./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 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_d72dcc42-e247-407f-afc0-25489064f09e/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d72dcc42-e247-407f-afc0-25489064f09e/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d72dcc42-e247-407f-afc0-25489064f09e/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d72dcc42-e247-407f-afc0-25489064f09e/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_d72dcc42-e247-407f-afc0-25489064f09e/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d72dcc42-e247-407f-afc0-25489064f09e/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 0.1.23-5842f4b [2018-11-18 10:50:16,625 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 10:50:16,626 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 10:50:16,634 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 10:50:16,635 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 10:50:16,635 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 10:50:16,636 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 10:50:16,637 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 10:50:16,638 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 10:50:16,639 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 10:50:16,639 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 10:50:16,640 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 10:50:16,640 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 10:50:16,641 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 10:50:16,642 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 10:50:16,642 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 10:50:16,643 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 10:50:16,645 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 10:50:16,646 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 10:50:16,647 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 10:50:16,648 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 10:50:16,649 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 10:50:16,650 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 10:50:16,650 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 10:50:16,651 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 10:50:16,651 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 10:50:16,652 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 10:50:16,653 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 10:50:16,653 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 10:50:16,654 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 10:50:16,654 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 10:50:16,655 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 10:50:16,655 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 10:50:16,655 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 10:50:16,656 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 10:50:16,657 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 10:50:16,657 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d72dcc42-e247-407f-afc0-25489064f09e/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2018-11-18 10:50:16,666 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 10:50:16,667 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 10:50:16,668 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 10:50:16,668 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 10:50:16,668 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 10:50:16,668 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 10:50:16,668 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 10:50:16,668 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 10:50:16,668 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 10:50:16,669 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 10:50:16,669 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 10:50:16,669 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-11-18 10:50:16,669 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-11-18 10:50:16,669 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-11-18 10:50:16,669 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 10:50:16,669 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 10:50:16,669 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 10:50:16,670 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 10:50:16,670 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 10:50:16,670 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 10:50:16,670 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 10:50:16,670 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 10:50:16,670 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 10:50:16,670 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 10:50:16,670 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 10:50:16,671 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 10:50:16,671 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_d72dcc42-e247-407f-afc0-25489064f09e/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 [2018-11-18 10:50:16,694 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 10:50:16,701 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 10:50:16,703 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 10:50:16,704 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 10:50:16,704 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 10:50:16,705 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d72dcc42-e247-407f-afc0-25489064f09e/bin-2019/uautomizer/../../sv-benchmarks/c/memsafety-ext3/scopes3_false-valid-deref.c [2018-11-18 10:50:16,740 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d72dcc42-e247-407f-afc0-25489064f09e/bin-2019/uautomizer/data/e6a27b91d/fed1a98809554c3baf16fdaa9a2f3b09/FLAGafd5173d1 [2018-11-18 10:50:17,153 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 10:50:17,153 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d72dcc42-e247-407f-afc0-25489064f09e/sv-benchmarks/c/memsafety-ext3/scopes3_false-valid-deref.c [2018-11-18 10:50:17,156 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d72dcc42-e247-407f-afc0-25489064f09e/bin-2019/uautomizer/data/e6a27b91d/fed1a98809554c3baf16fdaa9a2f3b09/FLAGafd5173d1 [2018-11-18 10:50:17,165 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d72dcc42-e247-407f-afc0-25489064f09e/bin-2019/uautomizer/data/e6a27b91d/fed1a98809554c3baf16fdaa9a2f3b09 [2018-11-18 10:50:17,167 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 10:50:17,168 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 10:50:17,168 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 10:50:17,168 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 10:50:17,171 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 10:50:17,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:50:17" (1/1) ... [2018-11-18 10:50:17,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52e8b854 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:17, skipping insertion in model container [2018-11-18 10:50:17,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:50:17" (1/1) ... [2018-11-18 10:50:17,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 10:50:17,193 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 10:50:17,299 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:50:17,305 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 10:50:17,313 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:50:17,321 INFO L195 MainTranslator]: Completed translation [2018-11-18 10:50:17,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:17 WrapperNode [2018-11-18 10:50:17,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 10:50:17,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 10:50:17,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 10:50:17,322 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 10:50:17,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:17" (1/1) ... [2018-11-18 10:50:17,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:17" (1/1) ... [2018-11-18 10:50:17,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:17" (1/1) ... [2018-11-18 10:50:17,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:17" (1/1) ... [2018-11-18 10:50:17,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:17" (1/1) ... [2018-11-18 10:50:17,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:17" (1/1) ... [2018-11-18 10:50:17,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:17" (1/1) ... [2018-11-18 10:50:17,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 10:50:17,341 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 10:50:17,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 10:50:17,341 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 