./Ultimate.py --spec ../../sv-benchmarks/c/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 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_c5e8632a-20bd-40a2-9527-6308c99ead2b/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_c5e8632a-20bd-40a2-9527-6308c99ead2b/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_c5e8632a-20bd-40a2-9527-6308c99ead2b/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_c5e8632a-20bd-40a2-9527-6308c99ead2b/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_c5e8632a-20bd-40a2-9527-6308c99ead2b/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_c5e8632a-20bd-40a2-9527-6308c99ead2b/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 0.1.23-1dbac8b [2018-11-10 04:57:18,190 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 04:57:18,191 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 04:57:18,199 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 04:57:18,200 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 04:57:18,200 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 04:57:18,201 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 04:57:18,202 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 04:57:18,204 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 04:57:18,204 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 04:57:18,205 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 04:57:18,205 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 04:57:18,206 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 04:57:18,206 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 04:57:18,207 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 04:57:18,207 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 04:57:18,208 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 04:57:18,209 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 04:57:18,211 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 04:57:18,212 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 04:57:18,212 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 04:57:18,213 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 04:57:18,215 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 04:57:18,215 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 04:57:18,215 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 04:57:18,216 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 04:57:18,216 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 04:57:18,217 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 04:57:18,218 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 04:57:18,218 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 04:57:18,218 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 04:57:18,219 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 04:57:18,219 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 04:57:18,219 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 04:57:18,220 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 04:57:18,220 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 04:57:18,221 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_c5e8632a-20bd-40a2-9527-6308c99ead2b/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2018-11-10 04:57:18,230 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 04:57:18,230 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 04:57:18,231 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 04:57:18,232 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 04:57:18,232 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 04:57:18,232 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 04:57:18,232 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 04:57:18,232 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-10 04:57:18,232 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 04:57:18,232 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 04:57:18,233 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 04:57:18,233 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-11-10 04:57:18,233 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-11-10 04:57:18,233 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-11-10 04:57:18,233 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 04:57:18,233 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 04:57:18,233 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 04:57:18,234 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 04:57:18,234 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 04:57:18,234 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 04:57:18,234 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 04:57:18,234 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 04:57:18,234 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 04:57:18,234 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 04:57:18,234 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 04:57:18,235 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_c5e8632a-20bd-40a2-9527-6308c99ead2b/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7efcb16e512d7de15a71f6cd895dcd8493c4b646 [2018-11-10 04:57:18,259 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 04:57:18,269 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 04:57:18,271 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 04:57:18,273 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 04:57:18,273 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 04:57:18,274 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_c5e8632a-20bd-40a2-9527-6308c99ead2b/bin-2019/uautomizer/../../sv-benchmarks/c/memsafety-ext3/scopes3_false-valid-deref.c [2018-11-10 04:57:18,320 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c5e8632a-20bd-40a2-9527-6308c99ead2b/bin-2019/uautomizer/data/af8789a46/12e515ab40e241df95d9282956facb6a/FLAG6a8caa745 [2018-11-10 04:57:18,647 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 04:57:18,648 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_c5e8632a-20bd-40a2-9527-6308c99ead2b/sv-benchmarks/c/memsafety-ext3/scopes3_false-valid-deref.c [2018-11-10 04:57:18,651 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c5e8632a-20bd-40a2-9527-6308c99ead2b/bin-2019/uautomizer/data/af8789a46/12e515ab40e241df95d9282956facb6a/FLAG6a8caa745 [2018-11-10 04:57:18,660 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_c5e8632a-20bd-40a2-9527-6308c99ead2b/bin-2019/uautomizer/data/af8789a46/12e515ab40e241df95d9282956facb6a [2018-11-10 04:57:18,662 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 04:57:18,663 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 04:57:18,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 04:57:18,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 04:57:18,667 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 04:57:18,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 04:57:18" (1/1) ... [2018-11-10 04:57:18,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62ca410a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:57:18, skipping insertion in model container [2018-11-10 04:57:18,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 04:57:18" (1/1) ... [2018-11-10 04:57:18,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 04:57:18,689 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 04:57:18,809 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 04:57:18,815 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 04:57:18,823 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 04:57:18,834 INFO L193 MainTranslator]: Completed translation [2018-11-10 04:57:18,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:57:18 WrapperNode [2018-11-10 04:57:18,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 04:57:18,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 04:57:18,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 