./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_41cd626f-0736-4f08-81bc-049e1e7d338a/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_41cd626f-0736-4f08-81bc-049e1e7d338a/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_41cd626f-0736-4f08-81bc-049e1e7d338a/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_41cd626f-0736-4f08-81bc-049e1e7d338a/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c -s /tmp/vcloud-vcloud-master/worker/working_dir_41cd626f-0736-4f08-81bc-049e1e7d338a/bin-2019/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_41cd626f-0736-4f08-81bc-049e1e7d338a/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 cb528549fa76ae8087cf7043645dfa20323a0116 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 10:33:39,797 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 10:33:39,798 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 10:33:39,805 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 10:33:39,805 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 10:33:39,806 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 10:33:39,807 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 10:33:39,808 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 10:33:39,809 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 10:33:39,810 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 10:33:39,810 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 10:33:39,810 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 10:33:39,811 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 10:33:39,812 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 10:33:39,812 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 10:33:39,813 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 10:33:39,814 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 10:33:39,815 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 10:33:39,816 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 10:33:39,817 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 10:33:39,818 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 10:33:39,819 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 10:33:39,820 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 10:33:39,820 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 10:33:39,821 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 10:33:39,821 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 10:33:39,822 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 10:33:39,823 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 10:33:39,823 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 10:33:39,824 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 10:33:39,824 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 10:33:39,825 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 10:33:39,825 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 10:33:39,825 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 10:33:39,826 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 10:33:39,827 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 10:33:39,827 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_41cd626f-0736-4f08-81bc-049e1e7d338a/bin-2019/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf [2018-11-28 10:33:39,836 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 10:33:39,836 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 10:33:39,837 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 10:33:39,837 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 10:33:39,837 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 10:33:39,838 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 10:33:39,838 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 10:33:39,838 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 10:33:39,838 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-28 10:33:39,838 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 10:33:39,838 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 10:33:39,838 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 10:33:39,839 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 10:33:39,839 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 10:33:39,839 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-11-28 10:33:39,839 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 10:33:39,839 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 10:33:39,839 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 10:33:39,839 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 10:33:39,839 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 10:33:39,840 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 10:33:39,840 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 10:33:39,840 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 10:33:39,840 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 10:33:39,840 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 10:33:39,840 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 10:33:39,840 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 10:33:39,840 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 10:33:39,841 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 10:33:39,841 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_41cd626f-0736-4f08-81bc-049e1e7d338a/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 -> cb528549fa76ae8087cf7043645dfa20323a0116 [2018-11-28 10:33:39,864 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 10:33:39,873 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 10:33:39,876 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 10:33:39,876 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 10:33:39,877 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 10:33:39,877 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_41cd626f-0736-4f08-81bc-049e1e7d338a/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-28 10:33:39,917 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_41cd626f-0736-4f08-81bc-049e1e7d338a/bin-2019/uautomizer/data/b24249ee7/2fce814a8a514a188438ca5a7407521f/FLAG2c5ed3e3d [2018-11-28 10:33:40,257 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 10:33:40,258 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_41cd626f-0736-4f08-81bc-049e1e7d338a/sv-benchmarks/c/termination-crafted/NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-28 10:33:40,262 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_41cd626f-0736-4f08-81bc-049e1e7d338a/bin-2019/uautomizer/data/b24249ee7/2fce814a8a514a188438ca5a7407521f/FLAG2c5ed3e3d [2018-11-28 10:33:40,681 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_41cd626f-0736-4f08-81bc-049e1e7d338a/bin-2019/uautomizer/data/b24249ee7/2fce814a8a514a188438ca5a7407521f [2018-11-28 10:33:40,683 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 10:33:40,684 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 10:33:40,685 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 10:33:40,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 10:33:40,688 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 10:33:40,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 10:33:40" (1/1) ... [2018-11-28 10:33:40,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8801579 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:40, skipping insertion in model container [2018-11-28 10:33:40,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 10:33:40" (1/1) ... [2018-11-28 10:33:40,698 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 10:33:40,707 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 10:33:40,808 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 10:33:40,811 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 10:33:40,821 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 10:33:40,831 INFO L195 MainTranslator]: Completed translation [2018-11-28 10:33:40,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:40 WrapperNode [2018-11-28 10:33:40,832 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 10:33:40,832 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 10:33:40,832 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 10:33:40,833 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 10:33:40,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:40" (1/1) ... [2018-11-28 10:33:40,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:40" (1/1) ... [2018-11-28 10:33:40,845 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 10:33:40,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 10:33:40,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 10:33:40,845 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 10:33:40,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:40" (1/1) ... [2018-11-28 10:33:40,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:40" (1/1) ... [2018-11-28 10:33:40,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:40" (1/1) ... [2018-11-28 10:33:40,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:40" (1/1) ... [2018-11-28 10:33:40,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:40" (1/1) ... [2018-11-28 10:33:40,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:40" (1/1) ... [2018-11-28 10:33:40,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:40" (1/1) ... [2018-11-28 10:33:40,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 10:33:40,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 10:33:40,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 10:33:40,857 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 10:33:40,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41cd626f-0736-4f08-81bc-049e1e7d338a/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 