./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular_true-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular_true-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/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 58249a19aaa2ca34edeb532954b326c7f760e66f ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 09:27:00,628 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 09:27:00,630 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 09:27:00,638 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 09:27:00,638 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 09:27:00,639 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 09:27:00,640 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 09:27:00,641 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 09:27:00,642 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 09:27:00,643 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 09:27:00,644 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 09:27:00,644 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 09:27:00,645 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 09:27:00,645 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 09:27:00,646 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 09:27:00,647 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 09:27:00,647 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 09:27:00,649 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 09:27:00,650 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 09:27:00,651 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 09:27:00,652 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 09:27:00,652 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 09:27:00,654 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 09:27:00,654 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 09:27:00,654 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 09:27:00,655 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 09:27:00,656 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 09:27:00,656 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 09:27:00,657 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 09:27:00,657 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 09:27:00,658 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 09:27:00,658 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 09:27:00,658 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 09:27:00,658 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 09:27:00,659 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 09:27:00,659 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 09:27:00,660 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-23 09:27:00,669 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 09:27:00,669 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 09:27:00,670 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 09:27:00,670 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 09:27:00,671 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 09:27:00,671 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 09:27:00,671 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 09:27:00,671 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 09:27:00,671 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 09:27:00,671 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 09:27:00,671 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 09:27:00,671 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 09:27:00,672 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 09:27:00,672 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 09:27:00,672 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 09:27:00,672 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 09:27:00,672 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 09:27:00,672 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 09:27:00,672 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 09:27:00,672 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 09:27:00,673 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 09:27:00,673 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 09:27:00,673 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 09:27:00,673 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 09:27:00,673 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 09:27:00,673 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 09:27:00,673 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 09:27:00,674 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 09:27:00,674 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 09:27:00,674 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 09:27:00,674 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_d075c971-b9a9-4755-9881-91d21ddf98c3/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 -> 58249a19aaa2ca34edeb532954b326c7f760e66f [2018-11-23 09:27:00,697 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 09:27:00,706 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 09:27:00,709 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 09:27:00,710 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 09:27:00,710 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 09:27:00,711 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/bin-2019/uautomizer/../../sv-benchmarks/c/pthread/triangular_true-unreach-call.i [2018-11-23 09:27:00,756 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/bin-2019/uautomizer/data/65099e71b/84c1dc0fcecf4c7a90c6bfddd4e567f4/FLAGa469f924d [2018-11-23 09:27:01,128 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 09:27:01,129 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/sv-benchmarks/c/pthread/triangular_true-unreach-call.i [2018-11-23 09:27:01,136 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/bin-2019/uautomizer/data/65099e71b/84c1dc0fcecf4c7a90c6bfddd4e567f4/FLAGa469f924d [2018-11-23 09:27:01,522 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/bin-2019/uautomizer/data/65099e71b/84c1dc0fcecf4c7a90c6bfddd4e567f4 [2018-11-23 09:27:01,524 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 09:27:01,525 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 09:27:01,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 09:27:01,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 09:27:01,528 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 09:27:01,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:27:01" (1/1) ... [2018-11-23 09:27:01,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d49566f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:01, skipping insertion in model container [2018-11-23 09:27:01,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:27:01" (1/1) ... [2018-11-23 09:27:01,538 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 09:27:01,570 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 09:27:01,774 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 09:27:01,780 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 09:27:01,866 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 09:27:01,904 INFO L195 MainTranslator]: Completed translation [2018-11-23 09:27:01,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:01 WrapperNode [2018-11-23 09:27:01,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 09:27:01,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 09:27:01,905 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 09:27:01,905 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 09:27:01,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:01" (1/1) ... [2018-11-23 09:27:01,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:01" (1/1) ... [2018-11-23 09:27:01,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 09:27:01,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 09:27:01,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 09:27:01,935 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 09:27:01,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:01" (1/1) ... [2018-11-23 09:27:01,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:01" (1/1) ... [2018-11-23 09:27:01,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:01" (1/1) ... [2018-11-23 09:27:01,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:01" (1/1) ... [2018-11-23 09:27:01,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:01" (1/1) ... [2018-11-23 09:27:01,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:01" (1/1) ... [2018-11-23 09:27:01,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:01" (1/1) ... [2018-11-23 09:27:01,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 09:27:01,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 09:27:01,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 09:27:01,954 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 09:27:01,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 09:27:01,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-23 09:27:01,994 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2018-11-23 09:27:01,994 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2018-11-23 09:27:01,994 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2018-11-23 09:27:01,995 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2018-11-23 09:27:01,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-23 09:27:01,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2018-11-23 09:27:01,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-23 09:27:01,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2018-11-23 09:27:01,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 09:27:01,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 09:27:01,996 WARN L198 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2018-11-23 09:27:02,239 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 09:27:02,240 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-11-23 09:27:02,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:27:02 BoogieIcfgContainer [2018-11-23 09:27:02,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 09:27:02,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 09:27:02,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 09:27:02,243 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 09:27:02,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:27:01" (1/3) ... [2018-11-23 