./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/pthread/triangular-longest_false-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-longest_false-unreach-call.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 70d0a39df19098c1cc382c782d0d39487b2971fb .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-2e94e6a [2018-12-31 17:24:45,038 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-31 17:24:45,040 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-31 17:24:45,052 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-31 17:24:45,052 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-31 17:24:45,053 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-31 17:24:45,054 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-31 17:24:45,056 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-31 17:24:45,058 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-31 17:24:45,058 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-31 17:24:45,059 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-31 17:24:45,060 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-31 17:24:45,061 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-31 17:24:45,061 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-31 17:24:45,063 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-31 17:24:45,063 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-31 17:24:45,064 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-31 17:24:45,066 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-31 17:24:45,068 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-31 17:24:45,069 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-31 17:24:45,070 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-31 17:24:45,072 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-31 17:24:45,074 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-31 17:24:45,074 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-31 17:24:45,075 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-31 17:24:45,076 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-31 17:24:45,077 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-31 17:24:45,077 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-31 17:24:45,078 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-31 17:24:45,079 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-31 17:24:45,079 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-31 17:24:45,080 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-31 17:24:45,080 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-31 17:24:45,081 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-31 17:24:45,082 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-31 17:24:45,082 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-31 17:24:45,083 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-31 17:24:45,098 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-31 17:24:45,098 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-31 17:24:45,099 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-31 17:24:45,099 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-31 17:24:45,100 INFO L133 SettingsManager]: * Use SBE=true [2018-12-31 17:24:45,100 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-31 17:24:45,100 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-31 17:24:45,100 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-31 17:24:45,100 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-31 17:24:45,100 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-31 17:24:45,101 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-31 17:24:45,101 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-31 17:24:45,101 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-31 17:24:45,101 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-31 17:24:45,101 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-31 17:24:45,101 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-31 17:24:45,102 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-31 17:24:45,102 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-31 17:24:45,102 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-31 17:24:45,102 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-31 17:24:45,102 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-31 17:24:45,103 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 17:24:45,103 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-31 17:24:45,103 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-31 17:24:45,103 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-31 17:24:45,103 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-31 17:24:45,103 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-31 17:24:45,104 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-31 17:24:45,104 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 -> 70d0a39df19098c1cc382c782d0d39487b2971fb [2018-12-31 17:24:45,147 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-31 17:24:45,162 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-31 17:24:45,166 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-31 17:24:45,167 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-31 17:24:45,167 INFO L276 PluginConnector]: CDTParser initialized [2018-12-31 17:24:45,168 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/pthread/triangular-longest_false-unreach-call.i [2018-12-31 17:24:45,218 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/871980e76/9c6add5ba8a24d138f6e308d32899b09/FLAG3430e2817 [2018-12-31 17:24:45,754 INFO L307 CDTParser]: Found 1 translation units. [2018-12-31 17:24:45,754 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/pthread/triangular-longest_false-unreach-call.i [2018-12-31 17:24:45,769 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/871980e76/9c6add5ba8a24d138f6e308d32899b09/FLAG3430e2817 [2018-12-31 17:24:46,048 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/871980e76/9c6add5ba8a24d138f6e308d32899b09 [2018-12-31 17:24:46,052 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-31 17:24:46,054 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-31 17:24:46,055 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-31 17:24:46,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-31 17:24:46,059 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-31 17:24:46,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 05:24:46" (1/1) ... [2018-12-31 17:24:46,063 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65f79300 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:24:46, skipping insertion in model container [2018-12-31 17:24:46,064 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 05:24:46" (1/1) ... [2018-12-31 17:24:46,073 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-31 17:24:46,133 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-31 17:24:46,548 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 17:24:46,572 INFO L191 MainTranslator]: Completed pre-run [2018-12-31 17:24:46,629 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 17:24:46,784 INFO L195 MainTranslator]: Completed translation [2018-12-31 17:24:46,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:24:46 WrapperNode [2018-12-31 17:24:46,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-31 17:24:46,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-31 17:24:46,786 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-31 17:24:46,787 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-31 17:24:46,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:24:46" (1/1) ... [2018-12-31 17:24:46,813 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:24:46" (1/1) ... [2018-12-31 17:24:46,840 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-31 17:24:46,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-31 17:24:46,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-31 17:24:46,841 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-31 17:24:46,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:24:46" (1/1) ... [2018-12-31 17:24:46,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:24:46" (1/1) ... [2018-12-31 17:24:46,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:24:46" (1/1) ... [2018-12-31 17:24:46,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:24:46" (1/1) ... [2018-12-31 17:24:46,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:24:46" (1/1) ... [2018-12-31 17:24:46,870 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:24:46" (1/1) ... [2018-12-31 17:24:46,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:24:46" (1/1) ... [2018-12-31 17:24:46,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-31 17:24:46,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-31 17:24:46,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-31 17:24:46,876 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-31 17:24:46,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:24:46" (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 17:24:46,928 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2018-12-31 17:24:46,928 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2018-12-31 17:24:46,928 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2018-12-31 17:24:46,929 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2018-12-31 17:24:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-31 17:24:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2018-12-31 17:24:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2018-12-31 17:24:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-31 17:24:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2018-12-31 17:24:46,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-31 17:24:46,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-31 17:24:46,932 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 17:24:47,380 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-31 17:24:47,381 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-12-31 17:24:47,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 05:24:47 BoogieIcfgContainer [2018-12-31 17:24:47,382 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-31 17:24:47,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-31 17:24:47,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-31 17:24:47,387 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-31 17:24:47,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.12 05:24:46" (1/3) ... [2018-12-31 17:24:47,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c30506c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 05:24:47, skipping insertion in model container [2018-12-31 17:24:47,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:24:46" (2/3) ... [2018-12-31 17:24:47,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c30506c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 05:24:47, skipping insertion in model container [2018-12-31 17:24:47,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 05:24:47" (3/3) ... [2018-12-31 17:24:47,391 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest_false-unreach-call.i [2018-12-31 17:24:47,424 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,424 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,424 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,424 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,425 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,425 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,425 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,427 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,427 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,427 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,427 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,427 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,428 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,428 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,428 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,428 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,429 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,430 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,430 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,431 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,431 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,431 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,431 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,431 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,433 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,433 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,433 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,434 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-31 17:24:47,455 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-12-31 17:24:47,456 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-31 17:24:47,464 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-31 17:24:47,481 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-31 17:24:47,508 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-31 17:24:47,509 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-31 17:24:47,509 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-31 17:24:47,509 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-31 17:24:47,509 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-31 17:24:47,509 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-31 17:24:47,509 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-31 17:24:47,509 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-31 17:24:47,510 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-31 17:24:47,520 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46places, 48 transitions [2018-12-31 17:24:47,586 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2018-12-31 17:24:47,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2018-12-31 17:24:47,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-31 17:24:47,599 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:24:47,600 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 17:24:47,603 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:24:47,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:24:47,609 INFO L82 PathProgramCache]: Analyzing trace with hash 573491188, now seen corresponding path program 1 times [2018-12-31 17:24:47,612 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:24:47,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:24:47,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:47,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:24:47,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:24:48,098 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 17:24:48,101 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 17:24:48,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-31 17:24:48,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-31 17:24:48,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-31 17:24:48,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-31 17:24:48,124 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2018-12-31 17:24:48,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:24:48,429 INFO L93 Difference]: Finished difference Result 1411 states and 4051 transitions. [2018-12-31 17:24:48,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-31 17:24:48,431 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-12-31 17:24:48,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:24:48,457 INFO L225 Difference]: With dead ends: 1411 [2018-12-31 17:24:48,457 INFO L226 Difference]: Without dead ends: 322 [2018-12-31 17:24:48,459 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 17:24:48,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2018-12-31 17:24:48,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2018-12-31 17:24:48,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-12-31 17:24:48,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 820 transitions. [2018-12-31 17:24:48,538 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 820 transitions. Word has length 19 [2018-12-31 17:24:48,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:24:48,539 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 820 transitions. [2018-12-31 17:24:48,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-31 17:24:48,539 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 820 transitions. [2018-12-31 17:24:48,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-31 17:24:48,541 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:24:48,542 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 17:24:48,542 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:24:48,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:24:48,542 INFO L82 PathProgramCache]: Analyzing trace with hash -143811728, now seen corresponding path program 1 times [2018-12-31 17:24:48,543 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:24:48,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:24:48,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:48,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:24:48,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:48,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:24:48,680 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 17:24:48,680 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 17:24:48,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-31 17:24:48,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-31 17:24:48,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-31 17:24:48,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-31 17:24:48,683 INFO L87 Difference]: Start difference. First operand 322 states and 820 transitions. Second operand 5 states. [2018-12-31 17:24:48,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:24:48,821 INFO L93 Difference]: Finished difference Result 411 states and 998 transitions. [2018-12-31 17:24:48,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-31 17:24:48,825 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-12-31 17:24:48,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:24:48,831 INFO L225 Difference]: With dead ends: 411 [2018-12-31 17:24:48,834 INFO L226 Difference]: Without dead ends: 290 [2018-12-31 17:24:48,835 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-31 17:24:48,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-12-31 17:24:48,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2018-12-31 17:24:48,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-12-31 17:24:48,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2018-12-31 17:24:48,871 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2018-12-31 17:24:48,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:24:48,872 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2018-12-31 17:24:48,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-31 17:24:48,872 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2018-12-31 17:24:48,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-31 17:24:48,875 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:24:48,875 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 17:24:48,876 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:24:48,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:24:48,877 INFO L82 PathProgramCache]: Analyzing trace with hash 28324926, now seen corresponding path program 1 times [2018-12-31 17:24:48,877 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:24:48,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:24:48,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:48,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:24:48,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:24:49,008 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 17:24:49,009 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 17:24:49,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-31 17:24:49,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-31 17:24:49,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-31 17:24:49,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-31 17:24:49,010 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2018-12-31 17:24:49,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:24:49,228 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2018-12-31 17:24:49,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-31 17:24:49,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-31 17:24:49,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:24:49,232 INFO L225 Difference]: With dead ends: 437 [2018-12-31 17:24:49,232 INFO L226 Difference]: Without dead ends: 309 [2018-12-31 17:24:49,232 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 17:24:49,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-12-31 17:24:49,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 299. [2018-12-31 17:24:49,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-12-31 17:24:49,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 732 transitions. [2018-12-31 17:24:49,249 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 732 transitions. Word has length 25 [2018-12-31 17:24:49,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:24:49,250 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 732 transitions. [2018-12-31 17:24:49,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-31 17:24:49,250 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 732 transitions. [2018-12-31 17:24:49,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-31 17:24:49,252 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:24:49,253 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 17:24:49,253 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:24:49,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:24:49,253 INFO L82 PathProgramCache]: Analyzing trace with hash 19387626, now seen corresponding path program 2 times [2018-12-31 17:24:49,253 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:24:49,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:24:49,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:49,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:24:49,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:24:49,731 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 17:24:49,731 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 17:24:49,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-31 17:24:49,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-31 17:24:49,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-31 17:24:49,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-31 17:24:49,733 INFO L87 Difference]: Start difference. First operand 299 states and 732 transitions. Second operand 6 states. [2018-12-31 17:24:49,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:24:49,891 INFO L93 Difference]: Finished difference Result 456 states and 1095 transitions. [2018-12-31 17:24:49,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-31 17:24:49,894 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-31 17:24:49,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:24:49,897 INFO L225 Difference]: With dead ends: 456 [2018-12-31 17:24:49,898 INFO L226 Difference]: Without dead ends: 319 [2018-12-31 17:24:49,899 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-31 17:24:49,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-12-31 17:24:49,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-12-31 17:24:49,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-12-31 17:24:49,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2018-12-31 17:24:49,915 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2018-12-31 17:24:49,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:24:49,917 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2018-12-31 17:24:49,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-31 17:24:49,917 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2018-12-31 17:24:49,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-31 17:24:49,922 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:24:49,922 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 17:24:49,923 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:24:49,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:24:49,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1592611961, now seen corresponding path program 1 times [2018-12-31 17:24:49,923 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:24:49,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:24:49,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:49,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:24:49,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:24:50,347 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 17:24:50,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:24:50,348 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 17:24:50,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:24:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:24:50,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:24:50,526 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 17:24:50,552 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:24:50,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-12-31 17:24:50,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-31 17:24:50,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-31 17:24:50,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-12-31 17:24:50,554 INFO L87 Difference]: Start difference. First operand 319 states and 772 transitions. Second operand 8 states. [2018-12-31 17:24:50,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:24:50,852 INFO L93 Difference]: Finished difference Result 466 states and 1115 transitions. [2018-12-31 17:24:50,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-31 17:24:50,853 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-12-31 17:24:50,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:24:50,857 INFO L225 Difference]: With dead ends: 466 [2018-12-31 17:24:50,857 INFO L226 Difference]: Without dead ends: 335 [2018-12-31 17:24:50,858 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-12-31 17:24:50,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-12-31 17:24:50,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 300. [2018-12-31 17:24:50,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2018-12-31 17:24:50,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 734 transitions. [2018-12-31 17:24:50,869 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 734 transitions. Word has length 29 [2018-12-31 17:24:50,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:24:50,869 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 734 transitions. [2018-12-31 17:24:50,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-31 17:24:50,870 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 734 transitions. [2018-12-31 17:24:50,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-31 17:24:50,871 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:24:50,871 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 17:24:50,872 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:24:50,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:24:50,872 INFO L82 PathProgramCache]: Analyzing trace with hash 2035666861, now seen corresponding path program 1 times [2018-12-31 17:24:50,872 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:24:50,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:24:50,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:50,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:24:50,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:24:50,994 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 17:24:50,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:24:50,995 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 17:24:51,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:24:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:24:51,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:24:51,204 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 17:24:51,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:24:51,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-12-31 17:24:51,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-31 17:24:51,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-31 17:24:51,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-12-31 17:24:51,226 INFO L87 Difference]: Start difference. First operand 300 states and 734 transitions. Second operand 8 states. [2018-12-31 17:24:51,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:24:51,400 INFO L93 Difference]: Finished difference Result 482 states and 1147 transitions. [2018-12-31 17:24:51,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-31 17:24:51,401 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-12-31 17:24:51,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:24:51,406 INFO L225 Difference]: With dead ends: 482 [2018-12-31 17:24:51,406 INFO L226 Difference]: Without dead ends: 351 [2018-12-31 17:24:51,407 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-12-31 17:24:51,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-12-31 17:24:51,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-12-31 17:24:51,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-12-31 17:24:51,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 836 transitions. [2018-12-31 17:24:51,421 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 836 transitions. Word has length 29 [2018-12-31 17:24:51,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:24:51,423 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 836 transitions. [2018-12-31 17:24:51,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-31 17:24:51,423 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 836 transitions. [2018-12-31 17:24:51,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-31 17:24:51,426 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:24:51,426 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 17:24:51,426 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:24:51,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:24:51,427 INFO L82 PathProgramCache]: Analyzing trace with hash -460714038, now seen corresponding path program 1 times [2018-12-31 17:24:51,427 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:24:51,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:24:51,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:51,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:24:51,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:24:51,549 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 17:24:51,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:24:51,549 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 17:24:51,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:24:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:24:51,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:24:51,691 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 17:24:51,709 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:24:51,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-12-31 17:24:51,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-31 17:24:51,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-31 17:24:51,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-12-31 17:24:51,712 INFO L87 Difference]: Start difference. First operand 351 states and 836 transitions. Second operand 9 states. [2018-12-31 17:24:52,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:24:52,040 INFO L93 Difference]: Finished difference Result 498 states and 1179 transitions. [2018-12-31 17:24:52,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-31 17:24:52,041 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-12-31 17:24:52,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:24:52,043 INFO L225 Difference]: With dead ends: 498 [2018-12-31 17:24:52,043 INFO L226 Difference]: Without dead ends: 367 [2018-12-31 17:24:52,044 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-12-31 17:24:52,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-12-31 17:24:52,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 316. [2018-12-31 17:24:52,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-12-31 17:24:52,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 766 transitions. [2018-12-31 17:24:52,052 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 766 transitions. Word has length 33 [2018-12-31 17:24:52,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:24:52,053 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 766 transitions. [2018-12-31 17:24:52,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-31 17:24:52,053 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 766 transitions. [2018-12-31 17:24:52,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-31 17:24:52,054 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:24:52,054 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 17:24:52,054 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:24:52,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:24:52,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1110322378, now seen corresponding path program 2 times [2018-12-31 17:24:52,054 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:24:52,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:24:52,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:52,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:24:52,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:24:52,164 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 17:24:52,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:24:52,164 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:24:52,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 