./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/ldv-regression/test25_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_3dda5aa2-e34b-46e6-a826-10ce02e2c6ba/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_3dda5aa2-e34b-46e6-a826-10ce02e2c6ba/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_3dda5aa2-e34b-46e6-a826-10ce02e2c6ba/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_3dda5aa2-e34b-46e6-a826-10ce02e2c6ba/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test25_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_3dda5aa2-e34b-46e6-a826-10ce02e2c6ba/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_3dda5aa2-e34b-46e6-a826-10ce02e2c6ba/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 ef8f82b31b77c43c96cf1b9cfaef9c4e99ae1632 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.23-5842f4b [2018-11-18 17:17:46,877 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 17:17:46,878 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 17:17:46,885 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 17:17:46,885 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 17:17:46,886 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 17:17:46,887 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 17:17:46,888 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 17:17:46,889 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 17:17:46,890 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 17:17:46,890 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 17:17:46,890 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 17:17:46,891 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 17:17:46,892 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 17:17:46,892 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 17:17:46,894 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 17:17:46,894 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 17:17:46,895 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 17:17:46,897 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 17:17:46,898 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 17:17:46,898 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 17:17:46,899 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 17:17:46,901 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 17:17:46,901 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 17:17:46,901 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 17:17:46,902 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 17:17:46,902 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 17:17:46,903 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 17:17:46,903 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 17:17:46,904 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 17:17:46,904 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 17:17:46,904 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 17:17:46,904 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 17:17:46,904 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 17:17:46,905 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 17:17:46,906 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 17:17:46,906 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_3dda5aa2-e34b-46e6-a826-10ce02e2c6ba/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-18 17:17:46,912 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 17:17:46,913 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 17:17:46,913 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 17:17:46,913 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-18 17:17:46,914 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 17:17:46,914 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 17:17:46,914 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 17:17:46,914 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 17:17:46,914 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 17:17:46,914 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 17:17:46,914 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 17:17:46,914 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 17:17:46,915 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 17:17:46,915 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 17:17:46,915 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 17:17:46,915 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 17:17:46,915 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 17:17:46,915 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 17:17:46,915 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 17:17:46,916 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 17:17:46,916 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 17:17:46,916 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 17:17:46,916 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 17:17:46,916 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 17:17:46,916 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 17:17:46,917 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 17:17:46,917 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 17:17:46,917 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 17:17:46,917 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 17:17:46,917 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 17:17:46,917 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_3dda5aa2-e34b-46e6-a826-10ce02e2c6ba/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 -> ef8f82b31b77c43c96cf1b9cfaef9c4e99ae1632 [2018-11-18 17:17:46,940 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 17:17:46,949 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 17:17:46,952 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 17:17:46,952 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 17:17:46,953 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 17:17:46,953 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_3dda5aa2-e34b-46e6-a826-10ce02e2c6ba/bin-2019/uautomizer/../../sv-benchmarks/c/ldv-regression/test25_false-unreach-call_true-termination.c [2018-11-18 17:17:46,989 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3dda5aa2-e34b-46e6-a826-10ce02e2c6ba/bin-2019/uautomizer/data/a7f1a7d27/90a6201988a04cf58f450829fa381ea6/FLAGcc4cd50b3 [2018-11-18 17:17:47,383 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 17:17:47,383 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_3dda5aa2-e34b-46e6-a826-10ce02e2c6ba/sv-benchmarks/c/ldv-regression/test25_false-unreach-call_true-termination.c [2018-11-18 17:17:47,387 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3dda5aa2-e34b-46e6-a826-10ce02e2c6ba/bin-2019/uautomizer/data/a7f1a7d27/90a6201988a04cf58f450829fa381ea6/FLAGcc4cd50b3 [2018-11-18 17:17:47,397 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_3dda5aa2-e34b-46e6-a826-10ce02e2c6ba/bin-2019/uautomizer/data/a7f1a7d27/90a6201988a04cf58f450829fa381ea6 [2018-11-18 17:17:47,399 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 17:17:47,400 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 17:17:47,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 17:17:47,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 17:17:47,403 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 17:17:47,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 05:17:47" (1/1) ... [2018-11-18 17:17:47,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@602e9054 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:17:47, skipping insertion in model container [2018-11-18 17:17:47,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 05:17:47" (1/1) ... [2018-11-18 17:17:47,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 17:17:47,423 