./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/pthread/triangular-longer_true-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2e94e6aa 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_true-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 37ab50eb35f71bc9dfb317209ba2fdf85cde6398 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-2e94e6a [2018-12-31 17:27:09,863 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-31 17:27:09,865 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-31 17:27:09,877 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-31 17:27:09,877 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-31 17:27:09,878 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-31 17:27:09,880 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-31 17:27:09,882 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-31 17:27:09,883 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-31 17:27:09,884 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-31 17:27:09,885 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-31 17:27:09,886 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-31 17:27:09,886 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-31 17:27:09,888 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-31 17:27:09,889 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-31 17:27:09,890 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-31 17:27:09,891 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-31 17:27:09,893 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-31 17:27:09,895 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-31 17:27:09,896 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-31 17:27:09,898 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-31 17:27:09,899 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-31 17:27:09,902 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-31 17:27:09,902 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-31 17:27:09,902 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-31 17:27:09,903 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-31 17:27:09,905 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-31 17:27:09,906 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-31 17:27:09,907 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-31 17:27:09,908 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-31 17:27:09,908 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-31 17:27:09,909 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-31 17:27:09,909 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-31 17:27:09,909 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-31 17:27:09,911 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-31 17:27:09,912 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-31 17:27:09,912 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-31 17:27:09,928 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-31 17:27:09,928 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-31 17:27:09,930 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-31 17:27:09,930 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-31 17:27:09,930 INFO L133 SettingsManager]: * Use SBE=true [2018-12-31 17:27:09,930 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-31 17:27:09,930 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-31 17:27:09,931 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-31 17:27:09,931 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-31 17:27:09,931 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-31 17:27:09,931 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-31 17:27:09,931 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-31 17:27:09,931 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-31 17:27:09,933 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-31 17:27:09,933 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-31 17:27:09,933 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-31 17:27:09,933 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-31 17:27:09,933 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-31 17:27:09,934 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-31 17:27:09,934 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-31 17:27:09,934 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-31 17:27:09,935 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 17:27:09,935 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-31 17:27:09,935 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-31 17:27:09,935 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-31 17:27:09,935 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-31 17:27:09,936 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-31 17:27:09,936 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-31 17:27:09,936 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 -> 37ab50eb35f71bc9dfb317209ba2fdf85cde6398 [2018-12-31 17:27:09,974 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-31 17:27:09,987 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-31 17:27:09,991 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-31 17:27:09,992 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-31 17:27:09,993 INFO L276 PluginConnector]: CDTParser initialized [2018-12-31 17:27:09,994 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/pthread/triangular-longer_true-unreach-call.i [2018-12-31 17:27:10,052 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7965821a9/697e038c92794c8ea934e466eecfda80/FLAG6f994c1e6 [2018-12-31 17:27:10,622 INFO L307 CDTParser]: Found 1 translation units. [2018-12-31 17:27:10,623 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/pthread/triangular-longer_true-unreach-call.i [2018-12-31 17:27:10,645 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7965821a9/697e038c92794c8ea934e466eecfda80/FLAG6f994c1e6 [2018-12-31 17:27:10,872 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7965821a9/697e038c92794c8ea934e466eecfda80 [2018-12-31 17:27:10,876 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-31 17:27:10,878 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-31 17:27:10,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-31 17:27:10,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-31 17:27:10,886 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-31 17:27:10,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 05:27:10" (1/1) ... [2018-12-31 17:27:10,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15156f27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:27:10, skipping insertion in model container [2018-12-31 17:27:10,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 05:27:10" (1/1) ... [2018-12-31 17:27:10,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-31 17:27:10,943 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-31 17:27:11,385 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 17:27:11,397 INFO L191 MainTranslator]: Completed pre-run [2018-12-31 17:27:11,475 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 17:27:11,667 INFO L195 MainTranslator]: Completed translation [2018-12-31 17:27:11,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:27:11 WrapperNode [2018-12-31 17:27:11,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-31 17:27:11,668 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-31 17:27:11,669 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-31 17:27:11,669 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-31 17:27:11,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:27:11" (1/1) ... [2018-12-31 17:27:11,703 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:27:11" (1/1) ... [2018-12-31 17:27:11,733 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-31 17:27:11,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-31 17:27:11,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-31 17:27:11,733 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-31 17:27:11,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:27:11" (1/1) ... [2018-12-31 17:27:11,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:27:11" (1/1) ... [2018-12-31 17:27:11,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:27:11" (1/1) ... [2018-12-31 17:27:11,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:27:11" (1/1) ... [2018-12-31 17:27:11,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:27:11" (1/1) ... [2018-12-31 17:27:11,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:27:11" (1/1) ... [2018-12-31 17:27:11,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:27:11" (1/1) ... [2018-12-31 17:27:11,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-31 17:27:11,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-31 17:27:11,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-31 17:27:11,787 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-31 17:27:11,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:27:11" (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 [2018-12-31 17:27:11,857 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2018-12-31 17:27:11,857 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2018-12-31 17:27:11,857 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2018-12-31 17:27:11,857 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2018-12-31 17:27:11,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-31 17:27:11,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2018-12-31 17:27:11,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2018-12-31 17:27:11,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-31 17:27:11,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2018-12-31 17:27:11,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-31 17:27:11,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-31 17:27:11,863 WARN L198 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2018-12-31 17:27:12,390 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-31 17:27:12,390 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-12-31 17:27:12,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 05:27:12 BoogieIcfgContainer [2018-12-31 17:27:12,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-31 17:27:12,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-31 17:27:12,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-31 17:27:12,395 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-31 17:27:12,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.12 05:27:10" (1/3) ... [2018-12-31 17:27:12,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60425a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 05:27:12, skipping insertion in model container [2018-12-31 17:27:12,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:27:11" (2/3) ... [2018-12-31 17:27:12,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60425a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 05:27:12, skipping insertion in model container [2018-12-31 17:27:12,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 05:27:12" (3/3) ... [2018-12-31 17:27:12,398 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer_true-unreach-call.i [2018-12-31 17:27:12,432 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,432 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,432 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,432 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,433 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,433 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,433 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,436 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,436 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,436 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,436 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,437 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,437 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,437 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,439 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,439 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,439 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,439 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,439 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,440 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,440 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,440 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,440 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,442 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,443 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,443 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,443 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,444 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:27:12,468 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-12-31 17:27:12,468 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-31 17:27:12,476 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-31 17:27:12,495 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-31 17:27:12,520 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-31 17:27:12,520 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-31 17:27:12,521 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-31 17:27:12,521 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-31 17:27:12,521 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-31 17:27:12,521 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-31 17:27:12,521 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-31 17:27:12,521 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-31 17:27:12,521 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-31 17:27:12,530 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46places, 48 transitions [2018-12-31 17:27:12,594 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2018-12-31 17:27:12,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2018-12-31 17:27:12,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-31 17:27:12,609 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:12,610 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 17:27:12,612 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:12,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:12,619 INFO L82 PathProgramCache]: Analyzing trace with hash 573491188, now seen corresponding path program 1 times [2018-12-31 17:27:12,621 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:12,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:12,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:12,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:27:12,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:12,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:12,997 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 17:27:12,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-31 17:27:13,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-31 17:27:13,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-31 17:27:13,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-31 17:27:13,019 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2018-12-31 17:27:13,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:13,276 INFO L93 Difference]: Finished difference Result 1411 states and 4051 transitions. [2018-12-31 17:27:13,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-31 17:27:13,278 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-12-31 17:27:13,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:13,303 INFO L225 Difference]: With dead ends: 1411 [2018-12-31 17:27:13,304 INFO L226 Difference]: Without dead ends: 322 [2018-12-31 17:27:13,305 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-31 17:27:13,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2018-12-31 17:27:13,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2018-12-31 17:27:13,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-12-31 17:27:13,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 820 transitions. [2018-12-31 17:27:13,384 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 820 transitions. Word has length 19 [2018-12-31 17:27:13,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:13,385 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 820 transitions. [2018-12-31 17:27:13,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-31 17:27:13,385 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 820 transitions. [2018-12-31 17:27:13,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-31 17:27:13,388 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:13,388 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 17:27:13,388 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:13,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:13,389 INFO L82 PathProgramCache]: Analyzing trace with hash -158111408, now seen corresponding path program 1 times [2018-12-31 17:27:13,389 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:13,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:13,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:13,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:27:13,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:13,648 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 17:27:13,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-31 17:27:13,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-31 17:27:13,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-31 17:27:13,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-31 17:27:13,653 INFO L87 Difference]: Start difference. First operand 322 states and 820 transitions. Second operand 5 states. [2018-12-31 17:27:13,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:13,850 INFO L93 Difference]: Finished difference Result 411 states and 998 transitions. [2018-12-31 17:27:13,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-31 