./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/pthread/triangular-longer_false-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 91b1670e Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/svcomp/c/pthread/triangular-longer_false-unreach-call.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 5c411f7a0e92322da42b7e0fe2dbd9719b462a69 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-91b1670 [2018-11-28 19:34:19,408 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 19:34:19,410 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 19:34:19,422 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 19:34:19,422 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 19:34:19,424 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 19:34:19,425 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 19:34:19,427 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 19:34:19,429 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 19:34:19,430 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 19:34:19,431 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 19:34:19,432 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 19:34:19,433 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 19:34:19,434 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 19:34:19,435 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 19:34:19,436 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 19:34:19,437 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 19:34:19,439 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 19:34:19,443 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 19:34:19,445 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 19:34:19,450 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 19:34:19,453 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 19:34:19,460 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 19:34:19,460 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 19:34:19,461 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 19:34:19,462 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 19:34:19,465 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 19:34:19,468 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 19:34:19,469 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 19:34:19,472 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 19:34:19,472 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 19:34:19,475 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 19:34:19,475 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 19:34:19,476 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 19:34:19,477 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 19:34:19,477 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 19:34:19,481 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 19:34:19,511 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 19:34:19,512 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 19:34:19,513 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 19:34:19,513 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 19:34:19,515 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 19:34:19,515 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 19:34:19,515 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 19:34:19,516 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 19:34:19,516 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 19:34:19,516 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 19:34:19,516 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 19:34:19,516 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 19:34:19,516 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 19:34:19,518 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 19:34:19,518 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 19:34:19,519 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 19:34:19,519 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 19:34:19,519 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 19:34:19,519 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 19:34:19,519 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 19:34:19,519 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 19:34:19,521 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 19:34:19,522 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 19:34:19,522 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 19:34:19,522 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 19:34:19,522 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 19:34:19,523 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 19:34:19,523 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 19:34:19,523 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 19:34:19,523 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 19:34:19,524 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 -> 5c411f7a0e92322da42b7e0fe2dbd9719b462a69 [2018-11-28 19:34:19,591 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 19:34:19,608 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 19:34:19,615 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 19:34:19,617 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 19:34:19,617 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 19:34:19,618 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/pthread/triangular-longer_false-unreach-call.i [2018-11-28 19:34:19,688 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e8ba292b/492b3e723343432c9aaaa0616b3cf6f0/FLAG25de9ca7a [2018-11-28 19:34:20,261 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 19:34:20,262 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/pthread/triangular-longer_false-unreach-call.i [2018-11-28 19:34:20,277 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e8ba292b/492b3e723343432c9aaaa0616b3cf6f0/FLAG25de9ca7a [2018-11-28 19:34:20,522 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e8ba292b/492b3e723343432c9aaaa0616b3cf6f0 [2018-11-28 19:34:20,528 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 19:34:20,529 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 19:34:20,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 19:34:20,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 19:34:20,537 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 19:34:20,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:34:20" (1/1) ... [2018-11-28 19:34:20,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a50fecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:20, skipping insertion in model container [2018-11-28 19:34:20,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:34:20" (1/1) ... [2018-11-28 19:34:20,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 19:34:20,602 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 19:34:21,009 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 19:34:21,030 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 19:34:21,165 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 19:34:21,258 INFO L195 MainTranslator]: Completed translation [2018-11-28 19:34:21,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:21 WrapperNode [2018-11-28 19:34:21,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 19:34:21,260 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 19:34:21,260 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 19:34:21,260 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 19:34:21,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:21" (1/1) ... [2018-11-28 19:34:21,290 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:21" (1/1) ... [2018-11-28 19:34:21,313 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 19:34:21,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 19:34:21,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 19:34:21,313 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 19:34:21,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:21" (1/1) ... [2018-11-28 19:34:21,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:21" (1/1) ... [2018-11-28 19:34:21,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:21" (1/1) ... [2018-11-28 19:34:21,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:21" (1/1) ... [2018-11-28 19:34:21,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:21" (1/1) ... [2018-11-28 19:34:21,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:21" (1/1) ... [2018-11-28 19:34:21,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:21" (1/1) ... [2018-11-28 19:34:21,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 19:34:21,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 19:34:21,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 19:34:21,343 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 19:34:21,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 19:34:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-28 19:34:21,403 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2018-11-28 19:34:21,404 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2018-11-28 19:34:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2018-11-28 19:34:21,404 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2018-11-28 19:34:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-28 19:34:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2018-11-28 19:34:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-28 19:34:21,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2018-11-28 19:34:21,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 19:34:21,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 19:34:21,408 WARN L198 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2018-11-28 19:34:21,880 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 19:34:21,880 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-11-28 19:34:21,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:34:21 BoogieIcfgContainer [2018-11-28 19:34:21,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 19:34:21,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 19:34:21,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 19:34:21,886 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 19:34:21,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:34:20" (1/3) ... [2018-11-28 19:34:21,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69ee8a24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:34:21, skipping insertion in model container [2018-11-28 19:34:21,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:21" (2/3) ... [2018-11-28 19:34:21,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69ee8a24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:34:21, skipping insertion in model container [2018-11-28 19:34:21,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:34:21" (3/3) ... [2018-11-28 19:34:21,891 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer_false-unreach-call.i [2018-11-28 19:34:21,924 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,925 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,925 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,925 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,926 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,926 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,926 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,926 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,928 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,928 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,928 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,928 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,928 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,929 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,930 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,931 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,931 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,931 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,931 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,931 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,932 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,933 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,933 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,933 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,933 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,934 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,934 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,934 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:21,959 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-11-28 19:34:21,960 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 19:34:21,969 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 19:34:21,987 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 19:34:22,015 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 19:34:22,016 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 19:34:22,016 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 19:34:22,016 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 19:34:22,016 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 19:34:22,017 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 19:34:22,017 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 19:34:22,017 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 19:34:22,017 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 19:34:22,028 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46places, 48 transitions [2018-11-28 19:34:22,116 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2018-11-28 19:34:22,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2018-11-28 19:34:22,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-28 19:34:22,129 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:22,131 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:34:22,133 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:22,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:22,144 INFO L82 PathProgramCache]: Analyzing trace with hash 573491188, now seen corresponding path program 1 times [2018-11-28 19:34:22,146 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:22,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:22,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:22,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:34:22,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:22,571 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 19:34:22,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 19:34:22,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 19:34:22,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 19:34:22,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-28 19:34:22,597 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2018-11-28 19:34:22,786 WARN L180 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-28 19:34:22,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:22,998 INFO L93 Difference]: Finished difference Result 1411 states and 4051 transitions. [2018-11-28 19:34:23,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 19:34:23,003 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-11-28 19:34:23,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:23,025 INFO L225 Difference]: With dead ends: 1411 [2018-11-28 19:34:23,025 INFO L226 Difference]: Without dead ends: 322 [2018-11-28 19:34:23,027 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-28 19:34:23,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2018-11-28 19:34:23,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2018-11-28 19:34:23,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-11-28 19:34:23,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 820 transitions. [2018-11-28 19:34:23,099 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 820 transitions. Word has length 19 [2018-11-28 19:34:23,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:23,099 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 820 transitions. [2018-11-28 19:34:23,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 19:34:23,100 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 820 transitions. [2018-11-28 19:34:23,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-28 19:34:23,101 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:23,102 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] [2018-11-28 19:34:23,102 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:23,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:23,102 INFO L82 PathProgramCache]: Analyzing trace with hash -143811728, now seen corresponding path program 1 times [2018-11-28 19:34:23,103 