./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/pthread/triangular-longer_true-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 91b1670e Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/svcomp/c/pthread/triangular-longer_true-unreach-call.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 37ab50eb35f71bc9dfb317209ba2fdf85cde6398 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-91b1670 [2018-11-28 19:34:55,056 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 19:34:55,058 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 19:34:55,071 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 19:34:55,071 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 19:34:55,072 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 19:34:55,074 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 19:34:55,076 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 19:34:55,078 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 19:34:55,079 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 19:34:55,080 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 19:34:55,081 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 19:34:55,082 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 19:34:55,083 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 19:34:55,085 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 19:34:55,086 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 19:34:55,087 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 19:34:55,089 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 19:34:55,092 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 19:34:55,094 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 19:34:55,095 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 19:34:55,096 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 19:34:55,099 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 19:34:55,100 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 19:34:55,100 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 19:34:55,101 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 19:34:55,103 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 19:34:55,104 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 19:34:55,105 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 19:34:55,106 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 19:34:55,106 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 19:34:55,107 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 19:34:55,108 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 19:34:55,108 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 19:34:55,109 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 19:34:55,110 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 19:34:55,111 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 19:34:55,128 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 19:34:55,128 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 19:34:55,129 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 19:34:55,130 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 19:34:55,130 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 19:34:55,130 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 19:34:55,131 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 19:34:55,131 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 19:34:55,131 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 19:34:55,132 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 19:34:55,132 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 19:34:55,132 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 19:34:55,132 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 19:34:55,132 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 19:34:55,132 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 19:34:55,133 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 19:34:55,133 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 19:34:55,133 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 19:34:55,133 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 19:34:55,133 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 19:34:55,133 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 19:34:55,135 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 19:34:55,135 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 19:34:55,136 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 19:34:55,136 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 19:34:55,136 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 19:34:55,136 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 19:34:55,136 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 19:34:55,137 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 19:34:55,138 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 19:34:55,138 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37ab50eb35f71bc9dfb317209ba2fdf85cde6398 [2018-11-28 19:34:55,175 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 19:34:55,188 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 19:34:55,192 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 19:34:55,194 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 19:34:55,194 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 19:34:55,195 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/pthread/triangular-longer_true-unreach-call.i [2018-11-28 19:34:55,254 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3fb6bc40/3a20523097b44be787fa7c6fc0c247cf/FLAGafaa6bb95 [2018-11-28 19:34:55,756 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 19:34:55,756 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/pthread/triangular-longer_true-unreach-call.i [2018-11-28 19:34:55,773 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3fb6bc40/3a20523097b44be787fa7c6fc0c247cf/FLAGafaa6bb95 [2018-11-28 19:34:56,063 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3fb6bc40/3a20523097b44be787fa7c6fc0c247cf [2018-11-28 19:34:56,068 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 19:34:56,069 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 19:34:56,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 19:34:56,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 19:34:56,077 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 19:34:56,079 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:34:56" (1/1) ... [2018-11-28 19:34:56,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@460492eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:56, skipping insertion in model container [2018-11-28 19:34:56,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:34:56" (1/1) ... [2018-11-28 19:34:56,092 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 19:34:56,156 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 19:34:56,653 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 19:34:56,673 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 19:34:56,813 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 19:34:56,886 INFO L195 MainTranslator]: Completed translation [2018-11-28 19:34:56,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:56 WrapperNode [2018-11-28 19:34:56,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 19:34:56,887 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 19:34:56,888 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 19:34:56,888 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 19:34:56,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:56" (1/1) ... [2018-11-28 19:34:56,923 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:56" (1/1) ... [2018-11-28 19:34:56,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 19:34:56,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 19:34:56,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 19:34:56,955 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 19:34:56,966 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:56" (1/1) ... [2018-11-28 19:34:56,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:56" (1/1) ... [2018-11-28 19:34:56,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:56" (1/1) ... [2018-11-28 19:34:56,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:56" (1/1) ... [2018-11-28 19:34:56,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:56" (1/1) ... [2018-11-28 19:34:56,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:56" (1/1) ... [2018-11-28 19:34:56,992 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:56" (1/1) ... [2018-11-28 19:34:56,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 19:34:57,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 19:34:57,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 19:34:57,002 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 