./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test27_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_7cec6635-a176-4175-bdcf-fa6384d281f3/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_7cec6635-a176-4175-bdcf-fa6384d281f3/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_7cec6635-a176-4175-bdcf-fa6384d281f3/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_7cec6635-a176-4175-bdcf-fa6384d281f3/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test27_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_7cec6635-a176-4175-bdcf-fa6384d281f3/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_7cec6635-a176-4175-bdcf-fa6384d281f3/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 8d15e59fd1b84d7219285b33cc166f567d0bcf3e ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.23-0cd3be1 [2018-11-28 13:17:44,691 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 13:17:44,693 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 13:17:44,703 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 13:17:44,704 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 13:17:44,705 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 13:17:44,706 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 13:17:44,707 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 13:17:44,708 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 13:17:44,709 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 13:17:44,709 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 13:17:44,709 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 13:17:44,710 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 13:17:44,710 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 13:17:44,711 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 13:17:44,711 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 13:17:44,712 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 13:17:44,713 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 13:17:44,715 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 13:17:44,715 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 13:17:44,716 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 13:17:44,717 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 13:17:44,719 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 13:17:44,719 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 13:17:44,720 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 13:17:44,720 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 13:17:44,721 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 13:17:44,721 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 13:17:44,722 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 13:17:44,722 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 13:17:44,723 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 13:17:44,723 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 13:17:44,723 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 13:17:44,723 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 13:17:44,724 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 13:17:44,724 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 13:17:44,724 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_7cec6635-a176-4175-bdcf-fa6384d281f3/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 13:17:44,733 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 13:17:44,734 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 13:17:44,734 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 13:17:44,735 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 13:17:44,735 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 13:17:44,735 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 13:17:44,736 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 13:17:44,736 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 13:17:44,736 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 13:17:44,736 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 13:17:44,736 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 13:17:44,737 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 13:17:44,737 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 13:17:44,737 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 13:17:44,737 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 13:17:44,737 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 13:17:44,737 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 13:17:44,738 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 13:17:44,738 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 13:17:44,738 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 13:17:44,738 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 13:17:44,738 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 13:17:44,739 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 13:17:44,739 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 13:17:44,739 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 13:17:44,739 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 13:17:44,739 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 13:17:44,740 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 13:17:44,740 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 13:17:44,740 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 13:17:44,740 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_7cec6635-a176-4175-bdcf-fa6384d281f3/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 -> 8d15e59fd1b84d7219285b33cc166f567d0bcf3e [2018-11-28 13:17:44,769 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 13:17:44,778 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 13:17:44,780 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 13:17:44,781 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 13:17:44,782 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 13:17:44,782 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_7cec6635-a176-4175-bdcf-fa6384d281f3/bin-2019/uautomizer/../../sv-benchmarks/c/ldv-regression/test27_false-unreach-call_true-termination.c [2018-11-28 13:17:44,828 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7cec6635-a176-4175-bdcf-fa6384d281f3/bin-2019/uautomizer/data/fd0c99b6a/ec7fa8ebe2d34612a10cd1094b9b0b34/FLAGedbc6a265 [2018-11-28 13:17:45,223 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 13:17:45,223 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_7cec6635-a176-4175-bdcf-fa6384d281f3/sv-benchmarks/c/ldv-regression/test27_false-unreach-call_true-termination.c [2018-11-28 13:17:45,228 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7cec6635-a176-4175-bdcf-fa6384d281f3/bin-2019/uautomizer/data/fd0c99b6a/ec7fa8ebe2d34612a10cd1094b9b0b34/FLAGedbc6a265 [2018-11-28 13:17:45,239 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_7cec6635-a176-4175-bdcf-fa6384d281f3/bin-2019/uautomizer/data/fd0c99b6a/ec7fa8ebe2d34612a10cd1094b9b0b34 [2018-11-28 13:17:45,242 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 13:17:45,243 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 13:17:45,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 13:17:45,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 13:17:45,246 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 13:17:45,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:17:45" (1/1) ... [2018-11-28 13:17:45,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42341c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:17:45, skipping insertion in model container [2018-11-28 13:17:45,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:17:45" (1/1) ... [2018-11-28 13:17:45,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 13:17:45,267 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 13:17:45,407 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:17:45,415 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 13:17:45,434 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:17:45,447 INFO L195 MainTranslator]: Completed translation [2018-11-28 13:17:45,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:17:45 WrapperNode [2018-11-28 13:17:45,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 13:17:45,448 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 13:17:45,448 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 13:17:45,448 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 13:17:45,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:17:45" (1/1) ... [2018-11-28 13:17:45,461 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:17:45" (1/1) ... [2018-11-28 13:17:45,508 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 