./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector-loops/verisec_sendmail__tTflag_arr_one_loop_false-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector-loops/verisec_sendmail__tTflag_arr_one_loop_false-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eda42c9201fdedd9f50669e53ef2af5b1d7cb675 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 08:08:51,985 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 08:08:51,985 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 08:08:51,991 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 08:08:51,992 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 08:08:51,992 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 08:08:51,993 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 08:08:51,993 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 08:08:51,994 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 08:08:51,995 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 08:08:51,995 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 08:08:51,995 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 08:08:51,996 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 08:08:51,996 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 08:08:51,997 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 08:08:51,997 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 08:08:51,997 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 08:08:51,998 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 08:08:51,999 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 08:08:52,000 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 08:08:52,000 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 08:08:52,001 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 08:08:52,002 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 08:08:52,002 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 08:08:52,002 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 08:08:52,002 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 08:08:52,003 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 08:08:52,003 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 08:08:52,004 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 08:08:52,004 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 08:08:52,004 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 08:08:52,005 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 08:08:52,005 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 08:08:52,005 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 08:08:52,005 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 08:08:52,006 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 08:08:52,006 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-08 08:08:52,013 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 08:08:52,013 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 08:08:52,013 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 08:08:52,013 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 08:08:52,014 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-08 08:08:52,014 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-08 08:08:52,014 INFO L133 SettingsManager]: * Use SBE=true [2018-12-08 08:08:52,014 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 08:08:52,014 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 08:08:52,014 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 08:08:52,014 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 08:08:52,014 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 08:08:52,014 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 08:08:52,015 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 08:08:52,015 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 08:08:52,015 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 08:08:52,015 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 08:08:52,015 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-08 08:08:52,015 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 08:08:52,015 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 08:08:52,015 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 08:08:52,015 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 08:08:52,015 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 08:08:52,015 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 08:08:52,016 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 08:08:52,016 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 08:08:52,016 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 08:08:52,016 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-08 08:08:52,016 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 08:08:52,016 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 08:08:52,016 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_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/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 ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eda42c9201fdedd9f50669e53ef2af5b1d7cb675 [2018-12-08 08:08:52,033 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 08:08:52,041 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 08:08:52,044 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 08:08:52,045 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 08:08:52,045 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 08:08:52,045 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/../../sv-benchmarks/c/bitvector-loops/verisec_sendmail__tTflag_arr_one_loop_false-unreach-call_true-termination.i [2018-12-08 08:08:52,082 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/data/e855abba9/b0cc8e373beb4465945a8fe067baa3a4/FLAGdf969e704 [2018-12-08 08:08:52,497 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 08:08:52,497 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/sv-benchmarks/c/bitvector-loops/verisec_sendmail__tTflag_arr_one_loop_false-unreach-call_true-termination.i [2018-12-08 08:08:52,501 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/data/e855abba9/b0cc8e373beb4465945a8fe067baa3a4/FLAGdf969e704 [2018-12-08 08:08:52,510 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/data/e855abba9/b0cc8e373beb4465945a8fe067baa3a4 [2018-12-08 08:08:52,512 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 08:08:52,513 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 08:08:52,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 08:08:52,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 08:08:52,516 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 08:08:52,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 08:08:52" (1/1) ... [2018-12-08 08:08:52,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ec9f2fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:08:52, skipping insertion in model container [2018-12-08 08:08:52,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 08:08:52" (1/1) ... [2018-12-08 08:08:52,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 08:08:52,532 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 08:08:52,634 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 08:08:52,636 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 08:08:52,650 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 08:08:52,663 INFO L195 MainTranslator]: Completed translation [2018-12-08 08:08:52,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:08:52 WrapperNode [2018-12-08 08:08:52,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 08:08:52,664 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 08:08:52,664 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 08:08:52,664 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 08:08:52,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:08:52" (1/1) ... [2018-12-08 08:08:52,674 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:08:52" (1/1) ... [2018-12-08 08:08:52,678 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 08:08:52,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 08:08:52,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 08:08:52,679 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 08:08:52,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:08:52" (1/1) ... [2018-12-08 08:08:52,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:08:52" (1/1) ... [2018-12-08 08:08:52,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:08:52" (1/1) ... [2018-12-08 08:08:52,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:08:52" (1/1) ... [2018-12-08 