09:27:02,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b74526e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:27:02, skipping insertion in model container [2018-11-23 09:27:02,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:01" (2/3) ... [2018-11-23 09:27:02,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b74526e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:27:02, skipping insertion in model container [2018-11-23 09:27:02,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:27:02" (3/3) ... [2018-11-23 09:27:02,245 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular_true-unreach-call.i [2018-11-23 09:27:02,268 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,268 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,268 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,268 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,268 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,269 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,269 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,269 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,269 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,269 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,269 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,270 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,270 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,270 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,270 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,270 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,270 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,270 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,271 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,271 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,271 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,271 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,271 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,271 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,271 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,272 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,272 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,272 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 09:27:02,277 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-11-23 09:27:02,277 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 09:27:02,284 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 09:27:02,296 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 09:27:02,314 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 09:27:02,315 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 09:27:02,315 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 09:27:02,315 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 09:27:02,315 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 09:27:02,315 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 09:27:02,315 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 09:27:02,315 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 09:27:02,316 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 09:27:02,322 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46places, 48 transitions [2018-11-23 09:27:02,373 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2018-11-23 09:27:02,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2018-11-23 09:27:02,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-23 09:27:02,384 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:27:02,384 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 09:27:02,386 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:27:02,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:27:02,390 INFO L82 PathProgramCache]: Analyzing trace with hash 573491188, now seen corresponding path program 1 times [2018-11-23 09:27:02,392 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:27:02,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:27:02,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:02,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:27:02,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:02,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:02,580 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 09:27:02,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 09:27:02,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 09:27:02,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 09:27:02,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-23 09:27:02,594 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2018-11-23 09:27:02,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:27:02,696 INFO L93 Difference]: Finished difference Result 1411 states and 4051 transitions. [2018-11-23 09:27:02,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 09:27:02,698 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-11-23 09:27:02,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:27:02,713 INFO L225 Difference]: With dead ends: 1411 [2018-11-23 09:27:02,713 INFO L226 Difference]: Without dead ends: 322 [2018-11-23 09:27:02,714 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 [2018-11-23 09:27:02,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2018-11-23 09:27:02,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2018-11-23 09:27:02,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-11-23 09:27:02,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 820 transitions. [2018-11-23 09:27:02,764 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 820 transitions. Word has length 19 [2018-11-23 09:27:02,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:27:02,764 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 820 transitions. [2018-11-23 09:27:02,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 09:27:02,765 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 820 transitions. [2018-11-23 09:27:02,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-23 09:27:02,766 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:27:02,766 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] [2018-11-23 09:27:02,766 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:27:02,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:27:02,767 INFO L82 PathProgramCache]: Analyzing trace with hash -158111408, now seen corresponding path program 1 times [2018-11-23 09:27:02,767 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:27:02,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:27:02,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:02,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:27:02,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:02,852 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 09:27:02,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 09:27:02,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 09:27:02,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 09:27:02,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-23 09:27:02,854 INFO L87 Difference]: Start difference. First operand 322 states and 820 transitions. Second operand 5 states. [2018-11-23 09:27:02,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:27:02,898 INFO L93 Difference]: Finished difference Result 411 states and 998 transitions. [2018-11-23 09:27:02,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 09:27:02,899 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-11-23 09:27:02,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:27:02,901 INFO L225 Difference]: With dead ends: 411 [2018-11-23 09:27:02,901 INFO L226 Difference]: Without dead ends: 290 [2018-11-23 09:27:02,902 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 [2018-11-23 09:27:02,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-11-23 09:27:02,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2018-11-23 09:27:02,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-11-23 09:27:02,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2018-11-23 09:27:02,916 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2018-11-23 09:27:02,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:27:02,917 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2018-11-23 09:27:02,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 09:27:02,917 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2018-11-23 09:27:02,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-23 09:27:02,918 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:27:02,918 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] [2018-11-23 09:27:02,920 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:27:02,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:27:02,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1832836244, now seen corresponding path program 1 times [2018-11-23 09:27:02,920 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:27:02,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:27:02,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:02,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:27:02,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:02,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:02,990 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 09:27:02,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-23 09:27:02,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 09:27:02,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 09:27:02,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-23 09:27:02,991 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2018-11-23 09:27:03,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:27:03,056 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2018-11-23 09:27:03,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 09:27:03,059 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-11-23 09:27:03,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:27:03,061 INFO L225 Difference]: With dead ends: 437 [2018-11-23 09:27:03,061 INFO L226 Difference]: Without dead ends: 300 [2018-11-23 09:27:03,061 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 [2018-11-23 09:27:03,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2018-11-23 09:27:03,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 287. [2018-11-23 09:27:03,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-11-23 09:27:03,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 