04:57:18,835 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 04:57:18,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:57:18" (1/1) ... [2018-11-10 04:57:18,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:57:18" (1/1) ... [2018-11-10 04:57:18,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:57:18" (1/1) ... [2018-11-10 04:57:18,847 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:57:18" (1/1) ... [2018-11-10 04:57:18,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:57:18" (1/1) ... [2018-11-10 04:57:18,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:57:18" (1/1) ... [2018-11-10 04:57:18,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:57:18" (1/1) ... [2018-11-10 04:57:18,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 04:57:18,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 04:57:18,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 04:57:18,854 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 04:57:18,855 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:57:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e8632a-20bd-40a2-9527-6308c99ead2b/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 04:57:18,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 04:57:18,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 04:57:18,926 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 04:57:18,926 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 04:57:18,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-10 04:57:18,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-10 04:57:18,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-10 04:57:18,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 04:57:18,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 04:57:18,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-11-10 04:57:18,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-10 04:57:19,035 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 04:57:19,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:57:19 BoogieIcfgContainer [2018-11-10 04:57:19,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 04:57:19,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 04:57:19,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 04:57:19,038 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 04:57:19,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 04:57:18" (1/3) ... [2018-11-10 04:57:19,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76f6ccc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 04:57:19, skipping insertion in model container [2018-11-10 04:57:19,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:57:18" (2/3) ... [2018-11-10 04:57:19,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76f6ccc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 04:57:19, skipping insertion in model container [2018-11-10 04:57:19,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:57:19" (3/3) ... [2018-11-10 04:57:19,041 INFO L112 eAbstractionObserver]: Analyzing ICFG scopes3_false-valid-deref.c [2018-11-10 04:57:19,047 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 04:57:19,051 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-11-10 04:57:19,060 INFO L257 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2018-11-10 04:57:19,074 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 04:57:19,074 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 04:57:19,074 INFO L383 AbstractCegarLoop]: Hoare is false [2018-11-10 04:57:19,074 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 04:57:19,074 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 04:57:19,075 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 04:57:19,075 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 04:57:19,075 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 04:57:19,075 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 04:57:19,083 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2018-11-10 04:57:19,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-11-10 04:57:19,089 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:57:19,090 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:57:19,091 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-10 04:57:19,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:57:19,094 INFO L82 PathProgramCache]: Analyzing trace with hash -68211098, now seen corresponding path program 1 times [2018-11-10 04:57:19,095 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 04:57:19,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 04:57:19,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:19,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:57:19,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:19,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:57:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:57:19,172 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:57:19,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 04:57:19,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 04:57:19,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 04:57:19,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 04:57:19,183 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2018-11-10 04:57:19,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:57:19,193 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-11-10 04:57:19,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 04:57:19,194 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2018-11-10 04:57:19,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:57:19,199 INFO L225 Difference]: With dead ends: 25 [2018-11-10 04:57:19,199 INFO L226 Difference]: Without dead ends: 22 [2018-11-10 04:57:19,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 04:57:19,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-10 04:57:19,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-10 04:57:19,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-10 04:57:19,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-11-10 04:57:19,222 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 8 [2018-11-10 04:57:19,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:57:19,222 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-11-10 04:57:19,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 04:57:19,222 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-11-10 04:57:19,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-10 04:57:19,222 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:57:19,223 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:57:19,223 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-10 04:57:19,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:57:19,223 INFO L82 PathProgramCache]: Analyzing trace with hash -2114559882, now seen corresponding path program 1 times [2018-11-10 04:57:19,223 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 04:57:19,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 04:57:19,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:19,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:57:19,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:57:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:57:19,252 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:57:19,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 04:57:19,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-10 04:57:19,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-10 04:57:19,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 04:57:19,254 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 3 states. [2018-11-10 04:57:19,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:57:19,278 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-11-10 04:57:19,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-10 