./Ultimate.py --spec ../../sv-benchmarks/c/NoOverflows.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2c_true-no-overflow_true-termination_true-valid-memsafety.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_716bbf9a-03f4-45f3-b565-1fcfce1d999a/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_716bbf9a-03f4-45f3-b565-1fcfce1d999a/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_716bbf9a-03f4-45f3-b565-1fcfce1d999a/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_716bbf9a-03f4-45f3-b565-1fcfce1d999a/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2c_true-no-overflow_true-termination_true-valid-memsafety.c -s /tmp/vcloud-vcloud-master/worker/working_dir_716bbf9a-03f4-45f3-b565-1fcfce1d999a/bin-2019/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_716bbf9a-03f4-45f3-b565-1fcfce1d999a/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 14df269faa4a77275028af94d8141ab36c184cf5 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 16:03:15,453 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 16:03:15,455 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 16:03:15,461 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 16:03:15,461 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 16:03:15,462 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 16:03:15,463 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 16:03:15,464 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 16:03:15,465 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 16:03:15,466 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 16:03:15,467 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 16:03:15,467 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 16:03:15,467 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 16:03:15,468 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 16:03:15,469 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 16:03:15,470 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 16:03:15,470 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 16:03:15,471 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 16:03:15,473 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 16:03:15,474 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 16:03:15,475 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 16:03:15,475 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 16:03:15,477 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 16:03:15,477 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 16:03:15,477 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 16:03:15,478 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 16:03:15,479 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 16:03:15,479 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 16:03:15,480 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 16:03:15,481 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 16:03:15,481 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 16:03:15,481 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 16:03:15,482 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 16:03:15,482 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 16:03:15,482 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 16:03:15,483 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 16:03:15,483 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_716bbf9a-03f4-45f3-b565-1fcfce1d999a/bin-2019/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf [2018-11-18 16:03:15,493 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 16:03:15,494 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 16:03:15,494 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 16:03:15,495 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-18 16:03:15,495 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 16:03:15,495 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 16:03:15,495 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 16:03:15,496 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 16:03:15,496 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 16:03:15,496 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 16:03:15,496 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 16:03:15,496 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 16:03:15,496 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 16:03:15,496 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 16:03:15,497 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-11-18 16:03:15,497 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 16:03:15,497 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 16:03:15,497 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 16:03:15,497 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 16:03:15,497 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 16:03:15,497 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 16:03:15,498 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 16:03:15,498 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 16:03:15,498 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 16:03:15,498 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 16:03:15,498 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 16:03:15,498 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 16:03:15,498 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 16:03:15,499 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 16:03:15,499 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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_716bbf9a-03f4-45f3-b565-1fcfce1d999a/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 ! overflow) ) 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14df269faa4a77275028af94d8141ab36c184cf5 [2018-11-18 16:03:15,525 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 16:03:15,534 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 16:03:15,537 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 16:03:15,538 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 16:03:15,538 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 16:03:15,539 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_716bbf9a-03f4-45f3-b565-1fcfce1d999a/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2c_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-18 16:03:15,584 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_716bbf9a-03f4-45f3-b565-1fcfce1d999a/bin-2019/uautomizer/data/4db14549a/76af02d05a6647ffa786e831e288497a/FLAGee762f69b [2018-11-18 16:03:15,889 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 16:03:15,890 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_716bbf9a-03f4-45f3-b565-1fcfce1d999a/sv-benchmarks/c/termination-crafted/NestedRecursion_2c_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-18 16:03:15,895 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_716bbf9a-03f4-45f3-b565-1fcfce1d999a/bin-2019/uautomizer/data/4db14549a/76af02d05a6647ffa786e831e288497a/FLAGee762f69b [2018-11-18 16:03:15,907 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_716bbf9a-03f4-45f3-b565-1fcfce1d999a/bin-2019/uautomizer/data/4db14549a/76af02d05a6647ffa786e831e288497a [2018-11-18 16:03:15,910 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 16:03:15,911 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 16:03:15,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 16:03:15,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 16:03:15,915 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 16:03:15,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 04:03:15" (1/1) ... [2018-11-18 16:03:15,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b708a34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:03:15, skipping insertion in model container [2018-11-18 16:03:15,919 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 04:03:15" (1/1) ... [2018-11-18 16:03:15,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 16:03:15,940 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 16:03:16,066 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 16:03:16,069 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 16:03:16,079 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 16:03:16,088 INFO L195 MainTranslator]: Completed translation [2018-11-18 16:03:16,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:03:16 WrapperNode [2018-11-18 16:03:16,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 16:03:16,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 16:03:16,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 16:03:16,089 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 16:03:16,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:03:16" (1/1) ... [2018-11-18 16:03:16,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:03:16" (1/1) ... [2018-11-18 16:03:16,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:03:16" (1/1) ... [2018-11-18 16:03:16,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:03:16" (1/1) ... [2018-11-18 16:03:16,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:03:16" (1/1) ... [2018-11-18 16:03:16,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:03:16" (1/1) ... [2018-11-18 16:03:16,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:03:16" (1/1) ... [2018-11-18 16:03:16,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 16:03:16,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 16:03:16,106 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 16:03:16,106 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 16:03:16,107 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:03:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_716bbf9a-03f4-45f3-b565-1fcfce1d999a/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 16:03:16,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 