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:23,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:23,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:23,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:34:23,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:23,279 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 19:34:23,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 19:34:23,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 19:34:23,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 19:34:23,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-28 19:34:23,283 INFO L87 Difference]: Start difference. First operand 322 states and 820 transitions. Second operand 5 states. [2018-11-28 19:34:23,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:23,391 INFO L93 Difference]: Finished difference Result 411 states and 998 transitions. [2018-11-28 19:34:23,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 19:34:23,391 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-11-28 19:34:23,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:23,395 INFO L225 Difference]: With dead ends: 411 [2018-11-28 19:34:23,395 INFO L226 Difference]: Without dead ends: 290 [2018-11-28 19:34:23,396 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 [2018-11-28 19:34:23,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-11-28 19:34:23,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2018-11-28 19:34:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-11-28 19:34:23,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2018-11-28 19:34:23,416 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2018-11-28 19:34:23,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:23,417 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2018-11-28 19:34:23,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 19:34:23,417 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2018-11-28 19:34:23,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-28 19:34:23,419 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:23,419 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] [2018-11-28 19:34:23,419 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:23,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:23,420 INFO L82 PathProgramCache]: Analyzing trace with hash 28324926, now seen corresponding path program 1 times [2018-11-28 19:34:23,420 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:23,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:23,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:23,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:34:23,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:23,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:23,589 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 19:34:23,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-28 19:34:23,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 19:34:23,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 19:34:23,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 19:34:23,591 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2018-11-28 19:34:23,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:23,819 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2018-11-28 19:34:23,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 19:34:23,820 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-11-28 19:34:23,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:23,823 INFO L225 Difference]: With dead ends: 437 [2018-11-28 19:34:23,824 INFO L226 Difference]: Without dead ends: 309 [2018-11-28 19:34:23,824 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-28 19:34:23,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-11-28 19:34:23,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 299. [2018-11-28 19:34:23,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-11-28 19:34:23,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 732 transitions. [2018-11-28 19:34:23,843 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 732 transitions. Word has length 25 [2018-11-28 19:34:23,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:23,844 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 732 transitions. [2018-11-28 19:34:23,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 19:34:23,844 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 732 transitions. [2018-11-28 19:34:23,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-28 19:34:23,847 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:23,847 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] [2018-11-28 19:34:23,848 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:23,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:23,848 INFO L82 PathProgramCache]: Analyzing trace with hash 19387626, now seen corresponding path program 2 times [2018-11-28 19:34:23,848 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:23,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:23,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:23,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:34:23,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:23,989 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 19:34:23,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-28 19:34:23,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 19:34:23,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 19:34:23,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 19:34:23,991 INFO L87 Difference]: Start difference. First operand 299 states and 732 transitions. Second operand 6 states. [2018-11-28 19:34:24,317 WARN L180 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-28 19:34:24,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:24,454 INFO L93 Difference]: Finished difference Result 456 states and 1095 transitions. [2018-11-28 19:34:24,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 19:34:24,458 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-11-28 19:34:24,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:24,462 INFO L225 Difference]: With dead ends: 456 [2018-11-28 19:34:24,463 INFO L226 Difference]: Without dead ends: 319 [2018-11-28 19:34:24,463 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-28 19:34:24,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-11-28 19:34:24,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-11-28 19:34:24,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-11-28 19:34:24,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2018-11-28 19:34:24,489 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2018-11-28 19:34:24,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:24,489 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2018-11-28 19:34:24,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 19:34:24,490 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2018-11-28 19:34:24,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-28 19:34:24,497 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:24,497 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] [2018-11-28 19:34:24,497 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:24,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:24,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1592611961, now seen corresponding path program 1 times [2018-11-28 19:34:24,498 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:24,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:24,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:24,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:24,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:24,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:24,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:24,914 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:34:24,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:34:24,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:25,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:25,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:25,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:25,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-28 19:34:25,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 19:34:25,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 19:34:25,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-28 19:34:25,112 INFO L87 Difference]: Start difference. First operand 319 states and 772 transitions. Second operand 8 states. [2018-11-28 19:34:25,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:25,457 INFO L93 Difference]: Finished difference Result 466 states and 1115 transitions. [2018-11-28 19:34:25,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 19:34:25,462 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-11-28 19:34:25,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:25,466 INFO L225 Difference]: With dead ends: 466 [2018-11-28 19:34:25,466 INFO L226 Difference]: Without dead ends: 335 [2018-11-28 19:34:25,467 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-11-28 19:34:25,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-11-28 19:34:25,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 300. [2018-11-28 19:34:25,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2018-11-28 19:34:25,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 734 transitions. [2018-11-28 19:34:25,486 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 734 transitions. Word has length 29 [2018-11-28 19:34:25,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:25,491 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 734 transitions. [2018-11-28 19:34:25,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 19:34:25,492 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 734 transitions. [2018-11-28 19:34:25,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-28 19:34:25,494 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:25,494 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] [2018-11-28 19:34:25,494 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:25,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:25,495 INFO L82 PathProgramCache]: Analyzing trace with hash 2035666861, now seen corresponding path program 1 times [2018-11-28 19:34:25,495 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:25,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:25,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:25,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:34:25,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:25,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:25,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:25,750 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:34:25,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:34:25,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:25,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:25,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:25,995 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:25,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-28 19:34:25,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 19:34:25,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 19:34:25,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-28 19:34:25,997 INFO L87 Difference]: Start difference. First operand 300 states and 734 transitions. Second operand 8 states. [2018-11-28 19:34:26,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:26,203 INFO L93 Difference]: Finished difference Result 482 states and 1147 transitions. [2018-11-28 19:34:26,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 19:34:26,206 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-11-28 19:34:26,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:26,211 INFO L225 Difference]: With dead ends: 482 [2018-11-28 19:34:26,212 INFO L226 Difference]: Without dead ends: 351 [2018-11-28 19:34:26,212 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-11-28 19:34:26,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-11-28 19:34:26,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-11-28 19:34:26,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-11-28 19:34:26,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 836 transitions. [2018-11-28 19:34:26,227 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 836 transitions. Word has length 29 [2018-11-28 19:34:26,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:26,229 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 836 transitions. [2018-11-28 19:34:26,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 19:34:26,229 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 836 transitions. [2018-11-28 19:34:26,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-28 19:34:26,232 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:26,232 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] [2018-11-28 19:34:26,232 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:26,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:26,233 INFO L82 PathProgramCache]: Analyzing trace with hash -460714038, now seen corresponding path program 1 times [2018-11-28 19:34:26,233 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:26,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:26,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:26,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:34:26,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:26,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:26,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:26,596 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:34:26,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:34:26,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:26,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:26,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:26,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:26,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-28 19:34:26,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 19:34:26,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 19:34:26,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-11-28 19:34:26,762 INFO L87 Difference]: Start difference. First operand 351 states and 836 transitions. Second operand 9 states. [2018-11-28 19:34:26,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:26,998 INFO L93 Difference]: Finished difference Result 498 states and 1179 transitions. [2018-11-28 19:34:26,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 19:34:26,998 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-11-28 19:34:26,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:27,001 INFO L225 Difference]: With dead ends: 498 [2018-11-28 19:34:27,001 INFO L226 Difference]: Without dead ends: 367 [2018-11-28 19:34:27,002 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-11-28 19:34:27,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-11-28 19:34:27,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 316. [2018-11-28 19:34:27,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-11-28 19:34:27,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 766 transitions. [2018-11-28 19:34:27,012 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 766 transitions. Word has length 33 [2018-11-28 19:34:27,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:27,012 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 766 transitions. [2018-11-28 19:34:27,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 19:34:27,012 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 766 transitions. [2018-11-28 19:34:27,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-28 19:34:27,013 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:27,013 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] [2018-11-28 19:34:27,014 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:27,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:27,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1110322378, now seen corresponding path program 2 times [2018-11-28 19:34:27,014 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:27,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:27,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:27,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:34:27,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:27,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:27,164 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:34:27,183 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 19:34:27,207 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 19:34:27,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:27,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:27,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:27,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-28 