17:27:13,851 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-12-31 17:27:13,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:13,855 INFO L225 Difference]: With dead ends: 411 [2018-12-31 17:27:13,855 INFO L226 Difference]: Without dead ends: 290 [2018-12-31 17:27:13,856 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 [2018-12-31 17:27:13,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-12-31 17:27:13,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2018-12-31 17:27:13,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-12-31 17:27:13,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2018-12-31 17:27:13,875 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2018-12-31 17:27:13,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:13,876 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2018-12-31 17:27:13,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-31 17:27:13,876 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2018-12-31 17:27:13,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-31 17:27:13,879 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:13,879 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 17:27:13,879 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:13,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:13,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1832836244, now seen corresponding path program 1 times [2018-12-31 17:27:13,880 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:13,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:13,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:13,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:27:13,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:13,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:14,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:14,065 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 17:27:14,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-31 17:27:14,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-31 17:27:14,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-31 17:27:14,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-31 17:27:14,066 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2018-12-31 17:27:14,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:14,194 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2018-12-31 17:27:14,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-31 17:27:14,197 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-31 17:27:14,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:14,201 INFO L225 Difference]: With dead ends: 437 [2018-12-31 17:27:14,201 INFO L226 Difference]: Without dead ends: 300 [2018-12-31 17:27:14,202 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-31 17:27:14,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2018-12-31 17:27:14,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 287. [2018-12-31 17:27:14,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-12-31 17:27:14,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 708 transitions. [2018-12-31 17:27:14,233 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 708 transitions. Word has length 25 [2018-12-31 17:27:14,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:14,233 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 708 transitions. [2018-12-31 17:27:14,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-31 17:27:14,233 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 708 transitions. [2018-12-31 17:27:14,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-31 17:27:14,235 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:14,235 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 17:27:14,235 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:14,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:14,236 INFO L82 PathProgramCache]: Analyzing trace with hash 28324926, now seen corresponding path program 2 times [2018-12-31 17:27:14,236 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:14,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:14,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:14,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:27:14,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:14,486 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 17:27:14,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-31 17:27:14,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-31 17:27:14,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-31 17:27:14,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-31 17:27:14,488 INFO L87 Difference]: Start difference. First operand 287 states and 708 transitions. Second operand 6 states. [2018-12-31 17:27:14,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:14,649 INFO L93 Difference]: Finished difference Result 447 states and 1077 transitions. [2018-12-31 17:27:14,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-31 17:27:14,651 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-31 17:27:14,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:14,654 INFO L225 Difference]: With dead ends: 447 [2018-12-31 17:27:14,654 INFO L226 Difference]: Without dead ends: 319 [2018-12-31 17:27:14,655 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 [2018-12-31 17:27:14,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-12-31 17:27:14,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-12-31 17:27:14,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-12-31 17:27:14,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2018-12-31 17:27:14,673 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2018-12-31 17:27:14,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:14,674 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2018-12-31 17:27:14,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-31 17:27:14,674 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2018-12-31 17:27:14,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-31 17:27:14,679 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:14,680 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 17:27:14,680 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:14,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:14,680 INFO L82 PathProgramCache]: Analyzing trace with hash -390066897, now seen corresponding path program 1 times [2018-12-31 17:27:14,680 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:14,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:14,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:14,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:14,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:14,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:15,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:15,022 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 [2018-12-31 17:27:15,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:27:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:15,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:15,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:15,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:15,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-12-31 17:27:15,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-31 17:27:15,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-31 17:27:15,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-12-31 17:27:15,235 INFO L87 Difference]: Start difference. First operand 319 states and 772 transitions. Second operand 8 states. [2018-12-31 17:27:15,483 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-12-31 17:27:15,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:15,638 INFO L93 Difference]: Finished difference Result 466 states and 1115 transitions. [2018-12-31 17:27:15,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-31 17:27:15,639 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-12-31 17:27:15,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:15,643 INFO L225 Difference]: With dead ends: 466 [2018-12-31 17:27:15,643 INFO L226 Difference]: Without dead ends: 335 [2018-12-31 17:27:15,644 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-12-31 17:27:15,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-12-31 17:27:15,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 297. [2018-12-31 17:27:15,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2018-12-31 17:27:15,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 728 transitions. [2018-12-31 17:27:15,663 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 728 transitions. Word has length 29 [2018-12-31 17:27:15,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:15,664 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 728 transitions. [2018-12-31 17:27:15,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-31 17:27:15,664 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 728 transitions. [2018-12-31 17:27:15,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-31 17:27:15,672 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:15,673 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 17:27:15,673 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:15,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:15,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1592611961, now seen corresponding path program 1 times [2018-12-31 17:27:15,674 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:15,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:15,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:15,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:27:15,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:15,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:15,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:15,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:15,878 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 [2018-12-31 17:27:15,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:27:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:15,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:16,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:16,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-12-31 17:27:16,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-31 17:27:16,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-31 17:27:16,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-12-31 17:27:16,087 INFO L87 Difference]: Start difference. First operand 297 states and 728 transitions. Second operand 8 states. [2018-12-31 17:27:16,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:16,351 INFO L93 Difference]: Finished difference Result 482 states and 1147 transitions. [2018-12-31 17:27:16,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-31 17:27:16,352 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-12-31 17:27:16,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:16,355 INFO L225 Difference]: With dead ends: 482 [2018-12-31 17:27:16,356 INFO L226 Difference]: Without dead ends: 351 [2018-12-31 17:27:16,356 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-12-31 17:27:16,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-12-31 17:27:16,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-12-31 17:27:16,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-12-31 17:27:16,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 836 transitions. [2018-12-31 17:27:16,369 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 836 transitions. Word has length 29 [2018-12-31 17:27:16,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:16,370 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 836 transitions. [2018-12-31 17:27:16,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-31 17:27:16,370 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 836 transitions. [2018-12-31 17:27:16,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-31 17:27:16,372 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:16,373 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 17:27:16,373 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:16,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:16,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1331288396, now seen corresponding path program 1 times [2018-12-31 17:27:16,373 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:16,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:16,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:16,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:27:16,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:16,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:16,688 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:16,688 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 [2018-12-31 17:27:16,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:27:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:16,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:16,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:16,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:16,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-12-31 17:27:16,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-31 17:27:16,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-31 17:27:16,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-12-31 17:27:16,820 INFO L87 Difference]: Start difference. First operand 351 states and 836 transitions. Second operand 9 states. [2018-12-31 17:27:17,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:17,139 INFO L93 Difference]: Finished difference Result 498 states and 1179 transitions. [2018-12-31 17:27:17,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-31 17:27:17,141 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-12-31 17:27:17,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:17,143 INFO L225 Difference]: With dead ends: 498 [2018-12-31 17:27:17,144 INFO L226 Difference]: Without dead ends: 367 [2018-12-31 17:27:17,144 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-12-31 17:27:17,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-12-31 17:27:17,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 313. [2018-12-31 17:27:17,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2018-12-31 17:27:17,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 760 transitions. [2018-12-31 17:27:17,153 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 760 transitions. Word has length 33 [2018-12-31 17:27:17,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:17,153 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 760 transitions. [2018-12-31 17:27:17,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-31 17:27:17,153 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 760 transitions. [2018-12-31 17:27:17,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-31 17:27:17,154 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:17,154 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 17:27:17,155 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:17,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:17,155 INFO L82 PathProgramCache]: Analyzing trace with hash -460714038, now seen corresponding path program 2 times [2018-12-31 17:27:17,155 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:17,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:17,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:17,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:27:17,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:17,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:17,258 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 [2018-12-31 17:27:17,280 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 17:27:17,305 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 17:27:17,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:17,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:17,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:17,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:17,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-12-31 17:27:17,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-31 17:27:17,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-31 17:27:17,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-12-31 17:27:17,462 INFO L87 Difference]: Start difference. First operand 313 states and 760 transitions. Second operand 9 states. [2018-12-31 17:27:17,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:17,725 INFO L93 Difference]: Finished difference Result 514 states and 1211 transitions. [2018-12-31 17:27:17,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-31 17:27:17,726 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-12-31 17:27:17,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:17,730 INFO L225 Difference]: With dead ends: 514 [2018-12-31 17:27:17,730 INFO L226 Difference]: Without dead ends: 383 [2018-12-31 17:27:17,730 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-12-31 17:27:17,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-12-31 17:27:17,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2018-12-31 17:27:17,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-12-31 17:27:17,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 900 transitions. [2018-12-31 17:27:17,740 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 900 transitions. Word has length 33 [2018-12-31 17:27:17,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:17,740 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 900 transitions. [2018-12-31 17:27:17,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-31 17:27:17,740 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 900 transitions. [2018-12-31 17:27:17,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-31 17:27:17,741 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:17,741 