708 transitions. [2018-11-23 09:27:03,075 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 708 transitions. Word has length 25 [2018-11-23 09:27:03,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:27:03,076 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 708 transitions. [2018-11-23 09:27:03,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 09:27:03,076 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 708 transitions. [2018-11-23 09:27:03,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-23 09:27:03,077 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:27:03,077 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] [2018-11-23 09:27:03,079 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:27:03,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:27:03,079 INFO L82 PathProgramCache]: Analyzing trace with hash 28324926, now seen corresponding path program 2 times [2018-11-23 09:27:03,079 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:27:03,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:27:03,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:03,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:27:03,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:03,152 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 09:27:03,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-23 09:27:03,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 09:27:03,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 09:27:03,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-23 09:27:03,153 INFO L87 Difference]: Start difference. First operand 287 states and 708 transitions. Second operand 6 states. [2018-11-23 09:27:03,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:27:03,207 INFO L93 Difference]: Finished difference Result 447 states and 1077 transitions. [2018-11-23 09:27:03,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 09:27:03,208 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-11-23 09:27:03,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:27:03,212 INFO L225 Difference]: With dead ends: 447 [2018-11-23 09:27:03,212 INFO L226 Difference]: Without dead ends: 319 [2018-11-23 09:27:03,213 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 [2018-11-23 09:27:03,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-11-23 09:27:03,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-11-23 09:27:03,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-11-23 09:27:03,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2018-11-23 09:27:03,222 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2018-11-23 09:27:03,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:27:03,223 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2018-11-23 09:27:03,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 09:27:03,223 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2018-11-23 09:27:03,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-23 09:27:03,224 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:27:03,224 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] [2018-11-23 09:27:03,225 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:27:03,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:27:03,225 INFO L82 PathProgramCache]: Analyzing trace with hash -390066897, now seen corresponding path program 1 times [2018-11-23 09:27:03,225 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:27:03,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:27:03,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:03,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 09:27:03,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:03,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:27:03,285 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 09:27:03,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:27:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:03,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:27:03,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:03,394 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 09:27:03,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-23 09:27:03,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-23 09:27:03,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-23 09:27:03,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-23 09:27:03,395 INFO L87 Difference]: Start difference. First operand 319 states and 772 transitions. Second operand 8 states. [2018-11-23 09:27:03,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:27:03,466 INFO L93 Difference]: Finished difference Result 466 states and 1115 transitions. [2018-11-23 09:27:03,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 09:27:03,467 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-11-23 09:27:03,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:27:03,468 INFO L225 Difference]: With dead ends: 466 [2018-11-23 09:27:03,468 INFO L226 Difference]: Without dead ends: 335 [2018-11-23 09:27:03,469 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 [2018-11-23 09:27:03,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-11-23 09:27:03,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 297. [2018-11-23 09:27:03,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2018-11-23 09:27:03,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 728 transitions. [2018-11-23 09:27:03,477 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 728 transitions. Word has length 29 [2018-11-23 09:27:03,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:27:03,477 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 728 transitions. [2018-11-23 09:27:03,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-23 09:27:03,477 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 728 transitions. [2018-11-23 09:27:03,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-23 09:27:03,478 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:27:03,478 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] [2018-11-23 09:27:03,479 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:27:03,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:27:03,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1592611961, now seen corresponding path program 1 times [2018-11-23 09:27:03,479 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:27:03,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:27:03,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:03,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:27:03,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:03,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:03,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:03,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:27:03,551 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 09:27:03,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:27:03,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:03,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:27:03,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:03,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 09:27:03,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-23 09:27:03,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-23 09:27:03,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-23 09:27:03,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-23 09:27:03,640 INFO L87 Difference]: Start difference. First operand 297 states and 728 transitions. Second operand 8 states. [2018-11-23 09:27:03,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:27:03,746 INFO L93 Difference]: Finished difference Result 482 states and 1147 transitions. [2018-11-23 09:27:03,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-23 09:27:03,746 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-11-23 09:27:03,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:27:03,748 INFO L225 Difference]: With dead ends: 482 [2018-11-23 09:27:03,748 INFO L226 Difference]: Without dead ends: 351 [2018-11-23 09:27:03,748 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 [2018-11-23 09:27:03,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-11-23 09:27:03,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-11-23 09:27:03,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-11-23 09:27:03,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 836 transitions. [2018-11-23 09:27:03,759 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 836 transitions. Word has length 29 [2018-11-23 09:27:03,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:27:03,759 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 836 transitions. [2018-11-23 09:27:03,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-23 09:27:03,759 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 836 transitions. [2018-11-23 09:27:03,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-23 09:27:03,760 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:27:03,760 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] [2018-11-23 09:27:03,761 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:27:03,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:27:03,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1331288396, now seen corresponding path program 1 times [2018-11-23 09:27:03,761 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:27:03,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:27:03,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:03,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:27:03,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:03,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:27:03,856 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 09:27:03,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:27:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:03,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:27:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:03,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 09:27:03,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-23 09:27:03,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-23 09:27:03,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 09:27:03,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-11-23 09:27:03,951 INFO L87 Difference]: Start difference. First operand 351 states and 836 transitions. Second operand 9 states. [2018-11-23 