19:34:27,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 19:34:27,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 19:34:27,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-11-28 19:34:27,361 INFO L87 Difference]: Start difference. First operand 316 states and 766 transitions. Second operand 9 states. [2018-11-28 19:34:27,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:27,645 INFO L93 Difference]: Finished difference Result 514 states and 1211 transitions. [2018-11-28 19:34:27,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 19:34:27,648 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-11-28 19:34:27,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:27,650 INFO L225 Difference]: With dead ends: 514 [2018-11-28 19:34:27,651 INFO L226 Difference]: Without dead ends: 383 [2018-11-28 19:34:27,653 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-11-28 19:34:27,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-11-28 19:34:27,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2018-11-28 19:34:27,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-11-28 19:34:27,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 900 transitions. [2018-11-28 19:34:27,666 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 900 transitions. Word has length 33 [2018-11-28 19:34:27,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:27,669 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 900 transitions. [2018-11-28 19:34:27,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 19:34:27,669 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 900 transitions. [2018-11-28 19:34:27,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-28 19:34:27,670 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:27,670 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] [2018-11-28 19:34:27,670 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:27,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:27,671 INFO L82 PathProgramCache]: Analyzing trace with hash 2061178471, now seen corresponding path program 3 times [2018-11-28 19:34:27,671 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:27,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:27,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:27,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:27,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:27,828 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:27,828 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:34:27,862 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 19:34:27,918 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-28 19:34:27,918 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:27,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:28,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:28,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:28,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-28 19:34:28,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 19:34:28,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 19:34:28,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-11-28 19:34:28,025 INFO L87 Difference]: Start difference. First operand 383 states and 900 transitions. Second operand 10 states. [2018-11-28 19:34:28,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:28,303 INFO L93 Difference]: Finished difference Result 530 states and 1243 transitions. [2018-11-28 19:34:28,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 19:34:28,304 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-11-28 19:34:28,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:28,307 INFO L225 Difference]: With dead ends: 530 [2018-11-28 19:34:28,307 INFO L226 Difference]: Without dead ends: 399 [2018-11-28 19:34:28,308 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2018-11-28 19:34:28,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-11-28 19:34:28,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 332. [2018-11-28 19:34:28,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2018-11-28 19:34:28,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 798 transitions. [2018-11-28 19:34:28,317 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 798 transitions. Word has length 37 [2018-11-28 19:34:28,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:28,318 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 798 transitions. [2018-11-28 19:34:28,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 19:34:28,318 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 798 transitions. [2018-11-28 19:34:28,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-28 19:34:28,322 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:28,322 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] [2018-11-28 19:34:28,323 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:28,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:28,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1649592435, now seen corresponding path program 4 times [2018-11-28 19:34:28,323 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:28,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:28,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:28,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:28,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:28,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:28,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:28,509 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:34:28,535 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 19:34:28,564 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 19:34:28,564 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:28,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:28,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:28,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-28 19:34:28,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 19:34:28,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 19:34:28,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-11-28 19:34:28,621 INFO L87 Difference]: Start difference. First operand 332 states and 798 transitions. Second operand 10 states. [2018-11-28 19:34:28,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:28,760 INFO L93 Difference]: Finished difference Result 546 states and 1275 transitions. [2018-11-28 19:34:28,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 19:34:28,761 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-11-28 19:34:28,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:28,764 INFO L225 Difference]: With dead ends: 546 [2018-11-28 19:34:28,764 INFO L226 Difference]: Without dead ends: 415 [2018-11-28 19:34:28,765 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2018-11-28 19:34:28,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2018-11-28 19:34:28,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2018-11-28 19:34:28,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2018-11-28 19:34:28,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 964 transitions. [2018-11-28 19:34:28,775 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 964 transitions. Word has length 37 [2018-11-28 19:34:28,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:28,775 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 964 transitions. [2018-11-28 19:34:28,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 19:34:28,776 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 964 transitions. [2018-11-28 19:34:28,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-28 19:34:28,777 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:28,779 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] [2018-11-28 19:34:28,779 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:28,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:28,779 INFO L82 PathProgramCache]: Analyzing trace with hash 2086800042, now seen corresponding path program 5 times [2018-11-28 19:34:28,779 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:28,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:28,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:28,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:28,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:28,951 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:28,952 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:34:28,965 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 19:34:29,011 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-11-28 19:34:29,011 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:29,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:29,071 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:29,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-28 19:34:29,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 19:34:29,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 19:34:29,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-28 19:34:29,073 INFO L87 Difference]: Start difference. First operand 415 states and 964 transitions. Second operand 11 states. [2018-11-28 19:34:29,210 WARN L180 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-11-28 19:34:29,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:29,352 INFO L93 Difference]: Finished difference Result 562 states and 1307 transitions. [2018-11-28 19:34:29,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 19:34:29,353 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-11-28 19:34:29,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:29,355 INFO L225 Difference]: With dead ends: 562 [2018-11-28 19:34:29,356 INFO L226 Difference]: Without dead ends: 431 [2018-11-28 19:34:29,356 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2018-11-28 19:34:29,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-11-28 19:34:29,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 348. [2018-11-28 19:34:29,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2018-11-28 19:34:29,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 830 transitions. [2018-11-28 19:34:29,366 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 830 transitions. Word has length 41 [2018-11-28 19:34:29,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:29,367 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 830 transitions. [2018-11-28 19:34:29,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 19:34:29,367 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 830 transitions. [2018-11-28 19:34:29,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-28 19:34:29,369 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:29,369 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] [2018-11-28 19:34:29,370 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:29,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:29,370 INFO L82 PathProgramCache]: Analyzing trace with hash 449750186, now seen corresponding path program 6 times [2018-11-28 19:34:29,371 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:29,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:29,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:29,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:29,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:29,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:29,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:29,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:29,527 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:34:29,539 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 19:34:29,591 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-11-28 19:34:29,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:29,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:29,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:29,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:29,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-28 19:34:29,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 19:34:29,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 19:34:29,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-28 19:34:29,651 INFO L87 Difference]: Start difference. First operand 348 states and 830 transitions. Second operand 11 states. [2018-11-28 19:34:29,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:29,913 INFO L93 Difference]: Finished difference Result 578 states and 1339 transitions. [2018-11-28 19:34:29,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 19:34:29,914 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-11-28 19:34:29,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:29,918 INFO L225 Difference]: With dead ends: 578 [2018-11-28 19:34:29,918 INFO L226 Difference]: Without dead ends: 447 [2018-11-28 19:34:29,918 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2018-11-28 19:34:29,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-11-28 19:34:29,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2018-11-28 19:34:29,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-11-28 19:34:29,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1028 transitions. [2018-11-28 19:34:29,928 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1028 transitions. Word has length 41 [2018-11-28 19:34:29,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:29,930 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1028 transitions. [2018-11-28 19:34:29,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 19:34:29,930 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1028 transitions. [2018-11-28 19:34:29,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-28 19:34:29,931 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:29,931 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] [2018-11-28 19:34:29,931 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:29,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:29,931 INFO L82 PathProgramCache]: Analyzing trace with hash 511353159, now seen corresponding path program 7 times [2018-11-28 19:34:29,933 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:29,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:29,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:29,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:29,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:30,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:30,433 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:34:30,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:34:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:30,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:30,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:30,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-28 19:34:30,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 19:34:30,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 19:34:30,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-11-28 19:34:30,527 INFO L87 Difference]: Start difference. First operand 447 states and 1028 transitions. Second operand 12 states. [2018-11-28 19:34:30,931 WARN L180 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-28 19:34:31,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:31,123 INFO L93 Difference]: Finished difference Result 594 states and 1371 transitions. [2018-11-28 19:34:31,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 19:34:31,124 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-11-28 19:34:31,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:31,127 INFO L225 Difference]: With dead ends: 594 [2018-11-28 19:34:31,127 INFO L226 Difference]: Without dead ends: 463 [2018-11-28 19:34:31,127 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2018-11-28 19:34:31,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2018-11-28 19:34:31,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 364. [2018-11-28 19:34:31,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-11-28 19:34:31,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 862 transitions. [2018-11-28 19:34:31,136 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 862 transitions. Word has length 45 [2018-11-28 19:34:31,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:31,136 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 862 transitions. [2018-11-28 19:34:31,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 19:34:31,138 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 862 transitions. [2018-11-28 19:34:31,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-28 19:34:31,139 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:31,139 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] [2018-11-28 19:34:31,141 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:31,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:31,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1081163923, now