10:33:40,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 10:33:40,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 10:33:40,941 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2018-11-28 10:33:40,941 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2018-11-28 10:33:40,941 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2018-11-28 10:33:40,941 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2018-11-28 10:33:40,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 10:33:40,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 10:33:40,942 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 10:33:40,942 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 10:33:41,072 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 10:33:41,072 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 10:33:41,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 10:33:41 BoogieIcfgContainer [2018-11-28 10:33:41,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 10:33:41,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 10:33:41,074 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 10:33:41,076 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 10:33:41,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 10:33:40" (1/3) ... [2018-11-28 10:33:41,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c65a9bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 10:33:41, skipping insertion in model container [2018-11-28 10:33:41,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:40" (2/3) ... [2018-11-28 10:33:41,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c65a9bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 10:33:41, skipping insertion in model container [2018-11-28 10:33:41,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 10:33:41" (3/3) ... [2018-11-28 10:33:41,079 INFO L112 eAbstractionObserver]: Analyzing ICFG NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-28 10:33:41,087 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 10:33:41,091 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2018-11-28 10:33:41,100 INFO L257 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2018-11-28 10:33:41,119 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 10:33:41,119 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 10:33:41,119 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 10:33:41,119 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 10:33:41,119 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 10:33:41,119 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 10:33:41,119 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 10:33:41,120 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 10:33:41,120 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 10:33:41,132 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2018-11-28 10:33:41,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-28 10:33:41,136 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:41,136 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:41,138 INFO L423 AbstractCegarLoop]: === Iteration 1 === [rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 10:33:41,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:41,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1147028286, now seen corresponding path program 1 times [2018-11-28 10:33:41,143 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:41,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:41,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:41,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:41,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:41,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:33:41,265 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:41,265 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 10:33:41,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 10:33:41,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 10:33:41,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 10:33:41,278 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 5 states. [2018-11-28 10:33:41,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:41,352 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2018-11-28 10:33:41,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 10:33:41,354 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-11-28 10:33:41,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:41,360 INFO L225 Difference]: With dead ends: 67 [2018-11-28 10:33:41,360 INFO L226 Difference]: Without dead ends: 59 [2018-11-28 10:33:41,362 INFO L631 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 [2018-11-28 10:33:41,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-28 10:33:41,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2018-11-28 10:33:41,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-28 10:33:41,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2018-11-28 10:33:41,390 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 9 [2018-11-28 10:33:41,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:41,390 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2018-11-28 10:33:41,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 10:33:41,390 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2018-11-28 10:33:41,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-28 10:33:41,391 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:41,391 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:41,391 INFO L423 AbstractCegarLoop]: === Iteration 2 === [rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 10:33:41,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:41,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1198138435, now seen corresponding path program 1 times [2018-11-28 10:33:41,391 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:41,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:41,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:41,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:41,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:33:41,404 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:41,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 10:33:41,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 10:33:41,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 10:33:41,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 10:33:41,406 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 3 states. [2018-11-28 10:33:41,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:41,421 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2018-11-28 10:33:41,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 10:33:41,421 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-11-28 10:33:41,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:41,422 INFO L225 Difference]: With dead ends: 56 [2018-11-28 10:33:41,422 INFO L226 Difference]: Without dead ends: 55 [2018-11-28 10:33:41,423 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 10:33:41,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-11-28 10:33:41,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2018-11-28 10:33:41,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-11-28 10:33:41,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2018-11-28 10:33:41,431 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 10 [2018-11-28 10:33:41,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:41,431 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2018-11-28 10:33:41,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 10:33:41,432 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2018-11-28 10:33:41,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-28 10:33:41,432 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:41,432 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:41,433 INFO L423 AbstractCegarLoop]: === Iteration 3 === [rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 10:33:41,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:41,433 INFO L82 PathProgramCache]: Analyzing trace with hash 2126464488, now seen corresponding path program 1 times [2018-11-28 10:33:41,433 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:41,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:41,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:41,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:41,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:33:41,466 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:41,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 10:33:41,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 10:33:41,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 10:33:41,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 10:33:41,467 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 5 states. [2018-11-28 10:33:41,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:41,570 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2018-11-28 10:33:41,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 10:33:41,571 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-28 10:33:41,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:41,572 INFO L225 Difference]: With dead ends: 77 [2018-11-28 10:33:41,572 INFO L226 Difference]: Without dead ends: 76 [2018-11-28 10:33:41,572 INFO L631 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 [2018-11-28 10:33:41,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-11-28 10:33:41,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2018-11-28 10:33:41,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-28 