10:50:17,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d72dcc42-e247-407f-afc0-25489064f09e/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 [2018-11-18 10:50:17,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 10:50:17,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 10:50:17,414 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 10:50:17,414 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 10:50:17,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 10:50:17,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-18 10:50:17,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-18 10:50:17,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 10:50:17,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 10:50:17,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-11-18 10:50:17,415 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-18 10:50:17,510 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 10:50:17,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:50:17 BoogieIcfgContainer [2018-11-18 10:50:17,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 10:50:17,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 10:50:17,511 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 10:50:17,513 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 10:50:17,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 10:50:17" (1/3) ... [2018-11-18 10:50:17,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7413ddab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 10:50:17, skipping insertion in model container [2018-11-18 10:50:17,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:17" (2/3) ... [2018-11-18 10:50:17,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7413ddab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 10:50:17, skipping insertion in model container [2018-11-18 10:50:17,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:50:17" (3/3) ... [2018-11-18 10:50:17,515 INFO L112 eAbstractionObserver]: Analyzing ICFG scopes3_false-valid-deref.c [2018-11-18 10:50:17,521 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 10:50:17,525 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-11-18 10:50:17,533 INFO L257 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2018-11-18 10:50:17,546 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 10:50:17,547 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 10:50:17,547 INFO L383 AbstractCegarLoop]: Hoare is false [2018-11-18 10:50:17,547 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 10:50:17,547 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 10:50:17,547 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 10:50:17,547 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 10:50:17,547 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 10:50:17,548 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 10:50:17,555 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-11-18 10:50:17,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-11-18 10:50:17,560 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:17,561 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:50:17,562 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-11-18 10:50:17,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:17,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1546668778, now seen corresponding path program 1 times [2018-11-18 10:50:17,569 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:50:17,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:50:17,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:17,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:17,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:17,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:17,646 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:50:17,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 10:50:17,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 10:50:17,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 10:50:17,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 10:50:17,660 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2018-11-18 10:50:17,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:17,673 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-11-18 10:50:17,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 10:50:17,674 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2018-11-18 10:50:17,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:17,679 INFO L225 Difference]: With dead ends: 21 [2018-11-18 10:50:17,680 INFO L226 Difference]: Without dead ends: 18 [2018-11-18 10:50:17,681 INFO L604 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 [2018-11-18 10:50:17,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-18 10:50:17,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-18 10:50:17,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-18 10:50:17,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-11-18 10:50:17,707 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 8 [2018-11-18 10:50:17,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:17,707 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-11-18 10:50:17,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 10:50:17,707 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-11-18 10:50:17,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-18 10:50:17,708 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:17,708 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:50:17,708 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-11-18 10:50:17,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:17,708 INFO L82 PathProgramCache]: Analyzing trace with hash 702079982, now seen corresponding path program 1 times [2018-11-18 10:50:17,709 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:50:17,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:50:17,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:17,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:17,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:17,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:17,738 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:50:17,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 10:50:17,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 10:50:17,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 10:50:17,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 10:50:17,740 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 3 states. [2018-11-18 10:50:17,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:17,750 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-11-18 10:50:17,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 10:50:17,751 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-11-18 10:50:17,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:17,752 INFO L225 Difference]: With dead ends: 24 [2018-11-18 10:50:17,752 INFO L226 Difference]: Without dead ends: 24 [2018-11-18 10:50:17,753 INFO L604 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 [2018-11-18 10:50:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-18 10:50:17,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2018-11-18 10:50:17,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-18 10:50:17,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-11-18 10:50:17,757 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 9 [2018-11-18 10:50:17,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:17,757 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-11-18 10:50:17,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 10:50:17,758 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-11-18 10:50:17,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-18 10:50:17,758 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:17,758 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:50:17,758 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-11-18 10:50:17,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:17,759 INFO L82 PathProgramCache]: Analyzing trace with hash 702080036, now seen corresponding path program 1 times [2018-11-18 10:50:17,759 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:50:17,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:50:17,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:17,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:17,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:17,797 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:50:17,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 10:50:17,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 10:50:17,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 10:50:17,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 10:50:17,798 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 3 states. [2018-11-18 10:50:17,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:17,822 