seen corresponding path program 8 times [2018-11-28 19:34:31,141 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:31,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:31,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:31,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:34:31,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:31,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:31,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:31,322 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2018-11-28 19:34:31,334 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 19:34:31,382 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 19:34:31,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:31,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:31,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:31,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-28 19:34:31,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 19:34:31,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 19:34:31,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-11-28 19:34:31,493 INFO L87 Difference]: Start difference. First operand 364 states and 862 transitions. Second operand 12 states. [2018-11-28 19:34:31,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:31,714 INFO L93 Difference]: Finished difference Result 610 states and 1403 transitions. [2018-11-28 19:34:31,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 19:34:31,715 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-11-28 19:34:31,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:31,718 INFO L225 Difference]: With dead ends: 610 [2018-11-28 19:34:31,718 INFO L226 Difference]: Without dead ends: 479 [2018-11-28 19:34:31,718 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2018-11-28 19:34:31,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-11-28 19:34:31,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2018-11-28 19:34:31,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-11-28 19:34:31,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1092 transitions. [2018-11-28 19:34:31,732 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1092 transitions. Word has length 45 [2018-11-28 19:34:31,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:31,732 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 1092 transitions. [2018-11-28 19:34:31,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 19:34:31,733 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1092 transitions. [2018-11-28 19:34:31,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-28 19:34:31,735 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:31,736 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] [2018-11-28 19:34:31,736 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:31,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:31,736 INFO L82 PathProgramCache]: Analyzing trace with hash -578738806, now seen corresponding path program 9 times [2018-11-28 19:34:31,736 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:31,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:31,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:31,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:31,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:31,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:31,923 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2018-11-28 19:34:31,951 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 19:34:32,016 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-28 19:34:32,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:32,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:32,075 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:32,094 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:32,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-28 19:34:32,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 19:34:32,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 19:34:32,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-11-28 19:34:32,095 INFO L87 Difference]: Start difference. First operand 479 states and 1092 transitions. Second operand 13 states. [2018-11-28 19:34:32,348 WARN L180 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-11-28 19:34:32,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:32,474 INFO L93 Difference]: Finished difference Result 626 states and 1435 transitions. [2018-11-28 19:34:32,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 19:34:32,476 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-11-28 19:34:32,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:32,479 INFO L225 Difference]: With dead ends: 626 [2018-11-28 19:34:32,479 INFO L226 Difference]: Without dead ends: 495 [2018-11-28 19:34:32,479 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2018-11-28 19:34:32,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-11-28 19:34:32,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 380. [2018-11-28 19:34:32,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2018-11-28 19:34:32,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 894 transitions. [2018-11-28 19:34:32,489 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 894 transitions. Word has length 49 [2018-11-28 19:34:32,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:32,489 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 894 transitions. [2018-11-28 19:34:32,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 19:34:32,492 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 894 transitions. [2018-11-28 19:34:32,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-28 19:34:32,492 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:32,493 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] [2018-11-28 19:34:32,493 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:32,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:32,494 INFO L82 PathProgramCache]: Analyzing trace with hash -555139958, now seen corresponding path program 10 times [2018-11-28 19:34:32,494 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:32,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:32,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:32,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:32,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:32,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:32,691 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:32,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:32,691 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2018-11-28 19:34:32,702 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 19:34:32,724 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 19:34:32,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:32,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:33,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:33,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-28 19:34:33,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 19:34:33,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 19:34:33,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-11-28 19:34:33,009 INFO L87 Difference]: Start difference. First operand 380 states and 894 transitions. Second operand 13 states. [2018-11-28 19:34:33,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:33,273 INFO L93 Difference]: Finished difference Result 642 states and 1467 transitions. [2018-11-28 19:34:33,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 19:34:33,274 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-11-28 19:34:33,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:33,277 INFO L225 Difference]: With dead ends: 642 [2018-11-28 19:34:33,277 INFO L226 Difference]: Without dead ends: 511 [2018-11-28 19:34:33,278 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2018-11-28 19:34:33,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2018-11-28 19:34:33,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2018-11-28 19:34:33,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2018-11-28 19:34:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1156 transitions. [2018-11-28 19:34:33,287 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1156 transitions. Word has length 49 [2018-11-28 19:34:33,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:33,287 INFO L480 AbstractCegarLoop]: Abstraction has 511 states and 1156 transitions. [2018-11-28 19:34:33,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 19:34:33,288 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1156 transitions. [2018-11-28 19:34:33,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-28 19:34:33,291 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:33,291 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] [2018-11-28 19:34:33,291 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:33,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:33,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1389448231, now seen corresponding path program 11 times [2018-11-28 19:34:33,292 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:33,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:33,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:33,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:33,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:33,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:33,526 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:33,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:33,526 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2018-11-28 19:34:33,539 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 19:34:33,609 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-11-28 19:34:33,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:33,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:33,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:33,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-11-28 19:34:33,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 19:34:33,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 19:34:33,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-11-28 19:34:33,798 INFO L87 Difference]: Start difference. First operand 511 states and 1156 transitions. Second operand 14 states. [2018-11-28 19:34:34,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:34,037 INFO L93 Difference]: Finished difference Result 658 states and 1499 transitions. [2018-11-28 19:34:34,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 19:34:34,038 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-11-28 19:34:34,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:34,042 INFO L225 Difference]: With dead ends: 658 [2018-11-28 19:34:34,042 INFO L226 Difference]: Without dead ends: 527 [2018-11-28 19:34:34,043 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2018-11-28 19:34:34,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2018-11-28 19:34:34,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 396. [2018-11-28 19:34:34,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2018-11-28 19:34:34,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 926 transitions. [2018-11-28 19:34:34,053 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 926 transitions. Word has length 53 [2018-11-28 19:34:34,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:34,053 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 926 transitions. [2018-11-28 19:34:34,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 19:34:34,053 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 926 transitions. [2018-11-28 19:34:34,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-28 19:34:34,056 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:34,057 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] [2018-11-28 19:34:34,057 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:34,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:34,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1121609549, now seen corresponding path program 12 times [2018-11-28 19:34:34,057 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:34,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:34,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:34,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:34,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:34,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:34,778 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:34,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:34,779 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2018-11-28 19:34:34,791 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 19:34:34,811 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-11-28 19:34:34,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:34,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:34,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:34,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-11-28 19:34:34,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 19:34:34,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 19:34:34,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-11-28 19:34:34,861 INFO L87 Difference]: Start difference. First operand 396 states and 926 transitions. Second operand 14 states. [2018-11-28 19:34:35,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:35,093 INFO L93 Difference]: Finished difference Result 674 states and 1531 transitions. [2018-11-28 19:34:35,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 19:34:35,094 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-11-28 19:34:35,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:35,097 INFO L225 Difference]: With dead ends: 674 [2018-11-28 19:34:35,097 INFO L226 Difference]: Without dead ends: 543 [2018-11-28 19:34:35,098 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2018-11-28 19:34:35,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-11-28 19:34:35,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2018-11-28 19:34:35,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2018-11-28 19:34:35,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1220 transitions. [2018-11-28 19:34:35,107 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1220 transitions. Word has length 53 [2018-11-28 19:34:35,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:35,107 INFO L480 AbstractCegarLoop]: Abstraction has 543 states and 1220 transitions. [2018-11-28 19:34:35,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 19:34:35,108 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1220 transitions. [2018-11-28 19:34:35,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-28 19:34:35,110 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:35,110 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] [2018-11-28 19:34:35,110 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:35,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:35,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1590124650, now seen corresponding path program 13 times [2018-11-28 19:34:35,111 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:35,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:35,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:35,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:35,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:35,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:35,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:35,324 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2018-11-28 19:34:35,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:34:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:35,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:35,452 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:35,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:35,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-11-28 19:34:35,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 19:34:35,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 19:34:35,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-11-28 19:34:35,483 INFO L87 Difference]: Start difference. First operand 543 states and 1220 transitions. Second operand 15 states. [2018-11-28 19:34:35,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:35,776 INFO L93 Difference]: Finished difference Result 690 states and 1563 transitions. [2018-11-28 19:34:35,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 19:34:35,777 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-11-28 19:34:35,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:35,782 INFO L225 Difference]: With dead ends: 690 [2018-11-28 