08:08:52,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:08:52" (1/1) ... [2018-12-08 08:08:52,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:08:52" (1/1) ... [2018-12-08 08:08:52,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:08:52" (1/1) ... [2018-12-08 08:08:52,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 08:08:52,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 08:08:52,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 08:08:52,724 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 08:08:52,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:08:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 08:08:52,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-08 08:08:52,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 08:08:52,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 08:08:52,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-08 08:08:52,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 08:08:52,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 08:08:52,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-08 08:08:52,755 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 08:08:52,755 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 08:08:52,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-08 08:08:52,756 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-08 08:08:52,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-08 08:08:52,853 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 08:08:52,853 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-08 08:08:52,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 08:08:52 BoogieIcfgContainer [2018-12-08 08:08:52,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 08:08:52,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 08:08:52,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 08:08:52,856 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 08:08:52,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 08:08:52" (1/3) ... [2018-12-08 08:08:52,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c505462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 08:08:52, skipping insertion in model container [2018-12-08 08:08:52,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:08:52" (2/3) ... [2018-12-08 08:08:52,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c505462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 08:08:52, skipping insertion in model container [2018-12-08 08:08:52,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 08:08:52" (3/3) ... [2018-12-08 08:08:52,858 INFO L112 eAbstractionObserver]: Analyzing ICFG verisec_sendmail__tTflag_arr_one_loop_false-unreach-call_true-termination.i [2018-12-08 08:08:52,864 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 08:08:52,868 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-08 08:08:52,877 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-08 08:08:52,893 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-08 08:08:52,893 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 08:08:52,893 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 08:08:52,893 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 08:08:52,893 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 08:08:52,893 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 08:08:52,894 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 08:08:52,894 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 08:08:52,894 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 08:08:52,903 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-12-08 08:08:52,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-08 08:08:52,908 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:08:52,908 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:08:52,909 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:08:52,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:08:52,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1522547275, now seen corresponding path program 1 times [2018-12-08 08:08:52,914 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:08:52,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:08:52,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:08:52,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:08:52,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:08:52,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:08:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 08:08:52,984 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 08:08:52,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-08 08:08:52,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-08 08:08:52,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-08 08:08:52,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-08 08:08:52,995 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2018-12-08 08:08:53,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:08:53,006 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2018-12-08 08:08:53,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-08 08:08:53,007 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2018-12-08 08:08:53,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:08:53,012 INFO L225 Difference]: With dead ends: 36 [2018-12-08 08:08:53,012 INFO L226 Difference]: Without dead ends: 15 [2018-12-08 08:08:53,014 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-08 08:08:53,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-12-08 08:08:53,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-12-08 08:08:53,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-08 08:08:53,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-12-08 08:08:53,033 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-12-08 08:08:53,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:08:53,034 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-12-08 08:08:53,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-08 08:08:53,034 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-12-08 08:08:53,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-08 08:08:53,034 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:08:53,035 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:08:53,035 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:08:53,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:08:53,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1742365231, now seen corresponding path program 1 times [2018-12-08 08:08:53,035 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:08:53,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:08:53,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:08:53,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:08:53,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:08:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:08:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 08:08:53,068 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 08:08:53,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-08 08:08:53,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-08 08:08:53,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-08 08:08:53,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 08:08:53,069 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 3 states. [2018-12-08 08:08:53,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:08:53,091 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2018-12-08 08:08:53,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-08 08:08:53,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-12-08 08:08:53,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:08:53,093 INFO L225 Difference]: With dead ends: 26 [2018-12-08 08:08:53,093 INFO L226 Difference]: Without dead ends: 19 [2018-12-08 08:08:53,094 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 08:08:53,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-12-08 08:08:53,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2018-12-08 08:08:53,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-08 08:08:53,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-12-08 08:08:53,097 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2018-12-08 08:08:53,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:08:53,097 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-12-08 08:08:53,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-08 08:08:53,097 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-12-08 08:08:53,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-08 