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 17:17:47,536 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 17:17:47,541 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 17:17:47,552 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 17:17:47,561 INFO L195 MainTranslator]: Completed translation [2018-11-18 17:17:47,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:17:47 WrapperNode [2018-11-18 17:17:47,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 17:17:47,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 17:17:47,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 17:17:47,562 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 17:17:47,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:17:47" (1/1) ... [2018-11-18 17:17:47,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:17:47" (1/1) ... [2018-11-18 17:17:47,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:17:47" (1/1) ... [2018-11-18 17:17:47,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:17:47" (1/1) ... [2018-11-18 17:17:47,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:17:47" (1/1) ... [2018-11-18 17:17:47,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:17:47" (1/1) ... [2018-11-18 17:17:47,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:17:47" (1/1) ... [2018-11-18 17:17:47,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 17:17:47,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 17:17:47,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 17:17:47,625 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 17:17:47,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:17:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3dda5aa2-e34b-46e6-a826-10ce02e2c6ba/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 17:17:47,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 17:17:47,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 17:17:47,668 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2018-11-18 17:17:47,668 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 17:17:47,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 17:17:47,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-18 17:17:47,669 INFO L130 BoogieDeclarations]: Found specification of procedure check [2018-11-18 17:17:47,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-11-18 17:17:47,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-18 17:17:47,669 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 17:17:47,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 17:17:47,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-18 17:17:47,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-11-18 17:17:47,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-18 17:17:47,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 17:17:47,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 17:17:47,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-11-18 17:17:47,822 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 17:17:47,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 05:17:47 BoogieIcfgContainer [2018-11-18 17:17:47,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 17:17:47,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 17:17:47,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 17:17:47,825 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 17:17:47,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 05:17:47" (1/3) ... [2018-11-18 17:17:47,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64c915f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 05:17:47, skipping insertion in model container [2018-11-18 17:17:47,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:17:47" (2/3) ... [2018-11-18 17:17:47,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64c915f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 05:17:47, skipping insertion in model container [2018-11-18 17:17:47,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 05:17:47" (3/3) ... [2018-11-18 17:17:47,828 INFO L112 eAbstractionObserver]: Analyzing ICFG test25_false-unreach-call_true-termination.c [2018-11-18 17:17:47,836 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 17:17:47,843 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 17:17:47,856 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 17:17:47,883 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 17:17:47,883 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 17:17:47,883 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 17:17:47,883 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 17:17:47,884 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 17:17:47,884 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 17:17:47,884 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 17:17:47,884 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 17:17:47,884 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 17:17:47,900 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2018-11-18 17:17:47,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-18 17:17:47,905 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:17:47,905 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:17:47,907 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:17:47,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:17:47,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1801897061, now seen corresponding path program 1 times [2018-11-18 17:17:47,914 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:17:47,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:17:47,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:47,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:17:47,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:17:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 17:17:48,026 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:17:48,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 17:17:48,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 17:17:48,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 17:17:48,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 17:17:48,042 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2018-11-18 17:17:48,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:17:48,058 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2018-11-18 17:17:48,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 17:17:48,059 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-11-18 17:17:48,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:17:48,067 INFO L225 Difference]: With dead ends: 45 [2018-11-18 17:17:48,067 INFO L226 Difference]: Without dead ends: 22 [2018-11-18 17:17:48,069 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 17:17:48,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-18 17:17:48,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-18 17:17:48,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-18 17:17:48,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-11-18 17:17:48,090 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2018-11-18 17:17:48,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:17:48,091 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-11-18 17:17:48,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 17:17:48,091 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-11-18 17:17:48,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-18 17:17:48,092 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:17:48,092 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:17:48,092 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:17:48,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:17:48,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1616588955, now seen corresponding path program 