./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular_false-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular_false-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/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 440b8f87b993409470c921154676895cb2b74b47 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 11:01:17,856 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 11:01:17,857 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 11:01:17,864 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 11:01:17,864 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 11:01:17,864 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 11:01:17,865 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 11:01:17,866 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 11:01:17,867 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 11:01:17,867 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 11:01:17,868 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 11:01:17,868 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 11:01:17,868 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 11:01:17,869 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 11:01:17,869 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 11:01:17,870 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 11:01:17,870 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 11:01:17,871 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 11:01:17,872 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 11:01:17,873 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 11:01:17,874 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 11:01:17,874 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 11:01:17,875 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 11:01:17,876 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 11:01:17,876 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 11:01:17,876 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 11:01:17,877 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 11:01:17,877 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 11:01:17,877 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 11:01:17,878 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 11:01:17,878 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 11:01:17,878 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 11:01:17,879 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 11:01:17,879 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 11:01:17,879 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 11:01:17,880 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 11:01:17,880 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-08 11:01:17,887 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 11:01:17,887 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 11:01:17,887 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 11:01:17,887 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 11:01:17,888 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-08 11:01:17,888 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-08 11:01:17,888 INFO L133 SettingsManager]: * Use SBE=true [2018-12-08 11:01:17,888 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 11:01:17,888 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 11:01:17,888 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 11:01:17,888 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 11:01:17,888 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 11:01:17,889 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 11:01:17,889 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 11:01:17,889 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 11:01:17,889 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 11:01:17,889 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 11:01:17,889 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-08 11:01:17,889 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 11:01:17,889 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 11:01:17,889 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 11:01:17,889 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 11:01:17,889 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 11:01:17,890 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 11:01:17,890 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 11:01:17,890 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 11:01:17,890 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 11:01:17,890 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-08 11:01:17,890 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 11:01:17,890 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 11:01:17,890 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_e4c7fa59-1cc0-4b85-aef2-52c219aae069/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 -> 440b8f87b993409470c921154676895cb2b74b47 [2018-12-08 11:01:17,908 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 11:01:17,917 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 11:01:17,920 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 11:01:17,921 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 11:01:17,921 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 11:01:17,921 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/../../sv-benchmarks/c/pthread/triangular_false-unreach-call.i [2018-12-08 11:01:17,958 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/data/3d6cbe421/dd2b9023a1cc48038da611f2e9288be6/FLAG26c78ec71 [2018-12-08 11:01:18,258 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 11:01:18,258 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/sv-benchmarks/c/pthread/triangular_false-unreach-call.i [2018-12-08 11:01:18,266 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/data/3d6cbe421/dd2b9023a1cc48038da611f2e9288be6/FLAG26c78ec71 [2018-12-08 11:01:18,684 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/data/3d6cbe421/dd2b9023a1cc48038da611f2e9288be6 [2018-12-08 11:01:18,686 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 11:01:18,687 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 11:01:18,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 11:01:18,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 11:01:18,690 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 11:01:18,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 11:01:18" (1/1) ... [2018-12-08 11:01:18,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e50d1e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:01:18, skipping insertion in model container [2018-12-08 11:01:18,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 11:01:18" (1/1) ... [2018-12-08 11:01:18,698 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 11:01:18,730 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 11:01:18,917 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 11:01:18,923 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 11:01:18,981 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 11:01:19,010 INFO L195 MainTranslator]: Completed translation [2018-12-08 11:01:19,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:01:19 WrapperNode [2018-12-08 11:01:19,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 11:01:19,011 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 11:01:19,011 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 11:01:19,011 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 11:01:19,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:01:19" (1/1) ... [2018-12-08 11:01:19,024 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:01:19" (1/1) ... [2018-12-08 11:01:19,036 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 11:01:19,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 11:01:19,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 11:01:19,037 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 11:01:19,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:01:19" (1/1) ... [2018-12-08 11:01:19,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:01:19" (1/1) ... [2018-12-08 11:01:19,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:01:19" (1/1) ... [2018-12-08 11:01:19,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:01:19" (1/1) ... [2018-12-08 11:01:19,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:01:19" (1/1) ... [2018-12-08 11:01:19,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:01:19" (1/1) ... [2018-12-08 11:01:19,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:01:19" (1/1) ... [2018-12-08 11:01:19,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 11:01:19,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 11:01:19,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 11:01:19,052 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 11:01:19,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:01:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 11:01:19,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-08 11:01:19,087 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2018-12-08 11:01:19,088 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2018-12-08 11:01:19,088 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2018-12-08 11:01:19,088 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2018-12-08 11:01:19,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-08 11:01:19,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2018-12-08 