16:03:16,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 16:03:16,183 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2018-11-18 16:03:16,183 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 16:03:16,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-18 16:03:16,183 INFO L130 BoogieDeclarations]: Found specification of procedure g [2018-11-18 16:03:16,184 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 16:03:16,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 16:03:16,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 16:03:16,273 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 16:03:16,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:03:16 BoogieIcfgContainer [2018-11-18 16:03:16,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 16:03:16,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 16:03:16,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 16:03:16,277 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 16:03:16,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 04:03:15" (1/3) ... [2018-11-18 16:03:16,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9a8331 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 04:03:16, skipping insertion in model container [2018-11-18 16:03:16,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:03:16" (2/3) ... [2018-11-18 16:03:16,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9a8331 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 04:03:16, skipping insertion in model container [2018-11-18 16:03:16,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:03:16" (3/3) ... [2018-11-18 16:03:16,280 INFO L112 eAbstractionObserver]: Analyzing ICFG NestedRecursion_2c_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-18 16:03:16,285 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 16:03:16,290 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-11-18 16:03:16,299 INFO L257 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2018-11-18 16:03:16,317 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 16:03:16,317 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 16:03:16,317 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 16:03:16,317 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 16:03:16,317 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 16:03:16,317 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 16:03:16,317 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 16:03:16,318 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 16:03:16,318 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 16:03:16,328 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2018-11-18 16:03:16,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-18 16:03:16,331 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:03:16,332 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:03:16,333 INFO L423 AbstractCegarLoop]: === Iteration 1 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:03:16,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:03:16,337 INFO L82 PathProgramCache]: Analyzing trace with hash -774276160, now seen corresponding path program 1 times [2018-11-18 16:03:16,338 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:03:16,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:03:16,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:16,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:03:16,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:03:16,454 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 16:03:16,456 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:03:16,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 16:03:16,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 16:03:16,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 16:03:16,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 16:03:16,473 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2018-11-18 16:03:16,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:03:16,568 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2018-11-18 16:03:16,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 16:03:16,569 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-11-18 16:03:16,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:03:16,577 INFO L225 Difference]: With dead ends: 46 [2018-11-18 16:03:16,577 INFO L226 Difference]: Without dead ends: 40 [2018-11-18 16:03:16,579 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 16:03:16,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-11-18 16:03:16,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2018-11-18 16:03:16,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-18 16:03:16,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2018-11-18 16:03:16,606 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 10 [2018-11-18 16:03:16,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:03:16,606 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2018-11-18 16:03:16,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 16:03:16,607 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2018-11-18 16:03:16,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-18 16:03:16,607 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:03:16,607 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:03:16,607 INFO L423 AbstractCegarLoop]: === Iteration 2 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:03:16,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:03:16,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1767242855, now seen corresponding path program 1 times [2018-11-18 16:03:16,608 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:03:16,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:03:16,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:16,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:03:16,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:03:16,648 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 16:03:16,651 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:03:16,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 16:03:16,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 16:03:16,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 16:03:16,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 16:03:16,653 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand 5 states. [2018-11-18 16:03:16,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:03:16,697 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2018-11-18 16:03:16,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 16:03:16,698 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-11-18 16:03:16,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:03:16,699 INFO L225 Difference]: With dead ends: 54 [2018-11-18 16:03:16,699 INFO L226 Difference]: Without dead ends: 50 [2018-11-18 16:03:16,699 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 16:03:16,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-11-18 16:03:16,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2018-11-18 16:03:16,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-18 16:03:16,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2018-11-18 16:03:16,708 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 11 [2018-11-18 16:03:16,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:03:16,708 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2018-11-18 16:03:16,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 16:03:16,708 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2018-11-18 16:03:16,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-18 16:03:16,709 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:03:16,709 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:03:16,709 INFO L423 AbstractCegarLoop]: === Iteration 3 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:03:16,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:03:16,710 INFO L82 PathProgramCache]: Analyzing trace with hash -601436741, now seen corresponding path program 1 times [2018-11-18 16:03:16,710 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:03:16,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:03:16,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:16,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:03:16,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:16,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:03:16,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:03:16,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:03:16,769 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_716bbf9a-03f4-45f3-b565-1fcfce1d999a/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 16:03:16,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:03:16,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:03:16,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:03:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:03:16,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:03:16,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-18 16:03:16,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 16:03:16,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 16:03:16,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-18 16:03:16,829 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 7 states. [2018-11-18 16:03:16,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:03:16,913 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2018-11-18 16:03:16,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 16:03:16,913 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-11-18 16:03:16,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:03:16,915 INFO L225 Difference]: With dead ends: 67 [2018-11-18 16:03:16,915 INFO L226 Difference]: Without dead ends: 66 [2018-11-18 16:03:16,915 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-11-18 16:03:16,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-18 16:03:16,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2018-11-18 16:03:16,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-11-18 16:03:16,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2018-11-18 16:03:16,924 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 16 [2018-11-18 16:03:16,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:03:16,925 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2018-11-18 16:03:16,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 16:03:16,925 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2018-11-18 16:03:16,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-18 16:03:16,925 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:03:16,926 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:03:16,926 INFO L423 AbstractCegarLoop]: === Iteration 4 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:03:16,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:03:16,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1839303495, now seen corresponding path program 1 times [2018-11-18 16:03:16,926 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:03:16,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:03:16,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:16,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:03:16,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:03:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 16:03:16,951 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:03:16,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 16:03:16,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 16:03:16,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 16:03:16,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 16:03:16,951 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 3 states. [2018-11-18 16:03:16,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:03:16,959 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2018-11-18 16:03:16,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 16:03:16,959 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2018-11-18 16:03:16,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:03:16,961 INFO L225 Difference]: With dead ends: 56 [2018-11-18 16:03:16,961 INFO L226 Difference]: Without dead ends: 55 [2018-11-18 16:03:16,961 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 16:03:16,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-11-18 16:03:16,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-11-18 16:03:16,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-18 16:03:16,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2018-11-18 16:03:16,969 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 18 [2018-11-18 16:03:16,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:03:16,969 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2018-11-18 16:03:16,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 16:03:16,969 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2018-11-18 16:03:16,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 16:03:16,970 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:03:16,970 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:03:16,970 INFO L423 AbstractCegarLoop]: === Iteration 5 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:03:16,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:03:16,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1183833542, now seen corresponding path program 1 times [2018-11-18 16:03:16,970 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:03:16,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:03:16,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:16,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:03:16,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:03:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 16:03:16,988 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:03:16,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 16:03:16,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 16:03:16,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 16:03:16,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 16:03:16,989 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 4 states. [2018-11-18 16:03:17,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:03:17,006 INFO L93 Difference]: Finished difference Result 81 states and 105 transitions. [2018-11-18 16:03:17,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 16:03:17,006 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2018-11-18 16:03:17,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:03:17,007 INFO L225 Difference]: With dead ends: 81 [2018-11-18 16:03:17,007 INFO L226 Difference]: Without dead ends: 80 [2018-11-18 16:03:17,007 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 16:03:17,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-11-18 16:03:17,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2018-11-18 16:03:17,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-11-18 16:03:17,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2018-11-18 16:03:17,016 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 19 [2018-11-18 16:03:17,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:03:17,016 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2018-11-18 16:03:17,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 16:03:17,016 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2018-11-18 16:03:17,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-18 16:03:17,017 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:03:17,017 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:03:17,017 INFO L423 AbstractCegarLoop]: === Iteration 6 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:03:17,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:03:17,018 INFO L82 PathProgramCache]: Analyzing trace with hash -544755481, now seen corresponding path program 2 times [2018-11-18 16:03:17,018 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:03:17,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:03:17,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:17,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:03:17,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:03:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:03:17,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:03:17,073 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_716bbf9a-03f4-45f3-b565-1fcfce1d999a/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 16:03:17,079 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 16:03:17,088 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 16:03:17,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:03:17,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:03:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:03:17,110 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:03:17,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-18 16:03:17,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 16:03:17,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 16:03:17,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-11-18 16:03:17,111 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand 9 states. [2018-11-18 16:03:17,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:03:17,225 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2018-11-18 16:03:17,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 16:03:17,226 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2018-11-18 16:03:17,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:03:17,227 INFO L225 Difference]: With dead ends: 94 [2018-11-18 16:03:17,227 INFO L226 Difference]: Without dead ends: 93 [2018-11-18 16:03:17,228 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2018-11-18 16:03:17,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-11-18 16:03:17,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2018-11-18 16:03:17,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-11-18 16:03:17,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 109 transitions. [2018-11-18 16:03:17,239 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 109 transitions. Word has length 21 [2018-11-18 16:03:17,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:03:17,239 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 109 transitions. [2018-11-18 16:03:17,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 16:03:17,239 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 109 transitions. [2018-11-18 16:03:17,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-18 16:03:17,240 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:03:17,240 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:03:17,240 INFO L423 AbstractCegarLoop]: === Iteration 7 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:03:17,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:03:17,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1671679351, now seen corresponding path program 1 times [2018-11-18 16:03:17,241 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:03:17,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:03:17,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:17,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:03:17,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:17,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:03:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 16:03:17,292 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:03:17,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 16:03:17,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 