09:27:04,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:27:04,064 INFO L93 Difference]: Finished difference Result 498 states and 1179 transitions. [2018-11-23 09:27:04,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 09:27:04,064 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-11-23 09:27:04,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:27:04,066 INFO L225 Difference]: With dead ends: 498 [2018-11-23 09:27:04,066 INFO L226 Difference]: Without dead ends: 367 [2018-11-23 09:27:04,067 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-11-23 09:27:04,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-11-23 09:27:04,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 313. [2018-11-23 09:27:04,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2018-11-23 09:27:04,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 760 transitions. [2018-11-23 09:27:04,076 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 760 transitions. Word has length 33 [2018-11-23 09:27:04,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:27:04,076 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 760 transitions. [2018-11-23 09:27:04,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-23 09:27:04,077 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 760 transitions. [2018-11-23 09:27:04,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-23 09:27:04,077 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:27:04,078 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] [2018-11-23 09:27:04,078 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:27:04,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:27:04,078 INFO L82 PathProgramCache]: Analyzing trace with hash -460714038, now seen corresponding path program 2 times [2018-11-23 09:27:04,078 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:27:04,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:27:04,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:04,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:27:04,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:04,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:27:04,144 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 09:27:04,166 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 09:27:04,185 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 09:27:04,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 09:27:04,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:27:04,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:04,264 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 09:27:04,264 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-23 09:27:04,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-23 09:27:04,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 09:27:04,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-11-23 09:27:04,265 INFO L87 Difference]: Start difference. First operand 313 states and 760 transitions. Second operand 9 states. [2018-11-23 09:27:04,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:27:04,412 INFO L93 Difference]: Finished difference Result 514 states and 1211 transitions. [2018-11-23 09:27:04,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 09:27:04,413 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-11-23 09:27:04,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:27:04,414 INFO L225 Difference]: With dead ends: 514 [2018-11-23 09:27:04,414 INFO L226 Difference]: Without dead ends: 383 [2018-11-23 09:27:04,415 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-11-23 09:27:04,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-11-23 09:27:04,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2018-11-23 09:27:04,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-11-23 09:27:04,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 900 transitions. [2018-11-23 09:27:04,424 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 900 transitions. Word has length 33 [2018-11-23 09:27:04,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:27:04,424 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 900 transitions. [2018-11-23 09:27:04,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-23 09:27:04,424 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 900 transitions. [2018-11-23 09:27:04,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-23 09:27:04,425 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:27:04,425 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] [2018-11-23 09:27:04,428 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:27:04,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:27:04,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1672817905, now seen corresponding path program 3 times [2018-11-23 09:27:04,428 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:27:04,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:27:04,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:04,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 09:27:04,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:04,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:04,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:27:04,499 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 09:27:04,520 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 09:27:04,539 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-23 09:27:04,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 09:27:04,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:27:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:04,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 09:27:04,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-23 09:27:04,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-23 09:27:04,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-23 09:27:04,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-11-23 09:27:04,593 INFO L87 Difference]: Start difference. First operand 383 states and 900 transitions. Second operand 10 states. [2018-11-23 09:27:04,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:27:04,708 INFO L93 Difference]: Finished difference Result 530 states and 1243 transitions. [2018-11-23 09:27:04,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-23 09:27:04,708 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-11-23 09:27:04,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:27:04,709 INFO L225 Difference]: With dead ends: 530 [2018-11-23 09:27:04,709 INFO L226 Difference]: Without dead ends: 399 [2018-11-23 09:27:04,710 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2018-11-23 09:27:04,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-11-23 09:27:04,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 329. [2018-11-23 09:27:04,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2018-11-23 09:27:04,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 792 transitions. [2018-11-23 09:27:04,714 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 792 transitions. Word has length 37 [2018-11-23 09:27:04,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:27:04,714 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 792 transitions. [2018-11-23 09:27:04,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-23 09:27:04,714 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 792 transitions. [2018-11-23 09:27:04,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-23 09:27:04,715 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:27:04,715 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] [2018-11-23 09:27:04,715 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:27:04,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:27:04,716 INFO L82 PathProgramCache]: Analyzing trace with hash 2061178471, now seen corresponding path program 4 times [2018-11-23 09:27:04,716 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:27:04,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:27:04,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:04,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 09:27:04,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:04,778 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:27:04,778 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 09:27:04,797 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 09:27:04,815 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 09:27:04,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 09:27:04,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:27:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:04,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 09:27:04,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-23 09:27:04,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-23 09:27:04,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-23 09:27:04,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-11-23 09:27:04,853 INFO L87 Difference]: Start difference. First operand 329 states and 792 transitions. Second operand 10 states. [2018-11-23 09:27:04,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:27:04,953 INFO L93 Difference]: Finished difference Result 546 states and 1275 transitions. [2018-11-23 09:27:04,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-23 09:27:04,954 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-11-23 09:27:04,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:27:04,955 INFO L225 Difference]: With dead ends: 546 [2018-11-23 09:27:04,955 INFO L226 Difference]: Without dead ends: 415 [2018-11-23 09:27:04,955 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2018-11-23 09:27:04,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2018-11-23 09:27:04,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2018-11-23 09:27:04,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2018-11-23 09:27:04,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 964 transitions. [2018-11-23 09:27:04,963 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 964 transitions. Word has length 37 [2018-11-23 09:27:04,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:27:04,964 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 964 transitions. [2018-11-23 09:27:04,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-23 09:27:04,964 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 964 transitions. [2018-11-23 09:27:04,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-23 