19:34:35,782 INFO L226 Difference]: Without dead ends: 559 [2018-11-28 19:34:35,782 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2018-11-28 19:34:35,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2018-11-28 19:34:35,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 412. [2018-11-28 19:34:35,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-11-28 19:34:35,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 958 transitions. [2018-11-28 19:34:35,791 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 958 transitions. Word has length 57 [2018-11-28 19:34:35,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:35,793 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 958 transitions. [2018-11-28 19:34:35,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 19:34:35,793 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 958 transitions. [2018-11-28 19:34:35,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-28 19:34:35,794 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:35,794 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] [2018-11-28 19:34:35,796 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:35,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:35,796 INFO L82 PathProgramCache]: Analyzing trace with hash 39711850, now seen corresponding path program 14 times [2018-11-28 19:34:35,796 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:35,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:35,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:35,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:34:35,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:36,043 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:36,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:36,043 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2018-11-28 19:34:36,066 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 19:34:36,090 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 19:34:36,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:36,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:36,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:36,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-11-28 19:34:36,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 19:34:36,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 19:34:36,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-11-28 19:34:36,172 INFO L87 Difference]: Start difference. First operand 412 states and 958 transitions. Second operand 15 states. [2018-11-28 19:34:36,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:36,470 INFO L93 Difference]: Finished difference Result 706 states and 1595 transitions. [2018-11-28 19:34:36,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 19:34:36,471 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-11-28 19:34:36,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:36,474 INFO L225 Difference]: With dead ends: 706 [2018-11-28 19:34:36,475 INFO L226 Difference]: Without dead ends: 575 [2018-11-28 19:34:36,475 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2018-11-28 19:34:36,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2018-11-28 19:34:36,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2018-11-28 19:34:36,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2018-11-28 19:34:36,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1284 transitions. [2018-11-28 19:34:36,485 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1284 transitions. Word has length 57 [2018-11-28 19:34:36,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:36,487 INFO L480 AbstractCegarLoop]: Abstraction has 575 states and 1284 transitions. [2018-11-28 19:34:36,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 19:34:36,487 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1284 transitions. [2018-11-28 19:34:36,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-28 19:34:36,490 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:36,490 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] [2018-11-28 19:34:36,490 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:36,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:36,491 INFO L82 PathProgramCache]: Analyzing trace with hash -21031161, now seen corresponding path program 15 times [2018-11-28 19:34:36,491 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:36,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:36,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:36,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:36,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:36,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:36,928 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:36,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:36,929 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2018-11-28 19:34:36,941 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 19:34:36,968 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-28 19:34:36,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:36,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:37,008 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:37,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:37,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-11-28 19:34:37,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-28 19:34:37,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-28 19:34:37,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-11-28 19:34:37,031 INFO L87 Difference]: Start difference. First operand 575 states and 1284 transitions. Second operand 16 states. [2018-11-28 19:34:37,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:37,313 INFO L93 Difference]: Finished difference Result 722 states and 1627 transitions. [2018-11-28 19:34:37,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-28 19:34:37,314 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2018-11-28 19:34:37,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:37,316 INFO L225 Difference]: With dead ends: 722 [2018-11-28 19:34:37,316 INFO L226 Difference]: Without dead ends: 591 [2018-11-28 19:34:37,317 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2018-11-28 19:34:37,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2018-11-28 19:34:37,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 428. [2018-11-28 19:34:37,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2018-11-28 19:34:37,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 990 transitions. [2018-11-28 19:34:37,325 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 990 transitions. Word has length 61 [2018-11-28 19:34:37,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:37,326 INFO L480 AbstractCegarLoop]: Abstraction has 428 states and 990 transitions. [2018-11-28 19:34:37,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-28 19:34:37,326 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 990 transitions. [2018-11-28 19:34:37,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-28 19:34:37,329 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:37,329 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] [2018-11-28 19:34:37,329 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:37,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:37,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1418711251, now seen corresponding path program 16 times [2018-11-28 19:34:37,331 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:37,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:37,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:37,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:37,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:37,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:37,627 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2018-11-28 19:34:37,644 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 19:34:37,689 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 19:34:37,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:37,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:37,779 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:37,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:37,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-11-28 19:34:37,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-28 19:34:37,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-28 19:34:37,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-11-28 19:34:37,798 INFO L87 Difference]: Start difference. First operand 428 states and 990 transitions. Second operand 16 states. [2018-11-28 19:34:38,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:38,153 INFO L93 Difference]: Finished difference Result 738 states and 1659 transitions. [2018-11-28 19:34:38,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 19:34:38,154 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2018-11-28 19:34:38,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:38,158 INFO L225 Difference]: With dead ends: 738 [2018-11-28 19:34:38,158 INFO L226 Difference]: Without dead ends: 607 [2018-11-28 19:34:38,159 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2018-11-28 19:34:38,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2018-11-28 19:34:38,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2018-11-28 19:34:38,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2018-11-28 19:34:38,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1348 transitions. [2018-11-28 19:34:38,171 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1348 transitions. Word has length 61 [2018-11-28 19:34:38,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:38,171 INFO L480 AbstractCegarLoop]: Abstraction has 607 states and 1348 transitions. [2018-11-28 19:34:38,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-28 19:34:38,171 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1348 transitions. [2018-11-28 19:34:38,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-28 19:34:38,176 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:38,176 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:34:38,176 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:38,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:38,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1997847370, now seen corresponding path program 17 times [2018-11-28 19:34:38,176 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:38,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:38,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:38,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:38,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:38,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:38,499 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:34:38,511 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 19:34:38,538 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-28 19:34:38,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:38,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:38,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:38,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-11-28 19:34:38,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-28 19:34:38,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-28 19:34:38,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-11-28 19:34:38,612 INFO L87 Difference]: Start difference. First operand 607 states and 1348 transitions. Second operand 17 states. [2018-11-28 19:34:38,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:38,912 INFO L93 Difference]: Finished difference Result 754 states and 1691 transitions. [2018-11-28 19:34:38,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-28 19:34:38,913 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2018-11-28 19:34:38,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:38,916 INFO L225 Difference]: With dead ends: 754 [2018-11-28 19:34:38,917 INFO L226 Difference]: Without dead ends: 623 [2018-11-28 19:34:38,917 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=271, Invalid=599, Unknown=0, NotChecked=0, Total=870 [2018-11-28 19:34:38,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2018-11-28 19:34:38,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 444. [2018-11-28 19:34:38,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2018-11-28 19:34:38,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1022 transitions. [2018-11-28 19:34:38,926 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1022 transitions. Word has length 65 [2018-11-28 19:34:38,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:38,928 INFO L480 AbstractCegarLoop]: Abstraction has 444 states and 1022 transitions. [2018-11-28 19:34:38,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-28 19:34:38,928 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1022 transitions. [2018-11-28 19:34:38,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-28 19:34:38,929 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:38,931 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:34:38,931 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:38,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:38,932 INFO L82 PathProgramCache]: Analyzing trace with hash 420269130, now seen corresponding path program 18 times [2018-11-28 19:34:38,932 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:38,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:38,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:38,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:38,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:39,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:39,199 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:34:39,210 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 19:34:39,237 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-11-28 19:34:39,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:39,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:39,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:39,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-11-28 19:34:39,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-28 19:34:39,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-28 19:34:39,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-11-28 19:34:39,326 INFO L87 Difference]: Start difference. First operand 444 states and 1022 transitions. Second operand 17 states. [2018-11-28 19:34:39,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:39,687 INFO L93 Difference]: Finished difference Result 770 states and 1723 transitions. [2018-11-28 19:34:39,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-28 19:34:39,689 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2018-11-28 19:34:39,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:39,692 INFO L225 Difference]: With dead ends: 770 [2018-11-28 19:34:39,693 INFO L226 Difference]: Without dead ends: 639 [2018-11-28 19:34:39,693 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=608, Unknown=0, NotChecked=0, Total=870 [2018-11-28 19:34:39,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2018-11-28 19:34:39,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 639. [2018-11-28 19:34:39,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 639 states. [2018-11-28 19:34:39,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1412 transitions. [2018-11-28 19:34:39,703 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1412 transitions. Word has length 65 [2018-11-28 19:34:39,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:39,704 INFO L480 AbstractCegarLoop]: Abstraction has 639 states and 1412 transitions. [2018-11-28 19:34:39,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-28 19:34:39,704 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1412 transitions. [2018-11-28 19:34:39,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-28 19:34:39,708 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:39,708 INFO L402 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:34:39,709 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:39,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:39,709 INFO L82 PathProgramCache]: Analyzing trace with hash 690225639, now seen corresponding path program 19 times [2018-11-28 19:34:39,709 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:39,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:39,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:39,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:39,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:39,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:39,988 