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-11-18 10:50:17,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 10:50:17,822 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-11-18 10:50:17,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:17,823 INFO L225 Difference]: With dead ends: 19 [2018-11-18 10:50:17,823 INFO L226 Difference]: Without dead ends: 19 [2018-11-18 10:50:17,823 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 10:50:17,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-11-18 10:50:17,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-11-18 10:50:17,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-18 10:50:17,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-11-18 10:50:17,826 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 9 [2018-11-18 10:50:17,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:17,826 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-11-18 10:50:17,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 10:50:17,826 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-11-18 10:50:17,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-18 10:50:17,827 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:17,827 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:50:17,827 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-11-18 10:50:17,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:17,827 INFO L82 PathProgramCache]: Analyzing trace with hash 702080037, now seen corresponding path program 1 times [2018-11-18 10:50:17,827 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:50:17,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:50:17,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:17,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:17,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:17,856 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:50:17,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 10:50:17,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 10:50:17,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 10:50:17,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 10:50:17,857 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 3 states. [2018-11-18 10:50:17,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:17,873 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-11-18 10:50:17,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 10:50:17,874 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-11-18 10:50:17,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:17,874 INFO L225 Difference]: With dead ends: 17 [2018-11-18 10:50:17,874 INFO L226 Difference]: Without dead ends: 17 [2018-11-18 10:50:17,874 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 10:50:17,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-11-18 10:50:17,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-11-18 10:50:17,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-18 10:50:17,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-11-18 10:50:17,876 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 9 [2018-11-18 10:50:17,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:17,876 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-11-18 10:50:17,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 10:50:17,876 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-11-18 10:50:17,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 10:50:17,877 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:17,877 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:50:17,877 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-11-18 10:50:17,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:17,877 INFO L82 PathProgramCache]: Analyzing trace with hash 213704965, now seen corresponding path program 1 times [2018-11-18 10:50:17,877 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:50:17,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:50:17,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:17,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:17,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:17,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:50:17,912 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d72dcc42-e247-407f-afc0-25489064f09e/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 [2018-11-18 10:50:17,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:17,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:17,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:50:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:17,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:50:17,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-11-18 10:50:17,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 10:50:17,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 10:50:17,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:50:17,979 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2018-11-18 10:50:17,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:17,993 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-11-18 10:50:17,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 10:50:17,993 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-18 10:50:17,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:17,994 INFO L225 Difference]: With dead ends: 23 [2018-11-18 10:50:17,994 INFO L226 Difference]: Without dead ends: 23 [2018-11-18 10:50:17,994 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:50:17,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-18 10:50:17,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-11-18 10:50:17,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-18 10:50:17,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-11-18 10:50:17,996 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 13 [2018-11-18 10:50:17,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:17,996 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-11-18 10:50:17,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 10:50:17,996 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-11-18 10:50:17,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-18 10:50:17,997 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:17,997 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:50:17,997 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-11-18 10:50:17,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:17,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1264682340, now seen corresponding path program 2 times [2018-11-18 10:50:17,997 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:50:17,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:50:17,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:17,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:17,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:18,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:50:18,044 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d72dcc42-e247-407f-afc0-25489064f09e/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 [2018-11-18 10:50:18,050 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 10:50:18,067 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 10:50:18,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:50:18,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:50:18,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:18,103 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:50:18,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-11-18 10:50:18,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 10:50:18,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 10:50:18,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 10:50:18,105 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 6 states. [2018-11-18 10:50:18,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:18,130 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-11-18 10:50:18,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 10:50:18,131 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-11-18 10:50:18,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:18,131 INFO L225 Difference]: With dead ends: 27 [2018-11-18 10:50:18,131 INFO L226 Difference]: Without dead ends: 27 [2018-11-18 10:50:18,132 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 10:50:18,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-18 10:50:18,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2018-11-18 10:50:18,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-18 10:50:18,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-11-18 10:50:18,133 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 17 [2018-11-18 10:50:18,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:18,134 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-11-18 