10:33:41,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2018-11-28 10:33:41,584 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 14 [2018-11-28 10:33:41,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:41,584 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2018-11-28 10:33:41,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 10:33:41,584 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2018-11-28 10:33:41,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-28 10:33:41,585 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:41,585 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:41,585 INFO L423 AbstractCegarLoop]: === Iteration 4 === [rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 10:33:41,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:41,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1495889727, now seen corresponding path program 1 times [2018-11-28 10:33:41,587 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:41,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:41,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:41,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:41,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:41,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:33:41,607 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:41,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 10:33:41,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 10:33:41,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 10:33:41,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 10:33:41,608 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand 3 states. [2018-11-28 10:33:41,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:41,618 INFO L93 Difference]: Finished difference Result 73 states and 95 transitions. [2018-11-28 10:33:41,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 10:33:41,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2018-11-28 10:33:41,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:41,619 INFO L225 Difference]: With dead ends: 73 [2018-11-28 10:33:41,619 INFO L226 Difference]: Without dead ends: 72 [2018-11-28 10:33:41,620 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 10:33:41,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-28 10:33:41,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2018-11-28 10:33:41,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-11-28 10:33:41,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2018-11-28 10:33:41,626 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 15 [2018-11-28 10:33:41,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:41,626 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2018-11-28 10:33:41,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 10:33:41,627 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2018-11-28 10:33:41,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-28 10:33:41,627 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:41,627 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:41,628 INFO L423 AbstractCegarLoop]: === Iteration 5 === [rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 10:33:41,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:41,628 INFO L82 PathProgramCache]: Analyzing trace with hash -440899931, now seen corresponding path program 1 times [2018-11-28 10:33:41,628 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:41,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:41,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:41,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:41,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:41,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:33:41,651 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:41,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 10:33:41,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 10:33:41,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 10:33:41,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 10:33:41,652 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand 5 states. [2018-11-28 10:33:41,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:41,697 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2018-11-28 10:33:41,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 10:33:41,697 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-11-28 10:33:41,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:41,698 INFO L225 Difference]: With dead ends: 70 [2018-11-28 10:33:41,698 INFO L226 Difference]: Without dead ends: 69 [2018-11-28 10:33:41,699 INFO L631 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 [2018-11-28 10:33:41,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-28 10:33:41,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2018-11-28 10:33:41,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-11-28 10:33:41,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2018-11-28 10:33:41,706 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 20 [2018-11-28 10:33:41,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:41,706 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2018-11-28 10:33:41,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 10:33:41,706 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2018-11-28 10:33:41,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-28 10:33:41,707 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:41,707 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:41,707 INFO L423 AbstractCegarLoop]: === Iteration 6 === [rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 10:33:41,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:41,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1311878191, now seen corresponding path program 1 times [2018-11-28 10:33:41,708 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:41,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:41,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:41,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:41,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:41,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 10:33:41,727 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:41,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 10:33:41,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 10:33:41,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 10:33:41,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 10:33:41,728 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand 3 states. [2018-11-28 10:33:41,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:41,741 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2018-11-28 10:33:41,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 10:33:41,742 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2018-11-28 10:33:41,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:41,743 INFO L225 Difference]: With dead ends: 67 [2018-11-28 10:33:41,743 INFO L226 Difference]: Without dead ends: 66 [2018-11-28 10:33:41,743 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 10:33:41,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-28 10:33:41,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-11-28 10:33:41,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-28 10:33:41,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2018-11-28 10:33:41,750 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 22 [2018-11-28 10:33:41,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:41,750 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2018-11-28 10:33:41,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 10:33:41,751 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2018-11-28 10:33:41,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-28 10:33:41,751 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:41,751 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:41,751 INFO L423 AbstractCegarLoop]: === Iteration 7 === [rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 10:33:41,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:41,752 INFO L82 PathProgramCache]: Analyzing trace with hash -840361398, now seen corresponding path program 1 times [2018-11-28 10:33:41,752 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:41,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:41,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:41,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:41,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 10:33:41,774 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:41,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 10:33:41,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 10:33:41,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 10:33:41,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 10:33:41,775 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand 3 states. [2018-11-28 10:33:41,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:41,783 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2018-11-28 10:33:41,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 10:33:41,783 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2018-11-28 10:33:41,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:41,784 INFO L225 Difference]: With dead ends: 66 [2018-11-28 10:33:41,784 INFO L226 Difference]: Without dead ends: 65 [2018-11-28 10:33:41,784 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 10:33:41,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-11-28 10:33:41,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-11-28 10:33:41,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-11-28 10:33:41,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2018-11-28 