13:17:45,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 13:17:45,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 13:17:45,509 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 13:17:45,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:17:45" (1/1) ... [2018-11-28 13:17:45,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:17:45" (1/1) ... [2018-11-28 13:17:45,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:17:45" (1/1) ... [2018-11-28 13:17:45,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:17:45" (1/1) ... [2018-11-28 13:17:45,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:17:45" (1/1) ... [2018-11-28 13:17:45,530 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:17:45" (1/1) ... [2018-11-28 13:17:45,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:17:45" (1/1) ... [2018-11-28 13:17:45,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 13:17:45,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 13:17:45,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 13:17:45,534 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 13:17:45,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:17:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cec6635-a176-4175-bdcf-fa6384d281f3/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 13:17:45,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-11-28 13:17:45,572 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 13:17:45,573 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 13:17:45,573 INFO L130 BoogieDeclarations]: Found specification of procedure check [2018-11-28 13:17:45,573 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2018-11-28 13:17:45,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-11-28 13:17:45,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-28 13:17:45,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 13:17:45,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 13:17:45,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-28 13:17:45,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 13:17:45,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 13:17:45,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-28 13:17:45,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-28 13:17:45,804 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 13:17:45,804 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-11-28 13:17:45,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:17:45 BoogieIcfgContainer [2018-11-28 13:17:45,805 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 13:17:45,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 13:17:45,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 13:17:45,808 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 13:17:45,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 01:17:45" (1/3) ... [2018-11-28 13:17:45,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73883631 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:17:45, skipping insertion in model container [2018-11-28 13:17:45,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:17:45" (2/3) ... [2018-11-28 13:17:45,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73883631 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:17:45, skipping insertion in model container [2018-11-28 13:17:45,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:17:45" (3/3) ... [2018-11-28 13:17:45,812 INFO L112 eAbstractionObserver]: Analyzing ICFG test27_false-unreach-call_true-termination.c [2018-11-28 13:17:45,821 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 13:17:45,828 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 13:17:45,843 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 13:17:45,864 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 13:17:45,865 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 13:17:45,865 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 13:17:45,865 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 13:17:45,865 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 13:17:45,865 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 13:17:45,865 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 13:17:45,866 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 13:17:45,866 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 13:17:45,878 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2018-11-28 13:17:45,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-28 13:17:45,882 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:17:45,883 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:17:45,884 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:17:45,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:17:45,888 INFO L82 PathProgramCache]: Analyzing trace with hash -899836778, now seen corresponding path program 1 times [2018-11-28 13:17:45,890 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:17:45,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:17:45,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:17:45,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:17:45,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:17:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:17:46,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:17:46,012 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:17:46,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 13:17:46,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-28 13:17:46,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-28 13:17:46,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-28 13:17:46,026 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2018-11-28 13:17:46,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:17:46,040 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2018-11-28 13:17:46,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-28 13:17:46,042 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-11-28 13:17:46,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:17:46,050 INFO L225 Difference]: With dead ends: 42 [2018-11-28 13:17:46,050 INFO L226 Difference]: Without dead ends: 20 [2018-11-28 13:17:46,052 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 [2018-11-28 13:17:46,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-11-28 13:17:46,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-11-28 13:17:46,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-28 13:17:46,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-11-28 13:17:46,078 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2018-11-28 13:17:46,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:17:46,078 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-11-28 13:17:46,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-28 13:17:46,079 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-11-28 13:17:46,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-28 13:17:46,079 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:17:46,079 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:17:46,080 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:17:46,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:17:46,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1137678901, now seen corresponding path program 1 times [2018-11-28 13:17:46,080 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:17:46,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:17:46,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:17:46,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:17:46,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:17:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:17:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:17:46,148 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:17:46,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 13:17:46,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 13:17:46,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 13:17:46,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 13:17:46,150 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 3 states. [2018-11-28 13:17:46,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:17:46,174 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-11-28 13:17:46,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 13:17:46,175 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2018-11-28 13:17:46,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:17:46,176 INFO L225 Difference]: With dead ends: 34 [2018-11-28 13:17:46,176 INFO L226 Difference]: Without dead ends: 22 [2018-11-28 13:17:46,177 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 [2018-11-28 13:17:46,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-28 13:17:46,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-11-28 13:17:46,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 13:17:46,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-28 13:17:46,181 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-11-28 13:17:46,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:17:46,182 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-28 13:17:46,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 13:17:46,182 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-28 13:17:46,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-28 13:17:46,182 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:17:46,183 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:17:46,183 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:17:46,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:17:46,183 INFO L82 PathProgramCache]: Analyzing trace with hash 278779309, now seen corresponding path program 1 times [2018-11-28 13:17:46,183 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:17:46,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:17:46,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:17:46,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:17:46,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:17:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:17:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:17:46,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:17:46,258 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cec6635-a176-4175-bdcf-fa6384d281f3/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:17:46,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:17:46,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:17:46,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:17:46,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:17:46,364 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:17:46,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-11-28 13:17:46,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 13:17:46,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 13:17:46,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:17:46,365 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2018-11-28 13:17:46,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:17:46,388 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-11-28 13:17:46,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 13:17:46,389 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-11-28 13:17:46,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:17:46,389 INFO L225 Difference]: With dead ends: 36 [2018-11-28 13:17:46,389 INFO L226 Difference]: Without dead ends: 24 [2018-11-28 13:17:46,390 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:17:46,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-28 13:17:46,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-11-28 13:17:46,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-28 13:17:46,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-11-28 13:17:46,393 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-11-28 13:17:46,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:17:46,393 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-11-28 13:17:46,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 13:17:46,393 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-11-28 13:17:46,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-28 13:17:46,394 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:17:46,394 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:17:46,394 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:17:46,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:17:46,395 INFO L82 PathProgramCache]: Analyzing trace with hash -9513713, now seen corresponding path program 2 times [2018-11-28 13:17:46,395 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:17:46,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:17:46,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:17:46,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:17:46,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:17:46,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:17:46,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:17:46,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:17:46,482 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cec6635-a176-4175-bdcf-fa6384d281f3/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:17:46,492 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:17:46,545 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:17:46,545 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:17:46,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:17:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:17:46,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:17:46,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-11-28 13:17:46,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 13:17:46,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 13:17:46,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-28 13:17:46,572 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2018-11-28 13:17:46,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:17:46,610 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-11-28 13:17:46,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 13:17:46,611 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-11-28 13:17:46,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:17:46,612 INFO L225 Difference]: With dead ends: 38 [2018-11-28 13:17:46,612 INFO L226 Difference]: Without dead ends: 26 [2018-11-28 13:17:46,612 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-28 13:17:46,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-28 13:17:46,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-11-28 13:17:46,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-28 13:17:46,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-11-28 13:17:46,616 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-11-28 13:17:46,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:17:46,616 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-11-28 13:17:46,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 13:17:46,616 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-11-28 13:17:46,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-28 13:17:46,616 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:17:46,617 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:17:46,617 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:17:46,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:17:46,617 INFO L82 PathProgramCache]: Analyzing trace with hash 2113766385, now seen corresponding path program 3 times [2018-11-28 13:17:46,617 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:17:46,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:17:46,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:17:46,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:17:46,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:17:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:17:46,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:17:46,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:17:46,676 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cec6635-a176-4175-bdcf-fa6384d281f3/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:17:46,689 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 13:17:46,806 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-28 13:17:46,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:17:46,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:17:46,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:17:46,859 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:17:46,859 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-11-28 13:17:46,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-28 13:17:46,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 13:17:46,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-28 13:17:46,860 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 7 states. [2018-11-28 13:17:46,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:17:46,920 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2018-11-28 13:17:46,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 13:17:46,921 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2018-11-28 13:17:46,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:17:46,921 INFO L225 Difference]: With dead ends: 40 [2018-11-28 