09:27:04,965 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:27:04,965 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] [2018-11-23 09:27:04,965 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:27:04,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:27:04,965 INFO L82 PathProgramCache]: Analyzing trace with hash 307146540, now seen corresponding path program 5 times [2018-11-23 09:27:04,965 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:27:04,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:27:04,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:04,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 09:27:04,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:05,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:27:05,049 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 09:27:05,070 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 09:27:05,090 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-11-23 09:27:05,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 09:27:05,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:27:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:05,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 09:27:05,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-23 09:27:05,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-23 09:27:05,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 09:27:05,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-23 09:27:05,133 INFO L87 Difference]: Start difference. First operand 415 states and 964 transitions. Second operand 11 states. [2018-11-23 09:27:05,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:27:05,274 INFO L93 Difference]: Finished difference Result 562 states and 1307 transitions. [2018-11-23 09:27:05,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-23 09:27:05,275 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-11-23 09:27:05,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:27:05,276 INFO L225 Difference]: With dead ends: 562 [2018-11-23 09:27:05,276 INFO L226 Difference]: Without dead ends: 431 [2018-11-23 09:27:05,277 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2018-11-23 09:27:05,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-11-23 09:27:05,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 345. [2018-11-23 09:27:05,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2018-11-23 09:27:05,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 824 transitions. [2018-11-23 09:27:05,286 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 824 transitions. Word has length 41 [2018-11-23 09:27:05,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:27:05,287 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 824 transitions. [2018-11-23 09:27:05,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-23 09:27:05,287 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 824 transitions. [2018-11-23 09:27:05,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-23 09:27:05,288 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:27:05,288 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] [2018-11-23 09:27:05,288 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:27:05,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:27:05,288 INFO L82 PathProgramCache]: Analyzing trace with hash 2086800042, now seen corresponding path program 6 times [2018-11-23 09:27:05,288 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:27:05,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:27:05,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:05,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 09:27:05,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:05,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:05,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:27:05,374 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 09:27:05,381 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 09:27:05,400 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-11-23 09:27:05,400 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 09:27:05,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:27:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:05,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 09:27:05,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-23 09:27:05,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-23 09:27:05,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 09:27:05,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-23 09:27:05,439 INFO L87 Difference]: Start difference. First operand 345 states and 824 transitions. Second operand 11 states. [2018-11-23 09:27:05,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:27:05,526 INFO L93 Difference]: Finished difference Result 578 states and 1339 transitions. [2018-11-23 09:27:05,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-23 09:27:05,527 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-11-23 09:27:05,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:27:05,529 INFO L225 Difference]: With dead ends: 578 [2018-11-23 09:27:05,529 INFO L226 Difference]: Without dead ends: 447 [2018-11-23 09:27:05,529 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-11-23 09:27:05,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-11-23 09:27:05,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2018-11-23 09:27:05,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-11-23 09:27:05,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1028 transitions. [2018-11-23 09:27:05,538 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1028 transitions. Word has length 41 [2018-11-23 09:27:05,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:27:05,539 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1028 transitions. [2018-11-23 09:27:05,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-23 09:27:05,539 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1028 transitions. [2018-11-23 09:27:05,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-23 09:27:05,539 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:27:05,540 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] [2018-11-23 09:27:05,540 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:27:05,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:27:05,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1960724241, now seen corresponding path program 7 times [2018-11-23 09:27:05,540 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:27:05,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:27:05,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:05,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 09:27:05,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:05,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:05,609 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:05,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:27:05,609 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 09:27:05,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:27:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:05,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:27:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:05,684 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 09:27:05,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-23 09:27:05,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-23 09:27:05,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-23 09:27:05,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-11-23 09:27:05,685 INFO L87 Difference]: Start difference. First operand 447 states and 1028 transitions. Second operand 12 states. [2018-11-23 09:27:05,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:27:05,823 INFO L93 Difference]: Finished difference Result 594 states and 1371 transitions. [2018-11-23 09:27:05,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-23 09:27:05,824 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-11-23 09:27:05,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:27:05,825 INFO L225 Difference]: With dead ends: 594 [2018-11-23 09:27:05,825 INFO L226 Difference]: Without dead ends: 463 [2018-11-23 09:27:05,825 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2018-11-23 09:27:05,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2018-11-23 09:27:05,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 361. [2018-11-23 09:27:05,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2018-11-23 09:27:05,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 856 transitions. [2018-11-23 09:27:05,832 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 856 transitions. Word has length 45 [2018-11-23 09:27:05,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:27:05,833 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 856 transitions. [2018-11-23 09:27:05,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-23 09:27:05,833 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 856 transitions. [2018-11-23 09:27:05,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-23 09:27:05,833 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:27:05,833 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] [2018-11-23 09:27:05,834 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:27:05,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:27:05,834 INFO L82 PathProgramCache]: Analyzing trace with hash 511353159, now seen corresponding path program 8 times [2018-11-23 09:27:05,834 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:27:05,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:27:05,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:05,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:27:05,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:05,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:27:05,905 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 09:27:05,922 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 09:27:05,945 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 09:27:05,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 09:27:05,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:27:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:06,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 09:27:06,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-23 