10:33:41,790 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 23 [2018-11-28 10:33:41,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:41,791 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2018-11-28 10:33:41,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 10:33:41,791 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2018-11-28 10:33:41,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-28 10:33:41,792 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:41,792 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:41,792 INFO L423 AbstractCegarLoop]: === Iteration 8 === [rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 10:33:41,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:41,793 INFO L82 PathProgramCache]: Analyzing trace with hash -2013518212, now seen corresponding path program 1 times [2018-11-28 10:33:41,793 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:41,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:41,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:41,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:41,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 10:33:41,825 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:41,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 10:33:41,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 10:33:41,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 10:33:41,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 10:33:41,826 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 4 states. [2018-11-28 10:33:41,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:41,842 INFO L93 Difference]: Finished difference Result 90 states and 120 transitions. [2018-11-28 10:33:41,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 10:33:41,842 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2018-11-28 10:33:41,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:41,843 INFO L225 Difference]: With dead ends: 90 [2018-11-28 10:33:41,843 INFO L226 Difference]: Without dead ends: 89 [2018-11-28 10:33:41,843 INFO L631 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 [2018-11-28 10:33:41,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-11-28 10:33:41,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2018-11-28 10:33:41,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-28 10:33:41,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2018-11-28 10:33:41,849 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 23 [2018-11-28 10:33:41,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:41,850 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2018-11-28 10:33:41,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 10:33:41,850 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2018-11-28 10:33:41,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-28 10:33:41,850 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:41,850 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:41,851 INFO L423 AbstractCegarLoop]: === Iteration 9 === [rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 10:33:41,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:41,851 INFO L82 PathProgramCache]: Analyzing trace with hash -281399491, now seen corresponding path program 1 times [2018-11-28 10:33:41,851 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:41,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:41,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:41,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:41,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 10:33:41,865 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:41,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 10:33:41,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 10:33:41,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 10:33:41,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 10:33:41,866 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand 4 states. [2018-11-28 10:33:41,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:41,875 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2018-11-28 10:33:41,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 10:33:41,875 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2018-11-28 10:33:41,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:41,876 INFO L225 Difference]: With dead ends: 84 [2018-11-28 10:33:41,876 INFO L226 Difference]: Without dead ends: 80 [2018-11-28 10:33:41,876 INFO L631 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 [2018-11-28 10:33:41,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-11-28 10:33:41,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-11-28 10:33:41,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-11-28 10:33:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2018-11-28 10:33:41,882 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 24 [2018-11-28 10:33:41,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:41,882 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2018-11-28 10:33:41,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 10:33:41,882 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2018-11-28 10:33:41,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-28 10:33:41,883 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:41,883 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:41,883 INFO L423 AbstractCegarLoop]: === Iteration 10 === [rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 10:33:41,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:41,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1215449003, now seen corresponding path program 1 times [2018-11-28 10:33:41,884 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:41,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:41,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:41,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:41,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 10:33:41,917 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:41,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 10:33:41,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 10:33:41,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 10:33:41,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 10:33:41,918 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand 5 states. [2018-11-28 10:33:41,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:41,981 INFO L93 Difference]: Finished difference Result 105 states and 129 transitions. [2018-11-28 10:33:41,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 10:33:41,981 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-11-28 10:33:41,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:41,982 INFO L225 Difference]: With dead ends: 105 [2018-11-28 10:33:41,982 INFO L226 Difference]: Without dead ends: 104 [2018-11-28 10:33:41,982 INFO L631 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 [2018-11-28 10:33:41,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-11-28 10:33:41,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2018-11-28 10:33:41,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-11-28 10:33:41,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 128 transitions. [2018-11-28 10:33:41,991 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 128 transitions. Word has length 27 [2018-11-28 10:33:41,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:41,992 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 128 transitions. [2018-11-28 10:33:41,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 10:33:41,992 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 128 transitions. [2018-11-28 10:33:41,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-11-28 10:33:41,993 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:41,993 INFO L402 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:41,993 INFO L423 AbstractCegarLoop]: === Iteration 11 === [rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 10:33:41,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:41,994 INFO L82 PathProgramCache]: Analyzing trace with hash 505515198, now seen corresponding path program 1 times [2018-11-28 10:33:41,994 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:41,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:41,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:41,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:41,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:42,026 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-28 10:33:42,027 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:42,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 10:33:42,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 10:33:42,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 10:33:42,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 10:33:42,028 INFO L87 Difference]: Start difference. First operand 101 states and 128 transitions. Second operand 5 states. [2018-11-28 10:33:42,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:42,091 INFO L93 Difference]: Finished difference Result 104 states and 128 transitions. [2018-11-28 10:33:42,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 10:33:42,092 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2018-11-28 10:33:42,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:42,093 INFO L225 Difference]: With dead ends: 104 [2018-11-28 10:33:42,094 INFO L226 Difference]: Without dead ends: 103 [2018-11-28 10:33:42,094 INFO L631 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 [2018-11-28 10:33:42,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-11-28 