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:34:40,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:34:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:40,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:40,109 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:40,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:40,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-11-28 19:34:40,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-28 19:34:40,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-28 19:34:40,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2018-11-28 19:34:40,132 INFO L87 Difference]: Start difference. First operand 639 states and 1412 transitions. Second operand 18 states. [2018-11-28 19:34:40,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:40,458 INFO L93 Difference]: Finished difference Result 786 states and 1755 transitions. [2018-11-28 19:34:40,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-28 19:34:40,460 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2018-11-28 19:34:40,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:40,463 INFO L225 Difference]: With dead ends: 786 [2018-11-28 19:34:40,463 INFO L226 Difference]: Without dead ends: 655 [2018-11-28 19:34:40,464 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2018-11-28 19:34:40,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2018-11-28 19:34:40,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 460. [2018-11-28 19:34:40,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-11-28 19:34:40,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1054 transitions. [2018-11-28 19:34:40,470 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1054 transitions. Word has length 69 [2018-11-28 19:34:40,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:40,471 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 1054 transitions. [2018-11-28 19:34:40,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-28 19:34:40,471 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1054 transitions. [2018-11-28 19:34:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-28 19:34:40,474 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:40,474 INFO L402 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:34:40,475 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:40,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:40,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1657792755, now seen corresponding path program 20 times [2018-11-28 19:34:40,475 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:40,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:40,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:40,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:34:40,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:40,761 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:40,761 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:40,762 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:34:40,773 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 19:34:40,797 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 19:34:40,797 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:40,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:40,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:40,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-11-28 19:34:40,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-28 19:34:40,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-28 19:34:40,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2018-11-28 19:34:40,862 INFO L87 Difference]: Start difference. First operand 460 states and 1054 transitions. Second operand 18 states. [2018-11-28 19:34:41,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:41,267 INFO L93 Difference]: Finished difference Result 802 states and 1787 transitions. [2018-11-28 19:34:41,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-28 19:34:41,268 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2018-11-28 19:34:41,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:41,272 INFO L225 Difference]: With dead ends: 802 [2018-11-28 19:34:41,272 INFO L226 Difference]: Without dead ends: 671 [2018-11-28 19:34:41,272 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=284, Invalid=708, Unknown=0, NotChecked=0, Total=992 [2018-11-28 19:34:41,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2018-11-28 19:34:41,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 671. [2018-11-28 19:34:41,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 671 states. [2018-11-28 19:34:41,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1476 transitions. [2018-11-28 19:34:41,283 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1476 transitions. Word has length 69 [2018-11-28 19:34:41,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:41,284 INFO L480 AbstractCegarLoop]: Abstraction has 671 states and 1476 transitions. [2018-11-28 19:34:41,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-28 19:34:41,284 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1476 transitions. [2018-11-28 19:34:41,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-28 19:34:41,287 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:41,287 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:34:41,287 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:41,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:41,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1119275478, now seen corresponding path program 21 times [2018-11-28 19:34:41,288 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:41,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:41,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:41,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:41,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:41,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:41,482 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:34:41,493 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 19:34:41,524 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-28 19:34:41,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:41,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:41,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:41,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-11-28 19:34:41,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-28 19:34:41,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-28 19:34:41,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2018-11-28 19:34:41,610 INFO L87 Difference]: Start difference. First operand 671 states and 1476 transitions. Second operand 19 states. [2018-11-28 19:34:41,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:41,974 INFO L93 Difference]: Finished difference Result 818 states and 1819 transitions. [2018-11-28 19:34:41,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-28 19:34:41,975 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2018-11-28 19:34:41,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:41,980 INFO L225 Difference]: With dead ends: 818 [2018-11-28 19:34:41,980 INFO L226 Difference]: Without dead ends: 687 [2018-11-28 19:34:41,981 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2018-11-28 19:34:41,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2018-11-28 19:34:41,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 476. [2018-11-28 19:34:41,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2018-11-28 19:34:41,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1086 transitions. [2018-11-28 19:34:41,991 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1086 transitions. Word has length 73 [2018-11-28 19:34:41,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:41,991 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 1086 transitions. [2018-11-28 19:34:41,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-28 19:34:41,991 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1086 transitions. [2018-11-28 19:34:41,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-28 19:34:41,995 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:41,995 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:34:41,995 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:41,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:41,995 INFO L82 PathProgramCache]: Analyzing trace with hash -690633686, now seen corresponding path program 22 times [2018-11-28 19:34:41,995 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:41,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:42,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:42,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:42,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:42,180 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:42,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:42,180 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:34:42,192 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 19:34:42,223 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 19:34:42,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:42,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:42,276 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:42,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-11-28 19:34:42,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-28 19:34:42,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-28 19:34:42,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2018-11-28 19:34:42,277 INFO L87 Difference]: Start difference. First operand 476 states and 1086 transitions. Second operand 19 states. [2018-11-28 19:34:42,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:42,784 INFO L93 Difference]: Finished difference Result 834 states and 1851 transitions. [2018-11-28 19:34:42,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-28 19:34:42,785 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2018-11-28 19:34:42,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:42,788 INFO L225 Difference]: With dead ends: 834 [2018-11-28 19:34:42,788 INFO L226 Difference]: Without dead ends: 703 [2018-11-28 19:34:42,789 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=338, Invalid=784, Unknown=0, NotChecked=0, Total=1122 [2018-11-28 19:34:42,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2018-11-28 19:34:42,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 703. [2018-11-28 19:34:42,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2018-11-28 19:34:42,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1540 transitions. [2018-11-28 19:34:42,799 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1540 transitions. Word has length 73 [2018-11-28 19:34:42,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:42,799 INFO L480 AbstractCegarLoop]: Abstraction has 703 states and 1540 transitions. [2018-11-28 19:34:42,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-28 19:34:42,799 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1540 transitions. [2018-11-28 19:34:42,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-11-28 19:34:42,801 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:42,801 INFO L402 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:34:42,801 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:42,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:42,802 INFO L82 PathProgramCache]: Analyzing trace with hash -119534393, now seen corresponding path program 23 times [2018-11-28 19:34:42,802 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:42,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:42,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:42,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:42,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:43,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:43,351 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:34:43,379 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 19:34:43,413 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-11-28 19:34:43,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:43,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:43,453 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:43,471 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:43,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-11-28 19:34:43,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-28 19:34:43,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-28 19:34:43,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2018-11-28 19:34:43,473 INFO L87 Difference]: Start difference. First operand 703 states and 1540 transitions. Second operand 20 states. [2018-11-28 19:34:44,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:44,029 INFO L93 Difference]: Finished difference Result 850 states and 1883 transitions. [2018-11-28 19:34:44,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-28 19:34:44,030 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 77 [2018-11-28 19:34:44,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:44,034 INFO L225 Difference]: With dead ends: 850 [2018-11-28 19:34:44,034 INFO L226 Difference]: Without dead ends: 719 [2018-11-28 19:34:44,035 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=379, Invalid=881, Unknown=0, NotChecked=0, Total=1260 [2018-11-28 19:34:44,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2018-11-28 19:34:44,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 492. [2018-11-28 19:34:44,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 492 states. [2018-11-28 19:34:44,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1118 transitions. [2018-11-28 19:34:44,043 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1118 transitions. Word has length 77 [2018-11-28 19:34:44,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:44,044 INFO L480 AbstractCegarLoop]: Abstraction has 492 states and 1118 transitions. [2018-11-28 19:34:44,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-28 19:34:44,044 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1118 transitions. [2018-11-28 19:34:44,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-11-28 19:34:44,045 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:44,045 INFO L402 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:34:44,045 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:44,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:44,045 INFO L82 PathProgramCache]: Analyzing trace with hash -604365075, now seen corresponding path program 24 times [2018-11-28 19:34:44,045 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:44,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:44,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:44,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:44,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:44,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:44,378 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:34:44,390 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 19:34:44,424 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-11-28 19:34:44,425 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:44,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:44,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:44,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-11-28 19:34:44,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-28 19:34:44,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-28 19:34:44,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2018-11-28 19:34:44,480 INFO L87 Difference]: Start difference. First operand 492 states and 1118 transitions. Second operand 20 states. [2018-11-28 19:34:44,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:44,859 INFO L93 Difference]: Finished difference Result 866 states and 1915 transitions. [2018-11-28 19:34:44,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-28 19:34:44,860 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 77 [2018-11-28 19:34:44,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:44,864 INFO L225 Difference]: With dead ends: 866 [2018-11-28 19:34:44,864 INFO L226 Difference]: Without dead ends: 735 [2018-11-28 19:34:44,865 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=359, Invalid=901, Unknown=0, NotChecked=0, Total=1260 [2018-11-28 19:34:44,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2018-11-28 19:34:44,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 735. [2018-11-28 19:34:44,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 735 states. [2018-11-28 19:34:44,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1604 transitions. [2018-11-28 19:34:44,874 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1604 transitions. Word has length 77 [2018-11-28 19:34:44,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:44,874 