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 17:27:17,742 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:17,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:17,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1672817905, now seen corresponding path program 3 times [2018-12-31 17:27:17,742 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:17,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:17,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:17,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:17,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:17,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:17,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:17,874 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 [2018-12-31 17:27:17,887 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 17:27:17,923 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-31 17:27:17,923 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:17,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:17,995 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:17,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-12-31 17:27:17,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-31 17:27:17,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-31 17:27:17,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-12-31 17:27:17,996 INFO L87 Difference]: Start difference. First operand 383 states and 900 transitions. Second operand 10 states. [2018-12-31 17:27:18,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:18,206 INFO L93 Difference]: Finished difference Result 530 states and 1243 transitions. [2018-12-31 17:27:18,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-31 17:27:18,211 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-12-31 17:27:18,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:18,215 INFO L225 Difference]: With dead ends: 530 [2018-12-31 17:27:18,215 INFO L226 Difference]: Without dead ends: 399 [2018-12-31 17:27:18,215 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2018-12-31 17:27:18,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-12-31 17:27:18,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 329. [2018-12-31 17:27:18,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2018-12-31 17:27:18,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 792 transitions. [2018-12-31 17:27:18,225 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 792 transitions. Word has length 37 [2018-12-31 17:27:18,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:18,227 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 792 transitions. [2018-12-31 17:27:18,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-31 17:27:18,227 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 792 transitions. [2018-12-31 17:27:18,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-31 17:27:18,228 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:18,229 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 17:27:18,229 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:18,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:18,229 INFO L82 PathProgramCache]: Analyzing trace with hash 2061178471, now seen corresponding path program 4 times [2018-12-31 17:27:18,229 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:18,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:18,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:18,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:18,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:18,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:18,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:18,415 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 [2018-12-31 17:27:18,428 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 17:27:18,462 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 17:27:18,462 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:18,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:18,527 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:18,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-12-31 17:27:18,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-31 17:27:18,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-31 17:27:18,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-12-31 17:27:18,528 INFO L87 Difference]: Start difference. First operand 329 states and 792 transitions. Second operand 10 states. [2018-12-31 17:27:18,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:18,679 INFO L93 Difference]: Finished difference Result 546 states and 1275 transitions. [2018-12-31 17:27:18,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-31 17:27:18,680 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-12-31 17:27:18,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:18,684 INFO L225 Difference]: With dead ends: 546 [2018-12-31 17:27:18,684 INFO L226 Difference]: Without dead ends: 415 [2018-12-31 17:27:18,684 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2018-12-31 17:27:18,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2018-12-31 17:27:18,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2018-12-31 17:27:18,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2018-12-31 17:27:18,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 964 transitions. [2018-12-31 17:27:18,694 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 964 transitions. Word has length 37 [2018-12-31 17:27:18,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:18,694 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 964 transitions. [2018-12-31 17:27:18,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-31 17:27:18,694 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 964 transitions. [2018-12-31 17:27:18,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-31 17:27:18,695 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:18,695 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 17:27:18,696 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:18,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:18,696 INFO L82 PathProgramCache]: Analyzing trace with hash 307146540, now seen corresponding path program 5 times [2018-12-31 17:27:18,696 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:18,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:18,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:18,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:18,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:18,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:18,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:18,909 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 [2018-12-31 17:27:18,926 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 17:27:18,947 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-12-31 17:27:18,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:18,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:19,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:19,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:19,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-12-31 17:27:19,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-31 17:27:19,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-31 17:27:19,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-12-31 17:27:19,069 INFO L87 Difference]: Start difference. First operand 415 states and 964 transitions. Second operand 11 states. [2018-12-31 17:27:19,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:19,345 INFO L93 Difference]: Finished difference Result 562 states and 1307 transitions. [2018-12-31 17:27:19,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-31 17:27:19,347 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-12-31 17:27:19,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:19,350 INFO L225 Difference]: With dead ends: 562 [2018-12-31 17:27:19,351 INFO L226 Difference]: Without dead ends: 431 [2018-12-31 17:27:19,351 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2018-12-31 17:27:19,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-12-31 17:27:19,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 345. [2018-12-31 17:27:19,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2018-12-31 17:27:19,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 824 transitions. [2018-12-31 17:27:19,361 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 824 transitions. Word has length 41 [2018-12-31 17:27:19,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:19,363 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 824 transitions. [2018-12-31 17:27:19,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-31 17:27:19,363 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 824 transitions. [2018-12-31 17:27:19,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-31 17:27:19,364 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:19,364 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 17:27:19,364 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:19,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:19,364 INFO L82 PathProgramCache]: Analyzing trace with hash 2086800042, now seen corresponding path program 6 times [2018-12-31 17:27:19,364 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:19,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:19,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:19,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:19,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:19,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:19,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:19,529 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 [2018-12-31 17:27:19,544 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 17:27:19,566 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-12-31 17:27:19,566 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:19,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:19,631 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:19,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-12-31 17:27:19,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-31 17:27:19,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-31 17:27:19,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-12-31 17:27:19,632 INFO L87 Difference]: Start difference. First operand 345 states and 824 transitions. Second operand 11 states. [2018-12-31 17:27:19,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:19,823 INFO L93 Difference]: Finished difference Result 578 states and 1339 transitions. [2018-12-31 17:27:19,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-31 17:27:19,824 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-12-31 17:27:19,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:19,827 INFO L225 Difference]: With dead ends: 578 [2018-12-31 17:27:19,827 INFO L226 Difference]: Without dead ends: 447 [2018-12-31 17:27:19,828 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-12-31 17:27:19,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-12-31 17:27:19,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2018-12-31 17:27:19,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-12-31 17:27:19,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1028 transitions. [2018-12-31 17:27:19,838 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1028 transitions. Word has length 41 [2018-12-31 17:27:19,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:19,838 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1028 transitions. [2018-12-31 17:27:19,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-31 17:27:19,838 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1028 transitions. [2018-12-31 17:27:19,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-31 17:27:19,839 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:19,839 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 17:27:19,839 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:19,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:19,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1960724241, now seen corresponding path program 7 times [2018-12-31 17:27:19,840 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:19,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:19,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:19,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:19,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:20,249 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:20,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:20,249 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 [2018-12-31 17:27:20,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:27:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:20,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:20,552 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:20,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-12-31 17:27:20,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-31 17:27:20,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-31 17:27:20,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-12-31 17:27:20,553 INFO L87 Difference]: Start difference. First operand 447 states and 1028 transitions. Second operand 12 states. [2018-12-31 17:27:21,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:21,244 INFO L93 Difference]: Finished difference Result 594 states and 1371 transitions. [2018-12-31 17:27:21,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-31 17:27:21,245 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-12-31 17:27:21,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:21,248 INFO L225 Difference]: With dead ends: 594 [2018-12-31 17:27:21,248 INFO L226 Difference]: Without dead ends: 463 [2018-12-31 17:27:21,249 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2018-12-31 17:27:21,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2018-12-31 17:27:21,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 361. [2018-12-31 17:27:21,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2018-12-31 17:27:21,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 856 transitions. [2018-12-31 17:27:21,258 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 856 transitions. Word has length 45 [2018-12-31 17:27:21,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:21,258 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 856 transitions. [2018-12-31 17:27:21,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-31 17:27:21,258 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 856 transitions. [2018-12-31 17:27:21,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-31 17:27:21,259 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:21,259 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 17:27:21,259 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:21,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:21,259 INFO L82 PathProgramCache]: Analyzing trace with hash 511353159, now seen corresponding path program 8 times [2018-12-31 17:27:21,260 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:21,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:21,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:21,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:27:21,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:21,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:21,437 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 [2018-12-31 17:27:21,450 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 17:27:21,475 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 17:27:21,475 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:21,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:21,521 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:21,544 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:21,544 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-12-31 17:27:21,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-31 17:27:21,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-31 17:27:21,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-12-31 17:27:21,545 INFO L87 Difference]: Start difference. First operand 361 states and 856 transitions. Second operand 12 states. [2018-12-31 17:27:21,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:21,763 INFO L93 Difference]: Finished difference Result 610 states and 1403 transitions. [2018-12-31 17:27:21,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-31 17:27:21,768 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-12-31 17:27:21,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:21,771 INFO L225 Difference]: With dead ends: 610 [2018-12-31 17:27:21,772 INFO L226 Difference]: Without dead ends: 479 [2018-12-31 17:27:21,772 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2018-12-31 17:27:21,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-12-31 17:27:21,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2018-12-31 17:27:21,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-12-31 17:27:21,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1092 transitions. [2018-12-31 17:27:21,784 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1092 transitions. Word has length 45 [2018-12-31 17:27:21,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:21,785 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 1092 transitions. [2018-12-31 17:27:21,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-31 17:27:21,785 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1092 transitions. [2018-12-31 17:27:21,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-31 17:27:21,788 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:21,788 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 17:27:21,788 