11:01:19,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-08 11:01:19,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2018-12-08 11:01:19,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 11:01:19,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 11:01:19,089 WARN L198 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2018-12-08 11:01:19,224 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 11:01:19,224 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-12-08 11:01:19,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 11:01:19 BoogieIcfgContainer [2018-12-08 11:01:19,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 11:01:19,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 11:01:19,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 11:01:19,227 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 11:01:19,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 11:01:18" (1/3) ... [2018-12-08 11:01:19,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5071267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 11:01:19, skipping insertion in model container [2018-12-08 11:01:19,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:01:19" (2/3) ... [2018-12-08 11:01:19,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5071267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 11:01:19, skipping insertion in model container [2018-12-08 11:01:19,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 11:01:19" (3/3) ... [2018-12-08 11:01:19,228 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular_false-unreach-call.i [2018-12-08 11:01:19,248 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,248 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,248 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,248 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,249 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,249 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,249 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,249 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,249 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,250 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,250 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,250 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,250 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,250 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,251 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,251 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,251 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,251 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,251 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,251 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,252 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,252 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,252 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,252 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,252 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,253 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,253 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,253 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 11:01:19,259 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-12-08 11:01:19,259 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 11:01:19,264 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-08 11:01:19,273 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-08 11:01:19,287 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-08 11:01:19,287 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 11:01:19,287 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 11:01:19,287 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 11:01:19,287 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 11:01:19,287 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 11:01:19,287 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 11:01:19,287 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 11:01:19,287 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 11:01:19,292 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46places, 48 transitions [2018-12-08 11:01:19,329 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2018-12-08 11:01:19,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2018-12-08 11:01:19,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-08 11:01:19,338 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:01:19,338 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:01:19,340 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 11:01:19,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:01:19,343 INFO L82 PathProgramCache]: Analyzing trace with hash 573491188, now seen corresponding path program 1 times [2018-12-08 11:01:19,344 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:01:19,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:01:19,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:19,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 11:01:19,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:01:19,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:19,490 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 11:01:19,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 11:01:19,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 11:01:19,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 11:01:19,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-08 11:01:19,502 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2018-12-08 11:01:19,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:01:19,561 INFO L93 Difference]: Finished difference Result 1411 states and 4051 transitions. [2018-12-08 11:01:19,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 11:01:19,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-12-08 11:01:19,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:01:19,571 INFO L225 Difference]: With dead ends: 1411 [2018-12-08 11:01:19,571 INFO L226 Difference]: Without dead ends: 322 [2018-12-08 11:01:19,572 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-08 11:01:19,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2018-12-08 11:01:19,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2018-12-08 11:01:19,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-12-08 11:01:19,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 820 transitions. [2018-12-08 11:01:19,605 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 820 transitions. Word has length 19 [2018-12-08 11:01:19,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:01:19,606 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 820 transitions. [2018-12-08 11:01:19,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 11:01:19,606 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 820 transitions. [2018-12-08 11:01:19,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-08 11:01:19,607 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:01:19,607 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:01:19,607 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 11:01:19,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:01:19,607 INFO L82 PathProgramCache]: Analyzing trace with hash -143811728, now seen corresponding path program 1 times [2018-12-08 11:01:19,607 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:01:19,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:01:19,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:19,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 11:01:19,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:01:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:19,658 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 11:01:19,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 11:01:19,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 11:01:19,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 11:01:19,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-08 11:01:19,660 INFO L87 Difference]: Start difference. First operand 322 states and 820 transitions. Second operand 5 states. [2018-12-08 11:01:19,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:01:19,698 INFO L93 Difference]: Finished difference Result 411 states and 998 transitions. [2018-12-08 11:01:19,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 11:01:19,698 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-12-08 11:01:19,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:01:19,700 INFO L225 Difference]: With dead ends: 411 [2018-12-08 11:01:19,700 INFO L226 Difference]: Without dead ends: 290 [2018-12-08 11:01:19,701 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-08 11:01:19,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-12-08 11:01:19,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2018-12-08 11:01:19,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-12-08 11:01:19,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2018-12-08 11:01:19,713 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2018-12-08 11:01:19,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:01:19,713 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2018-12-08 11:01:19,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 11:01:19,713 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2018-12-08 11:01:19,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-08 11:01:19,714 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:01:19,714 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:01:19,714 