17:24:52,213 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 17:24:52,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:24:52,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:24:52,344 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 17:24:52,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:24:52,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-12-31 17:24:52,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-31 17:24:52,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-31 17:24:52,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-12-31 17:24:52,364 INFO L87 Difference]: Start difference. First operand 316 states and 766 transitions. Second operand 9 states. [2018-12-31 17:24:52,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:24:52,520 INFO L93 Difference]: Finished difference Result 514 states and 1211 transitions. [2018-12-31 17:24:52,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-31 17:24:52,523 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-12-31 17:24:52,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:24:52,525 INFO L225 Difference]: With dead ends: 514 [2018-12-31 17:24:52,525 INFO L226 Difference]: Without dead ends: 383 [2018-12-31 17:24:52,526 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-12-31 17:24:52,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-12-31 17:24:52,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2018-12-31 17:24:52,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-12-31 17:24:52,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 900 transitions. [2018-12-31 17:24:52,537 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 900 transitions. Word has length 33 [2018-12-31 17:24:52,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:24:52,537 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 900 transitions. [2018-12-31 17:24:52,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-31 17:24:52,537 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 900 transitions. [2018-12-31 17:24:52,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-31 17:24:52,538 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:24:52,538 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 17:24:52,539 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:24:52,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:24:52,539 INFO L82 PathProgramCache]: Analyzing trace with hash 2061178471, now seen corresponding path program 3 times [2018-12-31 17:24:52,539 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:24:52,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:24:52,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:52,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:24:52,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:24:52,744 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 17:24:52,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:24:52,744 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 17:24:52,757 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 17:24:52,784 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-31 17:24:52,785 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:24:52,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:24:52,824 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 17:24:52,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:24:52,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-12-31 17:24:52,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-31 17:24:52,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-31 17:24:52,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-12-31 17:24:52,847 INFO L87 Difference]: Start difference. First operand 383 states and 900 transitions. Second operand 10 states. [2018-12-31 17:24:53,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:24:53,040 INFO L93 Difference]: Finished difference Result 530 states and 1243 transitions. [2018-12-31 17:24:53,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-31 17:24:53,048 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-12-31 17:24:53,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:24:53,050 INFO L225 Difference]: With dead ends: 530 [2018-12-31 17:24:53,051 INFO L226 Difference]: Without dead ends: 399 [2018-12-31 17:24:53,052 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 17:24:53,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-12-31 17:24:53,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 332. [2018-12-31 17:24:53,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2018-12-31 17:24:53,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 798 transitions. [2018-12-31 17:24:53,062 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 798 transitions. Word has length 37 [2018-12-31 17:24:53,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:24:53,062 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 798 transitions. [2018-12-31 17:24:53,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-31 17:24:53,062 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 798 transitions. [2018-12-31 17:24:53,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-31 17:24:53,065 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:24:53,065 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 17:24:53,065 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:24:53,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:24:53,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1649592435, now seen corresponding path program 4 times [2018-12-31 17:24:53,065 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:24:53,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:24:53,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:53,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:24:53,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:24:53,206 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 17:24:53,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:24:53,207 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 17:24:53,220 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 17:24:53,239 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 17:24:53,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:24:53,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:24:53,298 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 17:24:53,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:24:53,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-12-31 17:24:53,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-31 17:24:53,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-31 17:24:53,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-12-31 17:24:53,318 INFO L87 Difference]: Start difference. First operand 332 states and 798 transitions. Second operand 10 states. [2018-12-31 17:24:53,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:24:53,449 INFO L93 Difference]: Finished difference Result 546 states and 1275 transitions. [2018-12-31 17:24:53,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-31 17:24:53,450 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-12-31 17:24:53,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:24:53,454 INFO L225 Difference]: With dead ends: 546 [2018-12-31 17:24:53,454 INFO L226 Difference]: Without dead ends: 415 [2018-12-31 17:24:53,454 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2018-12-31 17:24:53,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2018-12-31 17:24:53,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2018-12-31 17:24:53,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2018-12-31 17:24:53,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 964 transitions. [2018-12-31 17:24:53,464 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 964 transitions. Word has length 37 [2018-12-31 17:24:53,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:24:53,464 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 964 transitions. [2018-12-31 17:24:53,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-31 17:24:53,464 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 964 transitions. [2018-12-31 17:24:53,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-31 17:24:53,465 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:24:53,465 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 17:24:53,466 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:24:53,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:24:53,466 INFO L82 PathProgramCache]: Analyzing trace with hash 2086800042, now seen corresponding path program 5 times [2018-12-31 17:24:53,466 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:24:53,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:24:53,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:53,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:24:53,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:24:53,620 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 17:24:53,620 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:24:53,620 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 17:24:53,635 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 17:24:53,659 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-12-31 17:24:53,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:24:53,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:24:53,817 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 17:24:53,836 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:24:53,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-12-31 17:24:53,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-31 17:24:53,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-31 17:24:53,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-12-31 17:24:53,837 INFO L87 Difference]: Start difference. First operand 415 states and 964 transitions. Second operand 11 states. [2018-12-31 17:24:54,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:24:54,114 INFO L93 Difference]: Finished difference Result 562 states and 1307 transitions. [2018-12-31 17:24:54,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-31 17:24:54,116 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-12-31 17:24:54,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:24:54,118 INFO L225 Difference]: With dead ends: 562 [2018-12-31 17:24:54,118 INFO L226 Difference]: Without dead ends: 431 [2018-12-31 17:24:54,119 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2018-12-31 17:24:54,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-12-31 17:24:54,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 348. [2018-12-31 17:24:54,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2018-12-31 17:24:54,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 830 transitions. [2018-12-31 17:24:54,128 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 830 transitions. Word has length 41 [2018-12-31 17:24:54,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:24:54,128 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 830 transitions. [2018-12-31 17:24:54,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-31 17:24:54,128 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 830 transitions. [2018-12-31 17:24:54,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-31 17:24:54,129 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:24:54,129 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 17:24:54,130 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:24:54,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:24:54,130 INFO L82 PathProgramCache]: Analyzing trace with hash 449750186, now seen corresponding path program 6 times [2018-12-31 17:24:54,130 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:24:54,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:24:54,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:54,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:24:54,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:24:54,294 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 17:24:54,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:24:54,295 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 17:24:54,305 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 17:24:54,364 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-12-31 17:24:54,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:24:54,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:24:54,543 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 17:24:54,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:24:54,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-12-31 17:24:54,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-31 17:24:54,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-31 17:24:54,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-12-31 17:24:54,563 INFO L87 Difference]: Start difference. First operand 348 states and 830 transitions. Second operand 11 states. [2018-12-31 17:24:54,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:24:54,774 INFO L93 Difference]: Finished difference Result 578 states and 1339 transitions. [2018-12-31 17:24:54,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-31 17:24:54,775 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-12-31 17:24:54,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:24:54,778 INFO L225 Difference]: With dead ends: 578 [2018-12-31 17:24:54,778 INFO L226 Difference]: Without dead ends: 447 [2018-12-31 17:24:54,779 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2018-12-31 17:24:54,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-12-31 17:24:54,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2018-12-31 17:24:54,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-12-31 17:24:54,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1028 transitions. [2018-12-31 17:24:54,788 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1028 transitions. Word has length 41 [2018-12-31 17:24:54,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:24:54,788 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1028 transitions. [2018-12-31 17:24:54,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-31 17:24:54,789 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1028 transitions. [2018-12-31 17:24:54,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-31 17:24:54,790 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:24:54,790 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 17:24:54,790 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:24:54,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:24:54,790 INFO L82 PathProgramCache]: Analyzing trace with hash 511353159, now seen corresponding path program 7 times [2018-12-31 17:24:54,790 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:24:54,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:24:54,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:54,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:24:54,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:54,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:24:55,113 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 17:24:55,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:24:55,113 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 17:24:55,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:24:55,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:24:55,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:24:55,204 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 17:24:55,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:24:55,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-12-31 17:24:55,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-31 17:24:55,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-31 17:24:55,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-12-31 17:24:55,225 INFO L87 Difference]: Start difference. First operand 447 states and 1028 transitions. Second operand 12 states. [2018-12-31 17:24:55,621 WARN L181 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-12-31 17:24:55,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:24:55,774 INFO L93 Difference]: Finished difference Result 594 states and 1371 transitions. [2018-12-31 17:24:55,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-31 17:24:55,775 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-12-31 17:24:55,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:24:55,779 INFO L225 Difference]: With dead ends: 594 [2018-12-31 17:24:55,780 INFO L226 Difference]: Without dead ends: 463 [2018-12-31 17:24:55,780 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2018-12-31 17:24:55,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2018-12-31 17:24:55,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 364. [2018-12-31 17:24:55,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-12-31 17:24:55,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 862 transitions. [2018-12-31 17:24:55,789 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 862 transitions. Word has length 45 [2018-12-31 17:24:55,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:24:55,789 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 862 transitions. [2018-12-31 17:24:55,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-31 17:24:55,789 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 862 transitions. [2018-12-31 17:24:55,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-31 17:24:55,790 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:24:55,790 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 17:24:55,790 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:24:55,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:24:55,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1081163923, now seen corresponding path program 8 times [2018-12-31 17:24:55,791 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:24:55,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:24:55,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:55,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:24:55,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:24:55,952 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 17:24:55,952 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:24:55,952 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:24:55,976 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 17:24:55,998 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 17:24:55,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:24:56,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:24:56,028 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 17:24:56,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:24:56,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-12-31 17:24:56,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-31 17:24:56,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-31 17:24:56,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-12-31 17:24:56,050 INFO L87 Difference]: Start difference. First operand 364 states and 862 transitions. Second operand 12 states. [2018-12-31 17:24:56,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:24:56,260 INFO L93 Difference]: Finished difference Result 610 states and 1403 transitions. [2018-12-31 17:24:56,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-31 17:24:56,261 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-12-31 17:24:56,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:24:56,263 INFO L225 Difference]: With dead ends: 610 [2018-12-31 17:24:56,263 INFO L226 Difference]: Without dead ends: 479 [2018-12-31 17:24:56,264 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2018-12-31 17:24:56,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-12-31 17:24:56,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2018-12-31 17:24:56,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-12-31 17:24:56,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1092 transitions. [2018-12-31 17:24:56,277 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1092 transitions. Word has length 45 [2018-12-31 17:24:56,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:24:56,277 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 1092 transitions. [2018-12-31 17:24:56,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-31 17:24:56,277 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1092 transitions. [2018-12-31 17:24:56,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-31 17:24:56,278 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:24:56,278 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 17:24:56,280 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:24:56,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:24:56,281 INFO L82 PathProgramCache]: Analyzing trace with hash -578738806, now seen corresponding path program 9 times [2018-12-31 17:24:56,281 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:24:56,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:24:56,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:56,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:24:56,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:24:56,519 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 17:24:56,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:24:56,519 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:24:56,530 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 17:24:56,554 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-31 17:24:56,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:24:56,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:24:56,599 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 17:24:56,618 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:24:56,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-12-31 17:24:56,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-31 17:24:56,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-31 17:24:56,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-12-31 17:24:56,619 INFO L87 Difference]: Start difference. First operand 479 states and 1092 transitions. Second operand 13 states. [2018-12-31 17:24:57,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:24:57,014 INFO L93 Difference]: Finished difference Result 626 states and 1435 transitions. [2018-12-31 17:24:57,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-31 17:24:57,022 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-12-31 17:24:57,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:24:57,027 INFO L225 Difference]: With dead ends: 626 [2018-12-31 17:24:57,027 INFO L226 Difference]: Without dead ends: 495 [2018-12-31 17:24:57,028 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2018-12-31 17:24:57,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-12-31 17:24:57,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 380. [2018-12-31 17:24:57,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2018-12-31 17:24:57,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 894 transitions. [2018-12-31 17:24:57,042 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 894 transitions. Word has length 49 [2018-12-31 17:24:57,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:24:57,042 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 894 transitions. [2018-12-31 17:24:57,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-31 17:24:57,044 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 894 transitions. [2018-12-31 17:24:57,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-31 17:24:57,047 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:24:57,048 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 17:24:57,048 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:24:57,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:24:57,048 INFO L82 PathProgramCache]: Analyzing trace with hash -555139958, now seen corresponding path program 10 times [2018-12-31 17:24:57,048 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:24:57,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:24:57,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:57,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:24:57,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:24:57,219 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 17:24:57,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:24:57,220 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 17:24:57,231 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 17:24:57,250 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 17:24:57,250 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:24:57,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:24:57,452 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 17:24:57,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:24:57,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-12-31 17:24:57,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-31 17:24:57,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-31 17:24:57,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-12-31 17:24:57,472 INFO L87 Difference]: Start difference. First operand 380 states and 894 transitions. Second operand 13 states. [2018-12-31 17:24:57,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:24:57,682 INFO L93 Difference]: Finished difference Result 642 states and 1467 transitions. [2018-12-31 17:24:57,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-31 17:24:57,683 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-12-31 17:24:57,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:24:57,686 INFO L225 Difference]: With dead ends: 642 [2018-12-31 17:24:57,687 INFO L226 Difference]: Without dead ends: 511 [2018-12-31 17:24:57,687 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2018-12-31 17:24:57,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2018-12-31 17:24:57,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2018-12-31 17:24:57,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2018-12-31 17:24:57,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1156 transitions. [2018-12-31 17:24:57,698 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1156 transitions. Word has length 49 [2018-12-31 17:24:57,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:24:57,698 INFO L480 AbstractCegarLoop]: Abstraction has 511 states and 1156 transitions. [2018-12-31 17:24:57,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-31 17:24:57,698 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1156 transitions. [2018-12-31 17:24:57,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-31 17:24:57,700 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:24:57,700 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 17:24:57,701 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:24:57,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:24:57,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1389448231, now seen corresponding path program 11 times [2018-12-31 17:24:57,701 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:24:57,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:24:57,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:57,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:24:57,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:24:58,588 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 17:24:58,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:24:58,588 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 17:24:58,602 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 17:24:58,652 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-12-31 17:24:58,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:24:58,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:24:58,839 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 17:24:58,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:24:58,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-12-31 17:24:58,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-31 17:24:58,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-31 17:24:58,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-12-31 17:24:58,862 INFO L87 Difference]: Start difference. First operand 511 states and 1156 transitions. Second operand 14 states. [2018-12-31 17:24:59,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:24:59,098 INFO L93 Difference]: Finished difference Result 658 states and 1499 transitions. [2018-12-31 17:24:59,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-31 17:24:59,099 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-12-31 17:24:59,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:24:59,102 INFO L225 Difference]: With dead ends: 658 [2018-12-31 17:24:59,103 INFO L226 Difference]: Without dead ends: 527 [2018-12-31 17:24:59,103 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2018-12-31 17:24:59,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2018-12-31 17:24:59,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 396. [2018-12-31 17:24:59,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2018-12-31 17:24:59,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 926 transitions. [2018-12-31 17:24:59,114 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 926 transitions. Word has length 53 [2018-12-31 17:24:59,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:24:59,114 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 926 transitions. [2018-12-31 17:24:59,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-31 17:24:59,114 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 926 transitions. [2018-12-31 17:24:59,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-31 17:24:59,118 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:24:59,118 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 17:24:59,118 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:24:59,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:24:59,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1121609549, now seen corresponding path program 12 times [2018-12-31 17:24:59,119 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:24:59,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:24:59,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:59,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:24:59,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:24:59,292 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 17:24:59,292 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:24:59,292 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 17:24:59,303 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 17:24:59,324 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-12-31 17:24:59,325 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:24:59,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:24:59,360 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 17:24:59,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:24:59,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-12-31 17:24:59,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-31 17:24:59,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-31 17:24:59,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-12-31 17:24:59,383 INFO L87 Difference]: Start difference. First operand 396 states and 926 transitions. Second operand 14 states. [2018-12-31 17:24:59,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:24:59,614 INFO L93 Difference]: Finished difference Result 674 states and 1531 transitions. [2018-12-31 17:24:59,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-31 17:24:59,615 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-12-31 17:24:59,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:24:59,618 INFO L225 Difference]: With dead ends: 674 [2018-12-31 17:24:59,618 INFO L226 Difference]: Without dead ends: 543 [2018-12-31 17:24:59,619 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2018-12-31 17:24:59,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-12-31 17:24:59,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2018-12-31 17:24:59,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2018-12-31 17:24:59,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1220 transitions. [2018-12-31 17:24:59,627 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1220 transitions. Word has length 53 [2018-12-31 17:24:59,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:24:59,628 INFO L480 AbstractCegarLoop]: Abstraction has 543 states and 1220 transitions. [2018-12-31 17:24:59,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-31 17:24:59,629 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1220 transitions. [2018-12-31 17:24:59,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-31 17:24:59,630 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:24:59,630 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 17:24:59,630 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:24:59,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:24:59,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1590124650, now seen corresponding path program 13 times [2018-12-31 17:24:59,631 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:24:59,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:24:59,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:59,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:24:59,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:24:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:00,466 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 17:25:00,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:00,466 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 17:25:00,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:25:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:00,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:00,593 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 