19:34:57,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 19:34:57,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-28 19:34:57,088 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2018-11-28 19:34:57,089 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2018-11-28 19:34:57,089 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2018-11-28 19:34:57,089 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2018-11-28 19:34:57,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-28 19:34:57,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2018-11-28 19:34:57,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-28 19:34:57,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2018-11-28 19:34:57,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 19:34:57,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 19:34:57,094 WARN L198 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2018-11-28 19:34:57,595 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 19:34:57,595 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-11-28 19:34:57,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:34:57 BoogieIcfgContainer [2018-11-28 19:34:57,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 19:34:57,597 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 19:34:57,597 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 19:34:57,601 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 19:34:57,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:34:56" (1/3) ... [2018-11-28 19:34:57,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@428b6c58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:34:57, skipping insertion in model container [2018-11-28 19:34:57,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:56" (2/3) ... [2018-11-28 19:34:57,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@428b6c58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:34:57, skipping insertion in model container [2018-11-28 19:34:57,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:34:57" (3/3) ... [2018-11-28 19:34:57,604 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer_true-unreach-call.i [2018-11-28 19:34:57,637 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,638 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,638 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,638 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,639 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,639 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,639 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,640 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,640 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,641 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,641 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,641 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,641 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,641 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,642 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,642 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,642 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,642 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,643 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,643 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,643 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,643 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,644 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,644 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,644 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,644 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,644 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,645 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 19:34:57,658 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-11-28 19:34:57,659 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 19:34:57,672 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 19:34:57,690 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 19:34:57,713 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 19:34:57,714 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 19:34:57,714 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 19:34:57,715 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 19:34:57,715 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 19:34:57,715 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 19:34:57,715 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 19:34:57,715 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 19:34:57,715 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 19:34:57,724 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46places, 48 transitions [2018-11-28 19:34:57,790 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2018-11-28 19:34:57,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2018-11-28 19:34:57,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-28 19:34:57,803 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:57,804 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:34:57,806 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:57,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:57,814 INFO L82 PathProgramCache]: Analyzing trace with hash 573491188, now seen corresponding path program 1 times [2018-11-28 19:34:57,816 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:57,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:57,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:57,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:34:57,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:58,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:58,247 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 19:34:58,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 19:34:58,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 19:34:58,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 19:34:58,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-28 19:34:58,272 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2018-11-28 19:34:58,451 WARN L180 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-28 19:34:58,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:58,651 INFO L93 Difference]: Finished difference Result 1411 states and 4051 transitions. [2018-11-28 19:34:58,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 19:34:58,654 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-11-28 19:34:58,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:58,674 INFO L225 Difference]: With dead ends: 1411 [2018-11-28 19:34:58,674 INFO L226 Difference]: Without dead ends: 322 [2018-11-28 19:34:58,676 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-28 19:34:58,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2018-11-28 19:34:58,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2018-11-28 19:34:58,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-11-28 19:34:58,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 820 transitions. [2018-11-28 19:34:58,748 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 820 transitions. Word has length 19 [2018-11-28 19:34:58,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:58,749 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 820 transitions. [2018-11-28 19:34:58,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 19:34:58,749 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 820 transitions. [2018-11-28 19:34:58,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-28 19:34:58,751 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:58,751 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:34:58,752 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:58,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:58,752 INFO L82 PathProgramCache]: Analyzing trace with hash -143811728, now seen corresponding path program 1 times [2018-11-28 19:34:58,752 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:58,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:58,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:58,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:34:58,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:58,905 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 19:34:58,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 19:34:58,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 19:34:58,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 19:34:58,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-28 19:34:58,910 INFO L87 Difference]: Start difference. First operand 322 states and 820 transitions. Second operand 5 states. [2018-11-28 19:34:59,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:59,031 INFO L93 Difference]: Finished difference Result 411 states and 998 