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 11:01:19,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:01:19,715 INFO L82 PathProgramCache]: Analyzing trace with hash 28324926, now seen corresponding path program 1 times [2018-12-08 11:01:19,715 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:01:19,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:01:19,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:19,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 11:01:19,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:01:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:19,764 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 11:01:19,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-08 11:01:19,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 11:01:19,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 11:01:19,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-08 11:01:19,765 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2018-12-08 11:01:19,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:01:19,804 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2018-12-08 11:01:19,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 11:01:19,805 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-08 11:01:19,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:01:19,806 INFO L225 Difference]: With dead ends: 437 [2018-12-08 11:01:19,806 INFO L226 Difference]: Without dead ends: 309 [2018-12-08 11:01:19,807 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-08 11:01:19,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-12-08 11:01:19,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 299. [2018-12-08 11:01:19,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-12-08 11:01:19,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 732 transitions. [2018-12-08 11:01:19,816 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 732 transitions. Word has length 25 [2018-12-08 11:01:19,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:01:19,817 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 732 transitions. [2018-12-08 11:01:19,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 11:01:19,817 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 732 transitions. [2018-12-08 11:01:19,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-08 11:01:19,818 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:01:19,818 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:01:19,818 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 11:01:19,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:01:19,818 INFO L82 PathProgramCache]: Analyzing trace with hash 19387626, now seen corresponding path program 2 times [2018-12-08 11:01:19,819 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:01:19,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:01:19,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:19,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 11:01:19,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:01:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:19,867 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 11:01:19,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-08 11:01:19,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 11:01:19,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 11:01:19,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-08 11:01:19,868 INFO L87 Difference]: Start difference. First operand 299 states and 732 transitions. Second operand 6 states. [2018-12-08 11:01:19,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:01:19,911 INFO L93 Difference]: Finished difference Result 456 states and 1095 transitions. [2018-12-08 11:01:19,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 11:01:19,911 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-08 11:01:19,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:01:19,912 INFO L225 Difference]: With dead ends: 456 [2018-12-08 11:01:19,912 INFO L226 Difference]: Without dead ends: 319 [2018-12-08 11:01:19,912 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-08 11:01:19,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-12-08 11:01:19,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-12-08 11:01:19,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-12-08 11:01:19,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2018-12-08 11:01:19,918 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2018-12-08 11:01:19,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:01:19,918 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2018-12-08 11:01:19,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 11:01:19,918 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2018-12-08 11:01:19,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-08 11:01:19,919 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:01:19,919 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:01:19,919 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 11:01:19,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:01:19,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1592611961, now seen corresponding path program 1 times [2018-12-08 11:01:19,919 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:01:19,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:01:19,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:19,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 11:01:19,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:01:19,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:19,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 11:01:19,968 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 11:01:19,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 11:01:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:01:19,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 11:01:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:20,061 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 11:01:20,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-12-08 11:01:20,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-08 11:01:20,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-08 11:01:20,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-12-08 11:01:20,062 INFO L87 Difference]: Start difference. First operand 319 states and 772 transitions. Second operand 8 states. [2018-12-08 11:01:20,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:01:20,131 INFO L93 Difference]: Finished difference Result 466 states and 1115 transitions. [2018-12-08 11:01:20,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-08 11:01:20,132 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-12-08 11:01:20,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:01:20,134 INFO L225 Difference]: With dead ends: 466 [2018-12-08 11:01:20,134 INFO L226 Difference]: Without dead ends: 335 [2018-12-08 11:01:20,134 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-12-08 11:01:20,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-12-08 11:01:20,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 300. [2018-12-08 11:01:20,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2018-12-08 11:01:20,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 734 transitions. [2018-12-08 11:01:20,143 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 734 transitions. Word has length 29 [2018-12-08 11:01:20,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:01:20,143 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 734 transitions. [2018-12-08 11:01:20,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-08 11:01:20,143 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 734 transitions. [2018-12-08 11:01:20,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-08 11:01:20,144 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:01:20,144 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:01:20,145 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 11:01:20,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:01:20,145 INFO L82 PathProgramCache]: Analyzing trace with hash 2035666861, now seen corresponding path program 1 times [2018-12-08 11:01:20,145 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:01:20,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:01:20,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:20,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 11:01:20,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:01:20,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:20,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 11:01:20,191 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 11:01:20,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 11:01:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:01:20,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 11:01:20,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:20,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 11:01:20,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-12-08 11:01:20,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-08 11:01:20,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-08 11:01:20,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-12-08 11:01:20,257 INFO L87 Difference]: Start difference. First operand 300 states and 734 transitions. Second operand 8 states. [2018-12-08 11:01:20,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:01:20,308 INFO L93 Difference]: Finished difference Result 482 states and 