08:08:53,097 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:08:53,098 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:08:53,098 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:08:53,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:08:53,098 INFO L82 PathProgramCache]: Analyzing trace with hash 351378381, now seen corresponding path program 1 times [2018-12-08 08:08:53,098 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:08:53,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:08:53,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:08:53,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:08:53,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:08:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:08:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 08:08:53,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:08:53,128 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:08:53,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:08:53,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:08:53,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:08:53,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 08:08:53,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 08:08:53,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-12-08 08:08:53,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 08:08:53,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 08:08:53,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-12-08 08:08:53,183 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2018-12-08 08:08:53,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:08:53,200 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2018-12-08 08:08:53,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-08 08:08:53,200 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-12-08 08:08:53,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:08:53,201 INFO L225 Difference]: With dead ends: 28 [2018-12-08 08:08:53,201 INFO L226 Difference]: Without dead ends: 21 [2018-12-08 08:08:53,201 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-12-08 08:08:53,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-08 08:08:53,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-12-08 08:08:53,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-08 08:08:53,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-12-08 08:08:53,203 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2018-12-08 08:08:53,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:08:53,204 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-12-08 08:08:53,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 08:08:53,204 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-12-08 08:08:53,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-08 08:08:53,204 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:08:53,204 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:08:53,204 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:08:53,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:08:53,205 INFO L82 PathProgramCache]: Analyzing trace with hash -652155413, now seen corresponding path program 2 times [2018-12-08 08:08:53,205 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:08:53,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:08:53,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:08:53,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:08:53,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:08:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:08:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 08:08:53,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:08:53,239 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:08:53,245 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 08:08:53,256 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-12-08 08:08:53,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 08:08:53,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:08:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-08 08:08:53,297 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-08 08:08:53,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2018-12-08 08:08:53,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-08 08:08:53,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-08 08:08:53,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-12-08 08:08:53,298 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2018-12-08 08:08:53,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:08:53,352 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2018-12-08 08:08:53,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-08 08:08:53,352 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-12-08 08:08:53,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:08:53,353 INFO L225 Difference]: With dead ends: 34 [2018-12-08 08:08:53,353 INFO L226 Difference]: Without dead ends: 23 [2018-12-08 08:08:53,354 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-12-08 08:08:53,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-08 08:08:53,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2018-12-08 08:08:53,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-12-08 08:08:53,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-12-08 08:08:53,357 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2018-12-08 08:08:53,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:08:53,357 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-12-08 08:08:53,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-08 08:08:53,358 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-12-08 08:08:53,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-08 08:08:53,358 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:08:53,358 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:08:53,358 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:08:53,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:08:53,359 INFO L82 PathProgramCache]: Analyzing trace with hash -2123854327, now seen corresponding path program 1 times [2018-12-08 08:08:53,359 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:08:53,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:08:53,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:08:53,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:08:53,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:08:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:08:53,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-08 08:08:53,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:08:53,405 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:08:53,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:08:53,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:08:53,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:08:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-08 08:08:53,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 08:08:53,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-12-08 08:08:53,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-08 08:08:53,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-08 08:08:53,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-12-08 08:08:53,456 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states. [2018-12-08 08:08:53,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:08:53,474 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-12-08 08:08:53,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 08:08:53,474 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2018-12-08 08:08:53,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:08:53,475 INFO L225 Difference]: With dead ends: 34 [2018-12-08 08:08:53,475 INFO L226 Difference]: Without dead ends: 25 [2018-12-08 08:08:53,475 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-12-08 08:08:53,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-08 08:08:53,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2018-12-08 08:08:53,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-08 08:08:53,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-12-08 08:08:53,479 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2018-12-08 08:08:53,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:08:53,479 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-12-08 08:08:53,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-08 08:08:53,479 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-12-08 08:08:53,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-08 