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:21,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:21,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1300210956, now seen corresponding path program 9 times [2018-12-31 17:27:21,790 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:21,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:21,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:21,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:21,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:21,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:21,971 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 [2018-12-31 17:27:21,989 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 17:27:22,016 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-31 17:27:22,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:22,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:22,099 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:22,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:22,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-12-31 17:27:22,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-31 17:27:22,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-31 17:27:22,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-12-31 17:27:22,123 INFO L87 Difference]: Start difference. First operand 479 states and 1092 transitions. Second operand 13 states. [2018-12-31 17:27:22,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:22,463 INFO L93 Difference]: Finished difference Result 626 states and 1435 transitions. [2018-12-31 17:27:22,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-31 17:27:22,464 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-12-31 17:27:22,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:22,468 INFO L225 Difference]: With dead ends: 626 [2018-12-31 17:27:22,468 INFO L226 Difference]: Without dead ends: 495 [2018-12-31 17:27:22,469 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2018-12-31 17:27:22,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-12-31 17:27:22,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 377. [2018-12-31 17:27:22,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2018-12-31 17:27:22,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 888 transitions. [2018-12-31 17:27:22,477 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 888 transitions. Word has length 49 [2018-12-31 17:27:22,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:22,477 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 888 transitions. [2018-12-31 17:27:22,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-31 17:27:22,478 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 888 transitions. [2018-12-31 17:27:22,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-31 17:27:22,478 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:22,478 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 17:27:22,479 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:22,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:22,479 INFO L82 PathProgramCache]: Analyzing trace with hash -578738806, now seen corresponding path program 10 times [2018-12-31 17:27:22,479 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:22,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:22,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:22,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:22,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:22,668 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:22,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:22,668 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 [2018-12-31 17:27:22,680 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 17:27:22,723 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 17:27:22,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:22,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:22,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:22,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-12-31 17:27:22,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-31 17:27:22,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-31 17:27:22,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-12-31 17:27:22,837 INFO L87 Difference]: Start difference. First operand 377 states and 888 transitions. Second operand 13 states. [2018-12-31 17:27:23,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:23,087 INFO L93 Difference]: Finished difference Result 642 states and 1467 transitions. [2018-12-31 17:27:23,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-31 17:27:23,088 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-12-31 17:27:23,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:23,090 INFO L225 Difference]: With dead ends: 642 [2018-12-31 17:27:23,090 INFO L226 Difference]: Without dead ends: 511 [2018-12-31 17:27:23,091 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2018-12-31 17:27:23,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2018-12-31 17:27:23,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2018-12-31 17:27:23,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2018-12-31 17:27:23,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1156 transitions. [2018-12-31 17:27:23,099 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1156 transitions. Word has length 49 [2018-12-31 17:27:23,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:23,100 INFO L480 AbstractCegarLoop]: Abstraction has 511 states and 1156 transitions. [2018-12-31 17:27:23,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-31 17:27:23,100 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1156 transitions. [2018-12-31 17:27:23,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-31 17:27:23,101 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:23,101 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 17:27:23,101 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:23,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:23,102 INFO L82 PathProgramCache]: Analyzing trace with hash 925155023, now seen corresponding path program 11 times [2018-12-31 17:27:23,102 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:23,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:23,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:23,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:23,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:23,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:23,413 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 [2018-12-31 17:27:23,425 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 17:27:23,494 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-12-31 17:27:23,494 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:23,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:23,547 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:23,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-12-31 17:27:23,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-31 17:27:23,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-31 17:27:23,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-12-31 17:27:23,548 INFO L87 Difference]: Start difference. First operand 511 states and 1156 transitions. Second operand 14 states. [2018-12-31 17:27:23,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:23,898 INFO L93 Difference]: Finished difference Result 658 states and 1499 transitions. [2018-12-31 17:27:23,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-31 17:27:23,899 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-12-31 17:27:23,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:23,901 INFO L225 Difference]: With dead ends: 658 [2018-12-31 17:27:23,901 INFO L226 Difference]: Without dead ends: 527 [2018-12-31 17:27:23,902 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2018-12-31 17:27:23,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2018-12-31 17:27:23,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 393. [2018-12-31 17:27:23,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2018-12-31 17:27:23,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 920 transitions. [2018-12-31 17:27:23,912 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 920 transitions. Word has length 53 [2018-12-31 17:27:23,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:23,913 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 920 transitions. [2018-12-31 17:27:23,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-31 17:27:23,913 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 920 transitions. [2018-12-31 17:27:23,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-31 17:27:23,914 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:23,914 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 17:27:23,914 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:23,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:23,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1389448231, now seen corresponding path program 12 times [2018-12-31 17:27:23,915 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:23,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:23,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:23,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:23,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:24,130 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:24,130 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 [2018-12-31 17:27:24,142 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 17:27:24,166 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-12-31 17:27:24,166 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:24,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:24,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:24,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-12-31 17:27:24,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-31 17:27:24,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-31 17:27:24,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-12-31 17:27:24,339 INFO L87 Difference]: Start difference. First operand 393 states and 920 transitions. Second operand 14 states. [2018-12-31 17:27:24,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:24,617 INFO L93 Difference]: Finished difference Result 674 states and 1531 transitions. [2018-12-31 17:27:24,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-31 17:27:24,619 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-12-31 17:27:24,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:24,622 INFO L225 Difference]: With dead ends: 674 [2018-12-31 17:27:24,623 INFO L226 Difference]: Without dead ends: 543 [2018-12-31 17:27:24,623 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2018-12-31 17:27:24,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-12-31 17:27:24,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2018-12-31 17:27:24,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2018-12-31 17:27:24,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1220 transitions. [2018-12-31 17:27:24,633 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1220 transitions. Word has length 53 [2018-12-31 17:27:24,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:24,633 INFO L480 AbstractCegarLoop]: Abstraction has 543 states and 1220 transitions. [2018-12-31 17:27:24,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-31 17:27:24,633 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1220 transitions. [2018-12-31 17:27:24,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-31 17:27:24,634 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:24,634 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 17:27:24,635 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:24,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:24,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1832076564, now seen corresponding path program 13 times [2018-12-31 17:27:24,635 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:24,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:24,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:24,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:24,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:24,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:24,910 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:24,910 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 [2018-12-31 17:27:24,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:27:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:24,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:25,036 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:25,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:25,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-12-31 17:27:25,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-31 17:27:25,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-31 17:27:25,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-12-31 17:27:25,058 INFO L87 Difference]: Start difference. First operand 543 states and 1220 transitions. Second operand 15 states. [2018-12-31 17:27:25,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:25,314 INFO L93 Difference]: Finished difference Result 690 states and 1563 transitions. [2018-12-31 17:27:25,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-31 17:27:25,315 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-12-31 17:27:25,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:25,319 INFO L225 Difference]: With dead ends: 690 [2018-12-31 17:27:25,319 INFO L226 Difference]: Without dead ends: 559 [2018-12-31 17:27:25,319 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 [2018-12-31 17:27:25,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2018-12-31 17:27:25,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 409. [2018-12-31 17:27:25,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2018-12-31 17:27:25,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 952 transitions. [2018-12-31 17:27:25,327 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 952 transitions. Word has length 57 [2018-12-31 17:27:25,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:25,327 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 952 transitions. [2018-12-31 17:27:25,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-31 17:27:25,328 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 952 transitions. [2018-12-31 17:27:25,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-31 17:27:25,328 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:25,329 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 17:27:25,329 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:25,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:25,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1590124650, now seen corresponding path program 14 times [2018-12-31 17:27:25,329 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:25,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:25,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:25,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:27:25,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:26,067 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:26,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:26,068 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 [2018-12-31 17:27:26,080 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 17:27:26,122 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 17:27:26,122 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:26,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:26,205 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:26,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:26,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-12-31 17:27:26,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-31 17:27:26,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-31 17:27:26,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-12-31 17:27:26,227 INFO L87 Difference]: Start difference. First operand 409 states and 952 transitions. Second operand 15 states. [2018-12-31 17:27:26,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:26,514 INFO L93 Difference]: Finished difference Result 706 states and 1595 transitions. [2018-12-31 17:27:26,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-31 17:27:26,516 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-12-31 17:27:26,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:26,518 INFO L225 Difference]: With dead ends: 706 [2018-12-31 17:27:26,519 INFO L226 Difference]: Without dead ends: 575 [2018-12-31 17:27:26,519 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2018-12-31 17:27:26,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2018-12-31 17:27:26,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2018-12-31 17:27:26,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2018-12-31 17:27:26,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1284 transitions. [2018-12-31 17:27:26,530 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1284 transitions. Word has length 57 [2018-12-31 17:27:26,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:26,531 INFO L480 AbstractCegarLoop]: Abstraction has 575 states and 1284 transitions. [2018-12-31 17:27:26,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-31 17:27:26,531 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1284 transitions. [2018-12-31 17:27:26,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-31 17:27:26,532 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:26,532 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] [2018-12-31 17:27:26,535 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:26,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:26,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1110697135, now