INFO L480 AbstractCegarLoop]: Abstraction has 735 states and 1604 transitions. [2018-11-28 19:34:44,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-28 19:34:44,874 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1604 transitions. [2018-11-28 19:34:44,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-11-28 19:34:44,876 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:44,876 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:34:44,876 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:44,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:44,877 INFO L82 PathProgramCache]: Analyzing trace with hash -398143222, now seen corresponding path program 25 times [2018-11-28 19:34:44,878 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:44,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:44,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:44,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:44,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:45,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:45,178 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:34:45,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:34:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:45,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:45,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:45,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-11-28 19:34:45,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-28 19:34:45,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-28 19:34:45,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2018-11-28 19:34:45,282 INFO L87 Difference]: Start difference. First operand 735 states and 1604 transitions. Second operand 21 states. [2018-11-28 19:34:45,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:45,694 INFO L93 Difference]: Finished difference Result 882 states and 1947 transitions. [2018-11-28 19:34:45,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-28 19:34:45,695 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2018-11-28 19:34:45,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:45,699 INFO L225 Difference]: With dead ends: 882 [2018-11-28 19:34:45,699 INFO L226 Difference]: Without dead ends: 751 [2018-11-28 19:34:45,700 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=969, Unknown=0, NotChecked=0, Total=1406 [2018-11-28 19:34:45,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2018-11-28 19:34:45,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 508. [2018-11-28 19:34:45,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2018-11-28 19:34:45,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1150 transitions. [2018-11-28 19:34:45,708 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1150 transitions. Word has length 81 [2018-11-28 19:34:45,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:45,709 INFO L480 AbstractCegarLoop]: Abstraction has 508 states and 1150 transitions. [2018-11-28 19:34:45,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-28 19:34:45,709 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1150 transitions. [2018-11-28 19:34:45,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-11-28 19:34:45,710 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:45,710 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:34:45,710 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:45,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:45,710 INFO L82 PathProgramCache]: Analyzing trace with hash 261676042, now seen corresponding path program 26 times [2018-11-28 19:34:45,711 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:45,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:45,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:45,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:34:45,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:46,005 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:46,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:46,006 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:34:46,016 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 19:34:46,045 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 19:34:46,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:46,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:46,078 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:46,096 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:46,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-11-28 19:34:46,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-28 19:34:46,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-28 19:34:46,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2018-11-28 19:34:46,097 INFO L87 Difference]: Start difference. First operand 508 states and 1150 transitions. Second operand 21 states. [2018-11-28 19:34:46,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:46,546 INFO L93 Difference]: Finished difference Result 898 states and 1979 transitions. [2018-11-28 19:34:46,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-28 19:34:46,547 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2018-11-28 19:34:46,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:46,551 INFO L225 Difference]: With dead ends: 898 [2018-11-28 19:34:46,551 INFO L226 Difference]: Without dead ends: 767 [2018-11-28 19:34:46,552 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=424, Invalid=982, Unknown=0, NotChecked=0, Total=1406 [2018-11-28 19:34:46,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2018-11-28 19:34:46,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2018-11-28 19:34:46,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2018-11-28 19:34:46,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1668 transitions. [2018-11-28 19:34:46,564 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1668 transitions. Word has length 81 [2018-11-28 19:34:46,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:46,564 INFO L480 AbstractCegarLoop]: Abstraction has 767 states and 1668 transitions. [2018-11-28 19:34:46,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-28 19:34:46,564 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1668 transitions. [2018-11-28 19:34:46,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-28 19:34:46,566 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:46,566 INFO L402 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:34:46,566 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:46,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:46,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1261226073, now seen corresponding path program 27 times [2018-11-28 19:34:46,566 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:46,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:46,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:46,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:46,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:46,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:46,810 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:34:46,823 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 19:34:46,923 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-11-28 19:34:46,924 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:46,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:46,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:46,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-11-28 19:34:46,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-28 19:34:46,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-28 19:34:46,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2018-11-28 19:34:46,972 INFO L87 Difference]: Start difference. First operand 767 states and 1668 transitions. Second operand 22 states. [2018-11-28 19:34:47,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:47,457 INFO L93 Difference]: Finished difference Result 914 states and 2011 transitions. [2018-11-28 19:34:47,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-28 19:34:47,458 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 85 [2018-11-28 19:34:47,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:47,461 INFO L225 Difference]: With dead ends: 914 [2018-11-28 19:34:47,461 INFO L226 Difference]: Without dead ends: 783 [2018-11-28 19:34:47,462 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=470, Invalid=1090, Unknown=0, NotChecked=0, Total=1560 [2018-11-28 19:34:47,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2018-11-28 19:34:47,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 524. [2018-11-28 19:34:47,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2018-11-28 19:34:47,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1182 transitions. [2018-11-28 19:34:47,470 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1182 transitions. Word has length 85 [2018-11-28 19:34:47,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:47,471 INFO L480 AbstractCegarLoop]: Abstraction has 524 states and 1182 transitions. [2018-11-28 19:34:47,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-28 19:34:47,471 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1182 transitions. [2018-11-28 19:34:47,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-28 19:34:47,472 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:47,472 INFO L402 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:34:47,472 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:47,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:47,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1269712589, now seen corresponding path program 28 times [2018-11-28 19:34:47,473 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:47,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:47,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:47,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:47,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:47,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:48,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:48,008 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:34:48,020 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 19:34:48,052 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 19:34:48,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:48,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:48,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:48,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-11-28 19:34:48,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-28 19:34:48,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-28 19:34:48,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2018-11-28 19:34:48,131 INFO L87 Difference]: Start difference. First operand 524 states and 1182 transitions. Second operand 22 states. [2018-11-28 19:34:48,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:48,599 INFO L93 Difference]: Finished difference Result 930 states and 2043 transitions. [2018-11-28 19:34:48,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-28 19:34:48,600 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 85 [2018-11-28 19:34:48,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:48,605 INFO L225 Difference]: With dead ends: 930 [2018-11-28 19:34:48,605 INFO L226 Difference]: Without dead ends: 799 [2018-11-28 19:34:48,605 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=450, Invalid=1032, Unknown=0, NotChecked=0, Total=1482 [2018-11-28 19:34:48,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2018-11-28 19:34:48,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 799. [2018-11-28 19:34:48,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 799 states. [2018-11-28 19:34:48,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1732 transitions. [2018-11-28 19:34:48,619 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1732 transitions. Word has length 85 [2018-11-28 19:34:48,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:48,620 INFO L480 AbstractCegarLoop]: Abstraction has 799 states and 1732 transitions. [2018-11-28 19:34:48,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-28 19:34:48,622 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1732 transitions. [2018-11-28 19:34:48,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-11-28 19:34:48,624 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:48,624 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:34:48,624 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:48,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:48,624 INFO L82 PathProgramCache]: Analyzing trace with hash -823686166, now seen corresponding path program 29 times [2018-11-28 19:34:48,628 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:48,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:48,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:48,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:48,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:48,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:48,973 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:34:48,989 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 19:34:49,033 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-11-28 19:34:49,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:49,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:49,083 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:49,102 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:49,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-11-28 19:34:49,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-28 19:34:49,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-28 19:34:49,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2018-11-28 19:34:49,103 INFO L87 Difference]: Start difference. First operand 799 states and 1732 transitions. Second operand 23 states. [2018-11-28 19:34:49,967 WARN L180 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2018-11-28 19:34:50,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:50,143 INFO L93 Difference]: Finished difference Result 946 states and 2075 transitions. [2018-11-28 19:34:50,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-28 19:34:50,144 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 89 [2018-11-28 19:34:50,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:50,148 INFO L225 Difference]: With dead ends: 946 [2018-11-28 19:34:50,148 INFO L226 Difference]: Without dead ends: 815 [2018-11-28 19:34:50,149 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=535, Invalid=1187, Unknown=0, NotChecked=0, Total=1722 [2018-11-28 19:34:50,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2018-11-28 19:34:50,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 540. [2018-11-28 19:34:50,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2018-11-28 19:34:50,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1214 transitions. [2018-11-28 19:34:50,167 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1214 transitions. Word has length 89 [2018-11-28 19:34:50,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:50,168 INFO L480 AbstractCegarLoop]: Abstraction has 540 states and 1214 transitions. [2018-11-28 19:34:50,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-28 19:34:50,168 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1214 transitions. [2018-11-28 19:34:50,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-11-28 19:34:50,172 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:50,172 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:34:50,172 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:50,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:50,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1221192726, now seen corresponding path program 30 times [2018-11-28 19:34:50,172 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:50,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:50,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:50,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:50,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:50,648 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:50,648 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:34:50,660 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 19:34:50,698 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-11-28 19:34:50,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:50,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:50,769 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:50,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-11-28 19:34:50,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-28 19:34:50,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-28 