17:25:00,613 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:00,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-12-31 17:25:00,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-31 17:25:00,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-31 17:25:00,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-12-31 17:25:00,614 INFO L87 Difference]: Start difference. First operand 543 states and 1220 transitions. Second operand 15 states. [2018-12-31 17:25:01,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:01,113 INFO L93 Difference]: Finished difference Result 690 states and 1563 transitions. [2018-12-31 17:25:01,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-31 17:25:01,114 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-12-31 17:25:01,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:01,116 INFO L225 Difference]: With dead ends: 690 [2018-12-31 17:25:01,118 INFO L226 Difference]: Without dead ends: 559 [2018-12-31 17:25:01,118 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2018-12-31 17:25:01,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2018-12-31 17:25:01,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 412. [2018-12-31 17:25:01,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-12-31 17:25:01,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 958 transitions. [2018-12-31 17:25:01,127 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 958 transitions. Word has length 57 [2018-12-31 17:25:01,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:01,128 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 958 transitions. [2018-12-31 17:25:01,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-31 17:25:01,128 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 958 transitions. [2018-12-31 17:25:01,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-31 17:25:01,129 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:01,131 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 17:25:01,131 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:01,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:01,132 INFO L82 PathProgramCache]: Analyzing trace with hash 39711850, now seen corresponding path program 14 times [2018-12-31 17:25:01,132 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:01,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:01,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:01,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:25:01,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:01,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:01,394 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 17:25:01,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:01,394 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 17:25:01,411 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 17:25:01,433 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 17:25:01,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:01,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:01,503 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 17:25:01,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:01,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-12-31 17:25:01,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-31 17:25:01,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-31 17:25:01,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-12-31 17:25:01,523 INFO L87 Difference]: Start difference. First operand 412 states and 958 transitions. Second operand 15 states. [2018-12-31 17:25:01,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:01,808 INFO L93 Difference]: Finished difference Result 706 states and 1595 transitions. [2018-12-31 17:25:01,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-31 17:25:01,810 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-12-31 17:25:01,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:01,813 INFO L225 Difference]: With dead ends: 706 [2018-12-31 17:25:01,813 INFO L226 Difference]: Without dead ends: 575 [2018-12-31 17:25:01,814 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 17:25:01,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2018-12-31 17:25:01,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2018-12-31 17:25:01,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2018-12-31 17:25:01,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1284 transitions. [2018-12-31 17:25:01,825 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1284 transitions. Word has length 57 [2018-12-31 17:25:01,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:01,825 INFO L480 AbstractCegarLoop]: Abstraction has 575 states and 1284 transitions. [2018-12-31 17:25:01,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-31 17:25:01,826 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1284 transitions. [2018-12-31 17:25:01,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-31 17:25:01,827 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:01,827 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 17:25:01,827 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:01,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:01,828 INFO L82 PathProgramCache]: Analyzing trace with hash -21031161, now seen corresponding path program 15 times [2018-12-31 17:25:01,828 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:01,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:01,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:01,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:01,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:01,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:02,047 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 17:25:02,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:02,047 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 17:25:02,059 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 17:25:02,091 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-31 17:25:02,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:02,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:02,124 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 17:25:02,152 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:02,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-12-31 17:25:02,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-31 17:25:02,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-31 17:25:02,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-12-31 17:25:02,153 INFO L87 Difference]: Start difference. First operand 575 states and 1284 transitions. Second operand 16 states. [2018-12-31 17:25:02,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:02,443 INFO L93 Difference]: Finished difference Result 722 states and 1627 transitions. [2018-12-31 17:25:02,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-31 17:25:02,444 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2018-12-31 17:25:02,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:02,447 INFO L225 Difference]: With dead ends: 722 [2018-12-31 17:25:02,447 INFO L226 Difference]: Without dead ends: 591 [2018-12-31 17:25:02,448 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2018-12-31 17:25:02,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2018-12-31 17:25:02,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 428. [2018-12-31 17:25:02,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2018-12-31 17:25:02,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 990 transitions. [2018-12-31 17:25:02,457 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 990 transitions. Word has length 61 [2018-12-31 17:25:02,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:02,457 INFO L480 AbstractCegarLoop]: Abstraction has 428 states and 990 transitions. [2018-12-31 17:25:02,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-31 17:25:02,457 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 990 transitions. [2018-12-31 17:25:02,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-31 17:25:02,458 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:02,458 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 17:25:02,461 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:02,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:02,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1418711251, now seen corresponding path program 16 times [2018-12-31 17:25:02,462 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:02,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:02,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:02,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:02,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:02,693 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 17:25:02,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:02,694 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 17:25:02,707 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 17:25:02,754 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 17:25:02,754 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:02,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:02,848 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 17:25:02,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:02,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-12-31 17:25:02,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-31 17:25:02,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-31 17:25:02,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-12-31 17:25:02,871 INFO L87 Difference]: Start difference. First operand 428 states and 990 transitions. Second operand 16 states. [2018-12-31 17:25:03,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:03,189 INFO L93 Difference]: Finished difference Result 738 states and 1659 transitions. [2018-12-31 17:25:03,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-31 17:25:03,190 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2018-12-31 17:25:03,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:03,195 INFO L225 Difference]: With dead ends: 738 [2018-12-31 17:25:03,195 INFO L226 Difference]: Without dead ends: 607 [2018-12-31 17:25:03,196 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2018-12-31 17:25:03,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2018-12-31 17:25:03,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2018-12-31 17:25:03,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2018-12-31 17:25:03,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1348 transitions. [2018-12-31 17:25:03,205 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1348 transitions. Word has length 61 [2018-12-31 17:25:03,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:03,207 INFO L480 AbstractCegarLoop]: Abstraction has 607 states and 1348 transitions. [2018-12-31 17:25:03,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-31 17:25:03,207 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1348 transitions. [2018-12-31 17:25:03,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-12-31 17:25:03,210 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:03,210 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 17:25:03,210 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:03,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:03,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1997847370, now seen corresponding path program 17 times [2018-12-31 17:25:03,212 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:03,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:03,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:03,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:03,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:03,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:03,423 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 17:25:03,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:03,424 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 17:25:03,434 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 17:25:03,460 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-12-31 17:25:03,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:03,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:03,505 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 17:25:03,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:03,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-12-31 17:25:03,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-31 17:25:03,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-31 17:25:03,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-12-31 17:25:03,526 INFO L87 Difference]: Start difference. First operand 607 states and 1348 transitions. Second operand 17 states. [2018-12-31 17:25:03,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:03,825 INFO L93 Difference]: Finished difference Result 754 states and 1691 transitions. [2018-12-31 17:25:03,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-31 17:25:03,826 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2018-12-31 17:25:03,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:03,829 INFO L225 Difference]: With dead ends: 754 [2018-12-31 17:25:03,829 INFO L226 Difference]: Without dead ends: 623 [2018-12-31 17:25:03,830 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=271, Invalid=599, Unknown=0, NotChecked=0, Total=870 [2018-12-31 17:25:03,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2018-12-31 17:25:03,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 444. [2018-12-31 17:25:03,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2018-12-31 17:25:03,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1022 transitions. [2018-12-31 17:25:03,838 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1022 transitions. Word has length 65 [2018-12-31 17:25:03,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:03,840 INFO L480 AbstractCegarLoop]: Abstraction has 444 states and 1022 transitions. [2018-12-31 17:25:03,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-31 17:25:03,840 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1022 transitions. [2018-12-31 17:25:03,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-12-31 17:25:03,841 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:03,841 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 17:25:03,841 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:03,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:03,844 INFO L82 PathProgramCache]: Analyzing trace with hash 420269130, now seen corresponding path program 18 times [2018-12-31 17:25:03,844 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:03,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:03,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:03,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:03,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:04,020 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 17:25:04,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:04,020 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 17:25:04,033 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 17:25:04,057 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-12-31 17:25:04,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:04,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:04,102 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 17:25:04,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:04,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-12-31 17:25:04,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-31 17:25:04,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-31 17:25:04,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-12-31 17:25:04,122 INFO L87 Difference]: Start difference. First operand 444 states and 1022 transitions. Second operand 17 states. [2018-12-31 17:25:04,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:04,464 INFO L93 Difference]: Finished difference Result 770 states and 1723 transitions. [2018-12-31 17:25:04,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-31 17:25:04,465 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2018-12-31 17:25:04,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:04,467 INFO L225 Difference]: With dead ends: 770 [2018-12-31 17:25:04,468 INFO L226 Difference]: Without dead ends: 639 [2018-12-31 17:25:04,468 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=608, Unknown=0, NotChecked=0, Total=870 [2018-12-31 17:25:04,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2018-12-31 17:25:04,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 639. [2018-12-31 17:25:04,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 639 states. [2018-12-31 17:25:04,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1412 transitions. [2018-12-31 17:25:04,476 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1412 transitions. Word has length 65 [2018-12-31 17:25:04,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:04,477 INFO L480 AbstractCegarLoop]: Abstraction has 639 states and 1412 transitions. [2018-12-31 17:25:04,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-31 17:25:04,477 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1412 transitions. [2018-12-31 17:25:04,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-31 17:25:04,480 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:04,481 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 17:25:04,481 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:04,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:04,481 INFO L82 PathProgramCache]: Analyzing trace with hash 690225639, now seen corresponding path program 19 times [2018-12-31 17:25:04,481 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:04,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:04,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:04,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:04,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:04,760 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 17:25:04,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:04,760 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 17:25:04,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:25:04,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:04,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:04,829 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 17:25:04,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:04,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-12-31 17:25:04,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-31 17:25:04,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-31 17:25:04,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2018-12-31 17:25:04,849 INFO L87 Difference]: Start difference. First operand 639 states and 1412 transitions. Second operand 18 states. [2018-12-31 17:25:05,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:05,189 INFO L93 Difference]: Finished difference Result 786 states and 1755 transitions. [2018-12-31 17:25:05,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-31 17:25:05,190 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2018-12-31 17:25:05,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:05,193 INFO L225 Difference]: With dead ends: 786 [2018-12-31 17:25:05,193 INFO L226 Difference]: Without dead ends: 655 [2018-12-31 17:25:05,194 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2018-12-31 17:25:05,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2018-12-31 17:25:05,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 460. [2018-12-31 17:25:05,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-12-31 17:25:05,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1054 transitions. [2018-12-31 17:25:05,200 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1054 transitions. Word has length 69 [2018-12-31 17:25:05,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:05,201 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 1054 transitions. [2018-12-31 17:25:05,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-31 17:25:05,201 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1054 transitions. [2018-12-31 17:25:05,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-31 17:25:05,202 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:05,202 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 17:25:05,202 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:05,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:05,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1657792755, now seen corresponding path program 20 times [2018-12-31 17:25:05,202 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:05,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:05,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:05,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:25:05,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:05,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:05,372 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 17:25:05,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:05,373 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 17:25:05,384 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 17:25:05,409 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 17:25:05,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:05,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:05,460 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 17:25:05,478 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:05,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-12-31 17:25:05,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-31 17:25:05,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-31 17:25:05,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2018-12-31 17:25:05,479 INFO L87 Difference]: Start difference. First operand 460 states and 1054 transitions. Second operand 18 states. [2018-12-31 17:25:05,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:05,821 INFO L93 Difference]: Finished difference Result 802 states and 1787 transitions. [2018-12-31 17:25:05,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-31 17:25:05,822 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2018-12-31 17:25:05,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:05,826 INFO L225 Difference]: With dead ends: 802 [2018-12-31 17:25:05,827 INFO L226 Difference]: Without dead ends: 671 [2018-12-31 17:25:05,827 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=708, Unknown=0, NotChecked=0, Total=992 [2018-12-31 17:25:05,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2018-12-31 17:25:05,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 671. [2018-12-31 17:25:05,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 671 states. [2018-12-31 17:25:05,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1476 transitions. [2018-12-31 17:25:05,836 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1476 transitions. Word has length 69 [2018-12-31 17:25:05,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:05,838 INFO L480 AbstractCegarLoop]: Abstraction has 671 states and 1476 transitions. [2018-12-31 17:25:05,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-31 17:25:05,838 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1476 transitions. [2018-12-31 17:25:05,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-31 17:25:05,839 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:05,841 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 17:25:05,842 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:05,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:05,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1119275478, now seen corresponding path program 21 times [2018-12-31 17:25:05,842 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:05,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:05,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:05,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:05,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:05,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:06,251 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 17:25:06,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:06,251 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 17:25:06,262 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 17:25:06,293 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-12-31 17:25:06,294 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:06,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:06,363 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 17:25:06,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:06,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-12-31 17:25:06,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-31 17:25:06,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-31 17:25:06,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2018-12-31 17:25:06,382 INFO L87 Difference]: Start difference. First operand 671 states and 1476 transitions. Second operand 19 states. [2018-12-31 17:25:06,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:06,752 INFO L93 Difference]: Finished difference Result 818 states and 1819 transitions. [2018-12-31 17:25:06,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-31 17:25:06,754 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2018-12-31 17:25:06,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:06,758 INFO L225 Difference]: With dead ends: 818 [2018-12-31 17:25:06,758 INFO L226 Difference]: Without dead ends: 687 [2018-12-31 17:25:06,759 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2018-12-31 17:25:06,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2018-12-31 17:25:06,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 476. [2018-12-31 17:25:06,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2018-12-31 17:25:06,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1086 transitions. [2018-12-31 17:25:06,767 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1086 transitions. Word has length 73 [2018-12-31 17:25:06,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:06,767 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 1086 transitions. [2018-12-31 17:25:06,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-31 17:25:06,767 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1086 transitions. [2018-12-31 17:25:06,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-31 17:25:06,768 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:06,768 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 17:25:06,769 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:06,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:06,769 INFO L82 PathProgramCache]: Analyzing trace with hash -690633686, now seen corresponding path program 22 times [2018-12-31 17:25:06,769 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:06,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:06,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:06,771 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:06,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:07,004 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 17:25:07,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:07,004 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 17:25:07,016 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 17:25:07,041 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 17:25:07,041 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:07,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:07,071 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 17:25:07,089 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:07,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-12-31 17:25:07,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-31 17:25:07,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-31 17:25:07,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2018-12-31 17:25:07,091 INFO L87 Difference]: Start difference. First operand 476 states and 1086 transitions. Second operand 19 states. [2018-12-31 17:25:07,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:07,490 INFO L93 Difference]: Finished difference Result 834 states and 1851 transitions. [2018-12-31 17:25:07,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-31 17:25:07,491 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2018-12-31 17:25:07,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:07,496 INFO L225 Difference]: With dead ends: 834 [2018-12-31 17:25:07,496 INFO L226 Difference]: Without dead ends: 703 [2018-12-31 17:25:07,496 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=338, Invalid=784, Unknown=0, NotChecked=0, Total=1122 [2018-12-31 17:25:07,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2018-12-31 17:25:07,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 703. [2018-12-31 17:25:07,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2018-12-31 17:25:07,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1540 transitions. [2018-12-31 17:25:07,506 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1540 transitions. Word has length 73 [2018-12-31 17:25:07,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:07,506 INFO L480 AbstractCegarLoop]: Abstraction has 703 states and 1540 transitions. [2018-12-31 17:25:07,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-31 17:25:07,507 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1540 transitions. [2018-12-31 17:25:07,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-12-31 17:25:07,508 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:07,508 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 17:25:07,508 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:07,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:07,508 INFO L82 PathProgramCache]: Analyzing trace with hash -119534393, now seen corresponding path program 23 times [2018-12-31 17:25:07,509 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:07,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:07,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:07,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:07,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:07,756 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 17:25:07,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:07,756 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 17:25:07,768 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 17:25:07,798 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-12-31 17:25:07,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:07,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:07,841 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 17:25:07,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:07,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-12-31 17:25:07,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-31 17:25:07,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-31 17:25:07,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2018-12-31 17:25:07,870 INFO L87 Difference]: Start difference. First operand 703 states and 1540 transitions. Second operand 20 states. [2018-12-31 17:25:08,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:08,390 INFO L93 Difference]: Finished difference Result 850 states and 1883 transitions. [2018-12-31 17:25:08,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-31 17:25:08,391 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 77 [2018-12-31 17:25:08,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:08,395 INFO L225 Difference]: With dead ends: 850 [2018-12-31 17:25:08,395 INFO L226 Difference]: Without dead ends: 719 [2018-12-31 17:25:08,397 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=379, Invalid=881, Unknown=0, NotChecked=0, Total=1260 [2018-12-31 17:25:08,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2018-12-31 17:25:08,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 492. [2018-12-31 17:25:08,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 492 states. [2018-12-31 17:25:08,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1118 transitions. [2018-12-31 17:25:08,405 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1118 transitions. Word has length 77 [2018-12-31 17:25:08,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:08,405 INFO L480 AbstractCegarLoop]: Abstraction has 492 states and 1118 transitions. [2018-12-31 17:25:08,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-31 17:25:08,405 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1118 transitions. [2018-12-31 17:25:08,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-12-31 17:25:08,406 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:08,406 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 17:25:08,407 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:08,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:08,407 INFO L82 PathProgramCache]: Analyzing trace with hash -604365075, now seen corresponding path program 24 times [2018-12-31 17:25:08,407 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:08,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:08,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:08,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:08,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:08,645 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 17:25:08,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:08,645 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 17:25:08,657 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 17:25:08,790 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-12-31 17:25:08,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:08,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:08,855 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 