13:17:46,922 INFO L226 Difference]: Without dead ends: 28 [2018-11-28 13:17:46,922 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-28 13:17:46,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-28 13:17:46,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-11-28 13:17:46,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-28 13:17:46,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-28 13:17:46,927 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-11-28 13:17:46,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:17:46,927 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-28 13:17:46,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-28 13:17:46,928 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-28 13:17:46,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-28 13:17:46,928 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:17:46,928 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:17:46,929 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:17:46,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:17:46,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1818492333, now seen corresponding path program 4 times [2018-11-28 13:17:46,929 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:17:46,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:17:46,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:17:46,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:17:46,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:17:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:17:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:17:47,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:17:47,024 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cec6635-a176-4175-bdcf-fa6384d281f3/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:17:47,044 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 13:17:47,082 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 13:17:47,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:17:47,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:17:47,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:17:47,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:17:47,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-28 13:17:47,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 13:17:47,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 13:17:47,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-28 13:17:47,125 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2018-11-28 13:17:47,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:17:47,161 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-11-28 13:17:47,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 13:17:47,162 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-11-28 13:17:47,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:17:47,163 INFO L225 Difference]: With dead ends: 42 [2018-11-28 13:17:47,163 INFO L226 Difference]: Without dead ends: 30 [2018-11-28 13:17:47,163 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-28 13:17:47,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-28 13:17:47,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-11-28 13:17:47,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-28 13:17:47,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-11-28 13:17:47,168 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-11-28 13:17:47,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:17:47,169 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-11-28 13:17:47,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 13:17:47,169 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-11-28 13:17:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-28 13:17:47,170 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:17:47,170 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:17:47,170 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:17:47,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:17:47,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1147899851, now seen corresponding path program 5 times [2018-11-28 13:17:47,171 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:17:47,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:17:47,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:17:47,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:17:47,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:17:47,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:17:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:17:47,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:17:47,260 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cec6635-a176-4175-bdcf-fa6384d281f3/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:17:47,276 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 13:17:48,564 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-28 13:17:48,564 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:17:48,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:17:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:17:48,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:17:48,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-28 13:17:48,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 13:17:48,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 13:17:48,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-28 13:17:48,603 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 9 states. [2018-11-28 13:17:48,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:17:48,643 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-11-28 13:17:48,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 13:17:48,644 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-11-28 13:17:48,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:17:48,645 INFO L225 Difference]: With dead ends: 44 [2018-11-28 13:17:48,645 INFO L226 Difference]: Without dead ends: 32 [2018-11-28 13:17:48,645 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-28 13:17:48,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-28 13:17:48,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-11-28 13:17:48,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-28 13:17:48,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-11-28 13:17:48,649 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2018-11-28 13:17:48,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:17:48,649 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-11-28 13:17:48,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 13:17:48,649 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-11-28 13:17:48,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-11-28 13:17:48,650 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:17:48,650 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:17:48,651 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:17:48,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:17:48,651 INFO L82 PathProgramCache]: Analyzing trace with hash -953619049, now seen corresponding path program 6 times [2018-11-28 13:17:48,651 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:17:48,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:17:48,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:17:48,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:17:48,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:17:48,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:17:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:17:48,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:17:48,757 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cec6635-a176-4175-bdcf-fa6384d281f3/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:17:48,770 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 13:17:49,349 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-28 13:17:49,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:17:49,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:17:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:17:49,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:17:49,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-28 13:17:49,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 13:17:49,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 13:17:49,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-28 13:17:49,395 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 10 states. [2018-11-28 13:17:49,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:17:49,434 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2018-11-28 13:17:49,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 