1 times [2018-11-18 17:17:48,092 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:17:48,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:17:48,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:48,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:17:48,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:17:48,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 17:17:48,142 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:17:48,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 17:17:48,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 17:17:48,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 17:17:48,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 17:17:48,144 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 3 states. [2018-11-18 17:17:48,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:17:48,166 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-11-18 17:17:48,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 17:17:48,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2018-11-18 17:17:48,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:17:48,167 INFO L225 Difference]: With dead ends: 38 [2018-11-18 17:17:48,167 INFO L226 Difference]: Without dead ends: 25 [2018-11-18 17:17:48,168 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 17:17:48,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-18 17:17:48,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2018-11-18 17:17:48,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 17:17:48,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-18 17:17:48,171 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2018-11-18 17:17:48,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:17:48,171 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-18 17:17:48,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 17:17:48,171 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-18 17:17:48,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-18 17:17:48,172 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:17:48,172 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:17:48,172 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:17:48,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:17:48,172 INFO L82 PathProgramCache]: Analyzing trace with hash -82078787, now seen corresponding path program 1 times [2018-11-18 17:17:48,172 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:17:48,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:17:48,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:48,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:17:48,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:48,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:17:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 17:17:48,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:17:48,234 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3dda5aa2-e34b-46e6-a826-10ce02e2c6ba/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:17:48,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:17:48,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:17:48,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:17:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 17:17:48,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:17:48,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-11-18 17:17:48,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 17:17:48,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 17:17:48,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-18 17:17:48,314 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 5 states. [2018-11-18 17:17:48,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:17:48,345 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-11-18 17:17:48,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 17:17:48,345 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-11-18 17:17:48,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:17:48,346 INFO L225 Difference]: With dead ends: 41 [2018-11-18 17:17:48,346 INFO L226 Difference]: Without dead ends: 28 [2018-11-18 17:17:48,346 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-18 17:17:48,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-18 17:17:48,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-11-18 17:17:48,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-18 17:17:48,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-18 17:17:48,350 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2018-11-18 17:17:48,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:17:48,350 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-18 17:17:48,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 17:17:48,350 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-18 17:17:48,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-18 17:17:48,350 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:17:48,351 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:17:48,351 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:17:48,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:17:48,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1788099237, now seen corresponding path program 2 times [2018-11-18 17:17:48,351 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:17:48,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:17:48,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:48,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:17:48,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:17:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 17:17:48,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:17:48,407 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3dda5aa2-e34b-46e6-a826-10ce02e2c6ba/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:17:48,413 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 17:17:48,436 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-11-18 17:17:48,436 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:17:48,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:17:48,484 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2018-11-18 17:17:48,486 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2018-11-18 17:17:48,487 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 17:17:48,493 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 17:17:48,494 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 17:17:48,495 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:17, output treesize:5 [2018-11-18 17:17:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 17:17:48,518 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 17:17:48,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2018-11-18 17:17:48,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 17:17:48,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 17:17:48,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-11-18 17:17:48,519 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2018-11-18 17:17:48,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:17:48,564 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2018-11-18 17:17:48,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 17:17:48,564 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-11-18 17:17:48,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:17:48,565 INFO L225 Difference]: With dead ends: 47 [2018-11-18 17:17:48,565 INFO L226 Difference]: Without dead ends: 34 [2018-11-18 17:17:48,566 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-11-18 17:17:48,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-18 17:17:48,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-11-18 17:17:48,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-18 