04:57:19,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-11-10 04:57:19,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:57:19,279 INFO L225 Difference]: With dead ends: 30 [2018-11-10 04:57:19,279 INFO L226 Difference]: Without dead ends: 30 [2018-11-10 04:57:19,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 04:57:19,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-10 04:57:19,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2018-11-10 04:57:19,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-10 04:57:19,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-11-10 04:57:19,284 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 9 [2018-11-10 04:57:19,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:57:19,285 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-11-10 04:57:19,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-10 04:57:19,285 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-11-10 04:57:19,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-10 04:57:19,285 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:57:19,286 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:57:19,286 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-10 04:57:19,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:57:19,286 INFO L82 PathProgramCache]: Analyzing trace with hash -572467991, now seen corresponding path program 1 times [2018-11-10 04:57:19,286 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 04:57:19,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 04:57:19,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:19,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:57:19,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:57:19,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:57:19,319 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:57:19,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 04:57:19,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 04:57:19,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 04:57:19,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:57:19,320 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 4 states. [2018-11-10 04:57:19,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:57:19,362 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-11-10 04:57:19,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 04:57:19,362 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2018-11-10 04:57:19,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:57:19,363 INFO L225 Difference]: With dead ends: 23 [2018-11-10 04:57:19,363 INFO L226 Difference]: Without dead ends: 23 [2018-11-10 04:57:19,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-10 04:57:19,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-10 04:57:19,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-10 04:57:19,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-10 04:57:19,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-11-10 04:57:19,365 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 11 [2018-11-10 04:57:19,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:57:19,365 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-11-10 04:57:19,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 04:57:19,365 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-11-10 04:57:19,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-10 04:57:19,365 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:57:19,365 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:57:19,365 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-10 04:57:19,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:57:19,366 INFO L82 PathProgramCache]: Analyzing trace with hash -572467990, now seen corresponding path program 1 times [2018-11-10 04:57:19,366 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 04:57:19,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 04:57:19,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:19,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:57:19,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:19,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:57:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:57:19,406 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:57:19,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 04:57:19,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 04:57:19,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 04:57:19,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:57:19,407 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 4 states. [2018-11-10 04:57:19,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:57:19,448 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-11-10 04:57:19,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 04:57:19,449 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2018-11-10 04:57:19,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:57:19,449 INFO L225 Difference]: With dead ends: 23 [2018-11-10 04:57:19,449 INFO L226 Difference]: Without dead ends: 23 [2018-11-10 04:57:19,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-10 04:57:19,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-10 04:57:19,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-11-10 04:57:19,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-10 04:57:19,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-11-10 04:57:19,452 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 11 [2018-11-10 04:57:19,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:57:19,453 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-11-10 04:57:19,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 04:57:19,453 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-11-10 04:57:19,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-10 04:57:19,453 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:57:19,453 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:57:19,454 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-10 04:57:19,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:57:19,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1263671061, now seen corresponding path program 1 times [2018-11-10 04:57:19,454 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 04:57:19,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 04:57:19,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:19,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:57:19,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:57:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:57:19,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:57:19,483 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e8632a-20bd-40a2-9527-6308c99ead2b/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:57:19,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:57:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:57:19,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:57:19,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:57:19,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 04:57:19,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-11-10 04:57:19,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 04:57:19,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 04:57:19,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-10 04:57:19,573 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 5 states. [2018-11-10 04:57:19,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:57:19,589 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-11-10 04:57:19,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 04:57:19,591 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-11-10 04:57:19,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:57:19,591 INFO L225 Difference]: With dead ends: 33 [2018-11-10 