1147 transitions. [2018-12-08 11:01:20,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-08 11:01:20,309 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-12-08 11:01:20,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:01:20,310 INFO L225 Difference]: With dead ends: 482 [2018-12-08 11:01:20,310 INFO L226 Difference]: Without dead ends: 351 [2018-12-08 11:01:20,310 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-12-08 11:01:20,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-12-08 11:01:20,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-12-08 11:01:20,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-12-08 11:01:20,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 836 transitions. [2018-12-08 11:01:20,316 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 836 transitions. Word has length 29 [2018-12-08 11:01:20,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:01:20,316 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 836 transitions. [2018-12-08 11:01:20,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-08 11:01:20,317 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 836 transitions. [2018-12-08 11:01:20,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-08 11:01:20,317 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:01:20,317 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:01:20,318 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 11:01:20,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:01:20,318 INFO L82 PathProgramCache]: Analyzing trace with hash -460714038, now seen corresponding path program 1 times [2018-12-08 11:01:20,318 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:01:20,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:01:20,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:20,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 11:01:20,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:01:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:20,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 11:01:20,375 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 11:01:20,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 11:01:20,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:01:20,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 11:01:20,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:20,436 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 11:01:20,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-12-08 11:01:20,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 11:01:20,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 11:01:20,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-12-08 11:01:20,437 INFO L87 Difference]: Start difference. First operand 351 states and 836 transitions. Second operand 9 states. [2018-12-08 11:01:20,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:01:20,508 INFO L93 Difference]: Finished difference Result 498 states and 1179 transitions. [2018-12-08 11:01:20,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-08 11:01:20,509 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-12-08 11:01:20,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:01:20,510 INFO L225 Difference]: With dead ends: 498 [2018-12-08 11:01:20,510 INFO L226 Difference]: Without dead ends: 367 [2018-12-08 11:01:20,511 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-12-08 11:01:20,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-12-08 11:01:20,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 316. [2018-12-08 11:01:20,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-12-08 11:01:20,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 766 transitions. [2018-12-08 11:01:20,518 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 766 transitions. Word has length 33 [2018-12-08 11:01:20,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:01:20,519 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 766 transitions. [2018-12-08 11:01:20,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 11:01:20,519 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 766 transitions. [2018-12-08 11:01:20,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-08 11:01:20,519 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:01:20,519 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:01:20,520 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 11:01:20,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:01:20,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1110322378, now seen corresponding path program 2 times [2018-12-08 11:01:20,520 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:01:20,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:01:20,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:20,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 11:01:20,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:01:20,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:20,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 11:01:20,577 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 11:01:20,587 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 11:01:20,600 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 11:01:20,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 11:01:20,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 11:01:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:20,658 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 11:01:20,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-12-08 11:01:20,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 11:01:20,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 11:01:20,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-12-08 11:01:20,659 INFO L87 Difference]: Start difference. First operand 316 states and 766 transitions. Second operand 9 states. [2018-12-08 11:01:20,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:01:20,730 INFO L93 Difference]: Finished difference Result 514 states and 1211 transitions. [2018-12-08 11:01:20,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-08 11:01:20,730 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-12-08 11:01:20,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:01:20,732 INFO L225 Difference]: With dead ends: 514 [2018-12-08 11:01:20,732 INFO L226 Difference]: Without dead ends: 383 [2018-12-08 11:01:20,732 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-12-08 11:01:20,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-12-08 11:01:20,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2018-12-08 11:01:20,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-12-08 11:01:20,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 900 transitions. [2018-12-08 11:01:20,739 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 900 transitions. Word has length 33 [2018-12-08 11:01:20,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:01:20,740 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 900 transitions. [2018-12-08 11:01:20,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 11:01:20,740 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 900 transitions. [2018-12-08 11:01:20,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-08 11:01:20,741 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:01:20,741 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:01:20,741 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 11:01:20,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:01:20,741 INFO L82 PathProgramCache]: Analyzing trace with hash 2061178471, now seen corresponding path program 3 times [2018-12-08 11:01:20,741 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:01:20,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:01:20,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:20,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 11:01:20,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:01:20,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:20,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 11:01:20,794 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 11:01:20,801 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 11:01:20,813 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-08 11:01:20,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 11:01:20,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 11:01:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:20,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 11:01:20,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-12-08 11:01:20,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-08 11:01:20,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-08 11:01:20,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-12-08 11:01:20,846 INFO L87 Difference]: Start difference. First operand 383 states and 900 transitions. Second operand 10 states. [2018-12-08 11:01:20,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:01:20,946 INFO L93 Difference]: Finished difference Result 530 states and 1243 transitions. [2018-12-08 11:01:20,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-08 11:01:20,946 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-12-08 11:01:20,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:01:20,947 INFO L225 Difference]: With dead ends: 530 [2018-12-08 11:01:20,947 INFO L226 Difference]: Without dead ends: 399 [2018-12-08 11:01:20,948 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2018-12-08 11:01:20,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-12-08 