09:27:06,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-23 09:27:06,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-23 09:27:06,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-11-23 09:27:06,008 INFO L87 Difference]: Start difference. First operand 361 states and 856 transitions. Second operand 12 states. [2018-11-23 09:27:06,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:27:06,146 INFO L93 Difference]: Finished difference Result 610 states and 1403 transitions. [2018-11-23 09:27:06,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-23 09:27:06,147 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-11-23 09:27:06,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:27:06,148 INFO L225 Difference]: With dead ends: 610 [2018-11-23 09:27:06,148 INFO L226 Difference]: Without dead ends: 479 [2018-11-23 09:27:06,149 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2018-11-23 09:27:06,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-11-23 09:27:06,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2018-11-23 09:27:06,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-11-23 09:27:06,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1092 transitions. [2018-11-23 09:27:06,154 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1092 transitions. Word has length 45 [2018-11-23 09:27:06,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:27:06,155 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 1092 transitions. [2018-11-23 09:27:06,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-23 09:27:06,155 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1092 transitions. [2018-11-23 09:27:06,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-23 09:27:06,156 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:27:06,156 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] [2018-11-23 09:27:06,156 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:27:06,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:27:06,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1300210956, now seen corresponding path program 9 times [2018-11-23 09:27:06,156 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:27:06,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:27:06,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:06,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 09:27:06,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:06,221 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:06,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:27:06,222 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 09:27:06,253 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 09:27:06,266 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-23 09:27:06,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 09:27:06,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:27:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:06,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 09:27:06,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-23 09:27:06,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-23 09:27:06,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-23 09:27:06,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-11-23 09:27:06,305 INFO L87 Difference]: Start difference. First operand 479 states and 1092 transitions. Second operand 13 states. [2018-11-23 09:27:06,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:27:06,441 INFO L93 Difference]: Finished difference Result 626 states and 1435 transitions. [2018-11-23 09:27:06,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-23 09:27:06,450 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-11-23 09:27:06,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:27:06,452 INFO L225 Difference]: With dead ends: 626 [2018-11-23 09:27:06,452 INFO L226 Difference]: Without dead ends: 495 [2018-11-23 09:27:06,453 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 [2018-11-23 09:27:06,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-11-23 09:27:06,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 377. [2018-11-23 09:27:06,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2018-11-23 09:27:06,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 888 transitions. [2018-11-23 09:27:06,461 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 888 transitions. Word has length 49 [2018-11-23 09:27:06,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:27:06,461 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 888 transitions. [2018-11-23 09:27:06,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-23 09:27:06,461 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 888 transitions. [2018-11-23 09:27:06,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-23 09:27:06,462 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:27:06,462 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] [2018-11-23 09:27:06,462 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:27:06,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:27:06,465 INFO L82 PathProgramCache]: Analyzing trace with hash -578738806, now seen corresponding path program 10 times [2018-11-23 09:27:06,465 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:27:06,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:27:06,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:06,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 09:27:06,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:06,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:27:06,555 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/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 [2018-11-23 09:27:06,575 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 09:27:06,588 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 09:27:06,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 09:27:06,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:27:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:06,631 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 09:27:06,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-23 09:27:06,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-23 09:27:06,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-23 09:27:06,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-11-23 09:27:06,632 INFO L87 Difference]: Start difference. First operand 377 states and 888 transitions. Second operand 13 states. [2018-11-23 09:27:06,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:27:06,823 INFO L93 Difference]: Finished difference Result 642 states and 1467 transitions. [2018-11-23 09:27:06,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-23 09:27:06,823 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-11-23 09:27:06,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:27:06,824 INFO L225 Difference]: With dead ends: 642 [2018-11-23 09:27:06,824 INFO L226 Difference]: Without dead ends: 511 [2018-11-23 09:27:06,825 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2018-11-23 09:27:06,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2018-11-23 09:27:06,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2018-11-23 09:27:06,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2018-11-23 09:27:06,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1156 transitions. [2018-11-23 09:27:06,832 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1156 transitions. Word has length 49 [2018-11-23 09:27:06,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:27:06,832 INFO L480 AbstractCegarLoop]: Abstraction has 511 states and 1156 transitions. [2018-11-23 09:27:06,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-23 09:27:06,833 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1156 transitions. [2018-11-23 09:27:06,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-23 09:27:06,833 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:27:06,833 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] [2018-11-23 09:27:06,834 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:27:06,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:27:06,834 INFO L82 PathProgramCache]: Analyzing trace with hash 925155023, now seen corresponding path program 11 times [2018-11-23 09:27:06,834 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:27:06,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:27:06,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:06,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 09:27:06,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:07,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:27:07,091 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/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 [2018-11-23 09:27:07,107 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 09:27:07,125 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-11-23 09:27:07,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 09:27:07,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:27:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:07,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 09:27:07,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-11-23 09:27:07,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-23 09:27:07,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-23 09:27:07,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-11-23 09:27:07,218 INFO L87 Difference]: Start difference. First operand 511 states and 1156 transitions. Second operand 14 states. [2018-11-23 09:27:07,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:27:07,344 INFO L93 Difference]: Finished difference Result 658 states and 1499 transitions. [2018-11-23 09:27:07,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-23 09:27:07,345 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-11-23 09:27:07,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:27:07,346 INFO L225 Difference]: With dead ends: 658 [2018-11-23 09:27:07,346 INFO L226 Difference]: Without dead ends: 527 [2018-11-23 09:27:07,347 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2018-11-23 09:27:07,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2018-11-23 09:27:07,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 393. [2018-11-23 09:27:07,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2018-11-23 09:27:07,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 920 transitions. [2018-11-23 