transitions. [2018-11-28 19:34:59,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 19:34:59,031 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-11-28 19:34:59,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:59,035 INFO L225 Difference]: With dead ends: 411 [2018-11-28 19:34:59,036 INFO L226 Difference]: Without dead ends: 290 [2018-11-28 19:34:59,036 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-28 19:34:59,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-11-28 19:34:59,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2018-11-28 19:34:59,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-11-28 19:34:59,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2018-11-28 19:34:59,063 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2018-11-28 19:34:59,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:59,063 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2018-11-28 19:34:59,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 19:34:59,064 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2018-11-28 19:34:59,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-28 19:34:59,066 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:59,066 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:34:59,066 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:59,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:59,067 INFO L82 PathProgramCache]: Analyzing trace with hash 28324926, now seen corresponding path program 1 times [2018-11-28 19:34:59,067 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:59,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:59,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:59,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:34:59,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:59,218 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 19:34:59,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-28 19:34:59,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 19:34:59,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 19:34:59,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 19:34:59,221 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2018-11-28 19:34:59,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:34:59,429 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2018-11-28 19:34:59,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 19:34:59,431 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-11-28 19:34:59,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:34:59,434 INFO L225 Difference]: With dead ends: 437 [2018-11-28 19:34:59,434 INFO L226 Difference]: Without dead ends: 309 [2018-11-28 19:34:59,437 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 [2018-11-28 19:34:59,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-11-28 19:34:59,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 299. [2018-11-28 19:34:59,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-11-28 19:34:59,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 732 transitions. [2018-11-28 19:34:59,474 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 732 transitions. Word has length 25 [2018-11-28 19:34:59,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:34:59,474 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 732 transitions. [2018-11-28 19:34:59,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 19:34:59,478 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 732 transitions. [2018-11-28 19:34:59,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-28 19:34:59,479 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:34:59,480 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:34:59,480 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:34:59,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:34:59,480 INFO L82 PathProgramCache]: Analyzing trace with hash 19387626, now seen corresponding path program 2 times [2018-11-28 19:34:59,483 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:34:59,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:34:59,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:59,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:34:59,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:34:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:34:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:34:59,645 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 19:34:59,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-28 19:34:59,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 19:34:59,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 19:34:59,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 19:34:59,646 INFO L87 Difference]: Start difference. First operand 299 states and 732 transitions. Second operand 6 states. [2018-11-28 19:35:00,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:00,064 INFO L93 Difference]: Finished difference Result 456 states and 1095 transitions. [2018-11-28 19:35:00,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 19:35:00,065 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-11-28 19:35:00,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:00,067 INFO L225 Difference]: With dead ends: 456 [2018-11-28 19:35:00,068 INFO L226 Difference]: Without dead ends: 319 [2018-11-28 19:35:00,068 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-28 19:35:00,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-11-28 19:35:00,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-11-28 19:35:00,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-11-28 19:35:00,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2018-11-28 19:35:00,080 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2018-11-28 19:35:00,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:00,080 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2018-11-28 19:35:00,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 19:35:00,080 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2018-11-28 19:35:00,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-28 19:35:00,082 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:00,083 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:00,083 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:00,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:00,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1592611961, now seen corresponding path program 1 times [2018-11-28 19:35:00,083 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:00,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:00,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:00,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:00,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:00,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:00,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:00,502 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:00,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:35:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:00,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:00,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:00,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-28 19:35:00,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 19:35:00,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 19:35:00,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-28 19:35:00,707 INFO L87 Difference]: Start difference. First operand 319 states and 772 transitions. Second operand 8 states. [2018-11-28 19:35:00,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:00,974 INFO L93 Difference]: Finished difference Result 466 states and 1115 transitions. [2018-11-28 19:35:00,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 19:35:00,976 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-11-28 19:35:00,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:00,979 INFO L225 Difference]: With dead ends: 466 [2018-11-28 19:35:00,979 INFO L226 Difference]: Without dead ends: 335 [2018-11-28 19:35:00,980 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-11-28 19:35:00,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-11-28 19:35:00,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 300. [2018-11-28 19:35:00,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2018-11-28 19:35:00,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 734 transitions. [2018-11-28 19:35:00,992 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 734 transitions. Word has length 29 [2018-11-28 19:35:00,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:00,992 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 734 transitions. [2018-11-28 19:35:00,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 19:35:00,992 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 734 