17:17:48,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-18 17:17:48,569 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 26 [2018-11-18 17:17:48,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:17:48,569 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-18 17:17:48,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 17:17:48,570 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-18 17:17:48,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-18 17:17:48,570 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:17:48,570 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:17:48,571 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:17:48,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:17:48,571 INFO L82 PathProgramCache]: Analyzing trace with hash 2098008838, now seen corresponding path program 1 times [2018-11-18 17:17:48,571 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:17:48,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:17:48,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:48,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 17:17:48,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:17:48,632 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 17:17:48,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:17:48,633 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3dda5aa2-e34b-46e6-a826-10ce02e2c6ba/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:17:48,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:17:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:17:48,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:17:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 17:17:48,707 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:17:48,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-11-18 17:17:48,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 17:17:48,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 17:17:48,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-18 17:17:48,708 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 7 states. [2018-11-18 17:17:48,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:17:48,728 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-11-18 17:17:48,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 17:17:48,729 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2018-11-18 17:17:48,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:17:48,729 INFO L225 Difference]: With dead ends: 53 [2018-11-18 17:17:48,729 INFO L226 Difference]: Without dead ends: 37 [2018-11-18 17:17:48,730 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-18 17:17:48,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-18 17:17:48,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2018-11-18 17:17:48,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-18 17:17:48,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-18 17:17:48,734 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2018-11-18 17:17:48,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:17:48,735 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-18 17:17:48,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 17:17:48,735 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-18 17:17:48,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-18 17:17:48,735 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:17:48,735 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:17:48,736 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:17:48,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:17:48,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1354224424, now seen corresponding path program 2 times [2018-11-18 17:17:48,736 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:17:48,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:17:48,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:48,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:17:48,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:17:48,836 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 17:17:48,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:17:48,837 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3dda5aa2-e34b-46e6-a826-10ce02e2c6ba/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:17:48,852 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 17:17:48,877 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 17:17:48,877 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:17:48,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:17:48,908 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 17:17:48,923 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:17:48,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-18 17:17:48,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 17:17:48,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 17:17:48,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-18 17:17:48,924 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 8 states. [2018-11-18 17:17:48,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:17:48,953 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-11-18 17:17:48,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 17:17:48,954 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2018-11-18 17:17:48,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:17:48,955 INFO L225 Difference]: With dead ends: 56 [2018-11-18 17:17:48,955 INFO L226 Difference]: Without dead ends: 40 [2018-11-18 17:17:48,955 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-18 17:17:48,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-11-18 17:17:48,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2018-11-18 17:17:48,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-18 17:17:48,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-18 17:17:48,960 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 35 [2018-11-18 17:17:48,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:17:48,960 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-18 17:17:48,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 17:17:48,960 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-18 17:17:48,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-11-18 17:17:48,961 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:17:48,961 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:17:48,961 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:17:48,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:17:48,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1009027014, now seen corresponding path program 3 times [2018-11-18 17:17:48,962 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:17:48,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:17:48,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:48,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 17:17:48,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:17:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 17:17:49,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:17:49,031 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3dda5aa2-e34b-46e6-a826-10ce02e2c6ba/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:17:49,046 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 17:17:49,065 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-18 17:17:49,065 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:17:49,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:17:49,124 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2018-11-18 17:17:49,126 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2018-11-18 17:17:49,127 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 17:17:49,129 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 17:17:49,130 