04:57:19,592 INFO L226 Difference]: Without dead ends: 33 [2018-11-10 04:57:19,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-10 04:57:19,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-10 04:57:19,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2018-11-10 04:57:19,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-10 04:57:19,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-11-10 04:57:19,595 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 17 [2018-11-10 04:57:19,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:57:19,595 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-11-10 04:57:19,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 04:57:19,595 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-11-10 04:57:19,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-10 04:57:19,596 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:57:19,596 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:57:19,596 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-10 04:57:19,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:57:19,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1587817568, now seen corresponding path program 2 times [2018-11-10 04:57:19,596 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 04:57:19,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 04:57:19,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:19,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:57:19,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:19,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:57:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:57:19,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:57:19,627 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e8632a-20bd-40a2-9527-6308c99ead2b/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:57:19,632 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 04:57:19,645 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 04:57:19,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 04:57:19,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:57:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:57:19,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 04:57:19,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-11-10 04:57:19,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 04:57:19,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 04:57:19,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-10 04:57:19,687 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 6 states. [2018-11-10 04:57:19,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:57:19,698 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-11-10 04:57:19,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 04:57:19,698 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-11-10 04:57:19,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:57:19,699 INFO L225 Difference]: With dead ends: 41 [2018-11-10 04:57:19,699 INFO L226 Difference]: Without dead ends: 41 [2018-11-10 04:57:19,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-10 04:57:19,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-10 04:57:19,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2018-11-10 04:57:19,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-10 04:57:19,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-11-10 04:57:19,703 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 25 [2018-11-10 04:57:19,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:57:19,704 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-11-10 04:57:19,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 04:57:19,704 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-11-10 04:57:19,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-10 04:57:19,704 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:57:19,704 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:57:19,705 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-10 04:57:19,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:57:19,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1592666837, now seen corresponding path program 3 times [2018-11-10 04:57:19,705 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 04:57:19,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 04:57:19,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:19,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 04:57:19,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:57:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:57:19,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:57:19,753 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e8632a-20bd-40a2-9527-6308c99ead2b/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:57:19,766 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 04:57:19,793 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-10 04:57:19,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 04:57:19,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:57:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:57:19,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 04:57:19,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-11-10 04:57:19,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 04:57:19,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 04:57:19,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-10 04:57:19,845 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 7 states. [2018-11-10 04:57:19,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:57:19,856 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-11-10 04:57:19,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 04:57:19,856 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2018-11-10 04:57:19,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:57:19,857 INFO L225 Difference]: With dead ends: 49 [2018-11-10 04:57:19,857 INFO L226 Difference]: Without dead ends: 49 [2018-11-10 04:57:19,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-10 04:57:19,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-10 04:57:19,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2018-11-10 04:57:19,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-10 04:57:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-11-10 04:57:19,861 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 33 [2018-11-10 04:57:19,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:57:19,861 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-11-10 04:57:19,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 04:57:19,861 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-11-10 04:57:19,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-10 04:57:19,862 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:57:19,862 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:57:19,862 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-10 04:57:19,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:57:19,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1348410294, now seen corresponding path program 4 times [2018-11-10 04:57:19,862 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 04:57:19,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 04:57:19,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:19,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 04:57:19,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:57:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:57:19,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:57:19,909 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e8632a-20bd-40a2-9527-6308c99ead2b/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:57:19,918 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 04:57:19,931 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 04:57:19,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 