10:33:42,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2018-11-28 10:33:42,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-11-28 10:33:42,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 127 transitions. [2018-11-28 10:33:42,104 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 127 transitions. Word has length 38 [2018-11-28 10:33:42,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:42,104 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 127 transitions. [2018-11-28 10:33:42,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 10:33:42,105 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 127 transitions. [2018-11-28 10:33:42,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-28 10:33:42,107 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:42,107 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:42,108 INFO L423 AbstractCegarLoop]: === Iteration 12 === [rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 10:33:42,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:42,108 INFO L82 PathProgramCache]: Analyzing trace with hash -30814145, now seen corresponding path program 1 times [2018-11-28 10:33:42,108 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:42,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:42,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:42,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:42,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:42,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-28 10:33:42,154 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:42,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 10:33:42,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 10:33:42,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 10:33:42,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 10:33:42,155 INFO L87 Difference]: Start difference. First operand 100 states and 127 transitions. Second operand 4 states. [2018-11-28 10:33:42,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:42,185 INFO L93 Difference]: Finished difference Result 110 states and 142 transitions. [2018-11-28 10:33:42,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 10:33:42,186 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2018-11-28 10:33:42,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:42,188 INFO L225 Difference]: With dead ends: 110 [2018-11-28 10:33:42,188 INFO L226 Difference]: Without dead ends: 109 [2018-11-28 10:33:42,188 INFO L631 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 [2018-11-28 10:33:42,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-11-28 10:33:42,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2018-11-28 10:33:42,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-11-28 10:33:42,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 133 transitions. [2018-11-28 10:33:42,199 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 133 transitions. Word has length 36 [2018-11-28 10:33:42,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:42,199 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 133 transitions. [2018-11-28 10:33:42,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 10:33:42,200 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 133 transitions. [2018-11-28 10:33:42,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-28 10:33:42,201 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:42,201 INFO L402 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:42,201 INFO L423 AbstractCegarLoop]: === Iteration 13 === [rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 10:33:42,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:42,201 INFO L82 PathProgramCache]: Analyzing trace with hash -464316786, now seen corresponding path program 1 times [2018-11-28 10:33:42,202 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:42,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:42,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:42,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:42,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:42,225 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2018-11-28 10:33:42,226 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:42,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 10:33:42,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 10:33:42,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 10:33:42,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 10:33:42,227 INFO L87 Difference]: Start difference. First operand 106 states and 133 transitions. Second operand 3 states. [2018-11-28 10:33:42,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:42,239 INFO L93 Difference]: Finished difference Result 106 states and 133 transitions. [2018-11-28 10:33:42,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 10:33:42,239 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2018-11-28 10:33:42,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:42,240 INFO L225 Difference]: With dead ends: 106 [2018-11-28 10:33:42,240 INFO L226 Difference]: Without dead ends: 105 [2018-11-28 10:33:42,240 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 10:33:42,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-11-28 10:33:42,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-11-28 10:33:42,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-11-28 10:33:42,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 130 transitions. [2018-11-28 10:33:42,248 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 130 transitions. Word has length 42 [2018-11-28 10:33:42,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:42,248 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 130 transitions. [2018-11-28 10:33:42,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 10:33:42,248 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 130 transitions. [2018-11-28 10:33:42,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-28 10:33:42,249 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:42,249 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:42,252 INFO L423 AbstractCegarLoop]: === Iteration 14 === [rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 10:33:42,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:42,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1915961670, now seen corresponding path program 1 times [2018-11-28 10:33:42,252 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:42,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:42,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:42,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:42,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-28 10:33:42,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 10:33:42,338 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41cd626f-0736-4f08-81bc-049e1e7d338a/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 10:33:42,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:42,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:42,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:33:42,390 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-28 10:33:42,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 10:33:42,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-28 10:33:42,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 10:33:42,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 10:33:42,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-28 10:33:42,406 INFO L87 Difference]: Start difference. First operand 105 states and 130 transitions. Second operand 6 states. [2018-11-28 10:33:42,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:42,461 INFO L93 Difference]: Finished difference Result 121 states and 152 transitions. [2018-11-28 10:33:42,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 10:33:42,462 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2018-11-28 10:33:42,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:42,463 INFO L225 Difference]: With dead ends: 121 [2018-11-28 10:33:42,463 INFO L226 Difference]: Without dead ends: 112 [2018-11-28 10:33:42,464 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-28 10:33:42,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-11-28 10:33:42,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2018-11-28 10:33:42,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-11-28 10:33:42,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2018-11-28 10:33:42,474 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 40 [2018-11-28 10:33:42,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:42,475 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2018-11-28 10:33:42,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 10:33:42,475 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2018-11-28 10:33:42,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-28 10:33:42,476 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:42,476 INFO L402 BasicCegarLoop]: trace histogram [6, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:42,477 INFO L423 AbstractCegarLoop]: === Iteration 15 === [rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 10:33:42,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:42,477 INFO L82 PathProgramCache]: Analyzing trace with hash 541352037, now seen corresponding path program 1 times [2018-11-28 10:33:42,477 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:42,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:42,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:42,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:42,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-11-28 10:33:42,513 