13:17:49,435 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2018-11-28 13:17:49,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:17:49,435 INFO L225 Difference]: With dead ends: 46 [2018-11-28 13:17:49,436 INFO L226 Difference]: Without dead ends: 34 [2018-11-28 13:17:49,436 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-28 13:17:49,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-28 13:17:49,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-11-28 13:17:49,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-28 13:17:49,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-28 13:17:49,441 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-11-28 13:17:49,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:17:49,441 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-28 13:17:49,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 13:17:49,441 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-28 13:17:49,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-28 13:17:49,442 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:17:49,442 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:17:49,443 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:17:49,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:17:49,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1066637945, now seen corresponding path program 7 times [2018-11-28 13:17:49,443 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:17:49,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:17:49,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:17:49,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:17:49,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:17:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:17:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:17:49,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:17:49,556 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cec6635-a176-4175-bdcf-fa6384d281f3/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:17:49,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:17:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:17:49,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:17:49,637 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:17:49,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:17:49,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-28 13:17:49,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 13:17:49,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 13:17:49,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-28 13:17:49,668 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-11-28 13:17:49,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:17:49,756 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-11-28 13:17:49,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 13:17:49,759 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2018-11-28 13:17:49,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:17:49,760 INFO L225 Difference]: With dead ends: 48 [2018-11-28 13:17:49,760 INFO L226 Difference]: Without dead ends: 36 [2018-11-28 13:17:49,760 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-28 13:17:49,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-28 13:17:49,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-11-28 13:17:49,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-28 13:17:49,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-11-28 13:17:49,765 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-11-28 13:17:49,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:17:49,765 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-11-28 13:17:49,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 13:17:49,766 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-11-28 13:17:49,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-28 13:17:49,766 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:17:49,767 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:17:49,767 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:17:49,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:17:49,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1208391387, now seen corresponding path program 8 times [2018-11-28 13:17:49,767 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:17:49,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:17:49,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:17:49,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:17:49,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:17:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:17:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:17:49,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:17:49,931 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cec6635-a176-4175-bdcf-fa6384d281f3/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:17:49,951 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:17:50,017 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:17:50,017 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:17:50,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:17:50,047 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:17:50,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:17:50,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-28 13:17:50,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 13:17:50,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 13:17:50,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-28 13:17:50,082 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 12 states. [2018-11-28 13:17:50,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:17:50,139 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-11-28 13:17:50,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 13:17:50,141 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2018-11-28 13:17:50,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:17:50,142 INFO L225 Difference]: With dead ends: 50 [2018-11-28 13:17:50,142 INFO L226 Difference]: Without dead ends: 38 [2018-11-28 13:17:50,142 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-28 13:17:50,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-28 13:17:50,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-11-28 13:17:50,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-28 13:17:50,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-11-28 13:17:50,148 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-11-28 13:17:50,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:17:50,148 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-11-28 13:17:50,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 13:17:50,149 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-11-28 13:17:50,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-28 13:17:50,149 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:17:50,149 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:17:50,150 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:17:50,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:17:50,150 INFO L82 PathProgramCache]: Analyzing trace with hash -5504323, now seen corresponding path program 9 times [2018-11-28 13:17:50,150 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:17:50,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:17:50,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:17:50,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:17:50,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:17:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:17:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:17:50,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:17:50,251 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cec6635-a176-4175-bdcf-fa6384d281f3/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:17:50,262 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 13:17:55,706 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-28 13:17:55,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:17:55,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:17:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:17:55,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:17:55,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-28 13:17:55,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 13:17:55,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 13:17:55,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-28 13:17:55,749 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 13 states. [2018-11-28 13:17:55,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:17:55,804 