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 17:17:49,130 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:17, output treesize:5 [2018-11-18 17:17:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-18 17:17:49,167 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:17:49,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2018-11-18 17:17:49,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 17:17:49,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 17:17:49,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-11-18 17:17:49,168 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 12 states. [2018-11-18 17:17:49,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:17:49,244 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2018-11-18 17:17:49,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 17:17:49,245 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2018-11-18 17:17:49,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:17:49,246 INFO L225 Difference]: With dead ends: 62 [2018-11-18 17:17:49,246 INFO L226 Difference]: Without dead ends: 46 [2018-11-18 17:17:49,246 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-11-18 17:17:49,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-11-18 17:17:49,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2018-11-18 17:17:49,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-18 17:17:49,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-18 17:17:49,250 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 38 [2018-11-18 17:17:49,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:17:49,251 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-18 17:17:49,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 17:17:49,251 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-18 17:17:49,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-18 17:17:49,251 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:17:49,252 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:17:49,252 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:17:49,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:17:49,252 INFO L82 PathProgramCache]: Analyzing trace with hash -266078277, now seen corresponding path program 4 times [2018-11-18 17:17:49,252 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:17:49,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:17:49,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:49,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 17:17:49,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:49,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:17:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-18 17:17:49,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:17:49,323 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3dda5aa2-e34b-46e6-a826-10ce02e2c6ba/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:17:49,342 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 17:17:49,356 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 17:17:49,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:17:49,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:17:49,405 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2018-11-18 17:17:49,407 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2018-11-18 17:17:49,408 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 17:17:49,412 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 17:17:49,413 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 17:17:49,413 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:17, output treesize:5 [2018-11-18 17:17:49,423 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-18 17:17:49,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:17:49,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2018-11-18 17:17:49,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 17:17:49,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 17:17:49,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2018-11-18 17:17:49,439 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 14 states. [2018-11-18 17:17:49,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:17:49,529 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2018-11-18 17:17:49,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-18 17:17:49,529 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2018-11-18 17:17:49,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:17:49,530 INFO L225 Difference]: With dead ends: 71 [2018-11-18 17:17:49,530 INFO L226 Difference]: Without dead ends: 52 [2018-11-18 17:17:49,530 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2018-11-18 17:17:49,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-11-18 17:17:49,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2018-11-18 17:17:49,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-18 17:17:49,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-11-18 17:17:49,534 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 44 [2018-11-18 17:17:49,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:17:49,534 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-11-18 17:17:49,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 17:17:49,535 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-11-18 17:17:49,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-18 17:17:49,535 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:17:49,535 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:17:49,537 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:17:49,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:17:49,537 INFO L82 PathProgramCache]: Analyzing trace with hash -950535898, now seen corresponding path program 5 times [2018-11-18 17:17:49,537 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:17:49,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:17:49,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:49,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 17:17:49,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:17:49,606 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 17:17:49,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:17:49,607 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3dda5aa2-e34b-46e6-a826-10ce02e2c6ba/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:17:49,619 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 17:17:49,673 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-11-18 17:17:49,673 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:17:49,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:17:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 17:17:49,700 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:17:49,700 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-18 17:17:49,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 17:17:49,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 17:17:49,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-18 17:17:49,701 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 11 states. [2018-11-18 17:17:49,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:17:49,721 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-11-18 17:17:49,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 17:17:49,723 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2018-11-18 17:17:49,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:17:49,724 INFO L225 Difference]: With dead ends: 77 [2018-11-18 17:17:49,724 INFO L226 Difference]: Without dead ends: 55 [2018-11-18 17:17:49,725 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-18 17:17:49,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-11-18 17:17:49,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2018-11-18 17:17:49,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-18 