17:25:08,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:08,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-12-31 17:25:08,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-31 17:25:08,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-31 17:25:08,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2018-12-31 17:25:08,874 INFO L87 Difference]: Start difference. First operand 492 states and 1118 transitions. Second operand 20 states. [2018-12-31 17:25:09,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:09,252 INFO L93 Difference]: Finished difference Result 866 states and 1915 transitions. [2018-12-31 17:25:09,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-31 17:25:09,254 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 77 [2018-12-31 17:25:09,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:09,257 INFO L225 Difference]: With dead ends: 866 [2018-12-31 17:25:09,257 INFO L226 Difference]: Without dead ends: 735 [2018-12-31 17:25:09,258 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=359, Invalid=901, Unknown=0, NotChecked=0, Total=1260 [2018-12-31 17:25:09,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2018-12-31 17:25:09,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 735. [2018-12-31 17:25:09,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 735 states. [2018-12-31 17:25:09,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1604 transitions. [2018-12-31 17:25:09,267 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1604 transitions. Word has length 77 [2018-12-31 17:25:09,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:09,267 INFO L480 AbstractCegarLoop]: Abstraction has 735 states and 1604 transitions. [2018-12-31 17:25:09,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-31 17:25:09,267 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1604 transitions. [2018-12-31 17:25:09,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-12-31 17:25:09,268 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:09,269 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 17:25:09,269 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:09,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:09,269 INFO L82 PathProgramCache]: Analyzing trace with hash -398143222, now seen corresponding path program 25 times [2018-12-31 17:25:09,269 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:09,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:09,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:09,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:09,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:09,499 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 17:25:09,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:09,500 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 17:25:09,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:25:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:09,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:09,572 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 17:25:09,590 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:09,590 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-12-31 17:25:09,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-31 17:25:09,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-31 17:25:09,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2018-12-31 17:25:09,591 INFO L87 Difference]: Start difference. First operand 735 states and 1604 transitions. Second operand 21 states. [2018-12-31 17:25:10,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:10,000 INFO L93 Difference]: Finished difference Result 882 states and 1947 transitions. [2018-12-31 17:25:10,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-31 17:25:10,001 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2018-12-31 17:25:10,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:10,005 INFO L225 Difference]: With dead ends: 882 [2018-12-31 17:25:10,006 INFO L226 Difference]: Without dead ends: 751 [2018-12-31 17:25:10,006 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=969, Unknown=0, NotChecked=0, Total=1406 [2018-12-31 17:25:10,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2018-12-31 17:25:10,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 508. [2018-12-31 17:25:10,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2018-12-31 17:25:10,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1150 transitions. [2018-12-31 17:25:10,014 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1150 transitions. Word has length 81 [2018-12-31 17:25:10,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:10,015 INFO L480 AbstractCegarLoop]: Abstraction has 508 states and 1150 transitions. [2018-12-31 17:25:10,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-31 17:25:10,015 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1150 transitions. [2018-12-31 17:25:10,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-12-31 17:25:10,016 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:10,016 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 17:25:10,016 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:10,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:10,016 INFO L82 PathProgramCache]: Analyzing trace with hash 261676042, now seen corresponding path program 26 times [2018-12-31 17:25:10,016 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:10,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:10,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:10,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:25:10,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:10,686 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 17:25:10,687 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:10,687 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 17:25:10,698 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 17:25:10,726 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 17:25:10,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:10,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:10,761 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 17:25:10,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:10,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-12-31 17:25:10,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-31 17:25:10,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-31 17:25:10,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2018-12-31 17:25:10,781 INFO L87 Difference]: Start difference. First operand 508 states and 1150 transitions. Second operand 21 states. [2018-12-31 17:25:11,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:11,440 INFO L93 Difference]: Finished difference Result 898 states and 1979 transitions. [2018-12-31 17:25:11,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-31 17:25:11,442 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2018-12-31 17:25:11,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:11,446 INFO L225 Difference]: With dead ends: 898 [2018-12-31 17:25:11,446 INFO L226 Difference]: Without dead ends: 767 [2018-12-31 17:25:11,447 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=424, Invalid=982, Unknown=0, NotChecked=0, Total=1406 [2018-12-31 17:25:11,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2018-12-31 17:25:11,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2018-12-31 17:25:11,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2018-12-31 17:25:11,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1668 transitions. [2018-12-31 17:25:11,456 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1668 transitions. Word has length 81 [2018-12-31 17:25:11,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:11,457 INFO L480 AbstractCegarLoop]: Abstraction has 767 states and 1668 transitions. [2018-12-31 17:25:11,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-31 17:25:11,458 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1668 transitions. [2018-12-31 17:25:11,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-12-31 17:25:11,459 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:11,459 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 17:25:11,459 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:11,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:11,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1261226073, now seen corresponding path program 27 times [2018-12-31 17:25:11,460 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:11,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:11,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:11,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:11,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:11,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:11,840 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 17:25:11,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:11,841 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 17:25:11,856 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 17:25:11,957 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-31 17:25:11,957 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:11,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:12,014 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 17:25:12,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:12,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-12-31 17:25:12,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-31 17:25:12,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-31 17:25:12,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2018-12-31 17:25:12,035 INFO L87 Difference]: Start difference. First operand 767 states and 1668 transitions. Second operand 22 states. [2018-12-31 17:25:12,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:12,522 INFO L93 Difference]: Finished difference Result 914 states and 2011 transitions. [2018-12-31 17:25:12,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-31 17:25:12,523 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 85 [2018-12-31 17:25:12,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:12,527 INFO L225 Difference]: With dead ends: 914 [2018-12-31 17:25:12,527 INFO L226 Difference]: Without dead ends: 783 [2018-12-31 17:25:12,528 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=470, Invalid=1090, Unknown=0, NotChecked=0, Total=1560 [2018-12-31 17:25:12,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2018-12-31 17:25:12,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 524. [2018-12-31 17:25:12,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2018-12-31 17:25:12,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1182 transitions. [2018-12-31 17:25:12,538 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1182 transitions. Word has length 85 [2018-12-31 17:25:12,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:12,538 INFO L480 AbstractCegarLoop]: Abstraction has 524 states and 1182 transitions. [2018-12-31 17:25:12,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-31 17:25:12,539 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1182 transitions. [2018-12-31 17:25:12,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-12-31 17:25:12,539 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:12,540 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 17:25:12,540 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:12,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:12,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1269712589, now seen corresponding path program 28 times [2018-12-31 17:25:12,540 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:12,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:12,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:12,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:12,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:13,227 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 17:25:13,227 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:13,227 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 17:25:13,239 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 17:25:13,271 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 17:25:13,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:13,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:13,314 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 17:25:13,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:13,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-12-31 17:25:13,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-31 17:25:13,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-31 17:25:13,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2018-12-31 17:25:13,334 INFO L87 Difference]: Start difference. First operand 524 states and 1182 transitions. Second operand 22 states. [2018-12-31 17:25:13,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:13,782 INFO L93 Difference]: Finished difference Result 930 states and 2043 transitions. [2018-12-31 17:25:13,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-31 17:25:13,783 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 85 [2018-12-31 17:25:13,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:13,788 INFO L225 Difference]: With dead ends: 930 [2018-12-31 17:25:13,788 INFO L226 Difference]: Without dead ends: 799 [2018-12-31 17:25:13,789 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=450, Invalid=1032, Unknown=0, NotChecked=0, Total=1482 [2018-12-31 17:25:13,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2018-12-31 17:25:13,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 799. [2018-12-31 17:25:13,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 799 states. [2018-12-31 17:25:13,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1732 transitions. [2018-12-31 17:25:13,800 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1732 transitions. Word has length 85 [2018-12-31 17:25:13,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:13,800 INFO L480 AbstractCegarLoop]: Abstraction has 799 states and 1732 transitions. [2018-12-31 17:25:13,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-31 17:25:13,801 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1732 transitions. [2018-12-31 17:25:13,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-12-31 17:25:13,802 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:13,802 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 17:25:13,802 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:13,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:13,803 INFO L82 PathProgramCache]: Analyzing trace with hash -823686166, now seen corresponding path program 29 times [2018-12-31 17:25:13,803 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:13,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:13,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:13,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:13,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:14,048 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 17:25:14,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:14,048 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 17:25:14,060 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 17:25:14,095 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-12-31 17:25:14,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:14,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:14,130 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 17:25:14,148 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:14,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-12-31 17:25:14,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-31 17:25:14,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-31 17:25:14,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2018-12-31 17:25:14,149 INFO L87 Difference]: Start difference. First operand 799 states and 1732 transitions. Second operand 23 states. [2018-12-31 17:25:15,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:15,009 INFO L93 Difference]: Finished difference Result 946 states and 2075 transitions. [2018-12-31 17:25:15,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-31 17:25:15,010 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 89 [2018-12-31 17:25:15,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:15,014 INFO L225 Difference]: With dead ends: 946 [2018-12-31 17:25:15,014 INFO L226 Difference]: Without dead ends: 815 [2018-12-31 17:25:15,015 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=535, Invalid=1187, Unknown=0, NotChecked=0, Total=1722 [2018-12-31 17:25:15,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2018-12-31 17:25:15,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 540. [2018-12-31 17:25:15,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2018-12-31 17:25:15,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1214 transitions. [2018-12-31 17:25:15,024 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1214 transitions. Word has length 89 [2018-12-31 17:25:15,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:15,025 INFO L480 AbstractCegarLoop]: Abstraction has 540 states and 1214 transitions. [2018-12-31 17:25:15,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-31 17:25:15,025 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1214 transitions. [2018-12-31 17:25:15,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-12-31 17:25:15,026 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:15,026 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 17:25:15,026 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:15,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:15,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1221192726, now seen corresponding path program 30 times [2018-12-31 17:25:15,027 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:15,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:15,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:15,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:15,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:15,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:15,525 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 17:25:15,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:15,525 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 17:25:15,537 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 17:25:15,574 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-12-31 17:25:15,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:15,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:15,612 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 17:25:15,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:15,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-12-31 17:25:15,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-31 17:25:15,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-31 17:25:15,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2018-12-31 17:25:15,632 INFO L87 Difference]: Start difference. First operand 540 states and 1214 transitions. Second operand 23 states. [2018-12-31 17:25:16,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:16,228 INFO L93 Difference]: Finished difference Result 962 states and 2107 transitions. [2018-12-31 17:25:16,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-31 17:25:16,229 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 89 [2018-12-31 17:25:16,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:16,233 INFO L225 Difference]: With dead ends: 962 [2018-12-31 17:25:16,233 INFO L226 Difference]: Without dead ends: 831 [2018-12-31 17:25:16,234 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2018-12-31 17:25:16,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2018-12-31 17:25:16,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 831. [2018-12-31 17:25:16,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2018-12-31 17:25:16,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1796 transitions. [2018-12-31 17:25:16,247 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1796 transitions. Word has length 89 [2018-12-31 17:25:16,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:16,248 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 1796 transitions. [2018-12-31 17:25:16,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-31 17:25:16,248 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1796 transitions. [2018-12-31 17:25:16,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-12-31 17:25:16,249 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:16,250 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 17:25:16,250 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:16,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:16,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1008893305, now seen corresponding path program 31 times [2018-12-31 17:25:16,250 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:16,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:16,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:16,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:16,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:16,733 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 17:25:16,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:16,733 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 17:25:16,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:25:16,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:16,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:16,838 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 17:25:16,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:16,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-12-31 17:25:16,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-31 17:25:16,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-31 17:25:16,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2018-12-31 17:25:16,858 INFO L87 Difference]: Start difference. First operand 831 states and 1796 transitions. Second operand 24 states. [2018-12-31 17:25:17,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:17,381 INFO L93 Difference]: Finished difference Result 978 states and 2139 transitions. [2018-12-31 17:25:17,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-31 17:25:17,390 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2018-12-31 17:25:17,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:17,394 INFO L225 Difference]: With dead ends: 978 [2018-12-31 17:25:17,394 INFO L226 Difference]: Without dead ends: 847 [2018-12-31 17:25:17,395 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=571, Invalid=1321, Unknown=0, NotChecked=0, Total=1892 [2018-12-31 17:25:17,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2018-12-31 17:25:17,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 556. [2018-12-31 17:25:17,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2018-12-31 17:25:17,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1246 transitions. [2018-12-31 17:25:17,406 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1246 transitions. Word has length 93 [2018-12-31 17:25:17,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:17,409 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 1246 transitions. [2018-12-31 17:25:17,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-31 17:25:17,409 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1246 transitions. [2018-12-31 17:25:17,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-12-31 17:25:17,410 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:17,410 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 17:25:17,411 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:17,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:17,411 INFO L82 PathProgramCache]: Analyzing trace with hash -265515347, now seen corresponding path program 32 times [2018-12-31 17:25:17,411 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:17,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:17,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:17,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:25:17,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:17,657 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 17:25:17,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:17,657 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 17:25:17,670 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 17:25:17,700 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 17:25:17,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:17,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:17,752 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 17:25:17,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:17,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-12-31 17:25:17,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-31 17:25:17,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-31 17:25:17,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2018-12-31 17:25:17,772 INFO L87 Difference]: Start difference. First operand 556 states and 1246 transitions. Second operand 24 states. [2018-12-31 17:25:18,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:18,300 INFO L93 Difference]: Finished difference Result 994 states and 2171 transitions. [2018-12-31 17:25:18,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-31 17:25:18,301 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2018-12-31 17:25:18,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:18,304 INFO L225 Difference]: With dead ends: 994 [2018-12-31 17:25:18,304 INFO L226 Difference]: Without dead ends: 863 [2018-12-31 17:25:18,305 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=536, Invalid=1356, Unknown=0, NotChecked=0, Total=1892 [2018-12-31 17:25:18,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2018-12-31 17:25:18,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 863. [2018-12-31 17:25:18,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 863 states. [2018-12-31 17:25:18,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1860 transitions. [2018-12-31 17:25:18,315 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1860 transitions. Word has length 93 [2018-12-31 17:25:18,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:18,315 INFO L480 AbstractCegarLoop]: Abstraction has 863 states and 1860 transitions. [2018-12-31 17:25:18,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-31 17:25:18,315 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1860 transitions. [2018-12-31 17:25:18,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-12-31 17:25:18,317 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:18,317 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 17:25:18,317 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:18,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:18,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1745970890, now seen corresponding path program 33 times [2018-12-31 17:25:18,317 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:18,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:18,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:18,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:18,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:18,561 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 17:25:18,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:18,561 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 17:25:18,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 17:25:18,608 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-12-31 17:25:18,608 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:18,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:18,656 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 17:25:18,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:18,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-12-31 17:25:18,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-31 17:25:18,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-31 17:25:18,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2018-12-31 17:25:18,685 INFO L87 Difference]: Start difference. First operand 863 states and 1860 transitions. Second operand 25 states. [2018-12-31 17:25:19,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:19,209 INFO L93 Difference]: Finished difference Result 1010 states and 2203 transitions. [2018-12-31 17:25:19,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-12-31 17:25:19,216 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2018-12-31 17:25:19,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:19,218 INFO L225 Difference]: With dead ends: 1010 [2018-12-31 17:25:19,219 INFO L226 Difference]: Without dead ends: 879 [2018-12-31 17:25:19,220 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=579, Invalid=1491, Unknown=0, NotChecked=0, Total=2070 [2018-12-31 17:25:19,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2018-12-31 17:25:19,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 572. [2018-12-31 17:25:19,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2018-12-31 17:25:19,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1278 transitions. [2018-12-31 17:25:19,229 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1278 transitions. Word has length 97 [2018-12-31 17:25:19,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:19,229 INFO L480 AbstractCegarLoop]: Abstraction has 572 states and 1278 transitions. [2018-12-31 17:25:19,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-31 17:25:19,229 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1278 transitions. [2018-12-31 17:25:19,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-12-31 17:25:19,230 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:19,231 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 17:25:19,231 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:19,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:19,231 INFO L82 PathProgramCache]: Analyzing trace with hash -510825526, now seen corresponding path program 34 times [2018-12-31 17:25:19,231 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:19,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:19,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:19,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:19,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:19,652 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 17:25:19,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:19,652 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 17:25:19,686 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 17:25:19,716 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 17:25:19,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:19,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:19,772 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 17:25:19,790 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:19,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-12-31 17:25:19,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-31 17:25:19,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-31 17:25:19,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2018-12-31 17:25:19,791 INFO L87 Difference]: Start difference. First operand 572 states and 1278 transitions. Second operand 25 states. [2018-12-31 17:25:20,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:20,534 INFO L93 Difference]: Finished difference Result 1026 states and 2235 transitions. [2018-12-31 17:25:20,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-12-31 17:25:20,536 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2018-12-31 17:25:20,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:20,538 INFO L225 Difference]: With dead ends: 1026 [2018-12-31 17:25:20,539 INFO L226 Difference]: Without dead ends: 895 [2018-12-31 17:25:20,540 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=626, Invalid=1444, Unknown=0, NotChecked=0, Total=2070 [2018-12-31 17:25:20,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2018-12-31 17:25:20,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 895. [2018-12-31 17:25:20,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 895 states. [2018-12-31 17:25:20,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1924 transitions. [2018-12-31 17:25:20,552 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1924 transitions. Word has length 97 [2018-12-31 17:25:20,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:20,552 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 1924 transitions. [2018-12-31 17:25:20,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-31 17:25:20,552 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1924 transitions. [2018-12-31 17:25:20,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-12-31 17:25:20,554 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:20,554 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 17:25:20,554 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:20,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:20,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1394676377, now seen corresponding path program 35 times [2018-12-31 17:25:20,555 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:20,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:20,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:20,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:20,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:21,461 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:21,461 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 17:25:21,473 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 17:25:21,511 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-12-31 