08:08:53,480 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:08:53,480 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:08:53,480 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:08:53,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:08:53,480 INFO L82 PathProgramCache]: Analyzing trace with hash -428652121, now seen corresponding path program 2 times [2018-12-08 08:08:53,480 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:08:53,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:08:53,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:08:53,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:08:53,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:08:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:08:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-08 08:08:53,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:08:53,519 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:08:53,525 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 08:08:53,538 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 08:08:53,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 08:08:53,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:08:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-08 08:08:53,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 08:08:53,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-12-08 08:08:53,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-08 08:08:53,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-08 08:08:53,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-08 08:08:53,565 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-12-08 08:08:53,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:08:53,585 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-12-08 08:08:53,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 08:08:53,586 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2018-12-08 08:08:53,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:08:53,586 INFO L225 Difference]: With dead ends: 36 [2018-12-08 08:08:53,586 INFO L226 Difference]: Without dead ends: 27 [2018-12-08 08:08:53,587 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-08 08:08:53,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-08 08:08:53,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-12-08 08:08:53,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-08 08:08:53,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-12-08 08:08:53,590 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2018-12-08 08:08:53,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:08:53,590 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-12-08 08:08:53,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-08 08:08:53,591 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-12-08 08:08:53,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-08 08:08:53,591 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:08:53,591 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:08:53,592 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:08:53,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:08:53,592 INFO L82 PathProgramCache]: Analyzing trace with hash 868062661, now seen corresponding path program 3 times [2018-12-08 08:08:53,592 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:08:53,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:08:53,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:08:53,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:08:53,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:08:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:08:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-08 08:08:53,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:08:53,652 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:08:53,660 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 08:08:53,690 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-08 08:08:53,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 08:08:53,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:08:53,834 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-12-08 08:08:53,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 08:08:53,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2018-12-08 08:08:53,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-08 08:08:53,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-08 08:08:53,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-12-08 08:08:53,849 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 12 states. [2018-12-08 08:08:54,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:08:54,032 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2018-12-08 08:08:54,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-08 08:08:54,032 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2018-12-08 08:08:54,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:08:54,032 INFO L225 Difference]: With dead ends: 44 [2018-12-08 08:08:54,032 INFO L226 Difference]: Without dead ends: 32 [2018-12-08 08:08:54,033 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2018-12-08 08:08:54,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-08 08:08:54,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-12-08 08:08:54,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-08 08:08:54,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-12-08 08:08:54,036 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 25 [2018-12-08 08:08:54,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:08:54,036 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-12-08 08:08:54,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-08 08:08:54,036 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-12-08 08:08:54,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-12-08 08:08:54,037 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:08:54,037 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:08:54,037 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:08:54,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:08:54,037 INFO L82 PathProgramCache]: Analyzing trace with hash -208022531, now seen corresponding path program 4 times [2018-12-08 08:08:54,037 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:08:54,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:08:54,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:08:54,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:08:54,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:08:54,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:08:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-08 08:08:54,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:08:54,093 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:08:54,099 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 08:08:54,115 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 08:08:54,116 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 08:08:54,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:08:54,126 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-08 08:08:54,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 08:08:54,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-12-08 08:08:54,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-08 08:08:54,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 08:08:54,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-08 08:08:54,152 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 11 states. [2018-12-08 08:08:54,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:08:54,177 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-12-08 08:08:54,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-08 08:08:54,178 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2018-12-08 08:08:54,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:08:54,178 INFO L225 Difference]: With dead ends: 44 [2018-12-08 08:08:54,179 INFO L226 Difference]: Without dead ends: 34 [2018-12-08 08:08:54,179 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-08 08:08:54,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-08 08:08:54,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-12-08 08:08:54,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-08 08:08:54,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-12-08 08:08:54,184 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-12-08 08:08:54,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:08:54,184 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-12-08 08:08:54,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-08 