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-11-28 13:17:55,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 13:17:55,805 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2018-11-28 13:17:55,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:17:55,805 INFO L225 Difference]: With dead ends: 51 [2018-11-28 13:17:55,806 INFO L226 Difference]: Without dead ends: 39 [2018-11-28 13:17:55,806 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-28 13:17:55,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-28 13:17:55,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-28 13:17:55,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-28 13:17:55,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-28 13:17:55,809 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-11-28 13:17:55,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:17:55,809 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-28 13:17:55,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 13:17:55,809 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-28 13:17:55,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-11-28 13:17:55,810 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:17:55,810 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:17:55,810 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:17:55,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:17:55,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1671822879, now seen corresponding path program 10 times [2018-11-28 13:17:55,811 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:17:55,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:17:55,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:17:55,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:17:55,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:17:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 13:17:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 13:17:56,110 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-11-28 13:17:56,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 01:17:56 BoogieIcfgContainer [2018-11-28 13:17:56,149 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 13:17:56,149 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 13:17:56,149 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 13:17:56,151 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 13:17:56,151 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:17:45" (3/4) ... [2018-11-28 13:17:56,153 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-28 13:17:56,206 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_7cec6635-a176-4175-bdcf-fa6384d281f3/bin-2019/uautomizer/witness.graphml [2018-11-28 13:17:56,206 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 13:17:56,207 INFO L168 Benchmark]: Toolchain (without parser) took 10965.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 953.3 MB in the beginning and 886.4 MB in the end (delta: 66.9 MB). Peak memory consumption was 205.3 MB. Max. memory is 11.5 GB. [2018-11-28 13:17:56,209 INFO L168 Benchmark]: CDTParser took 0.13 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. [2018-11-28 13:17:56,209 INFO L168 Benchmark]: CACSL2BoogieTranslator took 204.73 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 13:17:56,210 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 942.6 MB in the beginning and 1.1 GB in the end (delta: -193.8 MB). Peak memory consumption was 15.6 MB. Max. memory is 11.5 GB. [2018-11-28 13:17:56,210 INFO L168 Benchmark]: Boogie Preprocessor took 24.52 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:17:56,210 INFO L168 Benchmark]: RCFGBuilder took 271.42 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2018-11-28 13:17:56,211 INFO L168 Benchmark]: TraceAbstraction took 10343.65 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 889.7 MB in the end (delta: 224.3 MB). Peak memory consumption was 224.3 MB. Max. memory is 11.5 GB. [2018-11-28 13:17:56,211 INFO L168 Benchmark]: Witness Printer took 57.36 ms. Allocated memory is still 1.2 GB. Free memory was 889.7 MB in the beginning and 886.4 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. [2018-11-28 13:17:56,213 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 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 204.73 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.6 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 60.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 942.6 MB in the beginning and 1.1 GB in the end (delta: -193.8 MB). Peak memory consumption was 15.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.52 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 271.42 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 10343.65 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 889.7 MB in the end (delta: 224.3 MB). Peak memory consumption was 224.3 MB. Max. memory is 11.5 GB. * Witness Printer took 57.36 ms. Allocated memory is still 1.2 GB. Free memory was 889.7 MB in the beginning and 886.4 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 51]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] struct cont cont; [L23] struct dummy dummy; [L24] struct dummy *dummies[10]; [L25] int a[10]; [L26] int i, *pa; [L27] i = __VERIFIER_nondet_int() [L28] int j = 0; VAL [a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=1, j=0] [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ VAL [a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=1, j=1] [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ VAL [a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=1, j=2] [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ VAL [a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=1, j=3] [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ VAL [a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=1, j=4] [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ VAL [a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=1, j=5] [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ VAL [a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=1, j=6] [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ VAL [a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=1, j=7] [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ VAL [a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=1, j=8] [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ VAL [a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=1, j=9] [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ VAL [a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=1, j=10] [L28] COND FALSE !(j < 10) VAL [a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=1, j=10] [L32] COND TRUE i >= 0 && i < 9 [L33] a[i] = i [L34] dummy.array = &a[i] [L35] dummies[i + 1] = &dummy [L36] cont.array = &dummies[0] [L37] EXPR cont.array [L37] EXPR cont.array[i] [L37] EXPR cont.array[i]->array [L37] pa = &cont.array[i]->array[i] [L38] EXPR a[i] VAL [a={102:0}, a[i]=1, cont={72:0}, dummies={56:0}, dummy={101:0}, i=1, j=10, pa={57:0}] [L38] COND TRUE a[i] > 0 [L39] EXPR dummies[i + 1] [L39] EXPR dummies[i + 1]->array [L39] EXPR dummies[i + 1]->array[i] [L39] i = dummies[i + 1]->array[i] - 10 [L40] EXPR \read(*pa) VAL [\read(*pa)=0, a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=0, j=10, pa={57:0}] [L40] COND FALSE !(i < *pa) [L43] CALL, EXPR check(&cont, i) VAL [\old(i)=0, pc={72:0}] [L17] EXPR pc->array [L17] EXPR pc->array[i] [L17] EXPR pc->array[i]->array [L17] EXPR pc->array[i]->array[i] [L17] return pc->array[i]->array[i] == i; [L43] RET, EXPR check(&cont, i) VAL [a={102:0}, check(&cont, i)=0, cont={72:0}, dummies={56:0}, dummy={101:0}, i=0, j=10, pa={57:0}] [L43] COND TRUE !check(&cont, i) [L51] __VERIFIER_error() VAL [a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=0, j=10, pa={57:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. UNSAFE Result, 10.2s OverallTime, 12 OverallIterations, 10 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 218 SDtfs, 55 SDslu, 680 SDs, 0 SdLazy, 179 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 320 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=11, 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, 11 MinimizatonAttempts, 9 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 7.9s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 577 NumberOfCodeBlocks, 577 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 519 ConstructedInterpolants, 0 QuantifiedInterpolants, 25833 SizeOfPredicates, 9 NumberOfNonLiveVariables, 1395 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 0/570 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...