17:25:21,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:21,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:21,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:21,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-12-31 17:25:21,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-12-31 17:25:21,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-12-31 17:25:21,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2018-12-31 17:25:21,603 INFO L87 Difference]: Start difference. First operand 895 states and 1924 transitions. Second operand 26 states. [2018-12-31 17:25:22,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:22,692 INFO L93 Difference]: Finished difference Result 1042 states and 2267 transitions. [2018-12-31 17:25:22,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-12-31 17:25:22,693 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 101 [2018-12-31 17:25:22,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:22,695 INFO L225 Difference]: With dead ends: 1042 [2018-12-31 17:25:22,695 INFO L226 Difference]: Without dead ends: 911 [2018-12-31 17:25:22,696 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=682, Invalid=1574, Unknown=0, NotChecked=0, Total=2256 [2018-12-31 17:25:22,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2018-12-31 17:25:22,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 588. [2018-12-31 17:25:22,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 588 states. [2018-12-31 17:25:22,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1310 transitions. [2018-12-31 17:25:22,707 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1310 transitions. Word has length 101 [2018-12-31 17:25:22,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:22,707 INFO L480 AbstractCegarLoop]: Abstraction has 588 states and 1310 transitions. [2018-12-31 17:25:22,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-12-31 17:25:22,707 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1310 transitions. [2018-12-31 17:25:22,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-12-31 17:25:22,708 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:22,708 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 17:25:22,708 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:22,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:22,709 INFO L82 PathProgramCache]: Analyzing trace with hash -313198963, now seen corresponding path program 36 times [2018-12-31 17:25:22,709 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:22,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:22,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:22,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:22,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:23,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:23,595 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 17:25:23,608 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 17:25:23,646 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-12-31 17:25:23,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:23,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:24,043 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:24,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:24,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-12-31 17:25:24,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-12-31 17:25:24,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-12-31 17:25:24,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2018-12-31 17:25:24,080 INFO L87 Difference]: Start difference. First operand 588 states and 1310 transitions. Second operand 26 states. [2018-12-31 17:25:24,343 WARN L181 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-12-31 17:25:24,577 WARN L181 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-12-31 17:25:24,871 WARN L181 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-12-31 17:25:25,156 WARN L181 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-12-31 17:25:25,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:25,917 INFO L93 Difference]: Finished difference Result 1058 states and 2299 transitions. [2018-12-31 17:25:25,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-12-31 17:25:25,918 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 101 [2018-12-31 17:25:25,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:25,921 INFO L225 Difference]: With dead ends: 1058 [2018-12-31 17:25:25,921 INFO L226 Difference]: Without dead ends: 927 [2018-12-31 17:25:25,923 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=638, Invalid=1618, Unknown=0, NotChecked=0, Total=2256 [2018-12-31 17:25:25,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2018-12-31 17:25:25,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 927. [2018-12-31 17:25:25,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 927 states. [2018-12-31 17:25:25,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1988 transitions. [2018-12-31 17:25:25,936 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1988 transitions. Word has length 101 [2018-12-31 17:25:25,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:25,936 INFO L480 AbstractCegarLoop]: Abstraction has 927 states and 1988 transitions. [2018-12-31 17:25:25,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-12-31 17:25:25,936 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1988 transitions. [2018-12-31 17:25:25,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-12-31 17:25:25,938 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:25,938 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 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 17:25:25,938 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:25,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:25,938 INFO L82 PathProgramCache]: Analyzing trace with hash -895327830, now seen corresponding path program 37 times [2018-12-31 17:25:25,938 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:25,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:25,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:25,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:25,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:26,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:26,252 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:25:26,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:25:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:26,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:26,392 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:26,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:26,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-12-31 17:25:26,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-12-31 17:25:26,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-12-31 17:25:26,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2018-12-31 17:25:26,446 INFO L87 Difference]: Start difference. First operand 927 states and 1988 transitions. Second operand 27 states. [2018-12-31 17:25:26,777 WARN L181 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2018-12-31 17:25:27,082 WARN L181 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-12-31 17:25:27,373 WARN L181 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2018-12-31 17:25:27,674 WARN L181 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-12-31 17:25:28,019 WARN L181 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2018-12-31 17:25:28,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:28,542 INFO L93 Difference]: Finished difference Result 1074 states and 2331 transitions. [2018-12-31 17:25:28,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-12-31 17:25:28,543 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 105 [2018-12-31 17:25:28,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:28,546 INFO L225 Difference]: With dead ends: 1074 [2018-12-31 17:25:28,546 INFO L226 Difference]: Without dead ends: 943 [2018-12-31 17:25:28,548 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=761, Invalid=1689, Unknown=0, NotChecked=0, Total=2450 [2018-12-31 17:25:28,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2018-12-31 17:25:28,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 604. [2018-12-31 17:25:28,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2018-12-31 17:25:28,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1342 transitions. [2018-12-31 17:25:28,559 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1342 transitions. Word has length 105 [2018-12-31 17:25:28,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:28,559 INFO L480 AbstractCegarLoop]: Abstraction has 604 states and 1342 transitions. [2018-12-31 17:25:28,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-12-31 17:25:28,559 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1342 transitions. [2018-12-31 17:25:28,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-12-31 17:25:28,560 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:28,560 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 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 17:25:28,560 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:28,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:28,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1031871574, now seen corresponding path program 38 times [2018-12-31 17:25:28,561 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:28,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:28,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:28,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:25:28,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:28,923 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:28,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:28,924 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:25:28,936 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 17:25:28,991 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 17:25:28,991 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:28,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:29,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:29,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-12-31 17:25:29,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-12-31 17:25:29,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-12-31 17:25:29,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2018-12-31 17:25:29,054 INFO L87 Difference]: Start difference. First operand 604 states and 1342 transitions. Second operand 27 states. [2018-12-31 17:25:29,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:29,713 INFO L93 Difference]: Finished difference Result 1090 states and 2363 transitions. [2018-12-31 17:25:29,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-12-31 17:25:29,714 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 105 [2018-12-31 17:25:29,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:29,718 INFO L225 Difference]: With dead ends: 1090 [2018-12-31 17:25:29,718 INFO L226 Difference]: Without dead ends: 959 [2018-12-31 17:25:29,719 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=742, Invalid=1708, Unknown=0, NotChecked=0, Total=2450 [2018-12-31 17:25:29,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2018-12-31 17:25:29,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 959. [2018-12-31 17:25:29,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2018-12-31 17:25:29,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 2052 transitions. [2018-12-31 17:25:29,734 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 2052 transitions. Word has length 105 [2018-12-31 17:25:29,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:29,734 INFO L480 AbstractCegarLoop]: Abstraction has 959 states and 2052 transitions. [2018-12-31 17:25:29,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-12-31 17:25:29,735 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 2052 transitions. [2018-12-31 17:25:29,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-12-31 17:25:29,740 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:29,740 INFO L402 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 10, 10, 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 17:25:29,740 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:29,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:29,740 INFO L82 PathProgramCache]: Analyzing trace with hash 381122631, now seen corresponding path program 39 times [2018-12-31 17:25:29,741 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:29,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:29,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:29,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:29,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:30,142 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:30,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:30,142 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:25:30,155 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 17:25:30,195 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-12-31 17:25:30,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:30,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:30,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:30,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-12-31 17:25:30,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-12-31 17:25:30,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-12-31 17:25:30,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2018-12-31 17:25:30,264 INFO L87 Difference]: Start difference. First operand 959 states and 2052 transitions. Second operand 28 states. [2018-12-31 17:25:30,525 WARN L181 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-12-31 17:25:30,907 WARN L181 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2018-12-31 17:25:31,230 WARN L181 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-12-31 17:25:32,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:32,114 INFO L93 Difference]: Finished difference Result 1106 states and 2395 transitions. [2018-12-31 17:25:32,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-31 17:25:32,116 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 109 [2018-12-31 17:25:32,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:32,118 INFO L225 Difference]: With dead ends: 1106 [2018-12-31 17:25:32,118 INFO L226 Difference]: Without dead ends: 975 [2018-12-31 17:25:32,120 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=803, Invalid=1849, Unknown=0, NotChecked=0, Total=2652 [2018-12-31 17:25:32,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2018-12-31 17:25:32,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 620. [2018-12-31 17:25:32,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2018-12-31 17:25:32,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1374 transitions. [2018-12-31 17:25:32,134 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1374 transitions. Word has length 109 [2018-12-31 17:25:32,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:32,135 INFO L480 AbstractCegarLoop]: Abstraction has 620 states and 1374 transitions. [2018-12-31 17:25:32,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-12-31 17:25:32,135 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1374 transitions. [2018-12-31 17:25:32,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-12-31 17:25:32,139 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:32,139 INFO L402 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 10, 10, 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 17:25:32,140 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:32,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:32,140 INFO L82 PathProgramCache]: Analyzing trace with hash -2029552019, now seen corresponding path program 40 times [2018-12-31 17:25:32,140 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:32,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:32,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:32,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:32,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:32,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:32,507 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:25:32,518 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 17:25:32,575 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 17:25:32,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:32,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:32,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:32,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-12-31 17:25:32,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-12-31 17:25:32,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-12-31 17:25:32,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2018-12-31 17:25:32,640 INFO L87 Difference]: Start difference. First operand 620 states and 1374 transitions. Second operand 28 states. [2018-12-31 17:25:33,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:33,300 INFO L93 Difference]: Finished difference Result 1122 states and 2427 transitions. [2018-12-31 17:25:33,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-12-31 17:25:33,301 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 109 [2018-12-31 17:25:33,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:33,303 INFO L225 Difference]: With dead ends: 1122 [2018-12-31 17:25:33,303 INFO L226 Difference]: Without dead ends: 991 [2018-12-31 17:25:33,304 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=777, Invalid=1773, Unknown=0, NotChecked=0, Total=2550 [2018-12-31 17:25:33,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2018-12-31 17:25:33,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 991. [2018-12-31 17:25:33,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 991 states. [2018-12-31 17:25:33,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 2116 transitions. [2018-12-31 17:25:33,323 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 2116 transitions. Word has length 109 [2018-12-31 17:25:33,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:33,323 INFO L480 AbstractCegarLoop]: Abstraction has 991 states and 2116 transitions. [2018-12-31 17:25:33,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-12-31 17:25:33,323 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 2116 transitions. [2018-12-31 17:25:33,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-12-31 17:25:33,328 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:33,329 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 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 17:25:33,329 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:33,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:33,329 INFO L82 PathProgramCache]: Analyzing trace with hash 763001994, now seen corresponding path program 41 times [2018-12-31 17:25:33,329 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:33,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:33,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:33,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:33,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:33,670 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:33,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:33,670 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:25:33,683 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 17:25:33,725 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-12-31 17:25:33,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:33,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:33,838 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:33,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:33,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-12-31 17:25:33,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-12-31 17:25:33,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-12-31 17:25:33,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2018-12-31 17:25:33,858 INFO L87 Difference]: Start difference. First operand 991 states and 2116 transitions. Second operand 29 states. [2018-12-31 17:25:34,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:34,545 INFO L93 Difference]: Finished difference Result 1138 states and 2459 transitions. [2018-12-31 17:25:34,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-12-31 17:25:34,549 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 113 [2018-12-31 17:25:34,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:34,550 INFO L225 Difference]: With dead ends: 1138 [2018-12-31 17:25:34,550 INFO L226 Difference]: Without dead ends: 1007 [2018-12-31 17:25:34,551 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=889, Invalid=1973, Unknown=0, NotChecked=0, Total=2862 [2018-12-31 17:25:34,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2018-12-31 17:25:34,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 636. [2018-12-31 17:25:34,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2018-12-31 17:25:34,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1406 transitions. [2018-12-31 17:25:34,561 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1406 transitions. Word has length 113 [2018-12-31 17:25:34,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:34,561 INFO L480 AbstractCegarLoop]: Abstraction has 636 states and 1406 transitions. [2018-12-31 17:25:34,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-12-31 17:25:34,561 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1406 transitions. [2018-12-31 17:25:34,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-12-31 17:25:34,562 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:34,562 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 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 17:25:34,563 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:34,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:34,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1377141878, now seen corresponding path program 42 times [2018-12-31 17:25:34,563 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:34,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:34,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:34,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:34,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:34,878 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:34,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:34,878 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:25:34,893 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 17:25:34,935 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-12-31 17:25:34,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:34,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:34,992 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:35,010 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:35,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-12-31 17:25:35,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-12-31 17:25:35,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-12-31 17:25:35,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2018-12-31 17:25:35,011 INFO L87 Difference]: Start difference. First operand 636 states and 1406 transitions. Second operand 29 states. [2018-12-31 17:25:35,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:35,830 INFO L93 Difference]: Finished difference Result 1154 states and 2491 transitions. [2018-12-31 17:25:35,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-12-31 17:25:35,831 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 113 [2018-12-31 17:25:35,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:35,834 INFO L225 Difference]: With dead ends: 1154 [2018-12-31 17:25:35,834 INFO L226 Difference]: Without dead ends: 1023 [2018-12-31 17:25:35,835 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2018-12-31 17:25:35,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2018-12-31 17:25:35,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 1023. [2018-12-31 17:25:35,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1023 states. [2018-12-31 17:25:35,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 2180 transitions. [2018-12-31 17:25:35,850 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 2180 transitions. Word has length 113 [2018-12-31 17:25:35,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:35,851 INFO L480 AbstractCegarLoop]: Abstraction has 1023 states and 2180 transitions. [2018-12-31 17:25:35,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-12-31 17:25:35,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 2180 transitions. [2018-12-31 17:25:35,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-12-31 17:25:35,852 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:35,857 INFO L402 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 11, 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 17:25:35,857 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:35,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:35,857 INFO L82 PathProgramCache]: Analyzing trace with hash -934862041, now seen corresponding path program 43 times [2018-12-31 17:25:35,858 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:35,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:35,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:35,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:35,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:36,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:36,261 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:25:36,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:25:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:36,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:36,373 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:36,391 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:36,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-12-31 17:25:36,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-12-31 17:25:36,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-12-31 17:25:36,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2018-12-31 17:25:36,392 INFO L87 Difference]: Start difference. First operand 1023 states and 2180 transitions. Second operand 30 states. [2018-12-31 17:25:37,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:37,250 INFO L93 Difference]: Finished difference Result 1170 states and 2523 transitions. [2018-12-31 17:25:37,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-31 17:25:37,252 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 117 [2018-12-31 17:25:37,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:37,255 INFO L225 Difference]: With dead ends: 1170 [2018-12-31 17:25:37,255 INFO L226 Difference]: Without dead ends: 1039 [2018-12-31 17:25:37,256 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=934, Invalid=2146, Unknown=0, NotChecked=0, Total=3080 [2018-12-31 17:25:37,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2018-12-31 17:25:37,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 652. [2018-12-31 17:25:37,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2018-12-31 17:25:37,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1438 transitions. [2018-12-31 17:25:37,265 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1438 transitions. Word has length 117 [2018-12-31 17:25:37,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:37,266 INFO L480 AbstractCegarLoop]: Abstraction has 652 states and 1438 transitions. [2018-12-31 17:25:37,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-12-31 17:25:37,266 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1438 transitions. [2018-12-31 17:25:37,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-12-31 17:25:37,267 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:37,267 INFO L402 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 11, 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 17:25:37,267 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:37,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:37,267 INFO L82 PathProgramCache]: Analyzing trace with hash 556017229, now seen corresponding path program 44 times [2018-12-31 17:25:37,268 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:37,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:37,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:37,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:25:37,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:37,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:37,628 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:25:37,640 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 17:25:37,674 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 17:25:37,674 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:37,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:37,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:37,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-12-31 17:25:37,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-12-31 17:25:37,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-12-31 17:25:37,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2018-12-31 17:25:37,762 INFO L87 Difference]: Start difference. First operand 652 states and 1438 transitions. Second operand 30 states. [2018-12-31 17:25:38,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:38,550 INFO L93 Difference]: Finished difference Result 1186 states and 2555 transitions. [2018-12-31 17:25:38,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-31 17:25:38,552 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 117 [2018-12-31 17:25:38,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:38,554 INFO L225 Difference]: With dead ends: 1186 [2018-12-31 17:25:38,554 INFO L226 Difference]: Without dead ends: 1055 [2018-12-31 17:25:38,555 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=869, Invalid=2211, Unknown=0, NotChecked=0, Total=3080 [2018-12-31 17:25:38,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2018-12-31 17:25:38,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1055. [2018-12-31 17:25:38,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1055 states. [2018-12-31 17:25:38,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 2244 transitions. [2018-12-31 17:25:38,568 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 2244 transitions. Word has length 117 [2018-12-31 17:25:38,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:38,568 INFO L480 AbstractCegarLoop]: Abstraction has 1055 states and 2244 transitions. [2018-12-31 17:25:38,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-12-31 17:25:38,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 2244 transitions. [2018-12-31 17:25:38,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-12-31 17:25:38,570 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:38,570 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 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 17:25:38,570 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:38,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:38,570 INFO L82 PathProgramCache]: Analyzing trace with hash -411453590, now seen corresponding path program 45 times [2018-12-31 17:25:38,571 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:38,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:38,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:38,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:38,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:39,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:39,220 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:25:39,233 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 17:25:39,282 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-12-31 17:25:39,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:39,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:39,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:39,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-12-31 17:25:39,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-12-31 17:25:39,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-12-31 17:25:39,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2018-12-31 17:25:39,497 INFO L87 Difference]: Start difference. First operand 1055 states and 2244 transitions. Second operand 31 states. [2018-12-31 17:25:40,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:40,236 INFO L93 Difference]: Finished difference Result 1202 states and 2587 transitions. [2018-12-31 17:25:40,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-12-31 17:25:40,237 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 121 [2018-12-31 17:25:40,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:40,240 INFO L225 Difference]: With dead ends: 1202 [2018-12-31 17:25:40,240 INFO L226 Difference]: Without dead ends: 1071 [2018-12-31 17:25:40,240 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=924, Invalid=2382, Unknown=0, NotChecked=0, Total=3306 [2018-12-31 17:25:40,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2018-12-31 17:25:40,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 668. [2018-12-31 17:25:40,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 668 states. [2018-12-31 17:25:40,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1470 transitions. [2018-12-31 17:25:40,251 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1470 transitions. Word has length 121 [2018-12-31 17:25:40,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:40,251 INFO L480 AbstractCegarLoop]: Abstraction has 668 states and 1470 transitions. [2018-12-31 17:25:40,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-12-31 17:25:40,251 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1470 transitions. [2018-12-31 17:25:40,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-12-31 17:25:40,252 