08:08:54,184 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-12-08 08:08:54,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-12-08 08:08:54,185 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:08:54,185 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:08:54,185 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:08:54,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:08:54,186 INFO L82 PathProgramCache]: Analyzing trace with hash 80038431, now seen corresponding path program 5 times [2018-12-08 08:08:54,186 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:08:54,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:08:54,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:08:54,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:08:54,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:08:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:08:54,282 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-08 08:08:54,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:08:54,282 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:08:54,288 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 08:08:54,316 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-12-08 08:08:54,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 08:08:54,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:08:54,325 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-08 08:08:54,339 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 08:08:54,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-12-08 08:08:54,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-08 08:08:54,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-08 08:08:54,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-08 08:08:54,340 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2018-12-08 08:08:54,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:08:54,390 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2018-12-08 08:08:54,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-08 08:08:54,390 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2018-12-08 08:08:54,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:08:54,392 INFO L225 Difference]: With dead ends: 46 [2018-12-08 08:08:54,392 INFO L226 Difference]: Without dead ends: 36 [2018-12-08 08:08:54,393 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-08 08:08:54,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-08 08:08:54,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-12-08 08:08:54,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-12-08 08:08:54,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-12-08 08:08:54,396 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-12-08 08:08:54,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:08:54,396 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-12-08 08:08:54,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-08 08:08:54,396 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-12-08 08:08:54,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-08 08:08:54,397 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:08:54,397 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:08:54,397 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:08:54,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:08:54,397 INFO L82 PathProgramCache]: Analyzing trace with hash 2028715969, now seen corresponding path program 6 times [2018-12-08 08:08:54,397 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:08:54,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:08:54,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:08:54,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:08:54,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:08:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:08:54,492 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-08 08:08:54,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:08:54,492 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:08:54,498 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 08:08:54,543 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-12-08 08:08:54,543 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 08:08:54,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:08:55,154 WARN L180 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2018-12-08 08:08:56,120 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-12-08 08:08:56,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 08:08:56,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2018-12-08 08:08:56,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-08 08:08:56,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-08 08:08:56,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2018-12-08 08:08:56,135 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 17 states. [2018-12-08 08:09:02,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:09:02,082 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2018-12-08 08:09:02,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-08 08:09:02,082 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2018-12-08 08:09:02,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:09:02,082 INFO L225 Difference]: With dead ends: 57 [2018-12-08 08:09:02,082 INFO L226 Difference]: Without dead ends: 44 [2018-12-08 08:09:02,083 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2018-12-08 08:09:02,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-12-08 08:09:02,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2018-12-08 08:09:02,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-12-08 08:09:02,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-12-08 08:09:02,087 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 34 [2018-12-08 08:09:02,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:09:02,087 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-12-08 08:09:02,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-08 08:09:02,087 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-12-08 08:09:02,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-08 08:09:02,088 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:09:02,088 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:09:02,088 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:09:02,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:09:02,088 INFO L82 PathProgramCache]: Analyzing trace with hash 775785179, now seen corresponding path program 7 times [2018-12-08 08:09:02,088 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:09:02,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:09:02,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:09:02,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:09:02,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:09:02,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:09:02,145 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-08 08:09:02,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:09:02,145 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:09:02,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:09:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:09:02,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:09:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-08 08:09:02,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 08:09:02,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-12-08 08:09:02,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-08 08:09:02,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-08 08:09:02,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-12-08 08:09:02,207 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 14 states. [2018-12-08 08:09:02,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:09:02,245 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-12-08 08:09:02,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-08 08:09:02,245 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2018-12-08 08:09:02,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:09:02,246 INFO L225 Difference]: With dead ends: 51 [2018-12-08 08:09:02,246 INFO L226 Difference]: Without dead ends: 40 [2018-12-08 08:09:02,246 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-12-08 08:09:02,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-12-08 08:09:02,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-12-08 08:09:02,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-12-08 08:09:02,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-12-08 