10:50:18,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 10:50:18,134 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-11-18 10:50:18,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-18 10:50:18,134 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:18,134 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:50:18,134 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-11-18 10:50:18,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:18,135 INFO L82 PathProgramCache]: Analyzing trace with hash -128225101, now seen corresponding path program 3 times [2018-11-18 10:50:18,135 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:50:18,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:50:18,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:18,135 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:50:18,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:18,185 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:18,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:50:18,185 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d72dcc42-e247-407f-afc0-25489064f09e/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 [2018-11-18 10:50:18,196 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 10:50:18,211 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-18 10:50:18,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:50:18,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:50:18,224 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:18,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:50:18,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-11-18 10:50:18,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 10:50:18,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 10:50:18,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-18 10:50:18,239 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 7 states. [2018-11-18 10:50:18,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:18,266 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-11-18 10:50:18,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 10:50:18,266 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2018-11-18 10:50:18,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:18,268 INFO L225 Difference]: With dead ends: 31 [2018-11-18 10:50:18,268 INFO L226 Difference]: Without dead ends: 31 [2018-11-18 10:50:18,268 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-18 10:50:18,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-18 10:50:18,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2018-11-18 10:50:18,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-18 10:50:18,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-11-18 10:50:18,272 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 21 [2018-11-18 10:50:18,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:18,272 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-11-18 10:50:18,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 10:50:18,272 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-11-18 10:50:18,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-18 10:50:18,272 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:18,273 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:50:18,273 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-11-18 10:50:18,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:18,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1980660918, now seen corresponding path program 4 times [2018-11-18 10:50:18,273 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:50:18,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:50:18,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:18,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:50:18,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:18,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:50:18,328 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d72dcc42-e247-407f-afc0-25489064f09e/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 [2018-11-18 10:50:18,335 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 10:50:18,349 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 10:50:18,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:50:18,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:50:18,359 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:18,373 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:50:18,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-18 10:50:18,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 10:50:18,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 10:50:18,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-18 10:50:18,375 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 8 states. [2018-11-18 10:50:18,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:18,394 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-11-18 10:50:18,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 10:50:18,394 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2018-11-18 10:50:18,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:18,395 INFO L225 Difference]: With dead ends: 35 [2018-11-18 10:50:18,395 INFO L226 Difference]: Without dead ends: 35 [2018-11-18 10:50:18,396 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-18 10:50:18,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-11-18 10:50:18,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2018-11-18 10:50:18,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-18 10:50:18,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-11-18 10:50:18,399 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 25 [2018-11-18 10:50:18,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:18,399 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-11-18 10:50:18,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 10:50:18,399 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-11-18 10:50:18,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-18 10:50:18,400 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:18,400 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:50:18,400 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-11-18 10:50:18,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:18,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1719562849, now seen corresponding path program 5 times [2018-11-18 10:50:18,400 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:50:18,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:50:18,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:18,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:50:18,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:18,456 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:18,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:50:18,456 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d72dcc42-e247-407f-afc0-25489064f09e/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 [2018-11-18 10:50:18,462 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 10:50:18,493 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-18 10:50:18,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:50:18,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:50:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:18,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:50:18,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-18 10:50:18,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 10:50:18,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 10:50:18,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-18 10:50:18,524 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 9 states. [2018-11-18 10:50:18,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:18,548 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-11-18 10:50:18,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 10:50:18,549 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2018-11-18 10:50:18,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:18,550 INFO L225 Difference]: With dead ends: 39 [2018-11-18 10:50:18,550 INFO L226 Difference]: Without dead ends: 39 [2018-11-18 10:50:18,550 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-18 10:50:18,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-18 10:50:18,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-11-18 10:50:18,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-18 10:50:18,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-11-18 10:50:18,555 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 29 [2018-11-18 10:50:18,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:18,555 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-11-18 10:50:18,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 10:50:18,555 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-11-18 10:50:18,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-18 