16:03:17,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 16:03:17,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-18 16:03:17,293 INFO L87 Difference]: Start difference. First operand 90 states and 109 transitions. Second operand 6 states. [2018-11-18 16:03:17,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:03:17,399 INFO L93 Difference]: Finished difference Result 121 states and 153 transitions. [2018-11-18 16:03:17,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 16:03:17,400 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2018-11-18 16:03:17,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:03:17,401 INFO L225 Difference]: With dead ends: 121 [2018-11-18 16:03:17,401 INFO L226 Difference]: Without dead ends: 120 [2018-11-18 16:03:17,401 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-11-18 16:03:17,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-11-18 16:03:17,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 113. [2018-11-18 16:03:17,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-11-18 16:03:17,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 147 transitions. [2018-11-18 16:03:17,414 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 147 transitions. Word has length 23 [2018-11-18 16:03:17,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:03:17,414 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 147 transitions. [2018-11-18 16:03:17,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 16:03:17,414 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 147 transitions. [2018-11-18 16:03:17,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-18 16:03:17,415 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:03:17,415 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:03:17,415 INFO L423 AbstractCegarLoop]: === Iteration 8 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:03:17,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:03:17,416 INFO L82 PathProgramCache]: Analyzing trace with hash -282452290, now seen corresponding path program 1 times [2018-11-18 16:03:17,416 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:03:17,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:03:17,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:17,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:03:17,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:17,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:03:17,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 16:03:17,449 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:03:17,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 16:03:17,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 16:03:17,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 16:03:17,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-18 16:03:17,449 INFO L87 Difference]: Start difference. First operand 113 states and 147 transitions. Second operand 6 states. [2018-11-18 16:03:17,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:03:17,547 INFO L93 Difference]: Finished difference Result 139 states and 178 transitions. [2018-11-18 16:03:17,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 16:03:17,548 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2018-11-18 16:03:17,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:03:17,549 INFO L225 Difference]: With dead ends: 139 [2018-11-18 16:03:17,549 INFO L226 Difference]: Without dead ends: 138 [2018-11-18 16:03:17,550 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-11-18 16:03:17,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-11-18 16:03:17,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 129. [2018-11-18 16:03:17,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-11-18 16:03:17,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 164 transitions. [2018-11-18 16:03:17,564 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 164 transitions. Word has length 24 [2018-11-18 16:03:17,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:03:17,564 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 164 transitions. [2018-11-18 16:03:17,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 16:03:17,565 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 164 transitions. [2018-11-18 16:03:17,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-18 16:03:17,565 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:03:17,565 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:03:17,566 INFO L423 AbstractCegarLoop]: === Iteration 9 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:03:17,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:03:17,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1622021829, now seen corresponding path program 3 times [2018-11-18 16:03:17,566 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:03:17,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:03:17,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:17,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:03:17,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:03:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:03:17,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:03:17,661 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_716bbf9a-03f4-45f3-b565-1fcfce1d999a/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 16:03:17,666 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 16:03:17,673 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-18 16:03:17,673 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:03:17,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:03:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:03:17,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:03:17,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-18 16:03:17,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 16:03:17,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 16:03:17,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-18 16:03:17,696 INFO L87 Difference]: Start difference. First operand 129 states and 164 transitions. Second operand 11 states. [2018-11-18 16:03:17,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:03:17,803 INFO L93 Difference]: Finished difference Result 154 states and 196 transitions. [2018-11-18 16:03:17,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-18 16:03:17,803 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2018-11-18 16:03:17,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:03:17,804 INFO L225 Difference]: With dead ends: 154 [2018-11-18 16:03:17,804 INFO L226 Difference]: Without dead ends: 153 [2018-11-18 16:03:17,805 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2018-11-18 16:03:17,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-11-18 16:03:17,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2018-11-18 16:03:17,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-11-18 16:03:17,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 187 transitions. [2018-11-18 16:03:17,817 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 187 transitions. Word has length 26 [2018-11-18 16:03:17,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:03:17,818 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 187 transitions. [2018-11-18 16:03:17,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 16:03:17,818 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 187 transitions. [2018-11-18 16:03:17,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-18 16:03:17,819 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:03:17,819 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:03:17,819 INFO L423 AbstractCegarLoop]: === Iteration 10 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:03:17,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:03:17,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1947044292, now seen corresponding path program 2 times [2018-11-18 16:03:17,820 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:03:17,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:03:17,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:17,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:03:17,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:03:17,860 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 16:03:17,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:03:17,861 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_716bbf9a-03f4-45f3-b565-1fcfce1d999a/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 16:03:17,866 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 16:03:17,872 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 16:03:17,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:03:17,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:03:17,877 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 16:03:17,892 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:03:17,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-18 16:03:17,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 16:03:17,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 16:03:17,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-11-18 16:03:17,893 INFO L87 Difference]: Start difference. First operand 147 states and 187 transitions. Second operand 8 states. [2018-11-18 16:03:18,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:03:18,005 INFO L93 Difference]: Finished difference Result 178 states and 228 transitions. [2018-11-18 16:03:18,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 16:03:18,006 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-11-18 16:03:18,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:03:18,007 INFO L225 Difference]: With dead ends: 178 [2018-11-18 16:03:18,007 INFO L226 Difference]: Without dead ends: 177 [2018-11-18 16:03:18,007 