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:40,252 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 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 17:25:40,253 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:40,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:40,253 INFO L82 PathProgramCache]: Analyzing trace with hash 397423466, now seen corresponding path program 46 times [2018-12-31 17:25:40,253 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:40,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:40,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:40,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:40,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:40,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:40,674 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:25:40,687 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 17:25:40,725 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 17:25:40,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:40,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:40,781 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:40,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:40,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-12-31 17:25:40,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-12-31 17:25:40,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-12-31 17:25:40,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2018-12-31 17:25:40,800 INFO L87 Difference]: Start difference. First operand 668 states and 1470 transitions. Second operand 31 states. [2018-12-31 17:25:41,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:41,590 INFO L93 Difference]: Finished difference Result 1218 states and 2619 transitions. [2018-12-31 17:25:41,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-12-31 17:25:41,592 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 121 [2018-12-31 17:25:41,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:41,594 INFO L225 Difference]: With dead ends: 1218 [2018-12-31 17:25:41,594 INFO L226 Difference]: Without dead ends: 1087 [2018-12-31 17:25:41,595 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1004, Invalid=2302, Unknown=0, NotChecked=0, Total=3306 [2018-12-31 17:25:41,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2018-12-31 17:25:41,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 1087. [2018-12-31 17:25:41,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1087 states. [2018-12-31 17:25:41,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 2308 transitions. [2018-12-31 17:25:41,611 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 2308 transitions. Word has length 121 [2018-12-31 17:25:41,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:41,611 INFO L480 AbstractCegarLoop]: Abstraction has 1087 states and 2308 transitions. [2018-12-31 17:25:41,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-12-31 17:25:41,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 2308 transitions. [2018-12-31 17:25:41,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-12-31 17:25:41,613 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:41,613 INFO L402 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 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 17:25:41,613 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:41,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:41,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1469190649, now seen corresponding path program 47 times [2018-12-31 17:25:41,619 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:41,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:41,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:41,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:41,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:42,129 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:42,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:42,129 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:25:42,143 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 17:25:42,189 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-12-31 17:25:42,189 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:42,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:42,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:42,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-12-31 17:25:42,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-12-31 17:25:42,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-12-31 17:25:42,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2018-12-31 17:25:42,276 INFO L87 Difference]: Start difference. First operand 1087 states and 2308 transitions. Second operand 32 states. [2018-12-31 17:25:43,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:43,233 INFO L93 Difference]: Finished difference Result 1234 states and 2651 transitions. [2018-12-31 17:25:43,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-12-31 17:25:43,235 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 125 [2018-12-31 17:25:43,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:43,237 INFO L225 Difference]: With dead ends: 1234 [2018-12-31 17:25:43,237 INFO L226 Difference]: Without dead ends: 1103 [2018-12-31 17:25:43,238 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1075, Invalid=2465, Unknown=0, NotChecked=0, Total=3540 [2018-12-31 17:25:43,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2018-12-31 17:25:43,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 684. [2018-12-31 17:25:43,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 684 states. [2018-12-31 17:25:43,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1502 transitions. [2018-12-31 17:25:43,249 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1502 transitions. Word has length 125 [2018-12-31 17:25:43,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:43,249 INFO L480 AbstractCegarLoop]: Abstraction has 684 states and 1502 transitions. [2018-12-31 17:25:43,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-12-31 17:25:43,249 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1502 transitions. [2018-12-31 17:25:43,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-12-31 17:25:43,255 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:43,255 INFO L402 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 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 17:25:43,255 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:43,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:43,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1066069549, now seen corresponding path program 48 times [2018-12-31 17:25:43,256 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:43,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:43,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:43,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:43,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:43,896 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:43,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:43,896 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:25:43,909 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 17:25:43,961 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-12-31 17:25:43,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:43,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:44,056 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:44,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:44,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-12-31 17:25:44,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-12-31 17:25:44,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-12-31 17:25:44,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2018-12-31 17:25:44,079 INFO L87 Difference]: Start difference. First operand 684 states and 1502 transitions. Second operand 32 states. [2018-12-31 17:25:44,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:44,847 INFO L93 Difference]: Finished difference Result 1250 states and 2683 transitions. [2018-12-31 17:25:44,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-12-31 17:25:44,848 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 125 [2018-12-31 17:25:44,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:44,850 INFO L225 Difference]: With dead ends: 1250 [2018-12-31 17:25:44,850 INFO L226 Difference]: Without dead ends: 1119 [2018-12-31 17:25:44,851 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=998, Invalid=2542, Unknown=0, NotChecked=0, Total=3540 [2018-12-31 17:25:44,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2018-12-31 17:25:44,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1119. [2018-12-31 17:25:44,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1119 states. [2018-12-31 17:25:44,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 2372 transitions. [2018-12-31 17:25:44,863 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 2372 transitions. Word has length 125 [2018-12-31 17:25:44,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:44,863 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 2372 transitions. [2018-12-31 17:25:44,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-12-31 17:25:44,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 2372 transitions. [2018-12-31 17:25:44,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-12-31 17:25:44,865 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:44,865 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 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 17:25:44,865 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:44,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:44,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1870664266, now seen corresponding path program 49 times [2018-12-31 17:25:44,866 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:44,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:44,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:44,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:44,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:45,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:45,297 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:25:45,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:25:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:45,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:45,424 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:45,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-12-31 17:25:45,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-12-31 17:25:45,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-12-31 17:25:45,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2018-12-31 17:25:45,426 INFO L87 Difference]: Start difference. First operand 1119 states and 2372 transitions. Second operand 33 states. [2018-12-31 17:25:46,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:46,256 INFO L93 Difference]: Finished difference Result 1266 states and 2715 transitions. [2018-12-31 17:25:46,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-12-31 17:25:46,257 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 129 [2018-12-31 17:25:46,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:46,260 INFO L225 Difference]: With dead ends: 1266 [2018-12-31 17:25:46,260 INFO L226 Difference]: Without dead ends: 1135 [2018-12-31 17:25:46,261 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1175, Invalid=2607, Unknown=0, NotChecked=0, Total=3782 [2018-12-31 17:25:46,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2018-12-31 17:25:46,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 700. [2018-12-31 17:25:46,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2018-12-31 17:25:46,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1534 transitions. [2018-12-31 17:25:46,269 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1534 transitions. Word has length 129 [2018-12-31 17:25:46,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:46,270 INFO L480 AbstractCegarLoop]: Abstraction has 700 states and 1534 transitions. [2018-12-31 17:25:46,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-12-31 17:25:46,270 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1534 transitions. [2018-12-31 17:25:46,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-12-31 17:25:46,271 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:46,271 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 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 17:25:46,272 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:46,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:46,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1817179318, now seen corresponding path program 50 times [2018-12-31 17:25:46,272 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:46,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:46,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:46,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:25:46,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:46,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:46,866 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:25:46,879 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 17:25:46,916 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 17:25:46,917 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:46,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:47,010 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:47,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-12-31 17:25:47,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-12-31 17:25:47,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-12-31 17:25:47,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2018-12-31 17:25:47,011 INFO L87 Difference]: Start difference. First operand 700 states and 1534 transitions. Second operand 33 states. [2018-12-31 17:25:47,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:47,984 INFO L93 Difference]: Finished difference Result 1282 states and 2747 transitions. [2018-12-31 17:25:47,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-12-31 17:25:47,986 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 129 [2018-12-31 17:25:47,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:47,988 INFO L225 Difference]: With dead ends: 1282 [2018-12-31 17:25:47,988 INFO L226 Difference]: Without dead ends: 1151 [2018-12-31 17:25:47,988 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1150, Invalid=2632, Unknown=0, NotChecked=0, Total=3782 [2018-12-31 17:25:47,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2018-12-31 17:25:47,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 1151. [2018-12-31 17:25:47,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1151 states. [2018-12-31 17:25:48,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 2436 transitions. [2018-12-31 17:25:48,001 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 2436 transitions. Word has length 129 [2018-12-31 17:25:48,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:48,001 INFO L480 AbstractCegarLoop]: Abstraction has 1151 states and 2436 transitions. [2018-12-31 17:25:48,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-12-31 17:25:48,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 2436 transitions. [2018-12-31 17:25:48,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-12-31 17:25:48,003 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:48,003 INFO L402 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 13, 13, 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 17:25:48,003 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:48,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:48,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1106519833, now seen corresponding path program 51 times [2018-12-31 17:25:48,004 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:48,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:48,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:48,005 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:48,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:48,533 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:48,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:48,534 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:25:48,546 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 17:25:48,598 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-12-31 17:25:48,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:48,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:48,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:48,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-12-31 17:25:48,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-12-31 17:25:48,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-12-31 17:25:48,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=858, Unknown=0, NotChecked=0, Total=1122 [2018-12-31 17:25:48,719 INFO L87 Difference]: Start difference. First operand 1151 states and 2436 transitions. Second operand 34 states. [2018-12-31 17:25:49,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:49,584 INFO L93 Difference]: Finished difference Result 1298 states and 2779 transitions. [2018-12-31 17:25:49,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-12-31 17:25:49,586 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 133 [2018-12-31 17:25:49,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:49,588 INFO L225 Difference]: With dead ends: 1298 [2018-12-31 17:25:49,588 INFO L226 Difference]: Without dead ends: 1167 [2018-12-31 17:25:49,589 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1226, Invalid=2806, Unknown=0, NotChecked=0, Total=4032 [2018-12-31 17:25:49,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2018-12-31 17:25:49,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 716. [2018-12-31 17:25:49,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 716 states. [2018-12-31 17:25:49,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1566 transitions. [2018-12-31 17:25:49,598 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1566 transitions. Word has length 133 [2018-12-31 17:25:49,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:49,598 INFO L480 AbstractCegarLoop]: Abstraction has 716 states and 1566 transitions. [2018-12-31 17:25:49,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-12-31 17:25:49,599 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1566 transitions. [2018-12-31 17:25:49,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-12-31 17:25:49,600 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:49,600 INFO L402 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 13, 13, 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 17:25:49,600 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:49,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:49,601 INFO L82 PathProgramCache]: Analyzing trace with hash -2044996083, now seen corresponding path program 52 times [2018-12-31 17:25:49,601 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:49,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:49,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:49,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:49,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:50,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:50,039 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:25:50,052 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 17:25:50,094 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 17:25:50,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:50,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:50,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:50,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-12-31 17:25:50,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-12-31 17:25:50,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-12-31 17:25:50,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=858, Unknown=0, NotChecked=0, Total=1122 [2018-12-31 17:25:50,394 INFO L87 Difference]: Start difference. First operand 716 states and 1566 transitions. Second operand 34 states. [2018-12-31 17:25:51,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:51,287 INFO L93 Difference]: Finished difference Result 1314 states and 2811 transitions. [2018-12-31 17:25:51,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-12-31 17:25:51,288 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 133 [2018-12-31 17:25:51,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:51,290 INFO L225 Difference]: With dead ends: 1314 [2018-12-31 17:25:51,290 INFO L226 Difference]: Without dead ends: 1183 [2018-12-31 17:25:51,291 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1194, Invalid=2712, Unknown=0, NotChecked=0, Total=3906 [2018-12-31 17:25:51,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2018-12-31 17:25:51,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 1183. [2018-12-31 17:25:51,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1183 states. [2018-12-31 17:25:51,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 2500 transitions. [2018-12-31 17:25:51,305 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 2500 transitions. Word has length 133 [2018-12-31 17:25:51,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:51,305 INFO L480 AbstractCegarLoop]: Abstraction has 1183 states and 2500 transitions. [2018-12-31 17:25:51,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-12-31 17:25:51,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 2500 transitions. [2018-12-31 17:25:51,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-12-31 17:25:51,307 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:51,307 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 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 17:25:51,307 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:51,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:51,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1550683434, now seen corresponding path program 53 times [2018-12-31 17:25:51,308 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:51,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:51,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:51,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:51,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:51,769 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:51,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:51,770 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:25:51,783 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 17:25:51,838 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2018-12-31 17:25:51,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:51,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:51,949 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:51,967 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:51,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-12-31 17:25:51,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-12-31 17:25:51,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-12-31 17:25:51,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2018-12-31 17:25:51,968 INFO L87 Difference]: Start difference. First operand 1183 states and 2500 transitions. Second operand 35 states. [2018-12-31 17:25:53,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:53,015 INFO L93 Difference]: Finished difference Result 1330 states and 2843 transitions. [2018-12-31 17:25:53,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-12-31 17:25:53,017 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 137 [2018-12-31 17:25:53,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:53,019 INFO L225 Difference]: With dead ends: 1330 [2018-12-31 17:25:53,019 INFO L226 Difference]: Without dead ends: 1199 [2018-12-31 17:25:53,020 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1333, Invalid=2957, Unknown=0, NotChecked=0, Total=4290 [2018-12-31 17:25:53,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2018-12-31 17:25:53,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 732. [2018-12-31 17:25:53,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 732 states. [2018-12-31 17:25:53,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1598 transitions. [2018-12-31 17:25:53,030 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1598 transitions. Word has length 137 [2018-12-31 17:25:53,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:53,030 INFO L480 AbstractCegarLoop]: Abstraction has 732 states and 1598 transitions. [2018-12-31 17:25:53,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-12-31 17:25:53,030 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1598 transitions. [2018-12-31 17:25:53,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-12-31 17:25:53,031 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:53,032 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 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 17:25:53,032 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:53,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:53,032 INFO L82 PathProgramCache]: Analyzing trace with hash -708181206, now seen corresponding path program 54 times [2018-12-31 17:25:53,032 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:53,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:53,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:53,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:53,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:53,477 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:53,477 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:53,477 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:25:53,491 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 17:25:53,542 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-12-31 17:25:53,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:53,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:53,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:53,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-12-31 17:25:53,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-12-31 17:25:53,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-12-31 17:25:53,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2018-12-31 17:25:53,677 INFO L87 Difference]: Start difference. First operand 732 states and 1598 transitions. Second operand 35 states. [2018-12-31 17:25:54,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:54,616 INFO L93 Difference]: Finished difference Result 1346 states and 2875 transitions. [2018-12-31 17:25:54,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-12-31 17:25:54,618 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 137 [2018-12-31 17:25:54,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:54,621 INFO L225 Difference]: With dead ends: 1346 [2018-12-31 17:25:54,621 INFO L226 Difference]: Without dead ends: 1215 [2018-12-31 17:25:54,622 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1306, Invalid=2984, Unknown=0, NotChecked=0, Total=4290 [2018-12-31 17:25:54,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2018-12-31 17:25:54,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1215. [2018-12-31 17:25:54,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1215 states. [2018-12-31 17:25:54,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 2564 transitions. [2018-12-31 17:25:54,634 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 2564 transitions. Word has length 137 [2018-12-31 17:25:54,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:54,634 INFO L480 AbstractCegarLoop]: Abstraction has 1215 states and 2564 transitions. [2018-12-31 17:25:54,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-12-31 17:25:54,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 2564 transitions. [2018-12-31 17:25:54,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-12-31 17:25:54,637 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:54,637 INFO L402 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 14, 14, 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 17:25:54,637 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:54,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:54,637 INFO L82 PathProgramCache]: Analyzing trace with hash 805364679, now seen corresponding path program 55 times [2018-12-31 17:25:54,637 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:54,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:54,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:54,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:54,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:54,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:55,124 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:55,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:55,124 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:25:55,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:25:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:55,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:55,255 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:55,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-12-31 17:25:55,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-31 17:25:55,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-31 17:25:55,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=963, Unknown=0, NotChecked=0, Total=1260 [2018-12-31 17:25:55,256 INFO L87 Difference]: Start difference. First operand 1215 states and 2564 transitions. Second operand 36 states. [2018-12-31 17:25:56,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:56,310 INFO L93 Difference]: Finished difference Result 1362 states and 2907 transitions. [2018-12-31 17:25:56,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-12-31 17:25:56,311 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 141 [2018-12-31 17:25:56,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:56,313 INFO L225 Difference]: With dead ends: 1362 [2018-12-31 17:25:56,313 INFO L226 Difference]: Without dead ends: 1231 [2018-12-31 17:25:56,314 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1387, Invalid=3169, Unknown=0, NotChecked=0, Total=4556 [2018-12-31 17:25:56,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2018-12-31 17:25:56,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 748. [2018-12-31 17:25:56,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2018-12-31 17:25:56,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1630 transitions. [2018-12-31 17:25:56,326 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1630 transitions. Word has length 141 [2018-12-31 17:25:56,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:56,326 INFO L480 AbstractCegarLoop]: Abstraction has 748 states and 1630 transitions. [2018-12-31 17:25:56,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-31 17:25:56,326 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1630 transitions. [2018-12-31 17:25:56,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-12-31 17:25:56,327 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:56,328 INFO L402 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 14, 14, 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 17:25:56,328 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:56,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:56,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1195975187, now seen corresponding path program 56 times [2018-12-31 17:25:56,328 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:56,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:56,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:56,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:25:56,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:56,858 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:56,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:56,859 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:25:56,875 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 17:25:56,919 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 17:25:56,919 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:56,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:57,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:57,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-12-31 17:25:57,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-31 17:25:57,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-31 17:25:57,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=963, Unknown=0, NotChecked=0, Total=1260 [2018-12-31 17:25:57,512 INFO L87 Difference]: Start difference. First operand 748 states and 1630 transitions. Second operand 36 states. [2018-12-31 17:25:58,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:25:58,549 INFO L93 Difference]: Finished difference Result 1378 states and 2939 transitions. [2018-12-31 17:25:58,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-12-31 17:25:58,551 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 141 [2018-12-31 17:25:58,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:25:58,553 INFO L225 Difference]: With dead ends: 1378 [2018-12-31 17:25:58,553 INFO L226 Difference]: Without dead ends: 1247 [2018-12-31 17:25:58,554 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1283, Invalid=3273, Unknown=0, NotChecked=0, Total=4556 [2018-12-31 17:25:58,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2018-12-31 17:25:58,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1247. [2018-12-31 17:25:58,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1247 states. [2018-12-31 17:25:58,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 2628 transitions. [2018-12-31 17:25:58,569 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 2628 transitions. Word has length 141 [2018-12-31 17:25:58,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:25:58,569 INFO L480 AbstractCegarLoop]: Abstraction has 1247 states and 2628 transitions. [2018-12-31 17:25:58,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-31 17:25:58,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 2628 transitions. [2018-12-31 17:25:58,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-12-31 17:25:58,571 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:25:58,572 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 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 17:25:58,572 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:25:58,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:25:58,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1696737290, now seen corresponding path program 57 times [2018-12-31 17:25:58,572 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:25:58,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:25:58,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:58,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:25:58,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:25:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:25:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:59,084 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:25:59,084 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:25:59,098 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 17:25:59,158 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-12-31 17:25:59,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:25:59,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:25:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:25:59,431 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:25:59,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-12-31 17:25:59,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-12-31 17:25:59,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-12-31 17:25:59,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1018, Unknown=0, NotChecked=0, Total=1332 [2018-12-31 17:25:59,433 INFO L87 Difference]: Start difference. First operand 1247 states and 2628 transitions. Second operand 37 states. [2018-12-31 17:26:00,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:26:00,411 INFO L93 Difference]: Finished difference Result 1394 states and 2971 transitions. [2018-12-31 17:26:00,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-12-31 17:26:00,413 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 145 [2018-12-31 17:26:00,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:26:00,416 INFO L225 Difference]: With dead ends: 1394 [2018-12-31 17:26:00,416 INFO L226 Difference]: Without dead ends: 1263 [2018-12-31 17:26:00,417 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1350, Invalid=3480, Unknown=0, NotChecked=0, Total=4830 [2018-12-31 17:26:00,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2018-12-31 17:26:00,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 764. [2018-12-31 17:26:00,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 764 states. [2018-12-31 17:26:00,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1662 transitions. [2018-12-31 17:26:00,433 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1662 transitions. Word has length 145 [2018-12-31 17:26:00,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:26:00,433 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 1662 transitions. [2018-12-31 17:26:00,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-12-31 17:26:00,436 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1662 transitions. [2018-12-31 17:26:00,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-12-31 17:26:00,437 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:26:00,437 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 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 17:26:00,438 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:26:00,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:26:00,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1310844150, now seen corresponding path program 58 times [2018-12-31 17:26:00,438 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:26:00,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:26:00,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:00,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:26:00,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:26:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:01,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:26:01,515 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:26:01,529 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 17:26:01,576 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 17:26:01,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:26:01,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:26:01,649 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:01,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:26:01,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-12-31 17:26:01,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-12-31 17:26:01,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-12-31 17:26:01,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1018, Unknown=0, NotChecked=0, Total=1332 [2018-12-31 17:26:01,670 INFO L87 Difference]: Start difference. First operand 764 states and 1662 transitions. Second operand 37 states. [2018-12-31 17:26:03,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:26:03,056 INFO L93 Difference]: Finished difference Result 1410 states and 3003 transitions. [2018-12-31 17:26:03,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-12-31 17:26:03,057 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 145 [2018-12-31 17:26:03,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:26:03,059 INFO L225 Difference]: With dead ends: 1410 [2018-12-31 17:26:03,060 INFO L226 Difference]: Without dead ends: 1279 [2018-12-31 17:26:03,061 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1472, Invalid=3358, Unknown=0, NotChecked=0, Total=4830 [2018-12-31 17:26:03,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2018-12-31 17:26:03,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1279. [2018-12-31 17:26:03,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1279 states. [2018-12-31 17:26:03,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 2692 transitions. [2018-12-31 17:26:03,074 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 2692 transitions. Word has length 145 [2018-12-31 17:26:03,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:26:03,075 INFO L480 AbstractCegarLoop]: Abstraction has 1279 states and 2692 transitions. [2018-12-31 17:26:03,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-12-31 17:26:03,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 2692 transitions. [2018-12-31 17:26:03,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-12-31 17:26:03,077 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:26:03,077 INFO L402 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 15, 15, 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 17:26:03,078 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:26:03,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:26:03,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1160580775, now seen corresponding path program 59 times [2018-12-31 17:26:03,078 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:26:03,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:26:03,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:03,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:26:03,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:26:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:03,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:26:03,562 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:26:03,574 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 17:26:03,712 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-12-31 17:26:03,712 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:26:03,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:26:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:03,905 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:26:03,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-12-31 17:26:03,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-12-31 17:26:03,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-12-31 17:26:03,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2018-12-31 17:26:03,907 INFO L87 Difference]: Start difference. First operand 1279 states and 2692 transitions. Second operand 38 states. [2018-12-31 17:26:04,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:26:04,991 INFO L93 Difference]: Finished difference Result 1426 states and 3035 transitions. [2018-12-31 17:26:04,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-12-31 17:26:04,992 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 149 [2018-12-31 17:26:04,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:26:04,995 INFO L225 Difference]: With dead ends: 1426 [2018-12-31 17:26:04,995 INFO L226 Difference]: Without dead ends: 1295 [2018-12-31 17:26:04,996 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1558, Invalid=3554, Unknown=0, NotChecked=0, Total=5112 [2018-12-31 17:26:04,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2018-12-31 17:26:05,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 780. [2018-12-31 17:26:05,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2018-12-31 17:26:05,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1694 transitions. [2018-12-31 17:26:05,010 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1694 transitions. Word has length 149 [2018-12-31 17:26:05,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:26:05,010 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 1694 transitions. [2018-12-31 17:26:05,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-12-31 17:26:05,010 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1694 transitions. [2018-12-31 17:26:05,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-12-31 17:26:05,011 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:26:05,012 INFO L402 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 15, 15, 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 17:26:05,012 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:26:05,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:26:05,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1153694259, now seen corresponding path program 60 times [2018-12-31 17:26:05,012 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:26:05,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:26:05,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:05,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:26:05,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:26:05,529 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:05,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:26:05,529 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:26:05,543 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 17:26:05,603 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-12-31 17:26:05,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:26:05,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:26:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:05,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:26:05,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-12-31 17:26:05,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-12-31 17:26:05,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-12-31 17:26:05,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2018-12-31 17:26:05,694 INFO L87 Difference]: Start difference. First operand 780 states and 1694 transitions. Second operand 38 states. [2018-12-31 17:26:06,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:26:06,751 INFO L93 Difference]: Finished difference Result 1442 states and 3067 transitions. [2018-12-31 17:26:06,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-12-31 17:26:06,753 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 149 [2018-12-31 17:26:06,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:26:06,755 INFO L225 Difference]: With dead ends: 1442 [2018-12-31 17:26:06,756 INFO L226 Difference]: Without dead ends: 1311 [2018-12-31 17:26:06,756 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1439, Invalid=3673, Unknown=0, NotChecked=0, Total=5112 [2018-12-31 17:26:06,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2018-12-31 17:26:06,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1311. [2018-12-31 17:26:06,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1311 states. [2018-12-31 17:26:06,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 2756 transitions. [2018-12-31 17:26:06,776 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 2756 transitions. Word has length 149 [2018-12-31 17:26:06,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:26:06,777 INFO L480 AbstractCegarLoop]: Abstraction has 1311 states and 2756 transitions. [2018-12-31 17:26:06,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-12-31 17:26:06,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 2756 transitions. [2018-12-31 17:26:06,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-12-31 17:26:06,784 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:26:06,785 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 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 17:26:06,785 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:26:06,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:26:06,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1618862826, now seen corresponding path program 61 times [2018-12-31 17:26:06,785 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:26:06,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:26:06,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:06,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:26:06,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:26:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:07,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:26:07,808 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:26:07,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:26:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:26:07,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:26:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:07,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:26:07,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2018-12-31 17:26:07,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-12-31 17:26:07,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-12-31 17:26:07,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1132, Unknown=0, NotChecked=0, Total=1482 [2018-12-31 17:26:07,963 INFO L87 Difference]: Start difference. First operand 1311 states and 2756 transitions. Second operand 39 states. [2018-12-31 17:26:09,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:26:09,094 INFO L93 Difference]: Finished difference Result 1458 states and 3099 transitions. [2018-12-31 17:26:09,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-12-31 17:26:09,095 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 153 [2018-12-31 17:26:09,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:26:09,098 INFO L225 Difference]: With dead ends: 1458 [2018-12-31 17:26:09,098 INFO L226 Difference]: Without dead ends: 1327 [2018-12-31 17:26:09,099 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1679, Invalid=3723, Unknown=0, NotChecked=0, Total=5402 [2018-12-31 17:26:09,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2018-12-31 17:26:09,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 796. [2018-12-31 17:26:09,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2018-12-31 17:26:09,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1726 transitions. [2018-12-31 17:26:09,110 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1726 transitions. Word has length 153 [2018-12-31 17:26:09,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:26:09,110 INFO L480 AbstractCegarLoop]: Abstraction has 796 states and 1726 transitions. [2018-12-31 17:26:09,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-12-31 17:26:09,110 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1726 transitions. [2018-12-31 17:26:09,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-12-31 17:26:09,112 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:26:09,112 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 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 17:26:09,112 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:26:09,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:26:09,112 INFO L82 PathProgramCache]: Analyzing trace with hash 466375402, now seen corresponding path program 62 times [2018-12-31 17:26:09,113 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:26:09,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:26:09,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:09,114 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:26:09,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:26:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:09,748 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:26:09,748 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:26:09,766 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 17:26:09,812 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 17:26:09,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:26:09,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:26:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:09,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:26:09,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2018-12-31 17:26:09,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-12-31 17:26:09,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-12-31 17:26:09,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1132, Unknown=0, NotChecked=0, Total=1482 [2018-12-31 17:26:09,930 INFO L87 Difference]: Start difference. First operand 796 states and 1726 transitions. Second operand 39 states. [2018-12-31 17:26:11,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:26:11,077 INFO L93 Difference]: Finished difference Result 1474 states and 3131 transitions. [2018-12-31 17:26:11,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-12-31 17:26:11,079 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 153 [2018-12-31 17:26:11,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:26:11,082 INFO L225 Difference]: With dead ends: 1474 [2018-12-31 17:26:11,082 INFO L226 Difference]: Without dead ends: 1343 [2018-12-31 17:26:11,083 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1648, Invalid=3754, Unknown=0, NotChecked=0, Total=5402 [2018-12-31 17:26:11,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2018-12-31 17:26:11,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1343. [2018-12-31 17:26:11,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1343 states. [2018-12-31 17:26:11,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 2820 transitions. [2018-12-31 17:26:11,097 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 2820 transitions. Word has length 153 [2018-12-31 17:26:11,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:26:11,097 INFO L480 AbstractCegarLoop]: Abstraction has 1343 states and 2820 transitions. [2018-12-31 17:26:11,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-12-31 17:26:11,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 2820 transitions. [2018-12-31 17:26:11,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-12-31 17:26:11,102 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:26:11,103 INFO L402 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 16, 16, 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 17:26:11,103 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:26:11,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:26:11,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1685084551, now seen corresponding path program 63 times [2018-12-31 17:26:11,103 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:26:11,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:26:11,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:11,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:26:11,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:26:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 1057 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:11,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:26:11,694 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:26:11,708 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 17:26:11,767 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-12-31 17:26:11,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:26:11,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:26:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 1057 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:11,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:26:11,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-12-31 17:26:11,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-12-31 17:26:11,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-12-31 17:26:11,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2018-12-31 17:26:11,839 INFO L87 Difference]: Start difference. First operand 1343 states and 2820 transitions. Second operand 40 states. [2018-12-31 17:26:13,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:26:13,137 INFO L93 Difference]: Finished difference Result 1490 states and 3163 transitions. [2018-12-31 17:26:13,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-12-31 17:26:13,139 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 157 [2018-12-31 17:26:13,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:26:13,141 INFO L225 Difference]: With dead ends: 1490 [2018-12-31 17:26:13,141 INFO L226 Difference]: Without dead ends: 1359 [2018-12-31 17:26:13,142 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1739, Invalid=3961, Unknown=0, NotChecked=0, Total=5700 [2018-12-31 17:26:13,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2018-12-31 17:26:13,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 812. [2018-12-31 17:26:13,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2018-12-31 17:26:13,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1758 transitions. [2018-12-31 17:26:13,153 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1758 transitions. Word has length 157 [2018-12-31 17:26:13,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:26:13,153 INFO L480 AbstractCegarLoop]: Abstraction has 812 states and 1758 transitions. [2018-12-31 17:26:13,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-12-31 17:26:13,153 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1758 transitions. [2018-12-31 17:26:13,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-12-31 17:26:13,155 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:26:13,155 INFO L402 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 16, 16, 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 17:26:13,155 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:26:13,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:26:13,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1853141587, now seen corresponding path program 64 times [2018-12-31 17:26:13,156 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:26:13,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:26:13,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:13,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:26:13,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:26:13,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 1057 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:13,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:26:13,736 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:26:13,749 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 17:26:13,799 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 17:26:13,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:26:13,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:26:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 1057 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:13,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:26:13,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-12-31 17:26:13,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-12-31 17:26:13,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-12-31 17:26:13,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2018-12-31 17:26:13,888 INFO L87 Difference]: Start difference. First operand 812 states and 1758 transitions. Second operand 40 states. [2018-12-31 17:26:15,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:26:15,119 INFO L93 Difference]: Finished difference Result 1506 states and 3195 transitions. [2018-12-31 17:26:15,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-12-31 17:26:15,122 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 157 [2018-12-31 17:26:15,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:26:15,124 INFO L225 Difference]: With dead ends: 1506 [2018-12-31 17:26:15,124 INFO L226 Difference]: Without dead ends: 1375 [2018-12-31 17:26:15,125 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1701, Invalid=3849, Unknown=0, NotChecked=0, Total=5550 [2018-12-31 17:26:15,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2018-12-31 17:26:15,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1375. [2018-12-31 17:26:15,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1375 states. [2018-12-31 17:26:15,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 2884 transitions. [2018-12-31 17:26:15,139 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 2884 transitions. Word has length 157 [2018-12-31 17:26:15,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:26:15,139 INFO L480 AbstractCegarLoop]: Abstraction has 1375 states and 2884 transitions. [2018-12-31 17:26:15,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-12-31 17:26:15,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 2884 transitions. [2018-12-31 17:26:15,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-12-31 17:26:15,142 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:26:15,142 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 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 17:26:15,142 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:26:15,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:26:15,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1163967946, now seen corresponding path program 65 times [2018-12-31 17:26:15,143 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:26:15,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:26:15,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:15,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:26:15,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:15,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:26:15,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:15,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:26:15,777 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:26:15,790 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 17:26:15,847 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-12-31 17:26:15,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:26:15,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:26:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:15,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:26:15,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-12-31 17:26:15,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-12-31 17:26:15,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-12-31 17:26:15,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1252, Unknown=0, NotChecked=0, Total=1640 [2018-12-31 17:26:15,951 INFO L87 Difference]: Start difference. First operand 1375 states and 2884 transitions. Second operand 41 states. [2018-12-31 17:26:17,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:26:17,197 INFO L93 Difference]: Finished difference Result 1522 states and 3227 transitions. [2018-12-31 17:26:17,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-12-31 17:26:17,199 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 161 [2018-12-31 17:26:17,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:26:17,201 INFO L225 Difference]: With dead ends: 1522 [2018-12-31 17:26:17,201 INFO L226 Difference]: Without dead ends: 1391 [2018-12-31 17:26:17,202 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1867, Invalid=4139, Unknown=0, NotChecked=0, Total=6006 [2018-12-31 17:26:17,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2018-12-31 17:26:17,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 828. [2018-12-31 17:26:17,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2018-12-31 17:26:17,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1790 transitions. [2018-12-31 17:26:17,214 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1790 transitions. Word has length 161 [2018-12-31 17:26:17,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:26:17,214 INFO L480 AbstractCegarLoop]: Abstraction has 828 states and 1790 transitions. [2018-12-31 17:26:17,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-12-31 17:26:17,214 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1790 transitions. [2018-12-31 17:26:17,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-12-31 17:26:17,216 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:26:17,216 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 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 17:26:17,216 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:26:17,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:26:17,217 INFO L82 PathProgramCache]: Analyzing trace with hash 661957322, now seen corresponding path program 66 times [2018-12-31 17:26:17,217 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:26:17,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:26:17,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:17,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:26:17,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:26:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:18,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:26:18,039 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:26:18,063 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 17:26:18,183 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-12-31 17:26:18,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:26:18,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:26:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:18,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:26:18,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-12-31 17:26:18,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-12-31 17:26:18,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-12-31 17:26:18,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1252, Unknown=0, NotChecked=0, Total=1640 [2018-12-31 17:26:18,261 INFO L87 Difference]: Start difference. First operand 828 states and 1790 transitions. Second operand 41 states. [2018-12-31 17:26:19,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:26:19,580 INFO L93 Difference]: Finished difference Result 1538 states and 3259 transitions. [2018-12-31 17:26:19,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-12-31 17:26:19,582 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 161 [2018-12-31 17:26:19,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:26:19,585 INFO L225 Difference]: With dead ends: 1538 [2018-12-31 17:26:19,585 INFO L226 Difference]: Without dead ends: 1407 [2018-12-31 17:26:19,586 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1834, Invalid=4172, Unknown=0, NotChecked=0, Total=6006 [2018-12-31 17:26:19,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2018-12-31 17:26:19,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1407. [2018-12-31 17:26:19,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1407 states. [2018-12-31 17:26:19,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 2948 transitions. [2018-12-31 17:26:19,600 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 2948 transitions. Word has length 161 [2018-12-31 17:26:19,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:26:19,600 INFO L480 AbstractCegarLoop]: Abstraction has 1407 states and 2948 transitions. [2018-12-31 17:26:19,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-12-31 17:26:19,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 2948 transitions. [2018-12-31 17:26:19,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-12-31 17:26:19,602 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:26:19,603 INFO L402 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 17, 17, 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 17:26:19,603 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:26:19,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:26:19,603 INFO L82 PathProgramCache]: Analyzing trace with hash 346735719, now seen corresponding path program 67 times [2018-12-31 17:26:19,603 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:26:19,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:26:19,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:19,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:26:19,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:26:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 0 proven. 