:57,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:57,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 11:25:57,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:25:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:25:57,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 11:25:57,521 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e4e9db87-1398-46b8-be8a-b43879f1d406/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 11:25:57,527 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 11:25:57,536 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 11:25:57,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 11:25:57,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 11:25:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:25:57,558 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 11:25:57,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-12-08 11:25:57,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-08 11:25:57,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-08 11:25:57,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-08 11:25:57,559 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 8 states. [2018-12-08 11:25:57,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:25:57,572 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-12-08 11:25:57,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 11:25:57,572 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-12-08 11:25:57,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:25:57,573 INFO L225 Difference]: With dead ends: 29 [2018-12-08 11:25:57,573 INFO L226 Difference]: Without dead ends: 29 [2018-12-08 11:25:57,573 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-08 11:25:57,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-08 11:25:57,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2018-12-08 11:25:57,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-08 11:25:57,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-12-08 11:25:57,575 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 20 [2018-12-08 11:25:57,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:25:57,575 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-12-08 11:25:57,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-08 11:25:57,575 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-12-08 11:25:57,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-08 11:25:57,575 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:25:57,575 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:25:57,575 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-12-08 11:25:57,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:25:57,576 INFO L82 PathProgramCache]: Analyzing trace with hash -988991883, now seen corresponding path program 5 times [2018-12-08 11:25:57,576 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:25:57,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:25:57,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:57,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 11:25:57,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:25:57,618 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:25:57,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 11:25:57,619 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e4e9db87-1398-46b8-be8a-b43879f1d406/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 11:25:57,627 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 11:25:57,653 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-12-08 11:25:57,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 11:25:57,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 11:25:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:25:57,684 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 11:25:57,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-12-08 11:25:57,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 11:25:57,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 11:25:57,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-12-08 11:25:57,685 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 9 states. [2018-12-08 11:25:57,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:25:57,706 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-12-08 11:25:57,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-08 11:25:57,706 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2018-12-08 11:25:57,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:25:57,707 INFO L225 Difference]: With dead ends: 32 [2018-12-08 11:25:57,707 INFO L226 Difference]: Without dead ends: 32 [2018-12-08 11:25:57,707 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-12-08 11:25:57,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-08 11:25:57,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-12-08 11:25:57,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-08 11:25:57,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-12-08 11:25:57,709 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 23 [2018-12-08 11:25:57,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:25:57,709 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-12-08 11:25:57,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 11:25:57,710 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-12-08 11:25:57,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-08 11:25:57,710 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:25:57,710 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:25:57,710 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-12-08 11:25:57,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:25:57,710 INFO L82 PathProgramCache]: Analyzing trace with hash 420060692, now seen corresponding path program 6 times [2018-12-08 11:25:57,710 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:25:57,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:25:57,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:57,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 11:25:57,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:57,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:25:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:25:57,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 11:25:57,780 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e4e9db87-1398-46b8-be8a-b43879f1d406/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 11:25:57,786 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 11:25:57,809 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-12-08 11:25:57,809 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 11:25:57,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 11:25:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:25:57,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 11:25:57,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-12-08 11:25:57,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-08 11:25:57,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-08 11:25:57,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-08 11:25:57,838 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 10 states. [2018-12-08 11:25:57,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:25:57,861 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-12-08 11:25:57,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-08 11:25:57,862 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2018-12-08 11:25:57,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:25:57,862 INFO L225 Difference]: With dead ends: 35 [2018-12-08 11:25:57,862 INFO L226 Difference]: Without dead ends: 35 [2018-12-08 11:25:57,863 