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2018-11-18 16:03:18,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-11-18 16:03:18,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 165. [2018-11-18 16:03:18,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-11-18 16:03:18,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 210 transitions. [2018-11-18 16:03:18,017 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 210 transitions. Word has length 29 [2018-11-18 16:03:18,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:03:18,018 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 210 transitions. [2018-11-18 16:03:18,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 16:03:18,018 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 210 transitions. [2018-11-18 16:03:18,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-18 16:03:18,019 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:03:18,019 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:03:18,019 INFO L423 AbstractCegarLoop]: === Iteration 11 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:03:18,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:03:18,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1283573095, now seen corresponding path program 4 times [2018-11-18 16:03:18,020 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:03:18,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:03:18,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:18,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:03:18,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:03:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:03:18,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:03:18,113 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_716bbf9a-03f4-45f3-b565-1fcfce1d999a/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 16:03:18,119 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 16:03:18,127 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 16:03:18,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:03:18,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:03:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-11-18 16:03:18,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:03:18,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 13 [2018-11-18 16:03:18,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 16:03:18,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 16:03:18,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2018-11-18 16:03:18,183 INFO L87 Difference]: Start difference. First operand 165 states and 210 transitions. Second operand 14 states. [2018-11-18 16:03:18,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:03:18,241 INFO L93 Difference]: Finished difference Result 169 states and 219 transitions. [2018-11-18 16:03:18,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 16:03:18,241 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2018-11-18 16:03:18,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:03:18,242 INFO L225 Difference]: With dead ends: 169 [2018-11-18 16:03:18,243 INFO L226 Difference]: Without dead ends: 168 [2018-11-18 16:03:18,243 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2018-11-18 16:03:18,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-11-18 16:03:18,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 165. [2018-11-18 16:03:18,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-11-18 16:03:18,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 209 transitions. [2018-11-18 16:03:18,253 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 209 transitions. Word has length 31 [2018-11-18 16:03:18,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:03:18,254 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 209 transitions. [2018-11-18 16:03:18,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 16:03:18,254 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 209 transitions. [2018-11-18 16:03:18,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-18 16:03:18,255 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:03:18,255 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:03:18,255 INFO L423 AbstractCegarLoop]: === Iteration 12 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:03:18,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:03:18,255 INFO L82 PathProgramCache]: Analyzing trace with hash 634524286, now seen corresponding path program 3 times [2018-11-18 16:03:18,255 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:03:18,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:03:18,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:18,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:03:18,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:03:18,327 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 16:03:18,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:03:18,327 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_716bbf9a-03f4-45f3-b565-1fcfce1d999a/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 16:03:18,347 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 16:03:18,363 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-11-18 16:03:18,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:03:18,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:03:18,370 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 16:03:18,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:03:18,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-18 16:03:18,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 16:03:18,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 16:03:18,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-11-18 16:03:18,386 INFO L87 Difference]: Start difference. First operand 165 states and 209 transitions. Second operand 10 states. [2018-11-18 16:03:18,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:03:18,550 INFO L93 Difference]: Finished difference Result 198 states and 252 transitions. [2018-11-18 16:03:18,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-18 16:03:18,550 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-11-18 16:03:18,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:03:18,551 INFO L225 Difference]: With dead ends: 198 [2018-11-18 16:03:18,551 INFO L226 Difference]: Without dead ends: 197 [2018-11-18 16:03:18,552 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2018-11-18 16:03:18,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-11-18 16:03:18,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 183. [2018-11-18 16:03:18,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-11-18 16:03:18,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 232 transitions. [2018-11-18 16:03:18,562 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 232 transitions. Word has length 34 [2018-11-18 16:03:18,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:03:18,562 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 232 transitions. [2018-11-18 16:03:18,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 16:03:18,563 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 232 transitions. [2018-11-18 16:03:18,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-18 16:03:18,563 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:03:18,564 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:03:18,564 INFO L423 AbstractCegarLoop]: === Iteration 13 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:03:18,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:03:18,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1824264805, now seen corresponding path program 1 times [2018-11-18 16:03:18,564 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:03:18,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:03:18,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:18,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:03:18,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:03:18,595 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-18 16:03:18,595 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:03:18,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 16:03:18,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 16:03:18,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 16:03:18,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 16:03:18,596 INFO L87 Difference]: Start difference. First operand 183 states and 232 transitions. Second operand 5 states. [2018-11-18 16:03:18,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:03:18,612 INFO L93 Difference]: Finished difference Result 183 states and 232 transitions. [2018-11-18 16:03:18,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 16:03:18,613 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2018-11-18 16:03:18,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:03:18,613 INFO L225 Difference]: With dead ends: 183 [2018-11-18 16:03:18,613 INFO L226 Difference]: Without dead ends: 182 [2018-11-18 16:03:18,614 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 16:03:18,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-11-18 16:03:18,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-11-18 16:03:18,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-11-18 16:03:18,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 222 transitions. [2018-11-18 16:03:18,622 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 222 transitions. Word has length 35 [2018-11-18 16:03:18,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:03:18,622 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 222 transitions. [2018-11-18 16:03:18,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 16:03:18,622 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 222 transitions. [2018-11-18 