transitions. [2018-11-28 19:35:00,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-28 19:35:00,994 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:00,994 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:00,994 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:00,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:00,995 INFO L82 PathProgramCache]: Analyzing trace with hash 2035666861, now seen corresponding path program 1 times [2018-11-28 19:35:00,995 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:00,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:00,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:00,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:35:00,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:01,220 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:01,221 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:01,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:35:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:01,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:01,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:01,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-28 19:35:01,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 19:35:01,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 19:35:01,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-28 19:35:01,439 INFO L87 Difference]: Start difference. First operand 300 states and 734 transitions. Second operand 8 states. [2018-11-28 19:35:01,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:01,601 INFO L93 Difference]: Finished difference Result 482 states and 1147 transitions. [2018-11-28 19:35:01,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 19:35:01,602 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-11-28 19:35:01,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:01,608 INFO L225 Difference]: With dead ends: 482 [2018-11-28 19:35:01,608 INFO L226 Difference]: Without dead ends: 351 [2018-11-28 19:35:01,608 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-11-28 19:35:01,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-11-28 19:35:01,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-11-28 19:35:01,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-11-28 19:35:01,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 836 transitions. [2018-11-28 19:35:01,625 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 836 transitions. Word has length 29 [2018-11-28 19:35:01,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:01,626 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 836 transitions. [2018-11-28 19:35:01,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 19:35:01,627 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 836 transitions. [2018-11-28 19:35:01,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-28 19:35:01,630 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:01,630 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:01,631 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:01,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:01,631 INFO L82 PathProgramCache]: Analyzing trace with hash -460714038, now seen corresponding path program 1 times [2018-11-28 19:35:01,631 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:01,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:01,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:01,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:35:01,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:01,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:01,863 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:01,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:35:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:01,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:01,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:01,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-28 19:35:01,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 19:35:01,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 19:35:01,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-11-28 19:35:01,991 INFO L87 Difference]: Start difference. First operand 351 states and 836 transitions. Second operand 9 states. [2018-11-28 19:35:02,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:02,318 INFO L93 Difference]: Finished difference Result 498 states and 1179 transitions. [2018-11-28 19:35:02,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 19:35:02,319 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-11-28 19:35:02,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:02,321 INFO L225 Difference]: With dead ends: 498 [2018-11-28 19:35:02,321 INFO L226 Difference]: Without dead ends: 367 [2018-11-28 19:35:02,322 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 [2018-11-28 19:35:02,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-11-28 19:35:02,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 316. [2018-11-28 19:35:02,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-11-28 19:35:02,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 766 transitions. [2018-11-28 19:35:02,331 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 766 transitions. Word has length 33 [2018-11-28 19:35:02,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:02,332 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 766 transitions. [2018-11-28 19:35:02,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 19:35:02,332 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 766 transitions. [2018-11-28 19:35:02,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-28 19:35:02,333 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:02,333 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:02,334 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:02,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:02,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1110322378, now seen corresponding path program 2 times [2018-11-28 19:35:02,334 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:02,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:02,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:02,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:35:02,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:02,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:02,474 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:02,491 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 19:35:02,511 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 19:35:02,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:02,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:02,664 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:02,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-28 19:35:02,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 19:35:02,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 19:35:02,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-11-28 19:35:02,665 INFO L87 Difference]: Start difference. First operand 316 states and 766 transitions. Second operand 9 states. [2018-11-28 19:35:02,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:02,846 INFO L93 Difference]: Finished difference Result 514 states and 1211 transitions. [2018-11-28 19:35:02,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 19:35:02,849 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-11-28 19:35:02,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:02,852 INFO L225 Difference]: With dead ends: 514 [2018-11-28 19:35:02,852 INFO L226 Difference]: Without dead ends: 383 [2018-11-28 19:35:02,853 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 [2018-11-28 19:35:02,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-11-28 19:35:02,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2018-11-28 19:35:02,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-11-28 19:35:02,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 900 transitions. [2018-11-28 19:35:02,865 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 900 transitions. Word has length 33 [2018-11-28 19:35:02,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:02,865 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 900 transitions. [2018-11-28 19:35:02,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 19:35:02,865 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 900 transitions. [2018-11-28 19:35:02,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-28 19:35:02,868 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:02,868 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:02,869 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:02,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:02,869 INFO L82 PathProgramCache]: Analyzing trace with hash 2061178471, now