17:17:49,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-11-18 17:17:49,729 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 50 [2018-11-18 17:17:49,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:17:49,729 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-11-18 17:17:49,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 17:17:49,729 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-11-18 17:17:49,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-18 17:17:49,730 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:17:49,730 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:17:49,730 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:17:49,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:17:49,730 INFO L82 PathProgramCache]: Analyzing trace with hash -562842424, now seen corresponding path program 6 times [2018-11-18 17:17:49,731 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:17:49,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:17:49,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:49,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 17:17:49,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:49,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:17:49,820 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 17:17:49,820 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:17:49,820 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3dda5aa2-e34b-46e6-a826-10ce02e2c6ba/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:17:49,838 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 17:17:49,933 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-18 17:17:49,933 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:17:49,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:17:50,015 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2018-11-18 17:17:50,018 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2018-11-18 17:17:50,019 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 17:17:50,021 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 17:17:50,023 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 17:17:50,023 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:17, output treesize:5 [2018-11-18 17:17:50,034 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-18 17:17:50,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:17:50,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2018-11-18 17:17:50,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-18 17:17:50,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-18 17:17:50,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2018-11-18 17:17:50,051 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 17 states. [2018-11-18 17:17:50,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:17:50,163 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2018-11-18 17:17:50,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-18 17:17:50,163 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2018-11-18 17:17:50,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:17:50,164 INFO L225 Difference]: With dead ends: 83 [2018-11-18 17:17:50,164 INFO L226 Difference]: Without dead ends: 61 [2018-11-18 17:17:50,164 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2018-11-18 17:17:50,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-11-18 17:17:50,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2018-11-18 17:17:50,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-18 17:17:50,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-11-18 17:17:50,168 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 53 [2018-11-18 17:17:50,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:17:50,169 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-11-18 17:17:50,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-18 17:17:50,169 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-11-18 17:17:50,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-11-18 17:17:50,169 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:17:50,170 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:17:50,170 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:17:50,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:17:50,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1752086659, now seen corresponding path program 7 times [2018-11-18 17:17:50,170 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:17:50,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:17:50,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:50,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 17:17:50,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:17:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-11-18 17:17:50,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:17:50,257 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3dda5aa2-e34b-46e6-a826-10ce02e2c6ba/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:17:50,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:17:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:17:50,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:17:50,304 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-11-18 17:17:50,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:17:50,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-18 17:17:50,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 17:17:50,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 17:17:50,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-18 17:17:50,320 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 13 states. [2018-11-18 17:17:50,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:17:50,358 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2018-11-18 17:17:50,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 17:17:50,358 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2018-11-18 17:17:50,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:17:50,359 INFO L225 Difference]: With dead ends: 88 [2018-11-18 17:17:50,359 INFO L226 Difference]: Without dead ends: 63 [2018-11-18 17:17:50,359 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-18 17:17:50,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-18 17:17:50,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-11-18 17:17:50,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-18 17:17:50,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-11-18 17:17:50,362 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 59 [2018-11-18 17:17:50,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:17:50,362 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-11-18 17:17:50,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 17:17:50,362 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-11-18 17:17:50,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-11-18 17:17:50,363 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:17:50,363 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:17:50,363 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:17:50,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:17:50,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1963884005, now seen corresponding path program 8 times [2018-11-18 17:17:50,363 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:17:50,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:17:50,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:50,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:17:50,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:50,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:17:50,874 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-18 17:17:50,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:17:50,875 