16:03:18,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-18 16:03:18,622 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:03:18,622 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:03:18,622 INFO L423 AbstractCegarLoop]: === Iteration 14 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:03:18,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:03:18,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1057484292, now seen corresponding path program 4 times [2018-11-18 16:03:18,623 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:03:18,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:03:18,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:18,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:03:18,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:18,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:03:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 16:03:18,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:03:18,684 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_716bbf9a-03f4-45f3-b565-1fcfce1d999a/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 16:03:18,690 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 16:03:18,697 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 16:03:18,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:03:18,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:03:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-11-18 16:03:18,737 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 16:03:18,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2018-11-18 16:03:18,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 16:03:18,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 16:03:18,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2018-11-18 16:03:18,738 INFO L87 Difference]: Start difference. First operand 182 states and 222 transitions. Second operand 16 states. [2018-11-18 16:03:18,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:03:18,794 INFO L93 Difference]: Finished difference Result 243 states and 307 transitions. [2018-11-18 16:03:18,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 16:03:18,794 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2018-11-18 16:03:18,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:03:18,795 INFO L225 Difference]: With dead ends: 243 [2018-11-18 16:03:18,795 INFO L226 Difference]: Without dead ends: 115 [2018-11-18 16:03:18,797 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2018-11-18 16:03:18,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-11-18 16:03:18,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2018-11-18 16:03:18,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-11-18 16:03:18,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 130 transitions. [2018-11-18 16:03:18,806 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 130 transitions. Word has length 39 [2018-11-18 16:03:18,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:03:18,806 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 130 transitions. [2018-11-18 16:03:18,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 16:03:18,806 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 130 transitions. [2018-11-18 16:03:18,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-18 16:03:18,807 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:03:18,807 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:03:18,808 INFO L423 AbstractCegarLoop]: === Iteration 15 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:03:18,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:03:18,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1307639896, now seen corresponding path program 1 times [2018-11-18 16:03:18,808 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:03:18,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:03:18,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:18,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:03:18,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:03:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-18 16:03:18,856 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:03:18,856 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 16:03:18,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 16:03:18,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 16:03:18,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 16:03:18,857 INFO L87 Difference]: Start difference. First operand 110 states and 130 transitions. Second operand 5 states. [2018-11-18 16:03:18,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:03:18,894 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2018-11-18 16:03:18,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 16:03:18,895 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2018-11-18 16:03:18,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:03:18,896 INFO L225 Difference]: With dead ends: 110 [2018-11-18 16:03:18,896 INFO L226 Difference]: Without dead ends: 109 [2018-11-18 16:03:18,897 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-18 16:03:18,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-11-18 16:03:18,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-11-18 16:03:18,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-11-18 16:03:18,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 129 transitions. [2018-11-18 16:03:18,903 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 129 transitions. Word has length 39 [2018-11-18 16:03:18,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:03:18,903 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 129 transitions. [2018-11-18 16:03:18,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 16:03:18,903 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 129 transitions. [2018-11-18 16:03:18,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-18 16:03:18,904 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:03:18,904 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:03:18,904 INFO L423 AbstractCegarLoop]: === Iteration 16 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:03:18,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:03:18,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1882131073, now seen corresponding path program 1 times [2018-11-18 16:03:18,904 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:03:18,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:03:18,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:18,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:03:18,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:03:18,945 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-18 16:03:18,946 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:03:18,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-18 16:03:18,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 16:03:18,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 16:03:18,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-18 16:03:18,946 INFO L87 Difference]: Start difference. First operand 109 states and 129 transitions. Second operand 7 states. [2018-11-18 16:03:19,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:03:19,009 INFO L93 Difference]: Finished difference Result 128 states and 152 transitions. [2018-11-18 16:03:19,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 16:03:19,009 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2018-11-18 16:03:19,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:03:19,010 INFO L225 Difference]: With dead ends: 128 [2018-11-18 16:03:19,010 INFO L226 Difference]: Without dead ends: 127 [2018-11-18 16:03:19,011 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2018-11-18 16:03:19,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-11-18 16:03:19,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2018-11-18 16:03:19,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-11-18 16:03:19,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2018-11-18 16:03:19,017 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 40 [2018-11-18 16:03:19,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:03:19,017 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2018-11-18 16:03:19,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 16:03:19,018 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2018-11-18 16:03:19,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-18 16:03:19,018 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:03:19,018 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:03:19,019 INFO L423 AbstractCegarLoop]: === Iteration 17 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:03:19,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:03:19,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1047280733, now seen corresponding path program 2 times [2018-11-18 16:03:19,019 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:03:19,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:03:19,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:19,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:03:19,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:03:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-18 16:03:19,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:03:19,075 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_716bbf9a-03f4-45f3-b565-1fcfce1d999a/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 16:03:19,084 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 16:03:19,095 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 16:03:19,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:03:19,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:03:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-18 