seen corresponding path program 15 times [2018-12-31 17:27:26,536 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:26,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:26,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:26,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:26,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:26,773 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:26,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:26,773 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 [2018-12-31 17:27:26,784 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 17:27:26,827 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-31 17:27:26,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:26,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:26,870 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:26,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:26,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-12-31 17:27:26,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-31 17:27:26,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-31 17:27:26,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-12-31 17:27:26,890 INFO L87 Difference]: Start difference. First operand 575 states and 1284 transitions. Second operand 16 states. [2018-12-31 17:27:27,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:27,170 INFO L93 Difference]: Finished difference Result 722 states and 1627 transitions. [2018-12-31 17:27:27,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-31 17:27:27,177 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2018-12-31 17:27:27,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:27,181 INFO L225 Difference]: With dead ends: 722 [2018-12-31 17:27:27,181 INFO L226 Difference]: Without dead ends: 591 [2018-12-31 17:27:27,182 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2018-12-31 17:27:27,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2018-12-31 17:27:27,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 425. [2018-12-31 17:27:27,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2018-12-31 17:27:27,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 984 transitions. [2018-12-31 17:27:27,190 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 984 transitions. Word has length 61 [2018-12-31 17:27:27,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:27,191 INFO L480 AbstractCegarLoop]: Abstraction has 425 states and 984 transitions. [2018-12-31 17:27:27,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-31 17:27:27,191 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 984 transitions. [2018-12-31 17:27:27,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-31 17:27:27,192 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:27,192 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] [2018-12-31 17:27:27,192 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:27,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:27,193 INFO L82 PathProgramCache]: Analyzing trace with hash -21031161, now seen corresponding path program 16 times [2018-12-31 17:27:27,196 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:27,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:27,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:27,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:27,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:27,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:27,519 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:27,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:27,519 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 [2018-12-31 17:27:27,531 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 17:27:27,559 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 17:27:27,559 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:27,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:27,588 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:27,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:27,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-12-31 17:27:27,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-31 17:27:27,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-31 17:27:27,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-12-31 17:27:27,608 INFO L87 Difference]: Start difference. First operand 425 states and 984 transitions. Second operand 16 states. [2018-12-31 17:27:27,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:27,978 INFO L93 Difference]: Finished difference Result 738 states and 1659 transitions. [2018-12-31 17:27:27,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-31 17:27:27,979 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2018-12-31 17:27:27,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:27,982 INFO L225 Difference]: With dead ends: 738 [2018-12-31 17:27:27,983 INFO L226 Difference]: Without dead ends: 607 [2018-12-31 17:27:27,983 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2018-12-31 17:27:27,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2018-12-31 17:27:27,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2018-12-31 17:27:27,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2018-12-31 17:27:27,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1348 transitions. [2018-12-31 17:27:27,993 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1348 transitions. Word has length 61 [2018-12-31 17:27:27,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:27,993 INFO L480 AbstractCegarLoop]: Abstraction has 607 states and 1348 transitions. [2018-12-31 17:27:27,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-31 17:27:27,994 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1348 transitions. [2018-12-31 17:27:27,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-12-31 17:27:27,998 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:27,998 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] [2018-12-31 17:27:27,998 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:27,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:27,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1810501428, now seen corresponding path program 17 times [2018-12-31 17:27:27,999 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:27,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:28,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:28,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:28,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:28,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:28,288 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 [2018-12-31 17:27:28,300 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 17:27:28,329 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-12-31 17:27:28,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:28,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:28,393 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:28,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:28,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-12-31 17:27:28,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-31 17:27:28,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-31 17:27:28,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-12-31 17:27:28,415 INFO L87 Difference]: Start difference. First operand 607 states and 1348 transitions. Second operand 17 states. [2018-12-31 17:27:28,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:28,728 INFO L93 Difference]: Finished difference Result 754 states and 1691 transitions. [2018-12-31 17:27:28,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-31 17:27:28,730 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2018-12-31 17:27:28,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:28,734 INFO L225 Difference]: With dead ends: 754 [2018-12-31 17:27:28,734 INFO L226 Difference]: Without dead ends: 623 [2018-12-31 17:27:28,734 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 [2018-12-31 17:27:28,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2018-12-31 17:27:28,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 441. [2018-12-31 17:27:28,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2018-12-31 17:27:28,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1016 transitions. [2018-12-31 17:27:28,743 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1016 transitions. Word has length 65 [2018-12-31 17:27:28,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:28,744 INFO L480 AbstractCegarLoop]: Abstraction has 441 states and 1016 transitions. [2018-12-31 17:27:28,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-31 17:27:28,744 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1016 transitions. [2018-12-31 17:27:28,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-12-31 17:27:28,745 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:28,745 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] [2018-12-31 17:27:28,748 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:28,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:28,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1997847370, now seen corresponding path program 18 times [2018-12-31 17:27:28,748 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:28,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:28,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:28,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:28,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:28,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:28,989 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 [2018-12-31 17:27:29,002 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 17:27:29,096 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-12-31 17:27:29,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:29,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:29,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:29,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-12-31 17:27:29,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-31 17:27:29,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-31 17:27:29,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-12-31 17:27:29,316 INFO L87 Difference]: Start difference. First operand 441 states and 1016 transitions. Second operand 17 states. [2018-12-31 17:27:29,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:29,756 INFO L93 Difference]: Finished difference Result 770 states and 1723 transitions. [2018-12-31 17:27:29,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-31 17:27:29,757 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2018-12-31 17:27:29,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:29,760 INFO L225 Difference]: With dead ends: 770 [2018-12-31 17:27:29,760 INFO L226 Difference]: Without dead ends: 639 [2018-12-31 17:27:29,761 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=245, Invalid=625, Unknown=0, NotChecked=0, Total=870 [2018-12-31 17:27:29,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2018-12-31 17:27:29,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 639. [2018-12-31 17:27:29,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 639 states. [2018-12-31 17:27:29,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1412 transitions. [2018-12-31 17:27:29,771 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1412 transitions. Word has length 65 [2018-12-31 17:27:29,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:29,771 INFO L480 AbstractCegarLoop]: Abstraction has 639 states and 1412 transitions. [2018-12-31 17:27:29,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-31 17:27:29,772 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1412 transitions. [2018-12-31 17:27:29,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-31 17:27:29,775 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:29,775 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] [2018-12-31 17:27:29,775 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:29,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:29,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1848584847, now seen corresponding path program 19 times [2018-12-31 17:27:29,776 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:29,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:29,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:29,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:29,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:30,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:30,041 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 [2018-12-31 17:27:30,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:27:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:30,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:30,188 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:30,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-12-31 17:27:30,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-31 17:27:30,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-31 17:27:30,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2018-12-31 17:27:30,189 INFO L87 Difference]: Start difference. First operand 639 states and 1412 transitions. Second operand 18 states. [2018-12-31 17:27:30,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:30,498 INFO L93 Difference]: Finished difference Result 786 states and 1755 transitions. [2018-12-31 17:27:30,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-31 17:27:30,499 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2018-12-31 17:27:30,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:30,502 INFO L225 Difference]: With dead ends: 786 [2018-12-31 17:27:30,502 INFO L226 Difference]: Without dead ends: 655 [2018-12-31 17:27:30,503 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=282, Invalid=648, Unknown=0, NotChecked=0, Total=930 [2018-12-31 17:27:30,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2018-12-31 17:27:30,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 457. [2018-12-31 17:27:30,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2018-12-31 17:27:30,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1048 transitions. [2018-12-31 17:27:30,510 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1048 transitions. Word has length 69 [2018-12-31 17:27:30,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:30,510 INFO L480 AbstractCegarLoop]: Abstraction has 457 states and 1048 transitions. [2018-12-31 17:27:30,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-31 17:27:30,510 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1048 transitions. [2018-12-31 17:27:30,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-31 17:27:30,511 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:30,511 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] [2018-12-31 17:27:30,511 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:30,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:30,512 INFO L82 PathProgramCache]: Analyzing trace with hash 690225639, now seen corresponding path program 20 times [2018-12-31 17:27:30,512 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:30,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:30,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:30,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:27:30,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:30,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:30,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:30,922 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 [2018-12-31 17:27:30,934 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 17:27:30,957 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 17:27:30,957 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:30,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:31,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:31,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-12-31 17:27:31,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-31 17:27:31,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-31 17:27:31,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2018-12-31 17:27:31,025 INFO L87 Difference]: Start difference. First operand 457 states and 1048 transitions. Second operand 18 states. [2018-12-31 17:27:31,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:31,368 INFO L93 Difference]: Finished difference Result 802 states and 1787 transitions. [2018-12-31 17:27:31,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-31 17:27:31,369 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2018-12-31 17:27:31,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:31,373 INFO L225 Difference]: With dead ends: 802 [2018-12-31 17:27:31,373 INFO L226 Difference]: Without dead ends: 671 [2018-12-31 17:27:31,374 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2018-12-31 17:27:31,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2018-12-31 17:27:31,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 671. [2018-12-31 17:27:31,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 671 states. [2018-12-31 17:27:31,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1476 transitions. [2018-12-31 17:27:31,383 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1476 transitions. Word has length 69 [2018-12-31 17:27:31,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:31,384 INFO L480 AbstractCegarLoop]: Abstraction has 671 states and 1476 transitions. [2018-12-31 17:27:31,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-31 17:27:31,384 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1476 transitions. [2018-12-31 17:27:31,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-31 17:27:31,387 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:31,387 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] [2018-12-31 