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3dda5aa2-e34b-46e6-a826-10ce02e2c6ba/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:17:50,892 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 17:17:50,925 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 17:17:50,925 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:17:50,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:17:51,194 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2018-11-18 17:17:51,196 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2018-11-18 17:17:51,197 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 17:17:51,205 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 17:17:51,206 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 17:17:51,206 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:25, output treesize:5 [2018-11-18 17:17:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 17:17:51,228 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:17:51,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 25 [2018-11-18 17:17:51,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-18 17:17:51,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-18 17:17:51,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2018-11-18 17:17:51,229 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 25 states. [2018-11-18 17:17:51,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:17:51,554 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2018-11-18 17:17:51,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-18 17:17:51,555 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 62 [2018-11-18 17:17:51,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:17:51,555 INFO L225 Difference]: With dead ends: 74 [2018-11-18 17:17:51,555 INFO L226 Difference]: Without dead ends: 66 [2018-11-18 17:17:51,556 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 55 SyntacticMatches, 8 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=1026, Unknown=0, NotChecked=0, Total=1260 [2018-11-18 17:17:51,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-18 17:17:51,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-11-18 17:17:51,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-18 17:17:51,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-11-18 17:17:51,561 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 62 [2018-11-18 17:17:51,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:17:51,561 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-11-18 17:17:51,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-18 17:17:51,562 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-11-18 17:17:51,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-18 17:17:51,562 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:17:51,562 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:17:51,563 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:17:51,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:17:51,563 INFO L82 PathProgramCache]: Analyzing trace with hash -579527896, now seen corresponding path program 9 times [2018-11-18 17:17:51,563 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:17:51,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:17:51,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:51,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 17:17:51,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:17:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-18 17:17:51,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:17:51,925 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3dda5aa2-e34b-46e6-a826-10ce02e2c6ba/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:17:51,932 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 17:17:51,982 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-18 17:17:51,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:17:51,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:17:52,039 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2018-11-18 17:17:52,041 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2018-11-18 17:17:52,041 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 17:17:52,042 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 17:17:52,043 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 17:17:52,043 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:17, output treesize:5 [2018-11-18 17:17:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-18 17:17:52,068 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:17:52,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2018-11-18 17:17:52,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-18 17:17:52,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-18 17:17:52,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2018-11-18 17:17:52,069 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 19 states. [2018-11-18 17:17:52,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:17:52,268 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2018-11-18 17:17:52,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-18 17:17:52,269 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 65 [2018-11-18 17:17:52,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:17:52,269 INFO L225 Difference]: With dead ends: 89 [2018-11-18 17:17:52,269 INFO L226 Difference]: Without dead ends: 81 [2018-11-18 17:17:52,270 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=440, Invalid=1042, Unknown=0, NotChecked=0, Total=1482 [2018-11-18 17:17:52,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-11-18 17:17:52,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-11-18 17:17:52,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-11-18 17:17:52,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-11-18 17:17:52,274 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 65 [2018-11-18 17:17:52,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:17:52,274 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-11-18 17:17:52,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-18 17:17:52,274 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-11-18 17:17:52,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-11-18 17:17:52,275 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:17:52,275 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:17:52,275 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:17:52,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:17:52,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1390601403, now seen corresponding path program 10 times [2018-11-18 17:17:52,275 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:17:52,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:17:52,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:52,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 17:17:52,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:17:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 17:17:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 17:17:52,357 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 17:17:52,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 05:17:52 BoogieIcfgContainer [2018-11-18 17:17:52,390 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 17:17:52,390 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 17:17:52,390 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 17:17:52,390 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 17:17:52,391 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 05:17:47" (3/4) ... [2018-11-18 17:17:52,392 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 17:17:52,436 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_3dda5aa2-e34b-46e6-a826-10ce02e2c6ba/bin-2019/uautomizer/witness.graphml [2018-11-18 17:17:52,436 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 17:17:52,436 INFO L168 Benchmark]: Toolchain (without parser) took 5036.91 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 332.9 MB). Free memory was 958.2 MB in the beginning and 1.1 GB in the end (delta: -142.4 MB). Peak memory consumption was 190.5 MB. Max. memory is 11.5 GB. [2018-11-18 17:17:52,437 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 17:17:52,438 INFO L168 Benchmark]: CACSL2BoogieTranslator took 161.38 ms. Allocated memory is still 1.0 GB. Free memory was 958.2 MB in the beginning and 944.7 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 11.5 GB. [2018-11-18 17:17:52,438 INFO L168 Benchmark]: Boogie Preprocessor took 62.89 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -195.