16:03:19,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:03:19,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-18 16:03:19,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 16:03:19,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 16:03:19,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-11-18 16:03:19,119 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand 9 states. [2018-11-18 16:03:19,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:03:19,239 INFO L93 Difference]: Finished difference Result 144 states and 166 transitions. [2018-11-18 16:03:19,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-18 16:03:19,243 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2018-11-18 16:03:19,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:03:19,244 INFO L225 Difference]: With dead ends: 144 [2018-11-18 16:03:19,244 INFO L226 Difference]: Without dead ends: 143 [2018-11-18 16:03:19,244 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2018-11-18 16:03:19,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-11-18 16:03:19,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-11-18 16:03:19,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-11-18 16:03:19,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 165 transitions. [2018-11-18 16:03:19,251 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 165 transitions. Word has length 45 [2018-11-18 16:03:19,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:03:19,252 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 165 transitions. [2018-11-18 16:03:19,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 16:03:19,252 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 165 transitions. [2018-11-18 16:03:19,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-18 16:03:19,252 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:03:19,252 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:03:19,253 INFO L423 AbstractCegarLoop]: === Iteration 18 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:03:19,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:03:19,253 INFO L82 PathProgramCache]: Analyzing trace with hash 483404799, now seen corresponding path program 3 times [2018-11-18 16:03:19,253 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:03:19,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:03:19,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:19,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:03:19,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:03:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 48 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-18 16:03:19,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:03:19,313 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_716bbf9a-03f4-45f3-b565-1fcfce1d999a/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 16:03:19,319 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 16:03:19,330 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-18 16:03:19,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:03:19,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:03:19,337 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 48 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-18 16:03:19,352 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:03:19,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-18 16:03:19,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 16:03:19,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 16:03:19,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-11-18 16:03:19,353 INFO L87 Difference]: Start difference. First operand 143 states and 165 transitions. Second operand 11 states. [2018-11-18 16:03:19,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:03:19,530 INFO L93 Difference]: Finished difference Result 162 states and 187 transitions. [2018-11-18 16:03:19,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-18 16:03:19,530 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2018-11-18 16:03:19,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:03:19,531 INFO L225 Difference]: With dead ends: 162 [2018-11-18 16:03:19,531 INFO L226 Difference]: Without dead ends: 161 [2018-11-18 16:03:19,531 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2018-11-18 16:03:19,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-11-18 16:03:19,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-11-18 16:03:19,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-11-18 16:03:19,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 186 transitions. [2018-11-18 16:03:19,536 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 186 transitions. Word has length 50 [2018-11-18 16:03:19,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:03:19,536 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 186 transitions. [2018-11-18 16:03:19,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 16:03:19,536 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 186 transitions. [2018-11-18 16:03:19,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-18 16:03:19,537 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:03:19,537 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:03:19,537 INFO L423 AbstractCegarLoop]: === Iteration 19 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:03:19,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:03:19,537 INFO L82 PathProgramCache]: Analyzing trace with hash 2081594659, now seen corresponding path program 4 times [2018-11-18 16:03:19,537 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:03:19,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:03:19,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:19,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:03:19,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:03:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 62 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-18 16:03:19,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:03:19,626 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_716bbf9a-03f4-45f3-b565-1fcfce1d999a/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:03:19,636 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 16:03:19,658 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 16:03:19,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:03:19,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:03:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 62 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-18 16:03:19,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:03:19,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-18 16:03:19,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 16:03:19,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 16:03:19,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-11-18 16:03:19,683 INFO L87 Difference]: Start difference. First operand 161 states and 186 transitions. Second operand 13 states. [2018-11-18 16:03:19,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:03:19,898 INFO L93 Difference]: Finished difference Result 180 states and 208 transitions. [2018-11-18 16:03:19,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-18 16:03:19,899 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2018-11-18 16:03:19,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:03:19,900 INFO L225 Difference]: With dead ends: 180 [2018-11-18 16:03:19,900 INFO L226 Difference]: Without dead ends: 179 [2018-11-18 16:03:19,901 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2018-11-18 16:03:19,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-11-18 16:03:19,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-11-18 16:03:19,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-11-18 16:03:19,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 207 transitions. [2018-11-18 16:03:19,909 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 207 transitions. Word has length 55 [2018-11-18 16:03:19,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:03:19,909 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 207 transitions. [2018-11-18 16:03:19,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 16:03:19,909 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 207 transitions. [2018-11-18 16:03:19,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-11-18 16:03:19,910 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:03:19,910 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:03:19,911 INFO L423 AbstractCegarLoop]: === Iteration 20 === [gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:03:19,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:03:19,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1729970815, now seen corresponding path program 5 times [2018-11-18 16:03:19,911 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:03:19,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:03:19,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:19,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:03:19,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:03:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:03:20,018 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 76 proven. 