04:57:19,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:57:19,942 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:57:19,958 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 04:57:19,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-10 04:57:19,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 04:57:19,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 04:57:19,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-10 04:57:19,958 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 8 states. [2018-11-10 04:57:19,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:57:19,976 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-11-10 04:57:19,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 04:57:19,977 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2018-11-10 04:57:19,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:57:19,977 INFO L225 Difference]: With dead ends: 57 [2018-11-10 04:57:19,977 INFO L226 Difference]: Without dead ends: 57 [2018-11-10 04:57:19,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-10 04:57:19,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-10 04:57:19,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2018-11-10 04:57:19,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-11-10 04:57:19,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-11-10 04:57:19,982 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 41 [2018-11-10 04:57:19,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:57:19,982 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-11-10 04:57:19,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 04:57:19,982 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-11-10 04:57:19,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-10 04:57:19,983 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:57:19,983 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:57:19,984 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-10 04:57:19,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:57:19,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1708218559, now seen corresponding path program 5 times [2018-11-10 04:57:19,984 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 04:57:19,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 04:57:19,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:19,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 04:57:19,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:57:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:57:20,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:57:20,105 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e8632a-20bd-40a2-9527-6308c99ead2b/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:57:20,113 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 04:57:20,148 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-10 04:57:20,148 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 04:57:20,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:57:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:57:20,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 04:57:20,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-10 04:57:20,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 04:57:20,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 04:57:20,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-10 04:57:20,192 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 9 states. [2018-11-10 04:57:20,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:57:20,221 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-11-10 04:57:20,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 04:57:20,221 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2018-11-10 04:57:20,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:57:20,222 INFO L225 Difference]: With dead ends: 65 [2018-11-10 04:57:20,222 INFO L226 Difference]: Without dead ends: 65 [2018-11-10 04:57:20,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-10 04:57:20,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-11-10 04:57:20,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2018-11-10 04:57:20,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-10 04:57:20,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-11-10 04:57:20,225 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 49 [2018-11-10 04:57:20,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:57:20,226 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-11-10 04:57:20,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 04:57:20,226 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-11-10 04:57:20,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-10 04:57:20,227 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:57:20,227 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:57:20,227 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-10 04:57:20,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:57:20,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1315665868, now seen corresponding path program 6 times [2018-11-10 04:57:20,227 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 04:57:20,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 04:57:20,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:20,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 04:57:20,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:57:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:57:20,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:57:20,335 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e8632a-20bd-40a2-9527-6308c99ead2b/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:57:20,347 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 04:57:20,382 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-10 04:57:20,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 04:57:20,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:57:20,410 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:57:20,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 04:57:20,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-10 04:57:20,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 04:57:20,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 04:57:20,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-10 04:57:20,427 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 10 states. [2018-11-10 04:57:20,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:57:20,458 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-11-10 04:57:20,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 04:57:20,458 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2018-11-10 04:57:20,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:57:20,458 INFO L225 Difference]: With dead ends: 73 [2018-11-10 04:57:20,459 INFO L226 Difference]: Without dead ends: 73 [2018-11-10 04:57:20,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-10 04:57:20,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-11-10 04:57:20,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2018-11-10 04:57:20,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-10 04:57:20,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-11-10 04:57:20,462 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 57 [2018-11-10 04:57:20,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:57:20,462 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-11-10 04:57:20,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 04:57:20,462 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-11-10 04:57:20,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-10 04:57:20,463 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:57:20,463 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:57:20,463 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-10 