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:42,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 10:33:42,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 10:33:42,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 10:33:42,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 10:33:42,514 INFO L87 Difference]: Start difference. First operand 109 states and 135 transitions. Second operand 5 states. [2018-11-28 10:33:42,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:42,556 INFO L93 Difference]: Finished difference Result 109 states and 135 transitions. [2018-11-28 10:33:42,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 10:33:42,557 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2018-11-28 10:33:42,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:42,559 INFO L225 Difference]: With dead ends: 109 [2018-11-28 10:33:42,559 INFO L226 Difference]: Without dead ends: 108 [2018-11-28 10:33:42,559 INFO L631 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 [2018-11-28 10:33:42,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-11-28 10:33:42,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 97. [2018-11-28 10:33:42,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-11-28 10:33:42,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2018-11-28 10:33:42,567 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 58 [2018-11-28 10:33:42,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:42,567 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2018-11-28 10:33:42,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 10:33:42,568 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2018-11-28 10:33:42,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-11-28 10:33:42,569 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:42,569 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 8, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:42,570 INFO L423 AbstractCegarLoop]: === Iteration 16 === [rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 10:33:42,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:42,570 INFO L82 PathProgramCache]: Analyzing trace with hash 705211226, now seen corresponding path program 1 times [2018-11-28 10:33:42,570 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:42,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:42,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:42,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:42,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:42,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:42,649 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 19 proven. 38 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2018-11-28 10:33:42,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 10:33:42,649 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41cd626f-0736-4f08-81bc-049e1e7d338a/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 10:33:42,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:42,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:33:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2018-11-28 10:33:42,711 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-28 10:33:42,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2018-11-28 10:33:42,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 10:33:42,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 10:33:42,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-28 10:33:42,712 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand 6 states. [2018-11-28 10:33:42,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:42,743 INFO L93 Difference]: Finished difference Result 185 states and 227 transitions. [2018-11-28 10:33:42,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 10:33:42,743 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 110 [2018-11-28 10:33:42,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:42,744 INFO L225 Difference]: With dead ends: 185 [2018-11-28 10:33:42,744 INFO L226 Difference]: Without dead ends: 104 [2018-11-28 10:33:42,745 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-28 10:33:42,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-11-28 10:33:42,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2018-11-28 10:33:42,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-11-28 10:33:42,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2018-11-28 10:33:42,751 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 110 [2018-11-28 10:33:42,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:42,751 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2018-11-28 10:33:42,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 10:33:42,751 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2018-11-28 10:33:42,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-11-28 10:33:42,753 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:42,753 INFO L402 BasicCegarLoop]: trace histogram [11, 10, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:42,753 INFO L423 AbstractCegarLoop]: === Iteration 17 === [rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 10:33:42,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:42,754 INFO L82 PathProgramCache]: Analyzing trace with hash 814042608, now seen corresponding path program 1 times [2018-11-28 10:33:42,754 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:42,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:42,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:42,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:42,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 58 proven. 13 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2018-11-28 10:33:42,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 10:33:42,814 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41cd626f-0736-4f08-81bc-049e1e7d338a/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 10:33:42,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:42,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:33:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-28 10:33:42,982 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 10:33:42,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 13 [2018-11-28 10:33:42,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 10:33:42,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 10:33:42,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2018-11-28 10:33:42,983 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand 13 states. [2018-11-28 10:33:43,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:43,240 INFO L93 Difference]: Finished difference Result 249 states and 323 transitions. [2018-11-28 10:33:43,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-28 10:33:43,241 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 95 [2018-11-28 10:33:43,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:43,242 INFO L225 Difference]: With dead ends: 249 [2018-11-28 10:33:43,242 INFO L226 Difference]: Without dead ends: 161 [2018-11-28 10:33:43,243 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2018-11-28 10:33:43,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-11-28 10:33:43,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 136. [2018-11-28 10:33:43,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-11-28 10:33:43,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 165 transitions. [2018-11-28 10:33:43,253 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 165 transitions. Word has length 95 [2018-11-28 10:33:43,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:43,253 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 165 transitions. [2018-11-28 10:33:43,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 10:33:43,253 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 165 transitions. [2018-11-28 10:33:43,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-11-28 10:33:43,255 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:43,255 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:43,255 INFO L423 AbstractCegarLoop]: === Iteration 18 === [rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 10:33:43,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:43,256 INFO L82 PathProgramCache]: Analyzing trace with hash 77369472, now seen corresponding path program 2 times [2018-11-28 10:33:43,256 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:43,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:43,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:43,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:43,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:43,295 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-11-28 10:33:43,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 10:33:43,295 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41cd626f-0736-4f08-81bc-049e1e7d338a/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 10:33:43,313 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 10:33:43,328 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 10:33:43,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 10:33:43,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:33:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-11-28 10:33:43,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 10:33:43,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-11-28 10:33:43,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 10:33:43,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 10:33:43,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 10:33:43,354 INFO L87 Difference]: Start difference. First operand 136 states and 165 transitions. Second