11:01:20,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 332. [2018-12-08 11:01:20,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2018-12-08 11:01:20,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 798 transitions. [2018-12-08 11:01:20,952 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 798 transitions. Word has length 37 [2018-12-08 11:01:20,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:01:20,952 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 798 transitions. [2018-12-08 11:01:20,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-08 11:01:20,952 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 798 transitions. [2018-12-08 11:01:20,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-08 11:01:20,953 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:01:20,953 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:01:20,953 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 11:01:20,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:01:20,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1649592435, now seen corresponding path program 4 times [2018-12-08 11:01:20,953 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:01:20,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:01:20,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:20,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 11:01:20,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:20,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:01:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:20,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 11:01:20,995 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 11:01:21,002 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 11:01:21,013 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 11:01:21,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 11:01:21,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 11:01:21,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:21,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 11:01:21,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-12-08 11:01:21,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-08 11:01:21,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-08 11:01:21,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-12-08 11:01:21,050 INFO L87 Difference]: Start difference. First operand 332 states and 798 transitions. Second operand 10 states. [2018-12-08 11:01:21,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:01:21,108 INFO L93 Difference]: Finished difference Result 546 states and 1275 transitions. [2018-12-08 11:01:21,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-08 11:01:21,108 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-12-08 11:01:21,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:01:21,109 INFO L225 Difference]: With dead ends: 546 [2018-12-08 11:01:21,109 INFO L226 Difference]: Without dead ends: 415 [2018-12-08 11:01:21,109 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2018-12-08 11:01:21,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2018-12-08 11:01:21,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2018-12-08 11:01:21,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2018-12-08 11:01:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 964 transitions. [2018-12-08 11:01:21,113 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 964 transitions. Word has length 37 [2018-12-08 11:01:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:01:21,113 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 964 transitions. [2018-12-08 11:01:21,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-08 11:01:21,114 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 964 transitions. [2018-12-08 11:01:21,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-08 11:01:21,114 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:01:21,114 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:01:21,114 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 11:01:21,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:01:21,115 INFO L82 PathProgramCache]: Analyzing trace with hash 2086800042, now seen corresponding path program 5 times [2018-12-08 11:01:21,115 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:01:21,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:01:21,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:21,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 11:01:21,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:21,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:01:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:21,163 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 11:01:21,163 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 11:01:21,171 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 11:01:21,183 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-12-08 11:01:21,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 11:01:21,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 11:01:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:21,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 11:01:21,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-12-08 11:01:21,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-08 11:01:21,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 11:01:21,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-12-08 11:01:21,213 INFO L87 Difference]: Start difference. First operand 415 states and 964 transitions. Second operand 11 states. [2018-12-08 11:01:21,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:01:21,296 INFO L93 Difference]: Finished difference Result 562 states and 1307 transitions. [2018-12-08 11:01:21,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-08 11:01:21,297 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-12-08 11:01:21,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:01:21,297 INFO L225 Difference]: With dead ends: 562 [2018-12-08 11:01:21,298 INFO L226 Difference]: Without dead ends: 431 [2018-12-08 11:01:21,298 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2018-12-08 11:01:21,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-12-08 11:01:21,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 348. [2018-12-08 11:01:21,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2018-12-08 11:01:21,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 830 transitions. [2018-12-08 11:01:21,301 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 830 transitions. Word has length 41 [2018-12-08 11:01:21,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:01:21,301 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 830 transitions. [2018-12-08 11:01:21,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-08 11:01:21,302 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 830 transitions. [2018-12-08 11:01:21,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-08 11:01:21,302 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:01:21,302 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:01:21,302 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 11:01:21,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:01:21,302 INFO L82 PathProgramCache]: Analyzing trace with hash 449750186, now seen corresponding path program 6 times [2018-12-08 11:01:21,302 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:01:21,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:01:21,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:21,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 11:01:21,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:21,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:01:21,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:21,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 11:01:21,346 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 11:01:21,354 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 11:01:21,367 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-12-08 11:01:21,367 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 11:01:21,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 11:01:21,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:21,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 11:01:21,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-12-08 11:01:21,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-08 11:01:21,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 11:01:21,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-12-08 11:01:21,416 INFO L87 Difference]: Start difference. First operand 348 states and 830 transitions. Second operand 11 states. [2018-12-08 11:01:21,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:01:21,494 INFO L93 Difference]: Finished difference Result 578 states and 1339 transitions. [2018-12-08 11:01:21,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-08 11:01:21,494 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-12-08 11:01:21,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:01:21,495 INFO L225 Difference]: With dead ends: 578 [2018-12-08 11:01:21,495 INFO L226 Difference]: Without dead ends: 447 [2018-12-08 11:01:21,495 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2018-12-08 11:01:21,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-12-08 11:01:21,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2018-12-08 11:01:21,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-12-08 11:01:21,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1028 