04:57:20,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:57:20,464 INFO L82 PathProgramCache]: Analyzing trace with hash -570461527, now seen corresponding path program 7 times [2018-11-10 04:57:20,464 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 04:57:20,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 04:57:20,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:20,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 04:57:20,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:20,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:57:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:57:20,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:57:20,646 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e8632a-20bd-40a2-9527-6308c99ead2b/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:57:20,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:57:20,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:57:20,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:57:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:57:20,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 04:57:20,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-10 04:57:20,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 04:57:20,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 04:57:20,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-10 04:57:20,737 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 11 states. [2018-11-10 04:57:20,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:57:20,764 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-11-10 04:57:20,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 04:57:20,764 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2018-11-10 04:57:20,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:57:20,765 INFO L225 Difference]: With dead ends: 81 [2018-11-10 04:57:20,765 INFO L226 Difference]: Without dead ends: 81 [2018-11-10 04:57:20,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-10 04:57:20,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-11-10 04:57:20,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2018-11-10 04:57:20,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-11-10 04:57:20,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-11-10 04:57:20,769 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 65 [2018-11-10 04:57:20,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:57:20,770 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-11-10 04:57:20,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 04:57:20,770 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-11-10 04:57:20,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-10 04:57:20,771 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:57:20,771 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:57:20,772 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-10 04:57:20,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:57:20,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1361516574, now seen corresponding path program 8 times [2018-11-10 04:57:20,772 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 04:57:20,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 04:57:20,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:20,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:57:20,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:20,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:57:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:57:20,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:57:20,883 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e8632a-20bd-40a2-9527-6308c99ead2b/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:57:20,890 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 04:57:20,917 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 04:57:20,917 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 04:57:20,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:57:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:57:20,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 04:57:20,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-10 04:57:20,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 04:57:20,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 04:57:20,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-10 04:57:20,955 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 12 states. [2018-11-10 04:57:20,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:57:20,998 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-11-10 04:57:20,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 04:57:20,999 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2018-11-10 04:57:20,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:57:20,999 INFO L225 Difference]: With dead ends: 89 [2018-11-10 04:57:21,000 INFO L226 Difference]: Without dead ends: 89 [2018-11-10 04:57:21,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-10 04:57:21,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-11-10 04:57:21,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2018-11-10 04:57:21,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-11-10 04:57:21,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-11-10 04:57:21,004 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 73 [2018-11-10 04:57:21,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:57:21,005 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-11-10 04:57:21,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 04:57:21,009 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-11-10 04:57:21,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-11-10 04:57:21,009 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:57:21,010 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:57:21,010 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-10 04:57:21,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:57:21,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1944029037, now seen corresponding path program 9 times [2018-11-10 04:57:21,010 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 04:57:21,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 04:57:21,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:21,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 04:57:21,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:21,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:57:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:57:21,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:57:21,106 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e8632a-20bd-40a2-9527-6308c99ead2b/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:57:21,114 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 04:57:21,174 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-10 04:57:21,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 04:57:21,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:57:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:57:21,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 04:57:21,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-10 04:57:21,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 04:57:21,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 04:57:21,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-10 04:57:21,234 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 13 states. [2018-11-10 04:57:21,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:57:21,272 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-11-10 04:57:21,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 04:57:21,273 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 81 [2018-11-10 04:57:21,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:57:21,273 INFO L225 Difference]: With dead ends: 93 [2018-11-10 04:57:21,273 INFO