operand 6 states. [2018-11-28 10:33:43,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:43,391 INFO L93 Difference]: Finished difference Result 145 states and 175 transitions. [2018-11-28 10:33:43,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 10:33:43,392 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2018-11-28 10:33:43,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:43,393 INFO L225 Difference]: With dead ends: 145 [2018-11-28 10:33:43,393 INFO L226 Difference]: Without dead ends: 139 [2018-11-28 10:33:43,395 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 10:33:43,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-11-28 10:33:43,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-11-28 10:33:43,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-11-28 10:33:43,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 166 transitions. [2018-11-28 10:33:43,406 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 166 transitions. Word has length 64 [2018-11-28 10:33:43,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:43,407 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 166 transitions. [2018-11-28 10:33:43,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 10:33:43,407 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 166 transitions. [2018-11-28 10:33:43,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-11-28 10:33:43,408 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:43,408 INFO L402 BasicCegarLoop]: trace histogram [13, 10, 8, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:43,408 INFO L423 AbstractCegarLoop]: === Iteration 19 === [rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 10:33:43,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:43,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1748165720, now seen corresponding path program 1 times [2018-11-28 10:33:43,409 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:43,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:43,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:43,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 10:33:43,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:43,464 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 26 proven. 84 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2018-11-28 10:33:43,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 10:33:43,465 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41cd626f-0736-4f08-81bc-049e1e7d338a/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 10:33:43,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:43,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:33:43,507 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2018-11-28 10:33:43,532 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-28 10:33:43,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2018-11-28 10:33:43,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 10:33:43,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 10:33:43,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-28 10:33:43,533 INFO L87 Difference]: Start difference. First operand 139 states and 166 transitions. Second operand 6 states. [2018-11-28 10:33:43,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:43,598 INFO L93 Difference]: Finished difference Result 298 states and 376 transitions. [2018-11-28 10:33:43,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 10:33:43,599 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 102 [2018-11-28 10:33:43,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:43,600 INFO L225 Difference]: With dead ends: 298 [2018-11-28 10:33:43,600 INFO L226 Difference]: Without dead ends: 170 [2018-11-28 10:33:43,601 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-28 10:33:43,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-11-28 10:33:43,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 155. [2018-11-28 10:33:43,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-11-28 10:33:43,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 184 transitions. [2018-11-28 10:33:43,610 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 184 transitions. Word has length 102 [2018-11-28 10:33:43,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:43,610 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 184 transitions. [2018-11-28 10:33:43,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 10:33:43,610 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 184 transitions. [2018-11-28 10:33:43,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-11-28 10:33:43,611 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:43,611 INFO L402 BasicCegarLoop]: trace histogram [13, 12, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:43,611 INFO L423 AbstractCegarLoop]: === Iteration 20 === [rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 10:33:43,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:43,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1524494125, now seen corresponding path program 2 times [2018-11-28 10:33:43,612 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:43,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:43,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:43,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:43,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 49 proven. 77 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2018-11-28 10:33:43,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 10:33:43,678 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41cd626f-0736-4f08-81bc-049e1e7d338a/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 10:33:43,686 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 10:33:43,709 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 10:33:43,709 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 10:33:43,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:33:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 214 proven. 28 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2018-11-28 10:33:43,755 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 10:33:43,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-28 10:33:43,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 10:33:43,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 10:33:43,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-11-28 10:33:43,756 INFO L87 Difference]: Start difference. First operand 155 states and 184 transitions. Second operand 8 states. [2018-11-28 10:33:43,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:43,855 INFO L93 Difference]: Finished difference Result 207 states and 249 transitions. [2018-11-28 10:33:43,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 10:33:43,857 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 108 [2018-11-28 10:33:43,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:43,857 INFO L225 Difference]: With dead ends: 207 [2018-11-28 10:33:43,857 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 10:33:43,858 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-11-28 10:33:43,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 10:33:43,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 10:33:43,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 10:33:43,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 10:33:43,859 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 108 [2018-11-28 10:33:43,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:43,859 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 10:33:43,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 10:33:43,859 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 10:33:43,859 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 10:33:43,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-28 10:33:43,940 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 10:33:43,947 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 10:33:44,194 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-28 10:33:44,194 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-28 10:33:44,194 INFO L448 ceAbstractionStarter]: For program point rec1FINAL(lines 11 15) no Hoare annotation was computed. [2018-11-28 10:33:44,195 INFO L448 ceAbstractionStarter]: For program point rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2018-11-28 10:33:44,195 INFO L448 ceAbstractionStarter]: For program point rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2018-11-28 10:33:44,195 INFO L448 ceAbstractionStarter]: For program point rec1EXIT(lines 11 15) no Hoare annotation was computed. [2018-11-28 10:33:44,195 INFO L448 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-11-28 10:33:44,195 INFO L451 ceAbstractionStarter]: At program point rec1ENTRY(lines 11 15) the Hoare annotation is: true [2018-11-28 10:33:44,195 INFO L448 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2018-11-28 10:33:44,195 INFO L448 ceAbstractionStarter]: For program point L12(lines 12 13) no Hoare annotation was computed. [2018-11-28 10:33:44,195 INFO L444 ceAbstractionStarter]: At program point L14-2(line 14) the Hoare annotation is: (or (< 2147483647 |rec1_#in~i|) (and (<= rec1_~i |rec1_#in~i|) (<= 1 rec1_~i))) [2018-11-28 10:33:44,195 INFO L448 ceAbstractionStarter]: For program point L14-3(line 14) no Hoare annotation was computed. [2018-11-28 10:33:44,195 INFO L448 ceAbstractionStarter]: For program point L14-4(line 14) no Hoare annotation was computed. [2018-11-28 10:33:44,196 INFO L448 ceAbstractionStarter]: For program point L14-5(line 14) no Hoare annotation was computed. [2018-11-28 10:33:44,196 INFO L444 ceAbstractionStarter]: At program point L14-6(line 