transitions. [2018-12-08 11:01:21,499 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1028 transitions. Word has length 41 [2018-12-08 11:01:21,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:01:21,499 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1028 transitions. [2018-12-08 11:01:21,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-08 11:01:21,499 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1028 transitions. [2018-12-08 11:01:21,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-08 11:01:21,500 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:01:21,500 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:01:21,500 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 11:01:21,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:01:21,500 INFO L82 PathProgramCache]: Analyzing trace with hash 511353159, now seen corresponding path program 7 times [2018-12-08 11:01:21,500 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:01:21,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:01:21,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:21,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 11:01:21,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:01:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:21,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 11:01:21,573 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 11:01:21,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 11:01:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:01:21,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 11:01:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:21,637 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 11:01:21,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-12-08 11:01:21,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-08 11:01:21,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-08 11:01:21,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-12-08 11:01:21,637 INFO L87 Difference]: Start difference. First operand 447 states and 1028 transitions. Second operand 12 states. [2018-12-08 11:01:21,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:01:21,751 INFO L93 Difference]: Finished difference Result 594 states and 1371 transitions. [2018-12-08 11:01:21,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-08 11:01:21,751 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-12-08 11:01:21,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:01:21,752 INFO L225 Difference]: With dead ends: 594 [2018-12-08 11:01:21,752 INFO L226 Difference]: Without dead ends: 463 [2018-12-08 11:01:21,753 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2018-12-08 11:01:21,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2018-12-08 11:01:21,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 364. [2018-12-08 11:01:21,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-12-08 11:01:21,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 862 transitions. [2018-12-08 11:01:21,757 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 862 transitions. Word has length 45 [2018-12-08 11:01:21,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:01:21,757 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 862 transitions. [2018-12-08 11:01:21,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-08 11:01:21,757 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 862 transitions. [2018-12-08 11:01:21,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-08 11:01:21,757 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:01:21,758 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:01:21,758 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 11:01:21,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:01:21,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1081163923, now seen corresponding path program 8 times [2018-12-08 11:01:21,758 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:01:21,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:01:21,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:21,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 11:01:21,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:01:21,808 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:21,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 11:01:21,809 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 11:01:21,816 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 11:01:21,828 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 11:01:21,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 11:01:21,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 11:01:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:21,866 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 11:01:21,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-12-08 11:01:21,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-08 11:01:21,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-08 11:01:21,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-12-08 11:01:21,867 INFO L87 Difference]: Start difference. First operand 364 states and 862 transitions. Second operand 12 states. [2018-12-08 11:01:21,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:01:21,975 INFO L93 Difference]: Finished difference Result 610 states and 1403 transitions. [2018-12-08 11:01:21,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-08 11:01:21,976 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-12-08 11:01:21,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:01:21,977 INFO L225 Difference]: With dead ends: 610 [2018-12-08 11:01:21,977 INFO L226 Difference]: Without dead ends: 479 [2018-12-08 11:01:21,977 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2018-12-08 11:01:21,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-12-08 11:01:21,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2018-12-08 11:01:21,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-12-08 11:01:21,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1092 transitions. [2018-12-08 11:01:21,983 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1092 transitions. Word has length 45 [2018-12-08 11:01:21,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:01:21,983 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 1092 transitions. [2018-12-08 11:01:21,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-08 11:01:21,983 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1092 transitions. [2018-12-08 11:01:21,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-08 11:01:21,984 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:01:21,984 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:01:21,984 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 11:01:21,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:01:21,984 INFO L82 PathProgramCache]: Analyzing trace with hash -578738806, now seen corresponding path program 9 times [2018-12-08 11:01:21,984 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:01:21,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:01:21,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:21,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 11:01:21,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:01:22,071 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:22,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 11:01:22,072 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 11:01:22,079 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 11:01:22,093 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-08 11:01:22,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 11:01:22,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 11:01:22,134 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:22,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 11:01:22,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-12-08 11:01:22,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-08 11:01:22,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-08 11:01:22,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-12-08 11:01:22,150 INFO L87 Difference]: Start difference. First operand 479 states and 1092 transitions. Second operand 13 states. [2018-12-08 11:01:22,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:01:22,262 INFO L93 Difference]: Finished difference Result 626 states and 1435 transitions. [2018-12-08 11:01:22,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-08 11:01:22,263 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-12-08 11:01:22,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:01:22,264 INFO L225 Difference]: With dead ends: 626 [2018-12-08 11:01:22,264 INFO L226 Difference]: Without dead ends: 495 [2018-12-08 11:01:22,264 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2018-12-08 11:01:22,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-12-08 11:01:22,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 380. [2018-12-08 11:01:22,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2018-12-08 11:01:22,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 894 transitions. [2018-12-08 11:01:22,269 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 894 transitions. Word has length 49 [2018-12-08 11:01:22,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:01:22,270 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 894 transitions. [2018-12-08 11:01:22,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-08 11:01:22,270 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 