L226 Difference]: Without dead ends: 93 [2018-11-10 04:57:21,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-10 04:57:21,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-11-10 04:57:21,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-11-10 04:57:21,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-10 04:57:21,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-11-10 04:57:21,279 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 81 [2018-11-10 04:57:21,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:57:21,279 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-11-10 04:57:21,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 04:57:21,279 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-11-10 04:57:21,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-11-10 04:57:21,280 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:57:21,280 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:57:21,281 INFO L424 AbstractCegarLoop]: === Iteration 14 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-10 04:57:21,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:57:21,281 INFO L82 PathProgramCache]: Analyzing trace with hash 721458184, now seen corresponding path program 10 times [2018-11-10 04:57:21,281 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 04:57:21,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 04:57:21,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:21,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 04:57:21,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:57:21,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 04:57:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 04:57:21,338 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 04:57:21,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 04:57:21 BoogieIcfgContainer [2018-11-10 04:57:21,366 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 04:57:21,366 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 04:57:21,366 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 04:57:21,366 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 04:57:21,366 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:57:19" (3/4) ... [2018-11-10 04:57:21,368 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-10 04:57:21,415 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_c5e8632a-20bd-40a2-9527-6308c99ead2b/bin-2019/uautomizer/witness.graphml [2018-11-10 04:57:21,415 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 04:57:21,416 INFO L168 Benchmark]: Toolchain (without parser) took 2753.68 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 218.1 MB). Free memory was 960.2 MB in the beginning and 1.1 GB in the end (delta: -172.5 MB). Peak memory consumption was 45.6 MB. Max. memory is 11.5 GB. [2018-11-10 04:57:21,417 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 04:57:21,417 INFO L168 Benchmark]: CACSL2BoogieTranslator took 171.18 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 949.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2018-11-10 04:57:21,417 INFO L168 Benchmark]: Boogie Preprocessor took 19.23 ms. Allocated memory is still 1.0 GB. Free memory is still 949.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 04:57:21,417 INFO L168 Benchmark]: RCFGBuilder took 181.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.3 MB). Free memory was 949.3 MB in the beginning and 1.1 GB in the end (delta: -195.7 MB). Peak memory consumption was 22.1 MB. Max. memory is 11.5 GB. [2018-11-10 04:57:21,418 INFO L168 Benchmark]: TraceAbstraction took 2329.82 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 59.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.3 MB). Peak memory consumption was 72.1 MB. Max. memory is 11.5 GB. [2018-11-10 04:57:21,418 INFO L168 Benchmark]: Witness Printer took 49.21 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. [2018-11-10 04:57:21,420 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 171.18 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 949.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.23 ms. Allocated memory is still 1.0 GB. Free memory is still 949.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 181.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.3 MB). Free memory was 949.3 MB in the beginning and 1.1 GB in the end (delta: -195.7 MB). Peak memory consumption was 22.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2329.82 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 59.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.3 MB). Peak memory consumption was 72.1 MB. Max. memory is 11.5 GB. * Witness Printer took 49.21 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24 B). Peak memory consumption was 24 B. 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 VAL [i=0] [L4] FCALL int a[10]; VAL [a={42:0}, i=0] [L5] p = a VAL [a={42:0}, i=0, p={42:0}] [L6] FCALL p[0] = 1 VAL [a={42:0}, i=0, p={42:0}] [L3] i++ VAL [a={42:0}, i=1, p={42:0}] [L3] COND TRUE i < 10 VAL [i=1, p={42:0}] [L4] FCALL int a[10]; VAL [a={51:0}, i=1, p={42:0}] [L5] p = a VAL [a={51:0}, i=1, p={51:0}] [L6] FCALL p[0] = 1 VAL [a={51:0}, i=1, p={51:0}] [L3] i++ VAL [a={51:0}, i=2, p={51:0}] [L3] COND TRUE i < 10 VAL [i=2, p={51:0}] [L4] FCALL int a[10]; VAL [a={44:0}, i=2, p={51:0}] [L5] p = a VAL [a={44:0}, i=2, p={44:0}] [L6] FCALL p[0] = 1 VAL [a={44:0}, i=2, p={44:0}] [L3] i++ VAL [a={44:0}, i=3, p={44:0}] [L3] COND TRUE i < 10 VAL [i=3, p={44:0}] [L4] FCALL int a[10]; VAL [a={45:0}, i=3, p={44:0}] [L5] p = a VAL [a={45:0}, i=3, p={45:0}] [L6] FCALL p[0] = 1 VAL [a={45:0}, i=3, p={45:0}] [L3] i++ VAL [a={45:0}, i=4, p={45:0}] [L3] COND TRUE i < 10 VAL [i=4, p={45:0}] [L4] FCALL int a[10]; VAL [a={48:0}, i=4, p={45:0}] [L5] p = a VAL [a={48:0}, i=4, p={48:0}] [L6] FCALL p[0] = 1 VAL [a={48:0}, i=4, p={48:0}] [L3] i++ VAL [a={48:0}, i=5, p={48:0}] [L3] COND TRUE i < 10 VAL [i=5, p={48:0}] [L4] FCALL int a[10]; VAL [a={51:0}, i=5, p={48:0}] [L5] p = a VAL [a={51:0}, i=5, p={51:0}] [L6] FCALL p[0] = 1 VAL [a={51:0}, i=5, p={51:0}] [L3] i++ VAL [a={51:0}, i=6, p={51:0}] [L3] COND TRUE i < 10 VAL [i=6, p={51:0}] [L4] FCALL int a[10]; VAL [a={43:0}, i=6, p={51:0}] [L5] p = a VAL [a={43:0}, i=6, p={43:0}] [L6] FCALL p[0] = 1 VAL [a={43:0}, i=6, p={43:0}] [L3] i++ VAL [a={43:0}, i=7, p={43:0}] [L3] COND TRUE i < 10 VAL [i=7, p={43:0}] [L4] FCALL int a[10]; VAL [a={46:0}, i=7, p={43:0}] [L5] p = a VAL [a={46:0}, i=7, p={46:0}] [L6] FCALL p[0] = 1 VAL [a={46:0}, i=7, p={46:0}] [L3] i++ VAL [a={46:0}, i=8, p={46:0}] [L3] COND TRUE i < 10 VAL [i=8, p={46:0}] [L4] FCALL int a[10]; VAL [a={47:0}, i=8, p={46:0}] [L5] p = a VAL [a={47:0}, i=8, p={47:0}] [L6] FCALL p[0] = 1 VAL [a={47:0}, i=8, p={47:0}] [L3] i++ VAL [a={47:0}, i=9, p={47:0}] [L3] COND TRUE i < 10 VAL [i=9, p={47:0}] [L4] FCALL int a[10]; VAL [a={50:0}, i=9, p={47:0}] [L5] p = a VAL [a={50:0}, i=9, p={50:0}] [L6] FCALL p[0] = 1 VAL [a={50:0}, i=9, p={50:0}] [L3] i++ VAL [a={50:0}, i=10, p={50:0}] [L3] COND FALSE !(i < 10) VAL [i=10, p={50:0}] [L8] FCALL p[0] = 2 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 25 locations, 5 error locations. UNSAFE Result, 2.2s OverallTime, 14 OverallIterations, 11 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 230 SDtfs, 246 SDslu, 866 SDs, 0 SdLazy, 220 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 517 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred 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, 40 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 1010 NumberOfCodeBlocks, 1006 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 899 ConstructedInterpolants, 0 QuantifiedInterpolants, 137673 SizeOfPredicates, 9 NumberOfNonLiveVariables, 1250 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 0/2100 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...