19:34:50,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2018-11-28 19:34:50,771 INFO L87 Difference]: Start difference. First operand 540 states and 1214 transitions. Second operand 23 states. [2018-11-28 19:34:51,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:51,273 INFO L93 Difference]: Finished difference Result 962 states and 2107 transitions. [2018-11-28 19:34:51,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-28 19:34:51,274 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 89 [2018-11-28 19:34:51,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:51,277 INFO L225 Difference]: With dead ends: 962 [2018-11-28 19:34:51,277 INFO L226 Difference]: Without dead ends: 831 [2018-11-28 19:34:51,278 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2018-11-28 19:34:51,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2018-11-28 19:34:51,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 831. [2018-11-28 19:34:51,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2018-11-28 19:34:51,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1796 transitions. [2018-11-28 19:34:51,287 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1796 transitions. Word has length 89 [2018-11-28 19:34:51,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:51,287 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 1796 transitions. [2018-11-28 19:34:51,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-28 19:34:51,288 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1796 transitions. [2018-11-28 19:34:51,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-11-28 19:34:51,289 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:51,289 INFO L402 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:34:51,289 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:51,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:51,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1008893305, now seen corresponding path program 31 times [2018-11-28 19:34:51,290 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:51,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:51,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:51,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:51,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:51,679 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:51,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:51,679 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:34:51,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:34:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:51,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:51,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:51,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-11-28 19:34:51,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-28 19:34:51,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-28 19:34:51,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2018-11-28 19:34:51,817 INFO L87 Difference]: Start difference. First operand 831 states and 1796 transitions. Second operand 24 states. [2018-11-28 19:34:52,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:52,364 INFO L93 Difference]: Finished difference Result 978 states and 2139 transitions. [2018-11-28 19:34:52,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-28 19:34:52,372 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2018-11-28 19:34:52,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:52,375 INFO L225 Difference]: With dead ends: 978 [2018-11-28 19:34:52,376 INFO L226 Difference]: Without dead ends: 847 [2018-11-28 19:34:52,376 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=571, Invalid=1321, Unknown=0, NotChecked=0, Total=1892 [2018-11-28 19:34:52,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2018-11-28 19:34:52,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 556. [2018-11-28 19:34:52,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2018-11-28 19:34:52,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1246 transitions. [2018-11-28 19:34:52,387 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1246 transitions. Word has length 93 [2018-11-28 19:34:52,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:52,389 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 1246 transitions. [2018-11-28 19:34:52,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-28 19:34:52,390 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1246 transitions. [2018-11-28 19:34:52,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-11-28 19:34:52,391 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:52,391 INFO L402 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:34:52,391 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:52,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:52,391 INFO L82 PathProgramCache]: Analyzing trace with hash -265515347, now seen corresponding path program 32 times [2018-11-28 19:34:52,391 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:52,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:52,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:52,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:34:52,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:53,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:53,140 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:34:53,154 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 19:34:53,189 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 19:34:53,189 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:53,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:53,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:53,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-11-28 19:34:53,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-28 19:34:53,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-28 19:34:53,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2018-11-28 19:34:53,244 INFO L87 Difference]: Start difference. First operand 556 states and 1246 transitions. Second operand 24 states. [2018-11-28 19:34:53,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:53,814 INFO L93 Difference]: Finished difference Result 994 states and 2171 transitions. [2018-11-28 19:34:53,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-28 19:34:53,816 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2018-11-28 19:34:53,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:53,818 INFO L225 Difference]: With dead ends: 994 [2018-11-28 19:34:53,818 INFO L226 Difference]: Without dead ends: 863 [2018-11-28 19:34:53,819 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=536, Invalid=1356, Unknown=0, NotChecked=0, Total=1892 [2018-11-28 19:34:53,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2018-11-28 19:34:53,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 863. [2018-11-28 19:34:53,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 863 states. [2018-11-28 19:34:53,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1860 transitions. [2018-11-28 19:34:53,836 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1860 transitions. Word has length 93 [2018-11-28 19:34:53,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:53,836 INFO L480 AbstractCegarLoop]: Abstraction has 863 states and 1860 transitions. [2018-11-28 19:34:53,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-28 19:34:53,836 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1860 transitions. [2018-11-28 19:34:53,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-28 19:34:53,841 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:53,841 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:34:53,841 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:53,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:53,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1745970890, now seen corresponding path program 33 times [2018-11-28 19:34:53,842 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:53,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:53,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:53,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:53,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:54,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:34:54,150 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:34:54,167 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 19:34:54,206 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-28 19:34:54,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:34:54,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:34:54,271 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:54,300 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:34:54,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-11-28 19:34:54,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-28 19:34:54,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-28 19:34:54,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2018-11-28 19:34:54,301 INFO L87 Difference]: Start difference. First operand 863 states and 1860 transitions. Second operand 25 states. [2018-11-28 19:34:54,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:54,869 INFO L93 Difference]: Finished difference Result 1010 states and 2203 transitions. [2018-11-28 19:34:54,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-28 19:34:54,870 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2018-11-28 19:34:54,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:54,872 INFO L225 Difference]: With dead ends: 1010 [2018-11-28 19:34:54,872 INFO L226 Difference]: Without dead ends: 879 [2018-11-28 19:34:54,873 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=579, Invalid=1491, Unknown=0, NotChecked=0, Total=2070 [2018-11-28 19:34:54,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2018-11-28 19:34:54,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 572. [2018-11-28 19:34:54,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2018-11-28 19:34:54,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1278 transitions. [2018-11-28 19:34:54,882 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1278 transitions. Word has length 97 [2018-11-28 19:34:54,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:54,882 INFO L480 AbstractCegarLoop]: Abstraction has 572 states and 1278 transitions. [2018-11-28 19:34:54,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-28 19:34:54,882 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1278 transitions. [2018-11-28 19:34:54,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-28 19:34:54,883 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:54,884 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:34:54,884 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:54,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:54,884 INFO L82 PathProgramCache]: Analyzing trace with hash -510825526, now seen corresponding path program 34 times [2018-11-28 19:34:54,884 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:54,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:54,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:54,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:34:54,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 19:34:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 19:34:54,977 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-11-28 19:34:55,096 INFO L305 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-11-28 19:34:55,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:34:55 BasicIcfg [2018-11-28 19:34:55,100 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 19:34:55,100 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 19:34:55,100 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 19:34:55,100 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 19:34:55,104 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:34:21" (3/4) ... [2018-11-28 19:34:55,108 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-28 19:34:55,229 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-11-28 19:34:55,230 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 19:34:55,231 INFO L168 Benchmark]: Toolchain (without parser) took 34702.50 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 492.8 MB). Free memory was 952.7 MB in the beginning and 1.4 GB in the end (delta: -439.1 MB). Peak memory consumption was 53.8 MB. Max. memory is 11.5 GB. [2018-11-28 19:34:55,231 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 19:34:55,235 INFO L168 Benchmark]: CACSL2BoogieTranslator took 728.96 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 952.7 MB in the beginning and 1.1 GB in the end (delta: -156.6 MB). Peak memory consumption was 36.2 MB. Max. memory is 11.5 GB. [2018-11-28 19:34:55,235 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.88 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 19:34:55,236 INFO L168 Benchmark]: Boogie Preprocessor took 29.86 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 19:34:55,238 INFO L168 Benchmark]: RCFGBuilder took 538.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. [2018-11-28 19:34:55,242 INFO L168 Benchmark]: TraceAbstraction took 33217.51 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 351.3 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -319.8 MB). Peak memory consumption was 31.5 MB. Max. memory is 11.5 GB. [2018-11-28 19:34:55,242 INFO L168 Benchmark]: Witness Printer took 129.61 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 11.5 GB. [2018-11-28 19:34:55,250 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 728.96 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 952.7 MB in the beginning and 1.1 GB in the end (delta: -156.6 MB). Peak memory consumption was 36.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 52.88 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 29.86 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 538.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 33217.51 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 351.3 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -319.8 MB). Peak memory consumption was 31.5 MB. Max. memory is 11.5 GB. * Witness Printer took 129.61 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 688]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L660] -1 int i = 3, j = 6; VAL [i=3, j=6] [L678] -1 pthread_t id1, id2; VAL [i=3, j=6] [L679] FCALL, FORK -1 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L662] 0 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L680] FCALL, FORK -1 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L670] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=0] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=1] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=2] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=3] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=3] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=4] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=5] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=5] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=6] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=7] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=7] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=7] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=8] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=8] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=9] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L682] -1 int condI = i >= (2*10 +6); [L685] -1 int condJ = j >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L687] COND TRUE -1 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L688] -1 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 64 locations, 1 error locations. UNSAFE Result, 33.0s OverallTime, 40 OverallIterations, 10 TraceHistogramMax, 14.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2153 SDtfs, 10517 SDslu, 14630 SDs, 0 SdLazy, 2804 SolverSat, 1538 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3123 GetRequests, 2179 SyntacticMatches, 0 SemanticMatches, 944 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5096 ImplicationChecksByTransitivity, 20.9s 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: 0.4s AutomataMinimizationTime, 39 MinimizatonAttempts, 3088 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 13.6s InterpolantComputationTime, 4530 NumberOfCodeBlocks, 4530 NumberOfCodeBlocksAsserted, 171 NumberOfCheckSat, 4359 ConstructedInterpolants, 0 QuantifiedInterpolants, 883467 SizeOfPredicates, 499 NumberOfNonLiveVariables, 5322 ConjunctsInSsa, 612 ConjunctsInUnsatCore, 74 InterpolantComputations, 4 PerfectInterpolantSequences, 0/7176 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...