17:27:31,387 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:31,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:31,387 INFO L82 PathProgramCache]: Analyzing trace with hash 591087276, now seen corresponding path program 21 times [2018-12-31 17:27:31,388 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:31,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:31,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:31,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:31,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:31,593 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:31,594 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 [2018-12-31 17:27:31,605 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 17:27:31,636 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-12-31 17:27:31,636 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:31,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:31,708 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:31,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:31,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-12-31 17:27:31,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-31 17:27:31,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-31 17:27:31,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2018-12-31 17:27:31,728 INFO L87 Difference]: Start difference. First operand 671 states and 1476 transitions. Second operand 19 states. [2018-12-31 17:27:32,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:32,138 INFO L93 Difference]: Finished difference Result 818 states and 1819 transitions. [2018-12-31 17:27:32,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-31 17:27:32,139 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2018-12-31 17:27:32,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:32,144 INFO L225 Difference]: With dead ends: 818 [2018-12-31 17:27:32,144 INFO L226 Difference]: Without dead ends: 687 [2018-12-31 17:27:32,145 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 [2018-12-31 17:27:32,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2018-12-31 17:27:32,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 473. [2018-12-31 17:27:32,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 473 states. [2018-12-31 17:27:32,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1080 transitions. [2018-12-31 17:27:32,153 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1080 transitions. Word has length 73 [2018-12-31 17:27:32,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:32,154 INFO L480 AbstractCegarLoop]: Abstraction has 473 states and 1080 transitions. [2018-12-31 17:27:32,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-31 17:27:32,154 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1080 transitions. [2018-12-31 17:27:32,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-31 17:27:32,155 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:32,155 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] [2018-12-31 17:27:32,155 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:32,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:32,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1119275478, now seen corresponding path program 22 times [2018-12-31 17:27:32,155 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:32,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:32,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:32,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:32,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:32,376 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:32,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:32,376 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 [2018-12-31 17:27:32,388 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 17:27:32,417 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 17:27:32,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:32,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:32,455 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:32,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:32,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-12-31 17:27:32,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-31 17:27:32,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-31 17:27:32,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2018-12-31 17:27:32,474 INFO L87 Difference]: Start difference. First operand 473 states and 1080 transitions. Second operand 19 states. [2018-12-31 17:27:32,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:32,852 INFO L93 Difference]: Finished difference Result 834 states and 1851 transitions. [2018-12-31 17:27:32,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-31 17:27:32,853 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2018-12-31 17:27:32,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:32,857 INFO L225 Difference]: With dead ends: 834 [2018-12-31 17:27:32,857 INFO L226 Difference]: Without dead ends: 703 [2018-12-31 17:27:32,858 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2018-12-31 17:27:32,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2018-12-31 17:27:32,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 703. [2018-12-31 17:27:32,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2018-12-31 17:27:32,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1540 transitions. [2018-12-31 17:27:32,866 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1540 transitions. Word has length 73 [2018-12-31 17:27:32,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:32,867 INFO L480 AbstractCegarLoop]: Abstraction has 703 states and 1540 transitions. [2018-12-31 17:27:32,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-31 17:27:32,867 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1540 transitions. [2018-12-31 17:27:32,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-12-31 17:27:32,868 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:32,869 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] [2018-12-31 17:27:32,869 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:32,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:32,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1661562769, now seen corresponding path program 23 times [2018-12-31 17:27:32,869 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:32,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:32,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:32,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:32,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:33,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:33,109 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 [2018-12-31 17:27:33,120 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 17:27:33,153 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-12-31 17:27:33,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:33,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:33,307 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:33,326 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:33,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-12-31 17:27:33,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-31 17:27:33,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-31 17:27:33,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2018-12-31 17:27:33,327 INFO L87 Difference]: Start difference. First operand 703 states and 1540 transitions. Second operand 20 states. [2018-12-31 17:27:33,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:33,793 INFO L93 Difference]: Finished difference Result 850 states and 1883 transitions. [2018-12-31 17:27:33,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-31 17:27:33,794 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 77 [2018-12-31 17:27:33,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:33,798 INFO L225 Difference]: With dead ends: 850 [2018-12-31 17:27:33,799 INFO L226 Difference]: Without dead ends: 719 [2018-12-31 17:27:33,799 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=361, Invalid=829, Unknown=0, NotChecked=0, Total=1190 [2018-12-31 17:27:33,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2018-12-31 17:27:33,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 489. [2018-12-31 17:27:33,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2018-12-31 17:27:33,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1112 transitions. [2018-12-31 17:27:33,807 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1112 transitions. Word has length 77 [2018-12-31 17:27:33,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:33,808 INFO L480 AbstractCegarLoop]: Abstraction has 489 states and 1112 transitions. [2018-12-31 17:27:33,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-31 17:27:33,808 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1112 transitions. [2018-12-31 17:27:33,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-12-31 17:27:33,809 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:33,809 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] [2018-12-31 17:27:33,809 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:33,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:33,809 INFO L82 PathProgramCache]: Analyzing trace with hash -119534393, now seen corresponding path program 24 times [2018-12-31 17:27:33,810 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:33,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:33,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:33,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:33,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:34,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:34,075 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 [2018-12-31 17:27:34,086 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 17:27:34,213 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-12-31 17:27:34,213 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:34,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:34,337 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:34,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-12-31 17:27:34,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-31 17:27:34,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-31 17:27:34,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2018-12-31 17:27:34,338 INFO L87 Difference]: Start difference. First operand 489 states and 1112 transitions. Second operand 20 states. [2018-12-31 17:27:34,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:34,803 INFO L93 Difference]: Finished difference Result 866 states and 1915 transitions. [2018-12-31 17:27:34,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-31 17:27:34,805 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 77 [2018-12-31 17:27:34,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:34,809 INFO L225 Difference]: With dead ends: 866 [2018-12-31 17:27:34,809 INFO L226 Difference]: Without dead ends: 735 [2018-12-31 17:27:34,810 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=379, Invalid=881, Unknown=0, NotChecked=0, Total=1260 [2018-12-31 17:27:34,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2018-12-31 17:27:34,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 735. [2018-12-31 17:27:34,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 735 states. [2018-12-31 17:27:34,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1604 transitions. [2018-12-31 17:27:34,819 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1604 transitions. Word has length 77 [2018-12-31 17:27:34,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:34,819 INFO L480 AbstractCegarLoop]: Abstraction has 735 states and 1604 transitions. [2018-12-31 17:27:34,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-31 17:27:34,819 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1604 transitions. [2018-12-31 17:27:34,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-12-31 17:27:34,821 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:34,821 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] [2018-12-31 17:27:34,821 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:34,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:34,822 INFO L82 PathProgramCache]: Analyzing trace with hash 840744076, now seen corresponding path program 25 times [2018-12-31 17:27:34,822 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:34,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:34,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:34,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:34,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:35,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:35,029 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 [2018-12-31 17:27:35,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:27:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:35,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:35,138 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:35,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-12-31 17:27:35,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-31 17:27:35,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-31 17:27:35,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2018-12-31 17:27:35,140 INFO L87 Difference]: Start difference. First operand 735 states and 1604 transitions. Second operand 21 states. [2018-12-31 17:27:35,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:35,568 INFO L93 Difference]: Finished difference Result 882 states and 1947 transitions. [2018-12-31 17:27:35,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-31 17:27:35,569 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2018-12-31 17:27:35,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:35,573 INFO L225 Difference]: With dead ends: 882 [2018-12-31 17:27:35,574 INFO L226 Difference]: Without dead ends: 751 [2018-12-31 17:27:35,574 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 [2018-12-31 17:27:35,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2018-12-31 17:27:35,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 505. [2018-12-31 17:27:35,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2018-12-31 17:27:35,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1144 transitions. [2018-12-31 17:27:35,583 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1144 transitions. Word has length 81 [2018-12-31 17:27:35,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:35,584 INFO L480 AbstractCegarLoop]: Abstraction has 505 states and 1144 transitions. [2018-12-31 17:27:35,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-31 17:27:35,584 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1144 transitions. [2018-12-31 17:27:35,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-12-31 17:27:35,585 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:35,585 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] [2018-12-31 17:27:35,585 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:35,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:35,586 INFO L82 PathProgramCache]: Analyzing trace with hash -398143222, now seen corresponding path program 26 times [2018-12-31 17:27:35,586 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:35,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:35,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:35,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:27:35,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:35,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:35,934 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:35,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:35,935 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 [2018-12-31 17:27:35,954 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 17:27:35,983 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 17:27:35,983 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:35,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:36,037 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:36,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-12-31 17:27:36,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-31 17:27:36,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-31 17:27:36,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2018-12-31 17:27:36,038 INFO L87 Difference]: Start difference. First operand 505 states and 1144 transitions. Second operand 21 states. [2018-12-31 17:27:36,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:36,447 INFO L93 Difference]: Finished difference Result 898 states and 1979 transitions. [2018-12-31 17:27:36,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-31 17:27:36,448 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2018-12-31 17:27:36,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:36,451 INFO L225 Difference]: With dead ends: 898 [2018-12-31 17:27:36,451 INFO L226 Difference]: Without dead ends: 767 [2018-12-31 17:27:36,452 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=394, Invalid=1012, Unknown=0, NotChecked=0, Total=1406 [2018-12-31 17:27:36,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2018-12-31 17:27:36,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2018-12-31 17:27:36,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2018-12-31 17:27:36,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1668 transitions. [2018-12-31 17:27:36,463 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1668 transitions. Word has length 81 [2018-12-31 17:27:36,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:36,463 INFO L480 AbstractCegarLoop]: Abstraction has 767 states and 1668 transitions. [2018-12-31 17:27:36,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-31 17:27:36,463 