08:09:02,251 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2018-12-08 08:09:02,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:09:02,251 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-12-08 08:09:02,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-08 08:09:02,251 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-12-08 08:09:02,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-08 08:09:02,252 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:09:02,252 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:09:02,252 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:09:02,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:09:02,252 INFO L82 PathProgramCache]: Analyzing trace with hash 491342457, now seen corresponding path program 8 times [2018-12-08 08:09:02,252 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:09:02,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:09:02,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:09:02,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:09:02,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:09:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:09:02,546 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-12-08 08:09:02,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:09:02,546 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:09:02,552 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 08:09:14,565 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 08:09:14,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [2018-12-08 08:09:14,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-12-08 08:09:14,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-12-08 08:09:14,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 08:09:14,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 08:09:14,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-12-08 08:09:14,594 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 9 states. [2018-12-08 08:09:14,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:09:14,627 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-12-08 08:09:14,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-08 08:09:14,627 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2018-12-08 08:09:14,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:09:14,627 INFO L225 Difference]: With dead ends: 46 [2018-12-08 08:09:14,627 INFO L226 Difference]: Without dead ends: 41 [2018-12-08 08:09:14,628 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-12-08 08:09:14,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-12-08 08:09:14,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-12-08 08:09:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-08 08:09:14,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-12-08 08:09:14,632 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 39 [2018-12-08 08:09:14,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:09:14,632 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-12-08 08:09:14,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 08:09:14,632 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-12-08 08:09:14,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-12-08 08:09:14,632 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:09:14,632 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:09:14,633 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:09:14,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:09:14,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1912715259, now seen corresponding path program 9 times [2018-12-08 08:09:14,633 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:09:14,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:09:14,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:09:14,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:09:14,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:09:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:09:16,716 WARN L180 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 25 [2018-12-08 08:09:16,742 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-12-08 08:09:16,742 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:09:16,742 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:09:16,748 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 08:11:08,201 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-12-08 08:11:08,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [2018-12-08 08:11:08,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-12-08 08:11:08,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-12-08 08:11:08,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-08 08:11:08,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-08 08:11:08,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-12-08 08:11:08,575 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 10 states. [2018-12-08 08:11:08,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:11:08,639 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2018-12-08 08:11:08,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-08 08:11:08,640 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-12-08 08:11:08,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:11:08,640 INFO L225 Difference]: With dead ends: 47 [2018-12-08 08:11:08,640 INFO L226 Difference]: Without dead ends: 42 [2018-12-08 08:11:08,640 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-12-08 08:11:08,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-08 08:11:08,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-12-08 08:11:08,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-08 08:11:08,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-12-08 08:11:08,646 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2018-12-08 08:11:08,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:11:08,646 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-12-08 08:11:08,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-08 08:11:08,646 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-12-08 08:11:08,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-08 08:11:08,647 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:11:08,647 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:11:08,647 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:11:08,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:11:08,647 INFO L82 PathProgramCache]: Analyzing trace with hash 870906873, now seen corresponding path program 10 times [2018-12-08 08:11:08,647 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:11:08,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:11:08,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:11:08,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:11:08,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:11:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:11:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-12-08 08:11:08,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:11:08,743 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:11:08,758 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 08:11:20,787 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 08:11:20,788 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [2018-12-08 08:11:20,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-12-08 08:11:20,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-12-08 08:11:20,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-08 08:11:20,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 08:11:20,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-12-08 08:11:20,835 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 11 states. [2018-12-08 08:11:20,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:11:20,871 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2018-12-08 08:11:20,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-08 08:11:20,871 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-12-08 08:11:20,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:11:20,871 INFO L225 Difference]: With dead ends: 48 [2018-12-08 08:11:20,871 INFO L226 Difference]: Without dead ends: 43 [2018-12-08 08:11:20,872 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2018-12-08 08:11:20,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-12-08 08:11:20,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-12-08 08:11:20,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-12-08 08:11:20,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-12-08 08:11:20,876 