09:27:07,355 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 920 transitions. Word has length 53 [2018-11-23 09:27:07,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:27:07,355 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 920 transitions. [2018-11-23 09:27:07,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-23 09:27:07,355 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 920 transitions. [2018-11-23 09:27:07,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-23 09:27:07,356 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:27:07,356 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] [2018-11-23 09:27:07,356 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:27:07,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:27:07,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1389448231, now seen corresponding path program 12 times [2018-11-23 09:27:07,357 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:27:07,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:27:07,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:07,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 09:27:07,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:07,440 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:07,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:27:07,440 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/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 [2018-11-23 09:27:07,448 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 09:27:07,464 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-11-23 09:27:07,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 09:27:07,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:27:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:07,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 09:27:07,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-11-23 09:27:07,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-23 09:27:07,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-23 09:27:07,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-11-23 09:27:07,500 INFO L87 Difference]: Start difference. First operand 393 states and 920 transitions. Second operand 14 states. [2018-11-23 09:27:07,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:27:07,629 INFO L93 Difference]: Finished difference Result 674 states and 1531 transitions. [2018-11-23 09:27:07,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-23 09:27:07,629 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-11-23 09:27:07,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:27:07,630 INFO L225 Difference]: With dead ends: 674 [2018-11-23 09:27:07,630 INFO L226 Difference]: Without dead ends: 543 [2018-11-23 09:27:07,630 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2018-11-23 09:27:07,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-11-23 09:27:07,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2018-11-23 09:27:07,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2018-11-23 09:27:07,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1220 transitions. [2018-11-23 09:27:07,637 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1220 transitions. Word has length 53 [2018-11-23 09:27:07,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:27:07,637 INFO L480 AbstractCegarLoop]: Abstraction has 543 states and 1220 transitions. [2018-11-23 09:27:07,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-23 09:27:07,637 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1220 transitions. [2018-11-23 09:27:07,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-23 09:27:07,638 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:27:07,638 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] [2018-11-23 09:27:07,638 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:27:07,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:27:07,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1832076564, now seen corresponding path program 13 times [2018-11-23 09:27:07,639 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:27:07,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:27:07,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:07,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 09:27:07,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:07,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:07,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:27:07,734 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/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 [2018-11-23 09:27:07,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:27:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:07,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:27:07,786 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:07,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 09:27:07,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-11-23 09:27:07,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-23 09:27:07,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-23 09:27:07,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-11-23 09:27:07,803 INFO L87 Difference]: Start difference. First operand 543 states and 1220 transitions. Second operand 15 states. [2018-11-23 09:27:07,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:27:07,925 INFO L93 Difference]: Finished difference Result 690 states and 1563 transitions. [2018-11-23 09:27:07,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-23 09:27:07,926 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-11-23 09:27:07,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:27:07,927 INFO L225 Difference]: With dead ends: 690 [2018-11-23 09:27:07,927 INFO L226 Difference]: Without dead ends: 559 [2018-11-23 09:27:07,927 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2018-11-23 09:27:07,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2018-11-23 09:27:07,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 409. [2018-11-23 09:27:07,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2018-11-23 09:27:07,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 952 transitions. [2018-11-23 09:27:07,931 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 952 transitions. Word has length 57 [2018-11-23 09:27:07,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:27:07,931 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 952 transitions. [2018-11-23 09:27:07,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-23 09:27:07,931 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 952 transitions. [2018-11-23 09:27:07,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-23 09:27:07,932 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:27:07,932 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] [2018-11-23 09:27:07,932 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:27:07,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:27:07,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1590124650, now seen corresponding path program 14 times [2018-11-23 09:27:07,932 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:27:07,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:27:07,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:07,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:27:07,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:08,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:27:08,028 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 09:27:08,041 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 09:27:08,066 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 09:27:08,066 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 09:27:08,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:27:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:08,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 09:27:08,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-11-23 09:27:08,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-23 09:27:08,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-23 09:27:08,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-11-23 09:27:08,112 INFO L87 Difference]: Start difference. First operand 409 states and 952 transitions. Second operand 15 states. [2018-11-23 09:27:08,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:27:08,266 INFO L93 Difference]: Finished difference Result 706 states and 1595 transitions. [2018-11-23 09:27:08,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-23 09:27:08,266 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-11-23 09:27:08,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:27:08,267 INFO L225 Difference]: With dead ends: 706 [2018-11-23 09:27:08,268 INFO L226 Difference]: Without dead ends: 575 [2018-11-23 09:27:08,268 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2018-11-23 09:27:08,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2018-11-23 09:27:08,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2018-11-23 09:27:08,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2018-11-23 09:27:08,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1284 transitions. [2018-11-23 09:27:08,272 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1284 transitions. Word has length 57 [2018-11-23 09:27:08,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:27:08,273 INFO L480 AbstractCegarLoop]: Abstraction has 575 states and 1284 transitions. [2018-11-23 09:27:08,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-23 09:27:08,273 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1284 transitions. [2018-11-23 09:27:08,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-23 09:27:08,274 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:27:08,274 INFO L402 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 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] [2018-11-23 09:27:08,274 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:27:08,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:27:08,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1110697135, now seen corresponding path program 15 times [2018-11-23 09:27:08,274 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:27:08,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:27:08,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:08,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 