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1668 transitions. [2018-12-31 17:27:36,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-12-31 17:27:36,465 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:36,465 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] [2018-12-31 17:27:36,465 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:36,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:36,465 INFO L82 PathProgramCache]: Analyzing trace with hash -798353841, now seen corresponding path program 27 times [2018-12-31 17:27:36,465 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:36,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:36,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:36,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:36,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:36,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:36,814 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 [2018-12-31 17:27:36,826 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 17:27:36,926 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-31 17:27:36,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:36,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:37,013 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:37,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-12-31 17:27:37,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-31 17:27:37,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-31 17:27:37,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2018-12-31 17:27:37,016 INFO L87 Difference]: Start difference. First operand 767 states and 1668 transitions. Second operand 22 states. [2018-12-31 17:27:37,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:37,488 INFO L93 Difference]: Finished difference Result 914 states and 2011 transitions. [2018-12-31 17:27:37,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-31 17:27:37,490 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 85 [2018-12-31 17:27:37,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:37,494 INFO L225 Difference]: With dead ends: 914 [2018-12-31 17:27:37,494 INFO L226 Difference]: Without dead ends: 783 [2018-12-31 17:27:37,496 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=443, Invalid=1117, Unknown=0, NotChecked=0, Total=1560 [2018-12-31 17:27:37,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2018-12-31 17:27:37,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 521. [2018-12-31 17:27:37,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2018-12-31 17:27:37,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1176 transitions. [2018-12-31 17:27:37,504 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1176 transitions. Word has length 85 [2018-12-31 17:27:37,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:37,505 INFO L480 AbstractCegarLoop]: Abstraction has 521 states and 1176 transitions. [2018-12-31 17:27:37,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-31 17:27:37,505 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1176 transitions. [2018-12-31 17:27:37,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-12-31 17:27:37,506 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:37,506 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] [2018-12-31 17:27:37,506 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:37,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:37,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1261226073, now seen corresponding path program 28 times [2018-12-31 17:27:37,509 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:37,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:37,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:37,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:37,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:37,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:37,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:37,923 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-31 17:27:37,935 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 17:27:37,968 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 17:27:37,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:37,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:38,013 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:38,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:38,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-12-31 17:27:38,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-31 17:27:38,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-31 17:27:38,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2018-12-31 17:27:38,032 INFO L87 Difference]: Start difference. First operand 521 states and 1176 transitions. Second operand 22 states. [2018-12-31 17:27:38,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:38,478 INFO L93 Difference]: Finished difference Result 930 states and 2043 transitions. [2018-12-31 17:27:38,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-31 17:27:38,479 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 85 [2018-12-31 17:27:38,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:38,484 INFO L225 Difference]: With dead ends: 930 [2018-12-31 17:27:38,484 INFO L226 Difference]: Without dead ends: 799 [2018-12-31 17:27:38,485 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=470, Invalid=1090, Unknown=0, NotChecked=0, Total=1560 [2018-12-31 17:27:38,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2018-12-31 17:27:38,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 799. [2018-12-31 17:27:38,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 799 states. [2018-12-31 17:27:38,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1732 transitions. [2018-12-31 17:27:38,497 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1732 transitions. Word has length 85 [2018-12-31 17:27:38,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:38,497 INFO L480 AbstractCegarLoop]: Abstraction has 799 states and 1732 transitions. [2018-12-31 17:27:38,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-31 17:27:38,497 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1732 transitions. [2018-12-31 17:27:38,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-12-31 17:27:38,499 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:38,499 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] [2018-12-31 17:27:38,499 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:38,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:38,500 INFO L82 PathProgramCache]: Analyzing trace with hash -761638292, now seen corresponding path program 29 times [2018-12-31 17:27:38,500 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:38,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:38,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:38,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:38,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:38,797 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:38,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:38,798 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 [2018-12-31 17:27:38,809 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 17:27:38,845 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-12-31 17:27:38,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:38,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:38,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:38,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-12-31 17:27:38,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-31 17:27:38,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-31 17:27:38,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2018-12-31 17:27:38,898 INFO L87 Difference]: Start difference. First operand 799 states and 1732 transitions. Second operand 23 states. [2018-12-31 17:27:39,370 WARN L181 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2018-12-31 17:27:39,998 WARN L181 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2018-12-31 17:27:40,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:40,278 INFO L93 Difference]: Finished difference Result 946 states and 2075 transitions. [2018-12-31 17:27:40,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-31 17:27:40,279 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 89 [2018-12-31 17:27:40,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:40,283 INFO L225 Difference]: With dead ends: 946 [2018-12-31 17:27:40,283 INFO L226 Difference]: Without dead ends: 815 [2018-12-31 17:27:40,284 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2018-12-31 17:27:40,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2018-12-31 17:27:40,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 537. [2018-12-31 17:27:40,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2018-12-31 17:27:40,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1208 transitions. [2018-12-31 17:27:40,296 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1208 transitions. Word has length 89 [2018-12-31 17:27:40,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:40,296 INFO L480 AbstractCegarLoop]: Abstraction has 537 states and 1208 transitions. [2018-12-31 17:27:40,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-31 17:27:40,296 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1208 transitions. [2018-12-31 17:27:40,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-12-31 17:27:40,297 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:40,298 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] [2018-12-31 17:27:40,298 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:40,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:40,298 INFO L82 PathProgramCache]: Analyzing trace with hash -823686166, now seen corresponding path program 30 times [2018-12-31 17:27:40,298 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:40,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:40,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:40,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:40,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:40,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:40,799 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 [2018-12-31 17:27:40,811 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 17:27:40,846 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-12-31 17:27:40,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:40,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:40,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:40,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-12-31 17:27:40,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-31 17:27:40,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-31 17:27:40,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2018-12-31 17:27:40,917 INFO L87 Difference]: Start difference. First operand 537 states and 1208 transitions. Second operand 23 states. [2018-12-31 17:27:41,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:41,407 INFO L93 Difference]: Finished difference Result 962 states and 2107 transitions. [2018-12-31 17:27:41,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-31 17:27:41,408 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 89 [2018-12-31 17:27:41,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:41,412 INFO L225 Difference]: With dead ends: 962 [2018-12-31 17:27:41,413 INFO L226 Difference]: Without dead ends: 831 [2018-12-31 17:27:41,414 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=482, Invalid=1240, Unknown=0, NotChecked=0, Total=1722 [2018-12-31 17:27:41,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2018-12-31 17:27:41,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 831. [2018-12-31 17:27:41,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2018-12-31 17:27:41,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1796 transitions. [2018-12-31 17:27:41,427 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1796 transitions. Word has length 89 [2018-12-31 17:27:41,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:41,428 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 1796 transitions. [2018-12-31 17:27:41,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-31 17:27:41,428 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1796 transitions. [2018-12-31 17:27:41,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-12-31 17:27:41,430 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:41,430 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] [2018-12-31 17:27:41,430 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:41,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:41,430 INFO L82 PathProgramCache]: Analyzing trace with hash 711572527, now seen corresponding path program 31 times [2018-12-31 17:27:41,430 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:41,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:41,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:41,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:41,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:41,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:41,933 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 [2018-12-31 17:27:41,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:27:41,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:41,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:42,061 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:42,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-12-31 17:27:42,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-31 17:27:42,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-31 17:27:42,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2018-12-31 17:27:42,063 INFO L87 Difference]: Start difference. First operand 831 states and 1796 transitions. Second operand 24 states. [2018-12-31 17:27:42,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:42,578 INFO L93 Difference]: Finished difference Result 978 states and 2139 transitions. [2018-12-31 17:27:42,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-31 17:27:42,580 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2018-12-31 17:27:42,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:42,583 INFO L225 Difference]: With dead ends: 978 [2018-12-31 17:27:42,583 INFO L226 Difference]: Without dead ends: 847 [2018-12-31 17:27:42,584 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=549, Invalid=1257, Unknown=0, NotChecked=0, Total=1806 [2018-12-31 17:27:42,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2018-12-31 17:27:42,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 553. [2018-12-31 17:27:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2018-12-31 17:27:42,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1240 transitions. [2018-12-31 17:27:42,596 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1240 transitions. Word has length 93 [2018-12-31 17:27:42,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:42,597 INFO L480 AbstractCegarLoop]: Abstraction has 553 states and 1240 transitions. [2018-12-31 17:27:42,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-31 17:27:42,597 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1240 transitions. [2018-12-31 17:27:42,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-12-31 17:27:42,598 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:42,598 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] [2018-12-31 17:27:42,598 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:42,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:42,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1008893305, now seen corresponding path program 32 times [2018-12-31 17:27:42,599 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:42,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:42,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:42,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:27:42,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:42,863 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:42,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:42,863 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 [2018-12-31 17:27:42,876 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 17:27:42,908 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 17:27:42,909 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:42,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:42,964 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:42,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-12-31 17:27:42,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-31 17:27:42,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-31 17:27:42,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2018-12-31 17:27:42,965 INFO L87 Difference]: Start difference. First operand 553 states and 1240 transitions. Second operand 24 states. [2018-12-31 17:27:43,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:43,513 INFO L93 Difference]: Finished difference Result 994 states and 2171 transitions. [2018-12-31 17:27:43,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-31 17:27:43,514 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2018-12-31 17:27:43,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:43,517 INFO L225 Difference]: With dead ends: 994 [2018-12-31 17:27:43,517 INFO L226 Difference]: Without dead ends: 863 [2018-12-31 17:27:43,518 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=571, Invalid=1321, Unknown=0, NotChecked=0, Total=1892 [2018-12-31 17:27:43,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2018-12-31 17:27:43,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 863. [2018-12-31 17:27:43,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 863 states. [2018-12-31 