894 transitions. [2018-12-08 11:01:22,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-08 11:01:22,270 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:01:22,270 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:01:22,271 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 11:01:22,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:01:22,271 INFO L82 PathProgramCache]: Analyzing trace with hash -555139958, now seen corresponding path program 10 times [2018-12-08 11:01:22,271 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:01:22,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:01:22,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:22,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 11:01:22,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:01:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:22,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 11:01:22,333 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 11:01:22,343 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 11:01:22,355 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 11:01:22,355 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 11:01:22,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 11:01:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:22,408 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 11:01:22,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-12-08 11:01:22,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-08 11:01:22,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-08 11:01:22,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-12-08 11:01:22,409 INFO L87 Difference]: Start difference. First operand 380 states and 894 transitions. Second operand 13 states. [2018-12-08 11:01:22,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:01:22,518 INFO L93 Difference]: Finished difference Result 642 states and 1467 transitions. [2018-12-08 11:01:22,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-08 11:01:22,518 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-12-08 11:01:22,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:01:22,520 INFO L225 Difference]: With dead ends: 642 [2018-12-08 11:01:22,520 INFO L226 Difference]: Without dead ends: 511 [2018-12-08 11:01:22,520 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2018-12-08 11:01:22,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2018-12-08 11:01:22,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2018-12-08 11:01:22,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2018-12-08 11:01:22,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1156 transitions. [2018-12-08 11:01:22,524 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1156 transitions. Word has length 49 [2018-12-08 11:01:22,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:01:22,525 INFO L480 AbstractCegarLoop]: Abstraction has 511 states and 1156 transitions. [2018-12-08 11:01:22,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-08 11:01:22,525 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1156 transitions. [2018-12-08 11:01:22,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-08 11:01:22,525 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:01:22,525 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:01:22,526 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 11:01:22,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:01:22,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1389448231, now seen corresponding path program 11 times [2018-12-08 11:01:22,526 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:01:22,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:01:22,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:22,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 11:01:22,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:22,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:01:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:22,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 11:01:22,584 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 11:01:22,591 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 11:01:22,604 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-12-08 11:01:22,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 11:01:22,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 11:01:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:22,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 11:01:22,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-12-08 11:01:22,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-08 11:01:22,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-08 11:01:22,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-12-08 11:01:22,638 INFO L87 Difference]: Start difference. First operand 511 states and 1156 transitions. Second operand 14 states. [2018-12-08 11:01:22,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:01:22,783 INFO L93 Difference]: Finished difference Result 658 states and 1499 transitions. [2018-12-08 11:01:22,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-08 11:01:22,783 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-12-08 11:01:22,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:01:22,784 INFO L225 Difference]: With dead ends: 658 [2018-12-08 11:01:22,785 INFO L226 Difference]: Without dead ends: 527 [2018-12-08 11:01:22,785 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2018-12-08 11:01:22,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2018-12-08 11:01:22,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 396. [2018-12-08 11:01:22,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2018-12-08 11:01:22,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 926 transitions. [2018-12-08 11:01:22,790 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 926 transitions. Word has length 53 [2018-12-08 11:01:22,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:01:22,790 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 926 transitions. [2018-12-08 11:01:22,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-08 11:01:22,790 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 926 transitions. [2018-12-08 11:01:22,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-08 11:01:22,791 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:01:22,791 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:01:22,791 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 11:01:22,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:01:22,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1121609549, now seen corresponding path program 12 times [2018-12-08 11:01:22,791 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:01:22,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:01:22,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:22,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 11:01:22,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:22,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:01:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:22,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 11:01:22,854 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 11:01:22,863 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 11:01:22,880 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-12-08 11:01:22,880 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 11:01:22,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 11:01:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:22,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 11:01:22,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-12-08 11:01:22,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-08 11:01:22,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-08 11:01:22,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-12-08 11:01:22,950 INFO L87 Difference]: Start difference. First operand 396 states and 926 transitions. Second operand 14 states. [2018-12-08 11:01:23,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:01:23,073 INFO L93 Difference]: Finished difference Result 674 states and 1531 transitions. [2018-12-08 11:01:23,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-08 11:01:23,073 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-12-08 11:01:23,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:01:23,074 INFO L225 Difference]: With dead ends: 674 [2018-12-08 11:01:23,074 INFO L226 Difference]: Without dead ends: 543 [2018-12-08 11:01:23,074 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2018-12-08 11:01:23,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-12-08 11:01:23,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2018-12-08 11:01:23,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2018-12-08 11:01:23,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1220 transitions. [2018-12-08 11:01:23,079 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1220 transitions. Word has length 53 [2018-12-08 11:01:23,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:01:23,079 INFO L480 AbstractCegarLoop]: Abstraction has 543 states and 1220 transitions. [2018-12-08 11:01:23,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-08 11:01:23,079 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1220 transitions. [2018-12-08 11:01:23,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-08 11:01:23,080 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:01:23,080 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:01:23,080 