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-08 11:25:57,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-08 11:25:57,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2018-12-08 11:25:57,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-08 11:25:57,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-12-08 11:25:57,865 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 26 [2018-12-08 11:25:57,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:25:57,866 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-12-08 11:25:57,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-08 11:25:57,866 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-12-08 11:25:57,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-08 11:25:57,866 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:25:57,866 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:25:57,867 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-12-08 11:25:57,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:25:57,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1505028587, now seen corresponding path program 7 times [2018-12-08 11:25:57,867 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:25:57,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:25:57,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:57,868 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 11:25:57,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:25:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:25:57,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 11:25:57,941 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e4e9db87-1398-46b8-be8a-b43879f1d406/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 11:25:57,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 11:25:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:25:57,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 11:25:57,980 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:25:58,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 11:25:58,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-12-08 11:25:58,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-08 11:25:58,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 11:25:58,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-08 11:25:58,005 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 11 states. [2018-12-08 11:25:58,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:25:58,030 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-12-08 11:25:58,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-08 11:25:58,031 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-12-08 11:25:58,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:25:58,031 INFO L225 Difference]: With dead ends: 38 [2018-12-08 11:25:58,031 INFO L226 Difference]: Without dead ends: 38 [2018-12-08 11:25:58,032 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-08 11:25:58,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-08 11:25:58,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2018-12-08 11:25:58,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-12-08 11:25:58,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-12-08 11:25:58,034 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 29 [2018-12-08 11:25:58,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:25:58,034 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-12-08 11:25:58,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-08 11:25:58,035 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-12-08 11:25:58,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-12-08 11:25:58,035 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:25:58,035 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:25:58,035 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-12-08 11:25:58,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:25:58,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1141435788, now seen corresponding path program 8 times [2018-12-08 11:25:58,036 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:25:58,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:25:58,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:58,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 11:25:58,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:25:58,100 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:25:58,100 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 11:25:58,101 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e4e9db87-1398-46b8-be8a-b43879f1d406/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 11:25:58,106 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 11:25:58,125 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 11:25:58,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 11:25:58,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 11:25:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:25:58,152 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 11:25:58,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-12-08 11:25:58,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-08 11:25:58,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-08 11:25:58,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-08 11:25:58,153 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 12 states. [2018-12-08 11:25:58,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:25:58,176 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-12-08 11:25:58,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-08 11:25:58,180 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2018-12-08 11:25:58,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:25:58,181 INFO L225 Difference]: With dead ends: 41 [2018-12-08 11:25:58,181 INFO L226 Difference]: Without dead ends: 41 [2018-12-08 11:25:58,181 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-08 11:25:58,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-12-08 11:25:58,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2018-12-08 11:25:58,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-08 11:25:58,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-12-08 11:25:58,184 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 32 [2018-12-08 11:25:58,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:25:58,184 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-12-08 11:25:58,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-08 11:25:58,185 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-12-08 11:25:58,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-12-08 11:25:58,185 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:25:58,185 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:25:58,185 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-12-08 11:25:58,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:25:58,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1255881291, now seen corresponding path program 9 times [2018-12-08 11:25:58,185 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:25:58,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:25:58,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:58,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 11:25:58,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:25:58,266 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:25:58,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 11:25:58,266 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e4e9db87-1398-46b8-be8a-b43879f1d406/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 11:25:58,272 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 11:25:58,308 