14) the Hoare annotation is: (or (and (<= 0 (+ |rec1_#t~ret0| 2147483647)) (<= rec1_~i |rec1_#in~i|) (<= |rec1_#t~ret0| 1) (<= 1 rec1_~i)) (< 2147483647 |rec1_#in~i|)) [2018-11-28 10:33:44,196 INFO L448 ceAbstractionStarter]: For program point rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2018-11-28 10:33:44,196 INFO L448 ceAbstractionStarter]: For program point L14-7(line 14) no Hoare annotation was computed. [2018-11-28 10:33:44,196 INFO L448 ceAbstractionStarter]: For program point rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2018-11-28 10:33:44,196 INFO L448 ceAbstractionStarter]: For program point rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2018-11-28 10:33:44,196 INFO L444 ceAbstractionStarter]: At program point L14-8(line 14) the Hoare annotation is: (or (< 2147483647 |rec1_#in~i|) (and (<= 0 (+ |rec1_#t~ret0| 2147483647)) (<= rec1_~i |rec1_#in~i|) (<= |rec1_#t~ret1| 0) (<= |rec1_#t~ret0| 1) (<= 1 rec1_~i))) [2018-11-28 10:33:44,196 INFO L448 ceAbstractionStarter]: For program point rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2018-11-28 10:33:44,196 INFO L448 ceAbstractionStarter]: For program point L14-9(line 14) no Hoare annotation was computed. [2018-11-28 10:33:44,196 INFO L448 ceAbstractionStarter]: For program point L14-10(line 14) no Hoare annotation was computed. [2018-11-28 10:33:44,197 INFO L448 ceAbstractionStarter]: For program point L14-11(line 14) no Hoare annotation was computed. [2018-11-28 10:33:44,197 INFO L448 ceAbstractionStarter]: For program point rec2FINAL(lines 17 21) no Hoare annotation was computed. [2018-11-28 10:33:44,197 INFO L448 ceAbstractionStarter]: For program point rec2EXIT(lines 17 21) no Hoare annotation was computed. [2018-11-28 10:33:44,197 INFO L448 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2018-11-28 10:33:44,197 INFO L448 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-11-28 10:33:44,197 INFO L448 ceAbstractionStarter]: For program point L18(lines 18 19) no Hoare annotation was computed. [2018-11-28 10:33:44,197 INFO L448 ceAbstractionStarter]: For program point rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-28 10:33:44,197 INFO L444 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (or (and (<= rec2_~j |rec2_#in~j|) (<= 1 rec2_~j)) (< 2147483647 |rec2_#in~j|)) [2018-11-28 10:33:44,197 INFO L448 ceAbstractionStarter]: For program point rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-28 10:33:44,197 INFO L448 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2018-11-28 10:33:44,197 INFO L444 ceAbstractionStarter]: At program point L20-4(line 20) the Hoare annotation is: (and (or (and (<= rec2_~j |rec2_#in~j|) (<= |rec2_#t~ret3| 1) (<= 1 rec2_~j)) (< 2147483647 |rec2_#in~j|)) (or (<= |rec2_#t~ret3| 0) (< 1 |rec2_#in~j|))) [2018-11-28 10:33:44,198 INFO L448 ceAbstractionStarter]: For program point L20-5(line 20) no Hoare annotation was computed. [2018-11-28 10:33:44,205 INFO L448 ceAbstractionStarter]: For program point L20-6(line 20) no Hoare annotation was computed. [2018-11-28 10:33:44,205 INFO L448 ceAbstractionStarter]: For program point L20-7(line 20) no Hoare annotation was computed. [2018-11-28 10:33:44,205 INFO L451 ceAbstractionStarter]: At program point rec2ENTRY(lines 17 21) the Hoare annotation is: true [2018-11-28 10:33:44,205 INFO L448 ceAbstractionStarter]: For program point rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-28 10:33:44,205 INFO L448 ceAbstractionStarter]: For program point rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-28 10:33:44,205 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-28 10:33:44,205 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-28 10:33:44,205 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-28 10:33:44,205 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-28 10:33:44,205 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 23 26) the Hoare annotation is: true [2018-11-28 10:33:44,206 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 23 26) no Hoare annotation was computed. [2018-11-28 10:33:44,206 INFO L444 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (<= main_~x~0 2147483647) [2018-11-28 10:33:44,206 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 23 26) no Hoare annotation was computed. [2018-11-28 10:33:44,206 INFO L448 ceAbstractionStarter]: For program point L25-1(line 25) no Hoare annotation was computed. [2018-11-28 10:33:44,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 10:33:44 BoogieIcfgContainer [2018-11-28 10:33:44,208 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 10:33:44,209 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 10:33:44,209 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 10:33:44,209 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 10:33:44,209 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 10:33:41" (3/4) ... [2018-11-28 10:33:44,212 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 10:33:44,217 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-28 10:33:44,217 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure rec1 [2018-11-28 10:33:44,217 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure rec2 [2018-11-28 10:33:44,217 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-28 10:33:44,221 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2018-11-28 10:33:44,221 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-28 10:33:44,221 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 10:33:44,255 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_41cd626f-0736-4f08-81bc-049e1e7d338a/bin-2019/uautomizer/witness.graphml [2018-11-28 10:33:44,255 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 10:33:44,255 INFO L168 Benchmark]: Toolchain (without parser) took 3571.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 186.1 MB). Free memory was 958.0 MB in the beginning and 871.8 MB in the end (delta: 86.2 MB). Peak memory consumption was 272.3 MB. Max. memory is 11.5 GB. [2018-11-28 10:33:44,256 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 984.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 10:33:44,256 INFO L168 Benchmark]: CACSL2BoogieTranslator took 146.98 ms. Allocated memory is still 1.0 GB. Free memory was 958.0 MB in the beginning and 947.1 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2018-11-28 10:33:44,256 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.35 ms. Allocated memory is still 1.0 GB. Free memory is still 947.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 10:33:44,257 INFO L168 Benchmark]: Boogie Preprocessor took 11.58 ms. Allocated memory is still 1.0 GB. Free memory is still 947.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 10:33:44,257 INFO L168 Benchmark]: RCFGBuilder took 216.19 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.0 MB). Free memory was 947.1 MB in the beginning and 1.1 GB in the end (delta: -139.9 MB). Peak memory consumption was 15.5 MB. Max. memory is 11.5 GB. [2018-11-28 10:33:44,257 INFO L168 Benchmark]: TraceAbstraction took 3135.01 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 78.1 MB). Free memory was 1.1 GB in the beginning and 871.8 MB in the end (delta: 215.3 MB). Peak memory consumption was 293.4 MB. Max. memory is 11.5 GB. [2018-11-28 10:33:44,257 INFO L168 Benchmark]: Witness Printer took 46.08 ms. Allocated memory is still 1.2 GB. Free memory is still 871.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 10:33:44,259 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 984.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 146.98 ms. Allocated memory is still 1.0 GB. Free memory was 958.0 MB in the beginning and 947.1 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.35 ms. Allocated memory is still 1.0 GB. Free memory is still 947.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.58 ms. Allocated memory is still 1.0 GB. Free memory is still 947.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 216.19 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.0 MB). Free memory was 947.1 MB in the beginning and 1.1 GB in the end (delta: -139.9 MB). Peak memory consumption was 15.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3135.01 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 78.1 MB). Free memory was 1.1 GB in the beginning and 871.8 MB in the end (delta: 215.3 MB). Peak memory consumption was 293.4 MB. Max. memory is 11.5 GB. * Witness Printer took 46.08 ms. Allocated memory is still 1.2 GB. Free memory is still 871.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 49 locations, 10 error locations. SAFE Result, 3.0s OverallTime, 20 OverallIterations, 13 TraceHistogramMax, 1.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 832 SDtfs, 308 SDslu, 2000 SDs, 0 SdLazy, 766 SolverSat, 92 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 630 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=155occurred in iteration=19, 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, 102 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 299 PreInvPairs, 322 NumberOfFragments, 100 HoareAnnotationTreeSize, 299 FomulaSimplifications, 717 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 12 FomulaSimplificationsInter, 525 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 1399 NumberOfCodeBlocks, 1399 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1373 ConstructedInterpolants, 0 QuantifiedInterpolants, 140993 SizeOfPredicates, 9 NumberOfNonLiveVariables, 1069 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 26 InterpolantComputations, 16 PerfectInterpolantSequences, 2355/2617 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...