1191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:20,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:26:20,156 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:26:20,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:26:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:26:20,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:26:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 0 proven. 1191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:20,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:26:20,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-12-31 17:26:20,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-12-31 17:26:20,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-12-31 17:26:20,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2018-12-31 17:26:20,309 INFO L87 Difference]: Start difference. First operand 1407 states and 2948 transitions. Second operand 42 states. [2018-12-31 17:26:21,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:26:21,586 INFO L93 Difference]: Finished difference Result 1554 states and 3291 transitions. [2018-12-31 17:26:21,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-12-31 17:26:21,588 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 165 [2018-12-31 17:26:21,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:26:21,590 INFO L225 Difference]: With dead ends: 1554 [2018-12-31 17:26:21,590 INFO L226 Difference]: Without dead ends: 1423 [2018-12-31 17:26:21,591 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1930, Invalid=4390, Unknown=0, NotChecked=0, Total=6320 [2018-12-31 17:26:21,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2018-12-31 17:26:21,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 844. [2018-12-31 17:26:21,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2018-12-31 17:26:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1822 transitions. [2018-12-31 17:26:21,603 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1822 transitions. Word has length 165 [2018-12-31 17:26:21,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:26:21,603 INFO L480 AbstractCegarLoop]: Abstraction has 844 states and 1822 transitions. [2018-12-31 17:26:21,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-12-31 17:26:21,604 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1822 transitions. [2018-12-31 17:26:21,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-12-31 17:26:21,605 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:26:21,605 INFO L402 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 17, 17, 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 17:26:21,605 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:26:21,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:26:21,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1602532749, now seen corresponding path program 68 times [2018-12-31 17:26:21,606 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:26:21,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:26:21,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:21,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:26:21,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:26:22,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 0 proven. 1191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:22,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:26:22,168 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:26:22,181 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 17:26:22,230 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 17:26:22,230 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:26:22,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:26:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 0 proven. 1191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:22,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:26:22,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-12-31 17:26:22,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-12-31 17:26:22,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-12-31 17:26:22,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2018-12-31 17:26:22,367 INFO L87 Difference]: Start difference. First operand 844 states and 1822 transitions. Second operand 42 states. [2018-12-31 17:26:23,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:26:23,800 INFO L93 Difference]: Finished difference Result 1570 states and 3323 transitions. [2018-12-31 17:26:23,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-12-31 17:26:23,802 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 165 [2018-12-31 17:26:23,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:26:23,805 INFO L225 Difference]: With dead ends: 1570 [2018-12-31 17:26:23,806 INFO L226 Difference]: Without dead ends: 1439 [2018-12-31 17:26:23,806 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1778, Invalid=4542, Unknown=0, NotChecked=0, Total=6320 [2018-12-31 17:26:23,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2018-12-31 17:26:23,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 1439. [2018-12-31 17:26:23,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1439 states. [2018-12-31 17:26:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 3012 transitions. [2018-12-31 17:26:23,820 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 3012 transitions. Word has length 165 [2018-12-31 17:26:23,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:26:23,821 INFO L480 AbstractCegarLoop]: Abstraction has 1439 states and 3012 transitions. [2018-12-31 17:26:23,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-12-31 17:26:23,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 3012 transitions. [2018-12-31 17:26:23,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-12-31 17:26:23,824 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:26:23,824 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 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 17:26:23,824 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:26:23,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:26:23,824 INFO L82 PathProgramCache]: Analyzing trace with hash 715831466, now seen corresponding path program 69 times [2018-12-31 17:26:23,825 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:26:23,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:26:23,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:23,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:26:23,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:26:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:24,422 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:26:24,422 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:26:24,445 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 17:26:24,565 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-12-31 17:26:24,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:26:24,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:26:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:24,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:26:24,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-12-31 17:26:24,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-12-31 17:26:24,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-12-31 17:26:24,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1378, Unknown=0, NotChecked=0, Total=1806 [2018-12-31 17:26:24,669 INFO L87 Difference]: Start difference. First operand 1439 states and 3012 transitions. Second operand 43 states. [2018-12-31 17:26:25,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:26:25,851 INFO L93 Difference]: Finished difference Result 1586 states and 3355 transitions. [2018-12-31 17:26:25,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-12-31 17:26:25,853 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 169 [2018-12-31 17:26:25,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:26:25,855 INFO L225 Difference]: With dead ends: 1586 [2018-12-31 17:26:25,856 INFO L226 Difference]: Without dead ends: 1455 [2018-12-31 17:26:25,857 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1857, Invalid=4785, Unknown=0, NotChecked=0, Total=6642 [2018-12-31 17:26:25,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2018-12-31 17:26:25,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 860. [2018-12-31 17:26:25,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2018-12-31 17:26:25,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1854 transitions. [2018-12-31 17:26:25,868 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1854 transitions. Word has length 169 [2018-12-31 17:26:25,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:26:25,868 INFO L480 AbstractCegarLoop]: Abstraction has 860 states and 1854 transitions. [2018-12-31 17:26:25,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-12-31 17:26:25,868 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1854 transitions. [2018-12-31 17:26:25,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-12-31 17:26:25,870 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:26:25,870 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 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 17:26:25,870 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:26:25,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:26:25,870 INFO L82 PathProgramCache]: Analyzing trace with hash 146219690, now seen corresponding path program 70 times [2018-12-31 17:26:25,871 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:26:25,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:26:25,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:25,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:26:25,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:26:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:26,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:26:26,462 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:26:26,490 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 17:26:26,536 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 17:26:26,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:26:26,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:26:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:26,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:26:26,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-12-31 17:26:26,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-12-31 17:26:26,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-12-31 17:26:26,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1378, Unknown=0, NotChecked=0, Total=1806 [2018-12-31 17:26:26,622 INFO L87 Difference]: Start difference. First operand 860 states and 1854 transitions. Second operand 43 states. [2018-12-31 17:26:28,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:26:28,246 INFO L93 Difference]: Finished difference Result 1602 states and 3387 transitions. [2018-12-31 17:26:28,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-12-31 17:26:28,248 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 169 [2018-12-31 17:26:28,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:26:28,251 INFO L225 Difference]: With dead ends: 1602 [2018-12-31 17:26:28,251 INFO L226 Difference]: Without dead ends: 1471 [2018-12-31 17:26:28,252 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2030, Invalid=4612, Unknown=0, NotChecked=0, Total=6642 [2018-12-31 17:26:28,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2018-12-31 17:26:28,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1471. [2018-12-31 17:26:28,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1471 states. [2018-12-31 17:26:28,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 3076 transitions. [2018-12-31 17:26:28,267 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 3076 transitions. Word has length 169 [2018-12-31 17:26:28,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:26:28,267 INFO L480 AbstractCegarLoop]: Abstraction has 1471 states and 3076 transitions. [2018-12-31 17:26:28,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-12-31 17:26:28,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 3076 transitions. [2018-12-31 17:26:28,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-12-31 17:26:28,270 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:26:28,270 INFO L402 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 18, 18, 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 17:26:28,270 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:26:28,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:26:28,270 INFO L82 PathProgramCache]: Analyzing trace with hash -54767801, now seen corresponding path program 71 times [2018-12-31 17:26:28,271 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:26:28,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:26:28,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:28,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:26:28,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:28,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:26:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 0 proven. 1333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:28,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:26:28,864 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:26:28,878 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 17:26:28,938 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-12-31 17:26:28,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:26:28,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:26:29,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 0 proven. 1333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:29,034 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:26:29,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-12-31 17:26:29,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-12-31 17:26:29,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-12-31 17:26:29,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2018-12-31 17:26:29,036 INFO L87 Difference]: Start difference. First operand 1471 states and 3076 transitions. Second operand 44 states. [2018-12-31 17:26:30,219 WARN L181 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2018-12-31 17:26:31,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:26:31,167 INFO L93 Difference]: Finished difference Result 1618 states and 3419 transitions. [2018-12-31 17:26:31,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-12-31 17:26:31,169 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 173 [2018-12-31 17:26:31,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:26:31,171 INFO L225 Difference]: With dead ends: 1618 [2018-12-31 17:26:31,172 INFO L226 Difference]: Without dead ends: 1487 [2018-12-31 17:26:31,173 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2131, Invalid=4841, Unknown=0, NotChecked=0, Total=6972 [2018-12-31 17:26:31,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2018-12-31 17:26:31,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 876. [2018-12-31 17:26:31,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 876 states. [2018-12-31 17:26:31,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1886 transitions. [2018-12-31 17:26:31,184 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1886 transitions. Word has length 173 [2018-12-31 17:26:31,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:26:31,184 INFO L480 AbstractCegarLoop]: Abstraction has 876 states and 1886 transitions. [2018-12-31 17:26:31,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-12-31 17:26:31,184 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1886 transitions. [2018-12-31 17:26:31,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-12-31 17:26:31,186 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:26:31,186 INFO L402 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 18, 18, 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 17:26:31,186 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:26:31,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:26:31,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1762147693, now seen corresponding path program 72 times [2018-12-31 17:26:31,187 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:26:31,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:26:31,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:31,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:26:31,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:31,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:26:31,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 0 proven. 1333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:31,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:26:31,838 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:26:31,852 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 17:26:31,920 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-12-31 17:26:31,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 17:26:31,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:26:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 0 proven. 1333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:31,998 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:26:31,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-12-31 17:26:31,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-12-31 17:26:31,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-12-31 17:26:31,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2018-12-31 17:26:31,999 INFO L87 Difference]: Start difference. First operand 876 states and 1886 transitions. Second operand 44 states. [2018-12-31 17:26:33,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:26:33,539 INFO L93 Difference]: Finished difference Result 1634 states and 3451 transitions. [2018-12-31 17:26:33,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-12-31 17:26:33,541 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 173 [2018-12-31 17:26:33,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:26:33,544 INFO L225 Difference]: With dead ends: 1634 [2018-12-31 17:26:33,544 INFO L226 Difference]: Without dead ends: 1503 [2018-12-31 17:26:33,545 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1961, Invalid=5011, Unknown=0, NotChecked=0, Total=6972 [2018-12-31 17:26:33,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2018-12-31 17:26:33,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 1503. [2018-12-31 17:26:33,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1503 states. [2018-12-31 17:26:33,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 3140 transitions. [2018-12-31 17:26:33,561 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 3140 transitions. Word has length 173 [2018-12-31 17:26:33,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:26:33,561 INFO L480 AbstractCegarLoop]: Abstraction has 1503 states and 3140 transitions. [2018-12-31 17:26:33,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-12-31 17:26:33,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 3140 transitions. [2018-12-31 17:26:33,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-12-31 17:26:33,564 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:26:33,564 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 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 17:26:33,565 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:26:33,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:26:33,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1195103114, now seen corresponding path program 73 times [2018-12-31 17:26:33,565 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:26:33,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:26:33,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:33,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 17:26:33,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:26:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:34,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 17:26:34,194 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 17:26:34,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:26:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 17:26:34,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 17:26:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 17:26:34,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 17:26:34,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2018-12-31 17:26:34,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-12-31 17:26:34,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-12-31 17:26:34,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1510, Unknown=0, NotChecked=0, Total=1980 [2018-12-31 17:26:34,356 INFO L87 Difference]: Start difference. First operand 1503 states and 3140 transitions. Second operand 45 states. [2018-12-31 17:26:35,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 17:26:35,834 INFO L93 Difference]: Finished difference Result 1650 states and 3483 transitions. [2018-12-31 17:26:35,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-12-31 17:26:35,836 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 177 [2018-12-31 17:26:35,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 17:26:35,838 INFO L225 Difference]: With dead ends: 1650 [2018-12-31 17:26:35,838 INFO L226 Difference]: Without dead ends: 1519 [2018-12-31 17:26:35,839 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2273, Invalid=5037, Unknown=0, NotChecked=0, Total=7310 [2018-12-31 17:26:35,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2018-12-31 17:26:35,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 892. [2018-12-31 17:26:35,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 892 states. [2018-12-31 17:26:35,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1918 transitions. [2018-12-31 17:26:35,850 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1918 transitions. Word has length 177 [2018-12-31 17:26:35,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 17:26:35,851 INFO L480 AbstractCegarLoop]: Abstraction has 892 states and 1918 transitions. [2018-12-31 17:26:35,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-12-31 17:26:35,851 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1918 transitions. [2018-12-31 17:26:35,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-12-31 17:26:35,853 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 17:26:35,853 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 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 17:26:35,853 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 17:26:35,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 17:26:35,853 INFO L82 PathProgramCache]: Analyzing trace with hash 326351498, now seen corresponding path program 74 times [2018-12-31 17:26:35,853 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 17:26:35,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 17:26:35,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:35,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 17:26:35,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 17:26:35,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-31 17:26:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-31 17:26:35,976 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-31 17:26:36,151 INFO L305 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-12-31 17:26:36,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.12 05:26:36 BasicIcfg [2018-12-31 17:26:36,154 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-31 17:26:36,155 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-31 17:26:36,155 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-31 17:26:36,155 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-31 17:26:36,155 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 05:24:47" (3/4) ... [2018-12-31 17:26:36,158 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-31 17:26:36,309 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-12-31 17:26:36,309 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-31 17:26:36,313 INFO L168 Benchmark]: Toolchain (without parser) took 110259.86 ms. Allocated memory was 1.0 GB in the beginning and 1.7 GB in the end (delta: 631.2 MB). Free memory was 944.6 MB in the beginning and 1.3 GB in the end (delta: -402.7 MB). Peak memory consumption was 228.5 MB. Max. memory is 11.5 GB. [2018-12-31 17:26:36,313 INFO L168 Benchmark]: CDTParser took 0.15 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 17:26:36,314 INFO L168 Benchmark]: CACSL2BoogieTranslator took 730.14 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.1 MB). Free memory was 944.6 MB in the beginning and 1.1 GB in the end (delta: -156.5 MB). Peak memory consumption was 32.2 MB. Max. memory is 11.5 GB. [2018-12-31 17:26:36,314 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.37 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 17:26:36,314 INFO L168 Benchmark]: Boogie Preprocessor took 34.31 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 17:26:36,315 INFO L168 Benchmark]: RCFGBuilder took 506.40 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: 25.0 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. [2018-12-31 17:26:36,315 INFO L168 Benchmark]: TraceAbstraction took 108771.12 ms. Allocated memory was 1.2 GB in the beginning and 1.7 GB in the end (delta: 510.1 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -310.9 MB). Peak memory consumption was 199.2 MB. Max. memory is 11.5 GB. [2018-12-31 17:26:36,315 INFO L168 Benchmark]: Witness Printer took 154.52 ms. Allocated memory is still 1.7 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 32.8 MB). Peak memory consumption was 32.8 MB. Max. memory is 11.5 GB. [2018-12-31 17:26:36,327 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 730.14 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.1 MB). Free memory was 944.6 MB in the beginning and 1.1 GB in the end (delta: -156.5 MB). Peak memory consumption was 32.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 54.37 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 34.31 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 506.40 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: 25.0 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 108771.12 ms. Allocated memory was 1.2 GB in the beginning and 1.7 GB in the end (delta: 510.1 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -310.9 MB). Peak memory consumption was 199.2 MB. Max. memory is 11.5 GB. * Witness Printer took 154.52 ms. Allocated memory is still 1.7 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 32.8 MB). Peak memory consumption was 32.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 688]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L660] -1 int i = 3, j = 6; VAL [i=3, j=6] [L678] -1 pthread_t id1, id2; VAL [i=3, j=6] [L679] FCALL, FORK -1 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L662] 0 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L680] FCALL, FORK -1 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L670] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L662] COND TRUE 0 k < 20 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L670] COND TRUE 1 k < 20 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=0] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L662] COND TRUE 0 k < 20 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L670] COND TRUE 1 k < 20 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=1] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L662] COND TRUE 0 k < 20 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L670] COND TRUE 1 k < 20 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=2] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L662] COND TRUE 0 k < 20 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L670] COND TRUE 1 k < 20 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=3] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=3] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L662] COND TRUE 0 k < 20 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L670] COND TRUE 1 k < 20 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=5] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L662] COND TRUE 0 k < 20 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L670] COND TRUE 1 k < 20 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=5] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L662] COND TRUE 0 k < 20 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L670] COND TRUE 1 k < 20 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=6] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=6] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L662] COND TRUE 0 k < 20 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L670] COND TRUE 1 k < 20 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=7] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=7] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L662] COND TRUE 0 k < 20 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=8] [L670] COND TRUE 1 k < 20 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=8] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=9] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L662] COND TRUE 0 k < 20 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L670] COND TRUE 1 k < 20 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=9] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L662] COND TRUE 0 k < 20 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=10, k=10] [L670] COND TRUE 1 k < 20 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=10, k=10] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=10, k=11] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=11, k=11] [L662] COND TRUE 0 k < 20 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=28, k=11, k=11] [L670] COND TRUE 1 k < 20 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=11, k=11] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=11, k=12] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=12, k=12] [L662] COND TRUE 0 k < 20 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=12, k=12] [L670] COND TRUE 1 k < 20 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=12, k=12] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=12, k=13] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=13, k=13] [L662] COND TRUE 0 k < 20 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=32, k=13, k=13] [L670] COND TRUE 1 k < 20 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=13, k=13] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=14, k=13] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=14, k=14] [L662] COND TRUE 0 k < 20 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=14, k=14] [L670] COND TRUE 1 k < 20 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=14, k=14] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=14, k=15] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=15, k=15] [L662] COND TRUE 0 k < 20 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=36, k=15, k=15] [L670] COND TRUE 1 k < 20 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=15, k=15] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=15, k=16] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=16] [L662] COND TRUE 0 k < 20 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=38, k=16, k=16] [L670] COND TRUE 1 k < 20 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=16, k=16] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=16, k=17] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=17, k=17] [L662] COND TRUE 0 k < 20 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=40, k=17, k=17] [L670] COND TRUE 1 k < 20 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=17, k=17] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=18, k=17] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=18, k=18] [L662] COND TRUE 0 k < 20 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=18, k=18] [L670] COND TRUE 1 k < 20 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=18, k=18] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=18, k=19] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=19, k=19] [L662] COND TRUE 0 k < 20 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=44, k=19, k=19] [L670] COND TRUE 1 k < 20 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=19, k=19] [L682] -1 int condI = i >= (2*20 +6); [L685] -1 int condJ = j >= (2*20 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=19, k=19] [L687] COND TRUE -1 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=19, k=19] [L688] -1 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=19, k=19] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 64 locations, 1 error locations. UNSAFE Result, 108.6s OverallTime, 80 OverallIterations, 20 TraceHistogramMax, 59.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4383 SDtfs, 38239 SDslu, 44299 SDs, 0 SdLazy, 8625 SolverSat, 7264 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11160 GetRequests, 7659 SyntacticMatches, 0 SemanticMatches, 3501 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37307 ImplicationChecksByTransitivity, 78.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1503occurred in iteration=78, 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: 0.9s AutomataMinimizationTime, 79 MinimizatonAttempts, 12588 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 3.3s SatisfiabilityAnalysisTime, 39.1s InterpolantComputationTime, 15570 NumberOfCodeBlocks, 15570 NumberOfCodeBlocksAsserted, 551 NumberOfCheckSat, 15239 ConstructedInterpolants, 0 QuantifiedInterpolants, 5473067 SizeOfPredicates, 1819 NumberOfNonLiveVariables, 17552 ConjunctsInSsa, 2062 ConjunctsInUnsatCore, 154 InterpolantComputations, 4 PerfectInterpolantSequences, 0/70376 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...