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-12-08 11:25:58,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 11:25:58,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 11:25:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:25:58,345 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 11:25:58,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-12-08 11:25:58,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-08 11:25:58,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-08 11:25:58,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-08 11:25:58,346 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 13 states. [2018-12-08 11:25:58,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:25:58,366 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-12-08 11:25:58,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-08 11:25:58,367 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2018-12-08 11:25:58,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:25:58,367 INFO L225 Difference]: With dead ends: 42 [2018-12-08 11:25:58,367 INFO L226 Difference]: Without dead ends: 42 [2018-12-08 11:25:58,367 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-08 11:25:58,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-08 11:25:58,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-12-08 11:25:58,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-08 11:25:58,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-12-08 11:25:58,369 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 35 [2018-12-08 11:25:58,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:25:58,369 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-12-08 11:25:58,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-08 11:25:58,369 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-12-08 11:25:58,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-08 11:25:58,370 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:25:58,370 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:25:58,370 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-12-08 11:25:58,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:25:58,370 INFO L82 PathProgramCache]: Analyzing trace with hash -497828140, now seen corresponding path program 10 times [2018-12-08 11:25:58,370 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:25:58,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:25:58,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:58,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 11:25:58,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:25:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 11:25:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 11:25:58,409 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-08 11:25:58,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 11:25:58 BoogieIcfgContainer [2018-12-08 11:25:58,426 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 11:25:58,427 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 11:25:58,427 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 11:25:58,427 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 11:25:58,427 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 11:25:56" (3/4) ... [2018-12-08 11:25:58,429 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-08 11:25:58,459 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_e4e9db87-1398-46b8-be8a-b43879f1d406/bin-2019/uautomizer/witness.graphml [2018-12-08 11:25:58,459 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 11:25:58,460 INFO L168 Benchmark]: Toolchain (without parser) took 1854.45 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 104.9 MB). Free memory was 952.2 MB in the beginning and 1.0 GB in the end (delta: -92.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 11.5 GB. [2018-12-08 11:25:58,461 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 11:25:58,461 INFO L168 Benchmark]: CACSL2BoogieTranslator took 123.38 ms. Allocated memory is still 1.0 GB. Free memory was 952.2 MB in the beginning and 941.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-08 11:25:58,461 INFO L168 Benchmark]: Boogie Preprocessor took 18.33 ms. Allocated memory is still 1.0 GB. Free memory is still 941.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 11:25:58,461 INFO L168 Benchmark]: RCFGBuilder took 147.77 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 104.9 MB). Free memory was 941.5 MB in the beginning and 1.1 GB in the end (delta: -144.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. [2018-12-08 11:25:58,461 INFO L168 Benchmark]: TraceAbstraction took 1529.87 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 38.2 MB). Peak memory consumption was 38.2 MB. Max. memory is 11.5 GB. [2018-12-08 11:25:58,461 INFO L168 Benchmark]: Witness Printer took 32.53 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 11.5 GB. [2018-12-08 11:25:58,463 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 123.38 ms. Allocated memory is still 1.0 GB. Free memory was 952.2 MB in the beginning and 941.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.33 ms. Allocated memory is still 1.0 GB. Free memory is still 941.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 147.77 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 104.9 MB). Free memory was 941.5 MB in the beginning and 1.1 GB in the end (delta: -144.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1529.87 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 38.2 MB). Peak memory consumption was 38.2 MB. Max. memory is 11.5 GB. * Witness Printer took 32.53 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L2] int* p; [L3] int i = 0; VAL [i=0] [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={45:0}, i=0, p={45:0}] [L6] p[0] = 1 VAL [a={45:0}, i=0, p={45:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={43:0}, i=1, p={43:0}] [L6] p[0] = 1 VAL [a={43:0}, i=1, p={43:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={47:0}, i=2, p={47:0}] [L6] p[0] = 1 VAL [a={47:0}, i=2, p={47:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={41:0}, i=3, p={41:0}] [L6] p[0] = 1 VAL [a={41:0}, i=3, p={41:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={51:0}, i=4, p={51:0}] [L6] p[0] = 1 VAL [a={51:0}, i=4, p={51:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={48:0}, i=5, p={48:0}] [L6] p[0] = 1 VAL [a={48:0}, i=5, p={48:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={46:0}, i=6, p={46:0}] [L6] p[0] = 1 VAL [a={46:0}, i=6, p={46:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={44:0}, i=7, p={44:0}] [L6] p[0] = 1 VAL [a={44:0}, i=7, p={44:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={49:0}, i=8, p={49:0}] [L6] p[0] = 1 VAL [a={49:0}, i=8, p={49:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={51:0}, i=9, p={51:0}] [L6] p[0] = 1 VAL [a={51:0}, i=9, p={51:0}] [L3] i++ [L3] COND FALSE !(i < 10) VAL [i=10, p={51:0}] [L8] p[0] = 2 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 20 locations, 5 error locations. UNSAFE Result, 1.4s OverallTime, 14 OverallIterations, 10 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 165 SDtfs, 123 SDslu, 422 SDs, 0 SdLazy, 189 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 279 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 20 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 484 NumberOfCodeBlocks, 480 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 424 ConstructedInterpolants, 0 QuantifiedInterpolants, 24918 SizeOfPredicates, 9 NumberOfNonLiveVariables, 1131 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 0/810 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...