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 11:01:23,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:01:23,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1590124650, now seen corresponding path program 13 times [2018-12-08 11:01:23,080 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:01:23,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:01:23,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:23,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 11:01:23,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:01:23,163 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:23,163 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 11:01:23,163 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 11:01:23,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 11:01:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 11:01:23,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 11:01:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 11:01:23,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 11:01:23,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-12-08 11:01:23,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-08 11:01:23,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-08 11:01:23,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-12-08 11:01:23,230 INFO L87 Difference]: Start difference. First operand 543 states and 1220 transitions. Second operand 15 states. [2018-12-08 11:01:23,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 11:01:23,365 INFO L93 Difference]: Finished difference Result 690 states and 1563 transitions. [2018-12-08 11:01:23,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-08 11:01:23,366 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-12-08 11:01:23,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 11:01:23,367 INFO L225 Difference]: With dead ends: 690 [2018-12-08 11:01:23,368 INFO L226 Difference]: Without dead ends: 559 [2018-12-08 11:01:23,368 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2018-12-08 11:01:23,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2018-12-08 11:01:23,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 412. [2018-12-08 11:01:23,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-12-08 11:01:23,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 958 transitions. [2018-12-08 11:01:23,372 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 958 transitions. Word has length 57 [2018-12-08 11:01:23,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 11:01:23,373 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 958 transitions. [2018-12-08 11:01:23,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-08 11:01:23,373 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 958 transitions. [2018-12-08 11:01:23,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-08 11:01:23,373 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 11:01:23,373 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 11:01:23,373 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 11:01:23,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 11:01:23,373 INFO L82 PathProgramCache]: Analyzing trace with hash 39711850, now seen corresponding path program 14 times [2018-12-08 11:01:23,373 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 11:01:23,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 11:01:23,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:23,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 11:01:23,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 11:01:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 11:01:23,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 11:01:23,406 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-08 11:01:23,438 INFO L305 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-12-08 11:01:23,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 11:01:23 BasicIcfg [2018-12-08 11:01:23,439 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 11:01:23,439 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 11:01:23,439 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 11:01:23,440 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 11:01:23,440 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 11:01:19" (3/4) ... [2018-12-08 11:01:23,442 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-08 11:01:23,481 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_e4c7fa59-1cc0-4b85-aef2-52c219aae069/bin-2019/uautomizer/witness.graphml [2018-12-08 11:01:23,481 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 11:01:23,482 INFO L168 Benchmark]: Toolchain (without parser) took 4795.95 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 320.3 MB). Free memory was 956.0 MB in the beginning and 919.5 MB in the end (delta: 36.5 MB). Peak memory consumption was 356.9 MB. Max. memory is 11.5 GB. [2018-12-08 11:01:23,483 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 11:01:23,483 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 956.0 MB in the beginning and 1.1 GB in the end (delta: -149.6 MB). Peak memory consumption was 30.4 MB. Max. memory is 11.5 GB. [2018-12-08 11:01:23,484 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.58 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 11:01:23,484 INFO L168 Benchmark]: Boogie Preprocessor took 15.44 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 11:01:23,484 INFO L168 Benchmark]: RCFGBuilder took 172.02 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: 24.6 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. [2018-12-08 11:01:23,484 INFO L168 Benchmark]: TraceAbstraction took 4214.36 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 189.3 MB). Free memory was 1.1 GB in the beginning and 928.6 MB in the end (delta: 152.4 MB). Peak memory consumption was 341.7 MB. Max. memory is 11.5 GB. [2018-12-08 11:01:23,485 INFO L168 Benchmark]: Witness Printer took 42.25 ms. Allocated memory is still 1.3 GB. Free memory was 928.6 MB in the beginning and 919.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 11.5 GB. [2018-12-08 11:01:23,487 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 323.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 956.0 MB in the beginning and 1.1 GB in the end (delta: -149.6 MB). Peak memory consumption was 30.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 25.58 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.44 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 172.02 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: 24.6 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4214.36 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 189.3 MB). Free memory was 1.1 GB in the beginning and 928.6 MB in the end (delta: 152.4 MB). Peak memory consumption was 341.7 MB. Max. memory is 11.5 GB. * Witness Printer took 42.25 ms. Allocated memory is still 1.3 GB. Free memory was 928.6 MB in the beginning and 919.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 688]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L660] -1 int i = 3, j = 6; VAL [i=3, j=6] [L678] -1 pthread_t id1, id2; VAL [i=3, j=6] [L679] FCALL, FORK -1 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L662] 0 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L680] FCALL, FORK -1 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L670] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L662] COND TRUE 0 k < 5 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L670] COND TRUE 1 k < 5 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=0] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L662] COND TRUE 0 k < 5 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L670] COND TRUE 1 k < 5 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=1] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L662] COND TRUE 0 k < 5 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L670] COND TRUE 1 k < 5 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=2] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L662] COND TRUE 0 k < 5 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L670] COND TRUE 1 k < 5 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=3] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L662] COND TRUE 0 k < 5 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L670] COND TRUE 1 k < 5 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L682] -1 int condI = i >= (2*5 +6); [L685] -1 int condJ = j >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L687] COND TRUE -1 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L688] -1 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 64 locations, 1 error locations. UNSAFE Result, 4.1s OverallTime, 20 OverallIterations, 5 TraceHistogramMax, 1.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1038 SDtfs, 3615 SDslu, 4258 SDs, 0 SdLazy, 854 SolverSat, 411 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 905 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1012occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 19 MinimizatonAttempts, 738 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 1410 NumberOfCodeBlocks, 1410 NumberOfCodeBlocksAsserted, 56 NumberOfCheckSat, 1319 ConstructedInterpolants, 0 QuantifiedInterpolants, 167867 SizeOfPredicates, 139 NumberOfNonLiveVariables, 1682 ConjunctsInSsa, 187 ConjunctsInUnsatCore, 34 InterpolantComputations, 4 PerfectInterpolantSequences, 0/576 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...