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. [2018-11-18 17:17:52,438 INFO L168 Benchmark]: RCFGBuilder took 197.12 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: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2018-11-18 17:17:52,438 INFO L168 Benchmark]: TraceAbstraction took 4567.49 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 187.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 14.1 MB). Peak memory consumption was 201.8 MB. Max. memory is 11.5 GB. [2018-11-18 17:17:52,439 INFO L168 Benchmark]: Witness Printer took 45.51 ms. Allocated memory is still 1.4 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. [2018-11-18 17:17:52,440 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 161.38 ms. Allocated memory is still 1.0 GB. Free memory was 958.2 MB in the beginning and 944.7 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 62.89 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -195.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 197.12 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: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4567.49 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 187.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 14.1 MB). Peak memory consumption was 201.8 MB. Max. memory is 11.5 GB. * Witness Printer took 45.51 ms. Allocated memory is still 1.4 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 45]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] FCALL struct cont cont; [L20] FCALL struct dummy array[10]; [L21] int i, *pa; [L22] i = __VERIFIER_nondet_int() [L24] int j = 0; VAL [array={84:0}, cont={83:0}, i=8, j=0] [L24] COND TRUE j < 10 [L25] FCALL array[j].a = __VERIFIER_nondet_int() [L26] FCALL array[j].b = __VERIFIER_nondet_int() [L24] j++ VAL [array={84:0}, cont={83:0}, i=8, j=1] [L24] COND TRUE j < 10 [L25] FCALL array[j].a = __VERIFIER_nondet_int() [L26] FCALL array[j].b = __VERIFIER_nondet_int() [L24] j++ VAL [array={84:0}, cont={83:0}, i=8, j=2] [L24] COND TRUE j < 10 [L25] FCALL array[j].a = __VERIFIER_nondet_int() [L26] FCALL array[j].b = __VERIFIER_nondet_int() [L24] j++ VAL [array={84:0}, cont={83:0}, i=8, j=3] [L24] COND TRUE j < 10 [L25] FCALL array[j].a = __VERIFIER_nondet_int() [L26] FCALL array[j].b = __VERIFIER_nondet_int() [L24] j++ VAL [array={84:0}, cont={83:0}, i=8, j=4] [L24] COND TRUE j < 10 [L25] FCALL array[j].a = __VERIFIER_nondet_int() [L26] FCALL array[j].b = __VERIFIER_nondet_int() [L24] j++ VAL [array={84:0}, cont={83:0}, i=8, j=5] [L24] COND TRUE j < 10 [L25] FCALL array[j].a = __VERIFIER_nondet_int() [L26] FCALL array[j].b = __VERIFIER_nondet_int() [L24] j++ VAL [array={84:0}, cont={83:0}, i=8, j=6] [L24] COND TRUE j < 10 [L25] FCALL array[j].a = __VERIFIER_nondet_int() [L26] FCALL array[j].b = __VERIFIER_nondet_int() [L24] j++ VAL [array={84:0}, cont={83:0}, i=8, j=7] [L24] COND TRUE j < 10 [L25] FCALL array[j].a = __VERIFIER_nondet_int() [L26] FCALL array[j].b = __VERIFIER_nondet_int() [L24] j++ VAL [array={84:0}, cont={83:0}, i=8, j=8] [L24] COND TRUE j < 10 [L25] FCALL array[j].a = __VERIFIER_nondet_int() [L26] FCALL array[j].b = __VERIFIER_nondet_int() [L24] j++ VAL [array={84:0}, cont={83:0}, i=8, j=9] [L24] COND TRUE j < 10 [L25] FCALL array[j].a = __VERIFIER_nondet_int() [L26] FCALL array[j].b = __VERIFIER_nondet_int() [L24] j++ VAL [array={84:0}, cont={83:0}, i=8, j=10] [L24] COND FALSE !(j < 10) VAL [array={84:0}, cont={83:0}, i=8, j=10] [L29] COND TRUE i >= 0 && i < 9 [L30] FCALL cont.array = &array[i] [L31] EXPR, FCALL cont.array [L31] pa = &cont.array[0].b [L32] EXPR, FCALL cont.array [L32] EXPR, FCALL cont.array[0].b VAL [array={84:0}, cont={83:0}, cont.array={84:64}, cont.array[0].b=1, i=8, j=10, pa={84:68}] [L32] COND TRUE cont.array[0].b > 0 [L33] EXPR, FCALL array[i].b [L33] i = array[i].b - 10 [L34] EXPR, FCALL \read(*pa) VAL [\read(*pa)=1, array={84:0}, cont={83:0}, i=-9, j=10, pa={84:68}] [L34] COND TRUE i < *pa [L35] ++i VAL [array={84:0}, cont={83:0}, i=-8, j=10, pa={84:68}] [L34] EXPR, FCALL \read(*pa) VAL [\read(*pa)=1, array={84:0}, cont={83:0}, i=-8, j=10, pa={84:68}] [L34] COND TRUE i < *pa [L35] ++i VAL [array={84:0}, cont={83:0}, i=-7, j=10, pa={84:68}] [L34] EXPR, FCALL \read(*pa) VAL [\read(*pa)=1, array={84:0}, cont={83:0}, i=-7, j=10, pa={84:68}] [L34] COND TRUE i < *pa [L35] ++i VAL [array={84:0}, cont={83:0}, i=-6, j=10, pa={84:68}] [L34] EXPR, FCALL \read(*pa) VAL [\read(*pa)=1, array={84:0}, cont={83:0}, i=-6, j=10, pa={84:68}] [L34] COND TRUE i < *pa [L35] ++i VAL [array={84:0}, cont={83:0}, i=-5, j=10, pa={84:68}] [L34] EXPR, FCALL \read(*pa) VAL [\read(*pa)=1, array={84:0}, cont={83:0}, i=-5, j=10, pa={84:68}] [L34] COND TRUE i < *pa [L35] ++i VAL [array={84:0}, cont={83:0}, i=-4, j=10, pa={84:68}] [L34] EXPR, FCALL \read(*pa) VAL [\read(*pa)=1, array={84:0}, cont={83:0}, i=-4, j=10, pa={84:68}] [L34] COND TRUE i < *pa [L35] ++i VAL [array={84:0}, cont={83:0}, i=-3, j=10, pa={84:68}] [L34] EXPR, FCALL \read(*pa) VAL [\read(*pa)=1, array={84:0}, cont={83:0}, i=-3, j=10, pa={84:68}] [L34] COND TRUE i < *pa [L35] ++i VAL [array={84:0}, cont={83:0}, i=-2, j=10, pa={84:68}] [L34] EXPR, FCALL \read(*pa) VAL [\read(*pa)=1, array={84:0}, cont={83:0}, i=-2, j=10, pa={84:68}] [L34] COND TRUE i < *pa [L35] ++i VAL [array={84:0}, cont={83:0}, i=-1, j=10, pa={84:68}] [L34] EXPR, FCALL \read(*pa) VAL [\read(*pa)=1, array={84:0}, cont={83:0}, i=-1, j=10, pa={84:68}] [L34] COND TRUE i < *pa [L35] ++i VAL [array={84:0}, cont={83:0}, i=0, j=10, pa={84:68}] [L34] EXPR, FCALL \read(*pa) VAL [\read(*pa)=1, array={84:0}, cont={83:0}, i=0, j=10, pa={84:68}] [L34] COND TRUE i < *pa [L35] ++i VAL [array={84:0}, cont={83:0}, i=1, j=10, pa={84:68}] [L34] EXPR, FCALL \read(*pa) VAL [\read(*pa)=1, array={84:0}, cont={83:0}, i=1, j=10, pa={84:68}] [L34] COND FALSE !(i < *pa) [L37] CALL, EXPR check(&cont, i) VAL [\old(i)=1, pc={83:0}] [L14] EXPR, FCALL pc->array [L14] EXPR, FCALL pc->array[1].b [L14] RET return pc->array[1].b == i; [L37] EXPR check(&cont, i) VAL [array={84:0}, check(&cont, i)=0, cont={83:0}, i=1, j=10, pa={84:68}] [L37] COND TRUE !check(&cont, i) [L45] __VERIFIER_error() VAL [array={84:0}, cont={83:0}, i=1, j=10, pa={84:68}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. UNSAFE Result, 4.5s OverallTime, 14 OverallIterations, 11 TraceHistogramMax, 1.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 270 SDtfs, 131 SDslu, 1514 SDs, 0 SdLazy, 842 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 645 GetRequests, 473 SyntacticMatches, 13 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 9 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 1091 NumberOfCodeBlocks, 1043 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 987 ConstructedInterpolants, 14 QuantifiedInterpolants, 145536 SizeOfPredicates, 75 NumberOfNonLiveVariables, 1604 ConjunctsInSsa, 141 ConjunctsInUnsatCore, 24 InterpolantComputations, 3 PerfectInterpolantSequences, 814/1838 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...