17:27:43,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1860 transitions. [2018-12-31 17:27:43,529 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1860 transitions. Word has length 93 [2018-12-31 17:27:43,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:43,529 INFO L480 AbstractCegarLoop]: Abstraction has 863 states and 1860 transitions. [2018-12-31 17:27:43,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-31 17:27:43,529 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1860 transitions. [2018-12-31 17:27:43,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-12-31 17:27:43,532 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:43,532 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] [2018-12-31 17:27:43,532 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:43,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:43,533 INFO L82 PathProgramCache]: Analyzing trace with hash 915671116, now seen corresponding path program 33 times [2018-12-31 17:27:43,533 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:43,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:43,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:43,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:43,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:43,820 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:43,821 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 [2018-12-31 17:27:43,831 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 17:27:43,867 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-12-31 17:27:43,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:43,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:43,918 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:43,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:43,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-12-31 17:27:43,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-31 17:27:43,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-31 17:27:43,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2018-12-31 17:27:43,945 INFO L87 Difference]: Start difference. First operand 863 states and 1860 transitions. Second operand 25 states. [2018-12-31 17:27:44,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:44,572 INFO L93 Difference]: Finished difference Result 1010 states and 2203 transitions. [2018-12-31 17:27:44,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-12-31 17:27:44,573 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2018-12-31 17:27:44,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:44,575 INFO L225 Difference]: With dead ends: 1010 [2018-12-31 17:27:44,575 INFO L226 Difference]: Without dead ends: 879 [2018-12-31 17:27:44,576 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=626, Invalid=1444, Unknown=0, NotChecked=0, Total=2070 [2018-12-31 17:27:44,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2018-12-31 17:27:44,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 569. [2018-12-31 17:27:44,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2018-12-31 17:27:44,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1272 transitions. [2018-12-31 17:27:44,586 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1272 transitions. Word has length 97 [2018-12-31 17:27:44,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:44,586 INFO L480 AbstractCegarLoop]: Abstraction has 569 states and 1272 transitions. [2018-12-31 17:27:44,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-31 17:27:44,586 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1272 transitions. [2018-12-31 17:27:44,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-12-31 17:27:44,587 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:44,587 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] [2018-12-31 17:27:44,587 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:44,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:44,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1745970890, now seen corresponding path program 34 times [2018-12-31 17:27:44,588 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:44,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:44,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:44,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:44,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:45,245 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:45,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:45,245 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:27:45,257 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 17:27:45,288 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 17:27:45,288 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:45,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:45,369 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:27:45,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-12-31 17:27:45,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-31 17:27:45,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-31 17:27:45,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2018-12-31 17:27:45,371 INFO L87 Difference]: Start difference. First operand 569 states and 1272 transitions. Second operand 25 states. [2018-12-31 17:27:45,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:45,942 INFO L93 Difference]: Finished difference Result 1026 states and 2235 transitions. [2018-12-31 17:27:45,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-12-31 17:27:45,943 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2018-12-31 17:27:45,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:45,945 INFO L225 Difference]: With dead ends: 1026 [2018-12-31 17:27:45,945 INFO L226 Difference]: Without dead ends: 895 [2018-12-31 17:27:45,946 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=643, Invalid=1427, Unknown=0, NotChecked=0, Total=2070 [2018-12-31 17:27:45,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2018-12-31 17:27:45,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 895. [2018-12-31 17:27:45,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 895 states. [2018-12-31 17:27:45,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1924 transitions. [2018-12-31 17:27:45,956 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1924 transitions. Word has length 97 [2018-12-31 17:27:45,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:45,957 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 1924 transitions. [2018-12-31 17:27:45,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-31 17:27:45,957 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1924 transitions. [2018-12-31 17:27:45,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-12-31 17:27:45,958 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:45,958 INFO L402 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 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] [2018-12-31 17:27:45,958 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:45,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:45,959 INFO L82 PathProgramCache]: Analyzing trace with hash -321551857, now seen corresponding path program 35 times [2018-12-31 17:27:45,959 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:45,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:45,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:45,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:45,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:45,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 282 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:46,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:46,801 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:27:46,817 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 17:27:46,863 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-12-31 17:27:46,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:46,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:46,932 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-31 17:27:46,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2018-12-31 17:27:46,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-31 17:27:46,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-31 17:27:46,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2018-12-31 17:27:46,933 INFO L87 Difference]: Start difference. First operand 895 states and 1924 transitions. Second operand 25 states. [2018-12-31 17:27:47,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:47,408 INFO L93 Difference]: Finished difference Result 3847 states and 7639 transitions. [2018-12-31 17:27:47,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-12-31 17:27:47,410 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 101 [2018-12-31 17:27:47,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:47,411 INFO L225 Difference]: With dead ends: 3847 [2018-12-31 17:27:47,412 INFO L226 Difference]: Without dead ends: 555 [2018-12-31 17:27:47,413 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=575, Invalid=1405, Unknown=0, NotChecked=0, Total=1980 [2018-12-31 17:27:47,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2018-12-31 17:27:47,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2018-12-31 17:27:47,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 555 states. [2018-12-31 17:27:47,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1170 transitions. [2018-12-31 17:27:47,420 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1170 transitions. Word has length 101 [2018-12-31 17:27:47,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:47,420 INFO L480 AbstractCegarLoop]: Abstraction has 555 states and 1170 transitions. [2018-12-31 17:27:47,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-31 17:27:47,420 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1170 transitions. [2018-12-31 17:27:47,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-12-31 17:27:47,421 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:27:47,421 INFO L402 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 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] [2018-12-31 17:27:47,422 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:27:47,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:27:47,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1394676377, now seen corresponding path program 36 times [2018-12-31 17:27:47,422 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:27:47,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:27:47,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:47,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:27:47,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:27:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:27:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 315 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:48,461 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:27:48,462 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:27:48,475 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 17:27:48,516 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-12-31 17:27:48,516 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:27:48,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:27:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:27:49,030 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-31 17:27:49,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2018-12-31 17:27:49,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-31 17:27:49,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-31 17:27:49,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2018-12-31 17:27:49,031 INFO L87 Difference]: Start difference. First operand 555 states and 1170 transitions. Second operand 25 states. [2018-12-31 17:27:50,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:27:50,719 INFO L93 Difference]: Finished difference Result 1763 states and 3205 transitions. [2018-12-31 17:27:50,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-12-31 17:27:50,721 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 101 [2018-12-31 17:27:50,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:27:50,721 INFO L225 Difference]: With dead ends: 1763 [2018-12-31 17:27:50,721 INFO L226 Difference]: Without dead ends: 0 [2018-12-31 17:27:50,722 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=575, Invalid=1405, Unknown=0, NotChecked=0, Total=1980 [2018-12-31 17:27:50,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-31 17:27:50,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-31 17:27:50,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-31 17:27:50,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-31 17:27:50,723 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 101 [2018-12-31 17:27:50,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:27:50,723 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-31 17:27:50,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-31 17:27:50,724 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-31 17:27:50,724 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-31 17:27:50,727 INFO L305 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-12-31 17:27:50,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.12 05:27:50 BasicIcfg [2018-12-31 17:27:50,729 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-31 17:27:50,729 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-31 17:27:50,730 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-31 17:27:50,730 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-31 17:27:50,730 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 05:27:12" (3/4) ... [2018-12-31 17:27:50,734 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-31 17:27:50,741 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2018-12-31 17:27:50,741 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2018-12-31 17:27:50,745 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-12-31 17:27:50,745 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-12-31 17:27:50,745 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-31 17:27:50,787 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-12-31 17:27:50,787 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-31 17:27:50,788 INFO L168 Benchmark]: Toolchain (without parser) took 39911.67 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 459.8 MB). Free memory was 952.7 MB in the beginning and 953.7 MB in the end (delta: -945.9 kB). Peak memory consumption was 458.9 MB. Max. memory is 11.5 GB. [2018-12-31 17:27:50,789 INFO L168 Benchmark]: CDTParser took 0.44 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. [2018-12-31 17:27:50,789 INFO L168 Benchmark]: CACSL2BoogieTranslator took 786.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.6 MB). Free memory was 952.7 MB in the beginning and 1.1 GB in the end (delta: -156.0 MB). Peak memory consumption was 39.0 MB. Max. memory is 11.5 GB. [2018-12-31 17:27:50,793 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.38 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2018-12-31 17:27:50,793 INFO L168 Benchmark]: Boogie Preprocessor took 53.12 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2018-12-31 17:27:50,794 INFO L168 Benchmark]: RCFGBuilder took 604.14 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 11.5 GB. [2018-12-31 17:27:50,794 INFO L168 Benchmark]: TraceAbstraction took 38337.48 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 338.2 MB). Free memory was 1.1 GB in the beginning and 954.2 MB in the end (delta: 122.1 MB). Peak memory consumption was 460.2 MB. Max. memory is 11.5 GB. [2018-12-31 17:27:50,797 INFO L168 Benchmark]: Witness Printer took 57.76 ms. Allocated memory is still 1.5 GB. Free memory was 954.2 MB in the beginning and 953.7 MB in the end (delta: 508.2 kB). Peak memory consumption was 508.2 kB. Max. memory is 11.5 GB. [2018-12-31 17:27:50,802 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 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 786.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.6 MB). Free memory was 952.7 MB in the beginning and 1.1 GB in the end (delta: -156.0 MB). Peak memory consumption was 39.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 64.38 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 53.12 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 604.14 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 38337.48 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 338.2 MB). Free memory was 1.1 GB in the beginning and 954.2 MB in the end (delta: 122.1 MB). Peak memory consumption was 460.2 MB. Max. memory is 11.5 GB. * Witness Printer took 57.76 ms. Allocated memory is still 1.5 GB. Free memory was 954.2 MB in the beginning and 953.7 MB in the end (delta: 508.2 kB). Peak memory consumption was 508.2 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 688]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 64 locations, 1 error locations. SAFE Result, 38.2s OverallTime, 42 OverallIterations, 11 TraceHistogramMax, 17.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2568 SDtfs, 11547 SDslu, 16321 SDs, 0 SdLazy, 3273 SolverSat, 1681 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3588 GetRequests, 2516 SyntacticMatches, 0 SemanticMatches, 1072 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 24.7s 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, 42 MinimizatonAttempts, 3145 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 16.0s InterpolantComputationTime, 5031 NumberOfCodeBlocks, 5031 NumberOfCodeBlocksAsserted, 197 NumberOfCheckSat, 4951 ConstructedInterpolants, 0 QuantifiedInterpolants, 1042639 SizeOfPredicates, 564 NumberOfNonLiveVariables, 6080 ConjunctsInSsa, 683 ConjunctsInUnsatCore, 80 InterpolantComputations, 6 PerfectInterpolantSequences, 1283/9160 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...