10:50:18,557 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:18,557 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:50:18,558 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-11-18 10:50:18,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:18,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1178598904, now seen corresponding path program 6 times [2018-11-18 10:50:18,558 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:50:18,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:50:18,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:18,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:50:18,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:18,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:50:18,671 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d72dcc42-e247-407f-afc0-25489064f09e/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 [2018-11-18 10:50:18,680 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 10:50:18,717 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-18 10:50:18,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:50:18,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:50:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:18,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:50:18,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-18 10:50:18,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 10:50:18,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 10:50:18,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-18 10:50:18,753 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 10 states. [2018-11-18 10:50:18,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:18,777 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-11-18 10:50:18,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 10:50:18,777 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2018-11-18 10:50:18,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:18,778 INFO L225 Difference]: With dead ends: 43 [2018-11-18 10:50:18,778 INFO L226 Difference]: Without dead ends: 43 [2018-11-18 10:50:18,778 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-18 10:50:18,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-11-18 10:50:18,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2018-11-18 10:50:18,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-11-18 10:50:18,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-11-18 10:50:18,781 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 33 [2018-11-18 10:50:18,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:18,781 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-11-18 10:50:18,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 10:50:18,781 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-11-18 10:50:18,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-18 10:50:18,782 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:18,782 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:50:18,782 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-11-18 10:50:18,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:18,783 INFO L82 PathProgramCache]: Analyzing trace with hash 211019279, now seen corresponding path program 7 times [2018-11-18 10:50:18,783 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:50:18,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:50:18,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:18,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:50:18,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:18,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:50:18,861 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d72dcc42-e247-407f-afc0-25489064f09e/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 [2018-11-18 10:50:18,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:18,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:50:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:18,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:50:18,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-18 10:50:18,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 10:50:18,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 10:50:18,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-18 10:50:18,938 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 11 states. [2018-11-18 10:50:18,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:18,964 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-11-18 10:50:18,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 10:50:18,964 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2018-11-18 10:50:18,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:18,965 INFO L225 Difference]: With dead ends: 47 [2018-11-18 10:50:18,965 INFO L226 Difference]: Without dead ends: 47 [2018-11-18 10:50:18,965 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-18 10:50:18,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-11-18 10:50:18,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2018-11-18 10:50:18,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-18 10:50:18,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-11-18 10:50:18,968 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 37 [2018-11-18 10:50:18,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:18,968 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-11-18 10:50:18,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 10:50:18,969 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-11-18 10:50:18,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-18 10:50:18,969 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:18,969 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:50:18,970 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-11-18 10:50:18,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:18,970 INFO L82 PathProgramCache]: Analyzing trace with hash 938994342, now seen corresponding path program 8 times [2018-11-18 10:50:18,970 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:50:18,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:50:18,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:18,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:18,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:18,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:19,050 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:19,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:50:19,050 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d72dcc42-e247-407f-afc0-25489064f09e/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 [2018-11-18 10:50:19,068 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 10:50:19,107 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 10:50:19,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:50:19,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:50:19,121 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:19,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:50:19,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-18 10:50:19,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 10:50:19,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 10:50:19,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-18 10:50:19,137 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 12 states. [2018-11-18 10:50:19,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:19,167 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-11-18 10:50:19,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 10:50:19,167 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2018-11-18 10:50:19,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:19,168 INFO L225 Difference]: With dead ends: 51 [2018-11-18 10:50:19,168 INFO L226 Difference]: Without dead ends: 51 [2018-11-18 10:50:19,168 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-18 10:50:19,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-18 10:50:19,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2018-11-18 10:50:19,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-18 10:50:19,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-11-18 10:50:19,171 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 41 [2018-11-18 10:50:19,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:19,171 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-11-18 10:50:19,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 10:50:19,171 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-11-18 10:50:19,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-18 10:50:19,172 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:19,172 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:50:19,173 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-11-18 10:50:19,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:19,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1376373693, now