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 41 [2018-12-08 08:11:20,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:11:20,876 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-12-08 08:11:20,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-08 08:11:20,876 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-12-08 08:11:20,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-08 08:11:20,876 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:11:20,876 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:11:20,876 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:11:20,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:11:20,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1263847045, now seen corresponding path program 11 times [2018-12-08 08:11:20,877 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:11:20,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:11:20,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:11:20,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:11:20,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:11:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:11:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-12-08 08:11:20,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:11:20,993 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:11:21,001 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 08:11:33,137 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-12-08 08:11:33,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [2018-12-08 08:11:33,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-12-08 08:11:33,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-12-08 08:11:33,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-08 08:11:33,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-08 08:11:33,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-12-08 08:11:33,239 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 12 states. [2018-12-08 08:11:33,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:11:33,302 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-12-08 08:11:33,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-08 08:11:33,303 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2018-12-08 08:11:33,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:11:33,303 INFO L225 Difference]: With dead ends: 49 [2018-12-08 08:11:33,303 INFO L226 Difference]: Without dead ends: 44 [2018-12-08 08:11:33,303 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2018-12-08 08:11:33,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-12-08 08:11:33,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-12-08 08:11:33,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-08 08:11:33,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-12-08 08:11:33,307 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 42 [2018-12-08 08:11:33,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:11:33,307 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-12-08 08:11:33,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-08 08:11:33,307 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-12-08 08:11:33,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-08 08:11:33,308 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:11:33,308 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:11:33,308 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:11:33,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:11:33,308 INFO L82 PathProgramCache]: Analyzing trace with hash 560090489, now seen corresponding path program 12 times [2018-12-08 08:11:33,308 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:11:33,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:11:33,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:11:33,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:11:33,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:11:33,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:11:33,527 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-12-08 08:11:33,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:11:33,528 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:11:33,533 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 08:12:24,067 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-12-08 08:12:24,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [2018-12-08 08:12:25,172 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-12-08 08:12:25,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-12-08 08:12:25,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-08 08:12:25,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-08 08:12:25,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-12-08 08:12:25,173 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 13 states. [2018-12-08 08:12:25,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:12:25,235 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2018-12-08 08:12:25,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-08 08:12:25,235 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2018-12-08 08:12:25,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:12:25,235 INFO L225 Difference]: With dead ends: 50 [2018-12-08 08:12:25,235 INFO L226 Difference]: Without dead ends: 45 [2018-12-08 08:12:25,236 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2018-12-08 08:12:25,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-12-08 08:12:25,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-12-08 08:12:25,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-12-08 08:12:25,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-12-08 08:12:25,240 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 43 [2018-12-08 08:12:25,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:12:25,240 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-12-08 08:12:25,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-08 08:12:25,240 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-12-08 08:12:25,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-12-08 08:12:25,240 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:12:25,240 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:12:25,240 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:12:25,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:12:25,240 INFO L82 PathProgramCache]: Analyzing trace with hash 218473733, now seen corresponding path program 13 times [2018-12-08 08:12:25,240 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:12:25,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:12:25,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:12:25,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:12:25,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:12:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:12:25,368 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-12-08 08:12:25,369 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:12:25,369 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:12:25,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:12:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2018-12-08 08:12:37,568 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-12-08 08:12:37,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-12-08 08:12:37,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-08 08:12:37,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-08 08:12:37,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-12-08 08:12:37,568 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 14 states. [2018-12-08 08:12:37,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:12:37,647 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-12-08 08:12:37,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-08 08:12:37,647 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2018-12-08 08:12:37,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:12:37,648 INFO L225 Difference]: With dead ends: 51 [2018-12-08 08:12:37,648 INFO L226 Difference]: Without dead ends: 46 [2018-12-08 08:12:37,648 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2018-12-08 08:12:37,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-12-08 08:12:37,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-12-08 08:12:37,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-12-08 08:12:37,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-12-08 08:12:37,652 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2018-12-08 08:12:37,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:12:37,652 