46 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-18 16:03:20,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:03:20,018 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_716bbf9a-03f4-45f3-b565-1fcfce1d999a/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:03:20,025 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 16:03:20,032 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-11-18 16:03:20,032 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:03:20,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:03:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-11-18 16:03:20,089 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 16:03:20,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [14] total 20 [2018-11-18 16:03:20,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-18 16:03:20,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-18 16:03:20,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2018-11-18 16:03:20,090 INFO L87 Difference]: Start difference. First operand 179 states and 207 transitions. Second operand 20 states. [2018-11-18 16:03:20,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:03:20,152 INFO L93 Difference]: Finished difference Result 219 states and 255 transitions. [2018-11-18 16:03:20,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 16:03:20,153 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-11-18 16:03:20,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:03:20,154 INFO L225 Difference]: With dead ends: 219 [2018-11-18 16:03:20,154 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 16:03:20,155 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2018-11-18 16:03:20,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 16:03:20,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 16:03:20,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 16:03:20,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 16:03:20,155 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 60 [2018-11-18 16:03:20,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:03:20,156 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 16:03:20,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-18 16:03:20,156 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 16:03:20,156 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 16:03:20,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 16:03:20,206 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 16:03:20,211 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 16:03:20,220 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 16:03:20,228 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 16:03:20,232 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 16:03:20,245 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 16:03:20,385 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 16:03:20,386 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 16:03:20,386 INFO L425 ceAbstractionStarter]: For program point gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2018-11-18 16:03:20,386 INFO L425 ceAbstractionStarter]: For program point gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2018-11-18 16:03:20,386 INFO L425 ceAbstractionStarter]: For program point gFINAL(lines 10 16) no Hoare annotation was computed. [2018-11-18 16:03:20,386 INFO L425 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-11-18 16:03:20,386 INFO L425 ceAbstractionStarter]: For program point L15-1(line 15) no Hoare annotation was computed. [2018-11-18 16:03:20,386 INFO L421 ceAbstractionStarter]: At program point L15-2(line 15) the Hoare annotation is: (and (or (and (<= 0 g_~x) (<= g_~x 2147483647) (not (= 0 g_~x))) (< |g_#in~x| 0) (< 2147483647 |g_#in~x|)) (not (= |g_#in~x| 0))) [2018-11-18 16:03:20,386 INFO L425 ceAbstractionStarter]: For program point L12(lines 12 15) no Hoare annotation was computed. [2018-11-18 16:03:20,386 INFO L425 ceAbstractionStarter]: For program point L15-3(line 15) no Hoare annotation was computed. [2018-11-18 16:03:20,387 INFO L425 ceAbstractionStarter]: For program point L15-4(line 15) no Hoare annotation was computed. [2018-11-18 16:03:20,387 INFO L425 ceAbstractionStarter]: For program point L15-5(line 15) no Hoare annotation was computed. [2018-11-18 16:03:20,387 INFO L421 ceAbstractionStarter]: At program point L15-6(line 15) the Hoare annotation is: (and (not (= |g_#in~x| 0)) (or (and (<= 0 g_~x) (= 1 |g_#t~ret0|) (<= g_~x 2147483647) (not (= 0 g_~x))) (< |g_#in~x| 0) (< 2147483647 |g_#in~x|))) [2018-11-18 16:03:20,387 INFO L425 ceAbstractionStarter]: For program point gEXIT(lines 10 16) no Hoare annotation was computed. [2018-11-18 16:03:20,387 INFO L425 ceAbstractionStarter]: For program point L15-7(line 15) no Hoare annotation was computed. [2018-11-18 16:03:20,387 INFO L425 ceAbstractionStarter]: For program point gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2018-11-18 16:03:20,387 INFO L425 ceAbstractionStarter]: For program point gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2018-11-18 16:03:20,387 INFO L428 ceAbstractionStarter]: At program point gENTRY(lines 10 16) the Hoare annotation is: true [2018-11-18 16:03:20,387 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 16:03:20,387 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 16:03:20,387 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 16:03:20,388 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 16:03:20,388 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 18 22) the Hoare annotation is: true [2018-11-18 16:03:20,388 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 18 22) no Hoare annotation was computed. [2018-11-18 16:03:20,388 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 18 22) no Hoare annotation was computed. [2018-11-18 16:03:20,388 INFO L421 ceAbstractionStarter]: At program point L21(line 21) the Hoare annotation is: (and (<= main_~x~0 2147483647) (<= 0 main_~x~0)) [2018-11-18 16:03:20,388 INFO L425 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2018-11-18 16:03:20,388 INFO L425 ceAbstractionStarter]: For program point L21-1(line 21) no Hoare annotation was computed. [2018-11-18 16:03:20,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 04:03:20 BoogieIcfgContainer [2018-11-18 16:03:20,390 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 16:03:20,391 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 16:03:20,391 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 16:03:20,391 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 16:03:20,391 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:03:16" (3/4) ... [2018-11-18 16:03:20,394 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 16:03:20,400 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 16:03:20,400 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure g [2018-11-18 16:03:20,400 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 16:03:20,404 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2018-11-18 16:03:20,404 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-18 16:03:20,404 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 16:03:20,437 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_716bbf9a-03f4-45f3-b565-1fcfce1d999a/bin-2019/uautomizer/witness.graphml [2018-11-18 16:03:20,437 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 16:03:20,438 INFO L168 Benchmark]: Toolchain (without parser) took 4527.14 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 172.0 MB). Free memory was 959.1 MB in the beginning and 1.1 GB in the end (delta: -185.8 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 16:03:20,439 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 16:03:20,439 INFO L168 Benchmark]: CACSL2BoogieTranslator took 176.67 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 16:03:20,439 INFO L168 Benchmark]: Boogie Preprocessor took 16.84 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 16:03:20,440 INFO L168 Benchmark]: RCFGBuilder took 167.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.1 MB). Free memory was 948.4 MB in the beginning and 1.1 GB in the end (delta: -153.4 MB). Peak memory consumption was 16.7 MB. Max. memory is 11.5 GB. [2018-11-18 16:03:20,440 INFO L168 Benchmark]: TraceAbstraction took 4116.05 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 50.9 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -43.2 MB). Peak memory consumption was 294.2 MB. Max. memory is 11.5 GB. [2018-11-18 16:03:20,440 INFO L168 Benchmark]: Witness Printer took 46.71 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 16:03:20,442 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 176.67 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.84 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 167.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.1 MB). Free memory was 948.4 MB in the beginning and 1.1 GB in the end (delta: -153.4 MB). Peak memory consumption was 16.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4116.05 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 50.9 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -43.2 MB). Peak memory consumption was 294.2 MB. Max. memory is 11.5 GB. * Witness Printer took 46.71 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 28 locations, 4 error locations. SAFE Result, 4.0s OverallTime, 20 OverallIterations, 9 TraceHistogramMax, 1.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 461 SDtfs, 662 SDslu, 1992 SDs, 0 SdLazy, 1550 SolverSat, 348 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 671 GetRequests, 425 SyntacticMatches, 4 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=183occurred in iteration=12, 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: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 89 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 173 PreInvPairs, 191 NumberOfFragments, 65 HoareAnnotationTreeSize, 173 FomulaSimplifications, 631 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 401 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 1031 NumberOfCodeBlocks, 986 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 1000 ConstructedInterpolants, 0 QuantifiedInterpolants, 89882 SizeOfPredicates, 30 NumberOfNonLiveVariables, 736 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 31 InterpolantComputations, 11 PerfectInterpolantSequences, 934/1271 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...