09:27:08,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 47 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:08,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:27:08,376 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 09:27:08,384 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 09:27:08,417 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-23 09:27:08,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 09:27:08,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:27:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:08,468 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-23 09:27:08,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2018-11-23 09:27:08,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-23 09:27:08,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-23 09:27:08,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-11-23 09:27:08,469 INFO L87 Difference]: Start difference. First operand 575 states and 1284 transitions. Second operand 15 states. [2018-11-23 09:27:08,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:27:08,579 INFO L93 Difference]: Finished difference Result 1247 states and 2519 transitions. [2018-11-23 09:27:08,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-23 09:27:08,580 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2018-11-23 09:27:08,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:27:08,581 INFO L225 Difference]: With dead ends: 1247 [2018-11-23 09:27:08,581 INFO L226 Difference]: Without dead ends: 395 [2018-11-23 09:27:08,582 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2018-11-23 09:27:08,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2018-11-23 09:27:08,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2018-11-23 09:27:08,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2018-11-23 09:27:08,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 870 transitions. [2018-11-23 09:27:08,586 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 870 transitions. Word has length 61 [2018-11-23 09:27:08,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:27:08,586 INFO L480 AbstractCegarLoop]: Abstraction has 395 states and 870 transitions. [2018-11-23 09:27:08,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-23 09:27:08,586 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 870 transitions. [2018-11-23 09:27:08,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-23 09:27:08,587 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:27:08,587 INFO L402 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 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] [2018-11-23 09:27:08,587 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 09:27:08,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:27:08,588 INFO L82 PathProgramCache]: Analyzing trace with hash -21031161, now seen corresponding path program 16 times [2018-11-23 09:27:08,588 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:27:08,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:27:08,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:08,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 09:27:08,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:27:08,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:27:08,658 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 60 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:08,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:27:08,659 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 09:27:08,682 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 09:27:08,706 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 09:27:08,707 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 09:27:08,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:27:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:27:08,762 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-23 09:27:08,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2018-11-23 09:27:08,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-23 09:27:08,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-23 09:27:08,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-11-23 09:27:08,763 INFO L87 Difference]: Start difference. First operand 395 states and 870 transitions. Second operand 15 states. [2018-11-23 09:27:08,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:27:08,868 INFO L93 Difference]: Finished difference Result 503 states and 885 transitions. [2018-11-23 09:27:08,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-23 09:27:08,868 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2018-11-23 09:27:08,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 09:27:08,868 INFO L225 Difference]: With dead ends: 503 [2018-11-23 09:27:08,868 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 09:27:08,869 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2018-11-23 09:27:08,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 09:27:08,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 09:27:08,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 09:27:08,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 09:27:08,870 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 61 [2018-11-23 09:27:08,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 09:27:08,870 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 09:27:08,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-23 09:27:08,870 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 09:27:08,870 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 09:27:08,873 INFO L305 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-11-23 09:27:08,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 09:27:08 BasicIcfg [2018-11-23 09:27:08,875 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 09:27:08,875 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 09:27:08,875 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 09:27:08,876 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 09:27:08,876 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:27:02" (3/4) ... [2018-11-23 09:27:08,880 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 09:27:08,887 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2018-11-23 09:27:08,887 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2018-11-23 09:27:08,890 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-11-23 09:27:08,890 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-23 09:27:08,890 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 09:27:08,921 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_d075c971-b9a9-4755-9881-91d21ddf98c3/bin-2019/uautomizer/witness.graphml [2018-11-23 09:27:08,921 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 09:27:08,922 INFO L168 Benchmark]: Toolchain (without parser) took 7397.92 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 332.9 MB). Free memory was 956.4 MB in the beginning and 1.1 GB in the end (delta: -193.5 MB). Peak memory consumption was 139.5 MB. Max. memory is 11.5 GB. [2018-11-23 09:27:08,923 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 09:27:08,923 INFO L168 Benchmark]: CACSL2BoogieTranslator took 379.32 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 161.5 MB). Free memory was 956.4 MB in the beginning and 1.1 GB in the end (delta: -185.8 MB). Peak memory consumption was 34.3 MB. Max. memory is 11.5 GB. [2018-11-23 09:27:08,924 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.87 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: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2018-11-23 09:27:08,924 INFO L168 Benchmark]: Boogie Preprocessor took 18.92 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 09:27:08,924 INFO L168 Benchmark]: RCFGBuilder took 286.17 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: 21.3 MB). Peak memory consumption was 21.3 MB. Max. memory is 11.5 GB. [2018-11-23 09:27:08,924 INFO L168 Benchmark]: TraceAbstraction took 6634.34 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 171.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -43.2 MB). Peak memory consumption was 128.2 MB. Max. memory is 11.5 GB. [2018-11-23 09:27:08,925 INFO L168 Benchmark]: Witness Printer took 46.26 ms. Allocated memory is still 1.4 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 7.5 MB). Peak memory consumption was 7.5 MB. Max. memory is 11.5 GB. [2018-11-23 09:27:08,926 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 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 379.32 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 161.5 MB). Free memory was 956.4 MB in the beginning and 1.1 GB in the end (delta: -185.8 MB). Peak memory consumption was 34.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.87 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: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.92 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 286.17 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: 21.3 MB). Peak memory consumption was 21.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6634.34 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 171.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -43.2 MB). Peak memory consumption was 128.2 MB. Max. memory is 11.5 GB. * Witness Printer took 46.26 ms. Allocated memory is still 1.4 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 7.5 MB). Peak memory consumption was 7.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 688]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 64 locations, 1 error locations. SAFE Result, 6.5s OverallTime, 22 OverallIterations, 6 TraceHistogramMax, 2.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1323 SDtfs, 3720 SDslu, 6108 SDs, 0 SdLazy, 1203 SolverSat, 422 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1171 GetRequests, 836 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 2.9s 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, 22 MinimizatonAttempts, 765 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 1711 NumberOfCodeBlocks, 1710 NumberOfCodeBlocksAsserted, 67 NumberOfCheckSat, 1671 ConstructedInterpolants, 0 QuantifiedInterpolants, 220239 SizeOfPredicates, 174 NumberOfNonLiveVariables, 2120 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 40 InterpolantComputations, 6 PerfectInterpolantSequences, 253/980 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...