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-12-08 08:12:37,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-08 08:12:37,652 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-12-08 08:12:37,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-08 08:12:37,652 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:12:37,652 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:12:37,652 INFO L423 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:12:37,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:12:37,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1781711111, now seen corresponding path program 14 times [2018-12-08 08:12:37,653 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:12:37,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:12:37,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:12:37,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:12:37,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:12:37,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:12:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:12:38,704 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-08 08:12:38,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 08:12:38 BoogieIcfgContainer [2018-12-08 08:12:38,725 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 08:12:38,726 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 08:12:38,726 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 08:12:38,726 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 08:12:38,726 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 08:08:52" (3/4) ... [2018-12-08 08:12:38,727 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-08 08:12:38,763 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_457ba2dd-a70d-499d-9e2b-cfd8e66bff2f/bin-2019/uautomizer/witness.graphml [2018-12-08 08:12:38,763 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 08:12:38,763 INFO L168 Benchmark]: Toolchain (without parser) took 226251.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 954.4 MB in the beginning and 846.2 MB in the end (delta: 108.2 MB). Peak memory consumption was 233.0 MB. Max. memory is 11.5 GB. [2018-12-08 08:12:38,764 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 08:12:38,764 INFO L168 Benchmark]: CACSL2BoogieTranslator took 150.11 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 943.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-08 08:12:38,764 INFO L168 Benchmark]: Boogie Procedure Inliner took 14.49 ms. Allocated memory is still 1.0 GB. Free memory is still 943.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 08:12:38,764 INFO L168 Benchmark]: Boogie Preprocessor took 45.51 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 102.2 MB). Free memory was 943.6 MB in the beginning and 1.1 GB in the end (delta: -156.7 MB). Peak memory consumption was 12.8 MB. Max. memory is 11.5 GB. [2018-12-08 08:12:38,764 INFO L168 Benchmark]: RCFGBuilder took 129.47 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. [2018-12-08 08:12:38,764 INFO L168 Benchmark]: TraceAbstraction took 225871.33 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 22.5 MB). Free memory was 1.1 GB in the beginning and 851.9 MB in the end (delta: 234.1 MB). Peak memory consumption was 293.6 MB. Max. memory is 11.5 GB. [2018-12-08 08:12:38,765 INFO L168 Benchmark]: Witness Printer took 37.27 ms. Allocated memory is still 1.2 GB. Free memory was 851.9 MB in the beginning and 846.2 MB in the end (delta: 5.7 MB). Peak memory consumption was 5.7 MB. Max. memory is 11.5 GB. [2018-12-08 08:12:38,766 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 150.11 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 943.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 14.49 ms. Allocated memory is still 1.0 GB. Free memory is still 943.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 45.51 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 102.2 MB). Free memory was 943.6 MB in the beginning and 1.1 GB in the end (delta: -156.7 MB). Peak memory consumption was 12.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 129.47 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 225871.33 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 22.5 MB). Free memory was 1.1 GB in the beginning and 851.9 MB in the end (delta: 234.1 MB). Peak memory consumption was 293.6 MB. Max. memory is 11.5 GB. * Witness Printer took 37.27 ms. Allocated memory is still 1.2 GB. Free memory was 851.9 MB in the beginning and 846.2 MB in the end (delta: 5.7 MB). Peak memory consumption was 5.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] char in[11]; [L15] char *s; [L16] unsigned char c; [L17] int i, j; [L18] int idx_in; [L19] i = 0 VAL [i=0, in={4294967286:0}] [L19] COND TRUE i < 11 [L20] in[i] = __VERIFIER_nondet_char() [L19] i++ VAL [i=1, in={4294967286:0}] [L19] COND TRUE i < 11 [L20] in[i] = __VERIFIER_nondet_char() [L19] i++ VAL [i=2, in={4294967286:0}] [L19] COND TRUE i < 11 [L20] in[i] = __VERIFIER_nondet_char() [L19] i++ VAL [i=3, in={4294967286:0}] [L19] COND TRUE i < 11 [L20] in[i] = __VERIFIER_nondet_char() [L19] i++ VAL [i=4, in={4294967286:0}] [L19] COND TRUE i < 11 [L20] in[i] = __VERIFIER_nondet_char() [L19] i++ VAL [i=5, in={4294967286:0}] [L19] COND TRUE i < 11 [L20] in[i] = __VERIFIER_nondet_char() [L19] i++ VAL [i=6, in={4294967286:0}] [L19] COND TRUE i < 11 [L20] in[i] = __VERIFIER_nondet_char() [L19] i++ VAL [i=7, in={4294967286:0}] [L19] COND TRUE i < 11 [L20] in[i] = __VERIFIER_nondet_char() [L19] i++ VAL [i=8, in={4294967286:0}] [L19] COND TRUE i < 11 [L20] in[i] = __VERIFIER_nondet_char() [L19] i++ VAL [i=9, in={4294967286:0}] [L19] COND TRUE i < 11 [L20] in[i] = __VERIFIER_nondet_char() [L19] i++ VAL [i=10, in={4294967286:0}] [L19] COND TRUE i < 11 [L20] in[i] = __VERIFIER_nondet_char() [L19] i++ VAL [i=11, in={4294967286:0}] [L19] COND FALSE !(i < 11) VAL [i=11, in={4294967286:0}] [L21] in[10] = 0 [L22] idx_in = 0 [L23] s = in [L24] i = 0 [L25] EXPR in[idx_in] [L25] c = in[idx_in] [L26] COND TRUE ('0' <= c) && (c <= '9') [L28] j = c - '0' [L29] i = i * 10U + j [L30] idx_in++ [L31] EXPR in[idx_in] [L31] c = in[idx_in] [L26] COND TRUE ('0' <= c) && (c <= '9') [L28] j = c - '0' [L29] i = i * 10U + j [L30] idx_in++ [L31] EXPR in[idx_in] [L31] c = in[idx_in] [L26] COND TRUE ('0' <= c) && (c <= '9') [L28] j = c - '0' [L29] i = i * 10U + j [L30] idx_in++ [L31] EXPR in[idx_in] [L31] c = in[idx_in] [L26] COND TRUE ('0' <= c) && (c <= '9') [L28] j = c - '0' [L29] i = i * 10U + j [L30] idx_in++ [L31] EXPR in[idx_in] [L31] c = in[idx_in] [L26] COND TRUE ('0' <= c) && (c <= '9') [L28] j = c - '0' [L29] i = i * 10U + j [L30] idx_in++ [L31] EXPR in[idx_in] [L31] c = in[idx_in] [L26] COND TRUE ('0' <= c) && (c <= '9') [L28] j = c - '0' [L29] i = i * 10U + j [L30] idx_in++ [L31] EXPR in[idx_in] [L31] c = in[idx_in] [L26] COND TRUE ('0' <= c) && (c <= '9') [L28] j = c - '0' [L29] i = i * 10U + j [L30] idx_in++ [L31] EXPR in[idx_in] [L31] c = in[idx_in] [L26] COND TRUE ('0' <= c) && (c <= '9') [L28] j = c - '0' [L29] i = i * 10U + j [L30] idx_in++ [L31] EXPR in[idx_in] [L31] c = in[idx_in] [L26] COND TRUE ('0' <= c) && (c <= '9') [L28] j = c - '0' [L29] i = i * 10U + j [L30] idx_in++ [L31] EXPR in[idx_in] [L31] c = in[idx_in] [L26] COND TRUE ('0' <= c) && (c <= '9') [L28] j = c - '0' [L29] i = i * 10U + j [L30] idx_in++ [L31] EXPR in[idx_in] [L31] c = in[idx_in] [L26] COND FALSE !(('0' <= c) && (c <= '9')) VAL [c=0, i=-12, idx_in=10, in={4294967286:0}, j=0, s={4294967286:0}] [L34] CALL __VERIFIER_assert (i >= 0) VAL [\old(cond)=0] [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. UNSAFE Result, 225.8s OverallTime, 18 OverallIterations, 11 TraceHistogramMax, 6.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 213 SDtfs, 139 SDslu, 992 SDs, 0 SdLazy, 560 SolverSat, 123 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 6.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 406 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 4.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 17 MinimizatonAttempts, 18 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 210.9s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 1037 NumberOfCodeBlocks, 1015 NumberOfCodeBlocksAsserted, 83 NumberOfCheckSat, 717 ConstructedInterpolants, 7 QuantifiedInterpolants, 60694 SizeOfPredicates, 17 NumberOfNonLiveVariables, 940 ConjunctsInSsa, 96 ConjunctsInUnsatCore, 26 InterpolantComputations, 3 PerfectInterpolantSequences, 901/1653 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...