seen corresponding path program 9 times [2018-11-18 10:50:19,173 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:50:19,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:50:19,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:19,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:50:19,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:19,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:50:19,263 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d72dcc42-e247-407f-afc0-25489064f09e/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 [2018-11-18 10:50:19,280 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 10:50:19,341 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-18 10:50:19,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:50:19,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:50:19,362 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:19,378 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:50:19,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-18 10:50:19,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 10:50:19,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 10:50:19,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-18 10:50:19,379 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 13 states. [2018-11-18 10:50:19,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:19,426 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-11-18 10:50:19,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 10:50:19,427 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2018-11-18 10:50:19,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:19,428 INFO L225 Difference]: With dead ends: 53 [2018-11-18 10:50:19,428 INFO L226 Difference]: Without dead ends: 53 [2018-11-18 10:50:19,428 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-18 10:50:19,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-11-18 10:50:19,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-11-18 10:50:19,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-11-18 10:50:19,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-11-18 10:50:19,435 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 45 [2018-11-18 10:50:19,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:19,435 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-11-18 10:50:19,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 10:50:19,435 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-11-18 10:50:19,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-18 10:50:19,436 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:19,436 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:50:19,436 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-11-18 10:50:19,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:19,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1602701652, now seen corresponding path program 10 times [2018-11-18 10:50:19,437 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:50:19,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:50:19,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:19,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:50:19,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:19,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:50:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:50:19,552 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 10:50:19,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 10:50:19 BoogieIcfgContainer [2018-11-18 10:50:19,575 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 10:50:19,575 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 10:50:19,575 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 10:50:19,576 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 10:50:19,576 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:50:17" (3/4) ... [2018-11-18 10:50:19,578 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 10:50:19,617 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_d72dcc42-e247-407f-afc0-25489064f09e/bin-2019/uautomizer/witness.graphml [2018-11-18 10:50:19,617 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 10:50:19,618 INFO L168 Benchmark]: Toolchain (without parser) took 2450.92 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 235.9 MB). Free memory was 958.5 MB in the beginning and 1.2 GB in the end (delta: -231.6 MB). Peak memory consumption was 4.3 MB. Max. memory is 11.5 GB. [2018-11-18 10:50:19,620 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 10:50:19,620 INFO L168 Benchmark]: CACSL2BoogieTranslator took 153.88 ms. Allocated memory is still 1.0 GB. Free memory was 958.5 MB in the beginning and 947.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:50:19,620 INFO L168 Benchmark]: Boogie Preprocessor took 18.64 ms. Allocated memory is still 1.0 GB. Free memory was 947.7 MB in the beginning and 942.4 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-18 10:50:19,620 INFO L168 Benchmark]: RCFGBuilder took 170.00 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 176.7 MB). Free memory was 942.4 MB in the beginning and 1.2 GB in the end (delta: -215.3 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-18 10:50:19,621 INFO L168 Benchmark]: TraceAbstraction took 2063.45 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 59.2 MB). Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: -32.4 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. [2018-11-18 10:50:19,621 INFO L168 Benchmark]: Witness Printer took 42.22 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 10:50:19,623 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 982.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 153.88 ms. Allocated memory is still 1.0 GB. Free memory was 958.5 MB in the beginning and 947.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.64 ms. Allocated memory is still 1.0 GB. Free memory was 947.7 MB in the beginning and 942.4 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 170.00 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 176.7 MB). Free memory was 942.4 MB in the beginning and 1.2 GB in the end (delta: -215.3 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2063.45 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 59.2 MB). Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: -32.4 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. * Witness Printer took 42.22 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L2] int* p; [L3] int i = 0; VAL [i=0] [L3] COND TRUE i < 10 [L4] FCALL int a[10]; [L5] p = a VAL [a={46:0}, i=0, p={46:0}] [L6] FCALL p[0] = 1 VAL [a={46:0}, i=0, p={46:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] FCALL int a[10]; [L5] p = a VAL [a={46:0}, i=1, p={46:0}] [L6] FCALL p[0] = 1 VAL [a={46:0}, i=1, p={46:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] FCALL int a[10]; [L5] p = a VAL [a={41:0}, i=2, p={41:0}] [L6] FCALL p[0] = 1 VAL [a={41:0}, i=2, p={41:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] FCALL int a[10]; [L5] p = a VAL [a={44:0}, i=3, p={44:0}] [L6] FCALL p[0] = 1 VAL [a={44:0}, i=3, p={44:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] FCALL int a[10]; [L5] p = a VAL [a={46:0}, i=4, p={46:0}] [L6] FCALL p[0] = 1 VAL [a={46:0}, i=4, p={46:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] FCALL int a[10]; [L5] p = a VAL [a={46:0}, i=5, p={46:0}] [L6] FCALL p[0] = 1 VAL [a={46:0}, i=5, p={46:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] FCALL int a[10]; [L5] p = a VAL [a={46:0}, i=6, p={46:0}] [L6] FCALL p[0] = 1 VAL [a={46:0}, i=6, p={46:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] FCALL int a[10]; [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++ [L3] COND TRUE i < 10 [L4] FCALL int a[10]; [L5] p = a VAL [a={46:0}, i=8, p={46:0}] [L6] FCALL p[0] = 1 VAL [a={46:0}, i=8, p={46:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] FCALL int a[10]; [L5] p = a VAL [a={43:0}, i=9, p={43:0}] [L6] FCALL p[0] = 1 VAL [a={43:0}, i=9, p={43:0}] [L3] i++ [L3] COND FALSE !(i < 10) VAL [i=10, p={43:0}] [L8] FCALL p[0] = 2 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 21 locations, 5 error locations. UNSAFE Result, 2.0s OverallTime, 14 OverallIterations, 11 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 180 SDtfs, 124 SDslu, 454 SDs, 0 SdLazy, 185 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 333 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 20 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 606 NumberOfCodeBlocks, 602 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 535 ConstructedInterpolants, 0 QuantifiedInterpolants, 42417 SizeOfPredicates, 9 NumberOfNonLiveVariables, 1185 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 0/1140 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...