seen corresponding path program 3 times [2018-11-28 19:35:02,869 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:02,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:02,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:02,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:02,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:02,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:03,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:03,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:03,000 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:03,023 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 19:35:03,074 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-28 19:35:03,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:03,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:03,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:03,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-28 19:35:03,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 19:35:03,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 19:35:03,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-11-28 19:35:03,171 INFO L87 Difference]: Start difference. First operand 383 states and 900 transitions. Second operand 10 states. [2018-11-28 19:35:03,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:03,470 INFO L93 Difference]: Finished difference Result 530 states and 1243 transitions. [2018-11-28 19:35:03,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 19:35:03,470 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-11-28 19:35:03,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:03,473 INFO L225 Difference]: With dead ends: 530 [2018-11-28 19:35:03,473 INFO L226 Difference]: Without dead ends: 399 [2018-11-28 19:35:03,474 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 [2018-11-28 19:35:03,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-11-28 19:35:03,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 332. [2018-11-28 19:35:03,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2018-11-28 19:35:03,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 798 transitions. [2018-11-28 19:35:03,483 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 798 transitions. Word has length 37 [2018-11-28 19:35:03,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:03,483 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 798 transitions. [2018-11-28 19:35:03,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 19:35:03,483 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 798 transitions. [2018-11-28 19:35:03,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-28 19:35:03,485 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:03,485 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:03,485 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:03,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:03,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1649592435, now seen corresponding path program 4 times [2018-11-28 19:35:03,487 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:03,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:03,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:03,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:03,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:03,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:03,650 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:03,661 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 19:35:03,679 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 19:35:03,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:03,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:03,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:03,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:03,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-28 19:35:03,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 19:35:03,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 19:35:03,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-11-28 19:35:03,736 INFO L87 Difference]: Start difference. First operand 332 states and 798 transitions. Second operand 10 states. [2018-11-28 19:35:03,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:03,876 INFO L93 Difference]: Finished difference Result 546 states and 1275 transitions. [2018-11-28 19:35:03,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 19:35:03,877 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-11-28 19:35:03,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:03,881 INFO L225 Difference]: With dead ends: 546 [2018-11-28 19:35:03,881 INFO L226 Difference]: Without dead ends: 415 [2018-11-28 19:35:03,882 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2018-11-28 19:35:03,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2018-11-28 19:35:03,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2018-11-28 19:35:03,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2018-11-28 19:35:03,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 964 transitions. [2018-11-28 19:35:03,892 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 964 transitions. Word has length 37 [2018-11-28 19:35:03,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:03,892 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 964 transitions. [2018-11-28 19:35:03,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 19:35:03,892 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 964 transitions. [2018-11-28 19:35:03,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-28 19:35:03,893 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:03,893 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:03,894 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:03,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:03,894 INFO L82 PathProgramCache]: Analyzing trace with hash 2086800042, now seen corresponding path program 5 times [2018-11-28 19:35:03,894 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:03,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:03,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:03,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:03,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:04,015 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:04,016 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:04,030 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 19:35:04,057 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-11-28 19:35:04,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:04,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:04,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:04,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-28 19:35:04,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 19:35:04,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 19:35:04,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-28 19:35:04,130 INFO L87 Difference]: Start difference. First operand 415 states and 964 transitions. Second operand 11 states. [2018-11-28 19:35:04,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:04,413 INFO L93 Difference]: Finished difference Result 562 states and 1307 transitions. [2018-11-28 19:35:04,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 19:35:04,414 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-11-28 19:35:04,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:04,417 INFO L225 Difference]: With dead ends: 562 [2018-11-28 19:35:04,417 INFO L226 Difference]: Without dead ends: 431 [2018-11-28 19:35:04,418 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2018-11-28 19:35:04,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-11-28 19:35:04,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 348. [2018-11-28 19:35:04,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2018-11-28 19:35:04,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 830 transitions. [2018-11-28 19:35:04,427 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 830 transitions. Word has length 41 [2018-11-28 19:35:04,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:04,427 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 830 transitions. [2018-11-28 19:35:04,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 19:35:04,427 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 830 transitions. [2018-11-28 19:35:04,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-28 19:35:04,428 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:04,428 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:04,428 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:04,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:04,429 INFO L82 PathProgramCache]: Analyzing trace with hash 449750186, now seen corresponding path program 6 times [2018-11-28 19:35:04,429 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:04,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:04,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:04,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:04,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:04,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:04,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:04,581 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:04,594 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 19:35:04,626 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-11-28 19:35:04,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:04,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:04,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:04,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-28 19:35:04,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 19:35:04,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 19:35:04,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-28 19:35:04,701 INFO L87 Difference]: Start difference. First operand 348 states and 830 transitions. Second operand 11 states. [2018-11-28 19:35:04,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:04,990 INFO L93 Difference]: Finished difference Result 578 states and 1339 transitions. [2018-11-28 19:35:04,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 19:35:04,991 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-11-28 19:35:04,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:04,994 INFO L225 Difference]: With dead ends: 578 [2018-11-28 19:35:04,994 INFO L226 Difference]: Without dead ends: 447 [2018-11-28 19:35:04,995 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2018-11-28 19:35:04,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-11-28 19:35:05,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2018-11-28 19:35:05,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-11-28 19:35:05,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1028 transitions. [2018-11-28 19:35:05,004 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1028 transitions. Word has length 41 [2018-11-28 19:35:05,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:05,005 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1028 transitions. [2018-11-28 19:35:05,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 19:35:05,005 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1028 transitions. [2018-11-28 19:35:05,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-28 19:35:05,006 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:05,006 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:05,006 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:05,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:05,007 INFO L82 PathProgramCache]: Analyzing trace with hash 511353159, now seen corresponding path program 7 times [2018-11-28 19:35:05,007 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:05,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:05,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:05,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:05,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:05,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:05,429 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:05,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:35:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:05,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:05,542 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:05,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:05,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-28 19:35:05,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 19:35:05,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 19:35:05,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-11-28 19:35:05,566 INFO L87 Difference]: Start difference. First operand 447 states and 1028 transitions. Second operand 12 states. [2018-11-28 19:35:05,948 WARN L180 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-28 19:35:06,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:06,104 INFO L93 Difference]: Finished difference Result 594 states and 1371 transitions. [2018-11-28 19:35:06,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 19:35:06,105 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-11-28 19:35:06,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:06,108 INFO L225 Difference]: With dead ends: 594 [2018-11-28 19:35:06,108 INFO L226 Difference]: Without dead ends: 463 [2018-11-28 19:35:06,109 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2018-11-28 19:35:06,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2018-11-28 19:35:06,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 364. [2018-11-28 19:35:06,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-11-28 19:35:06,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 862 transitions. [2018-11-28 19:35:06,117 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 862 transitions. Word has length 45 [2018-11-28 19:35:06,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:06,117 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 862 transitions. [2018-11-28 19:35:06,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 19:35:06,118 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 862 transitions. [2018-11-28 19:35:06,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-28 19:35:06,118 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:06,118 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:06,119 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:06,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:06,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1081163923, now seen corresponding path program 8 times [2018-11-28 19:35:06,119 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:06,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:06,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:06,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:35:06,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:06,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:06,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:06,287 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:06,302 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 19:35:06,354 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 19:35:06,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:06,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:06,450 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:06,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:06,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-28 19:35:06,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 19:35:06,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 19:35:06,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-11-28 19:35:06,475 INFO L87 Difference]: Start difference. First operand 364 states and 862 transitions. Second operand 12 states. [2018-11-28 19:35:06,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:06,670 INFO L93 Difference]: Finished difference Result 610 states and 1403 transitions. [2018-11-28 19:35:06,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 19:35:06,671 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-11-28 19:35:06,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:06,674 INFO L225 Difference]: With dead ends: 610 [2018-11-28 19:35:06,674 INFO L226 Difference]: Without dead ends: 479 [2018-11-28 19:35:06,674 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2018-11-28 19:35:06,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-11-28 19:35:06,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2018-11-28 19:35:06,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-11-28 19:35:06,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1092 transitions. [2018-11-28 19:35:06,685 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1092 transitions. Word has length 45 [2018-11-28 19:35:06,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:06,685 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 1092 transitions. [2018-11-28 19:35:06,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 19:35:06,686 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1092 transitions. [2018-11-28 19:35:06,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-28 19:35:06,687 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:06,687 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:06,687 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:06,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:06,687 INFO L82 PathProgramCache]: Analyzing trace with hash -578738806, now seen corresponding path program 9 times [2018-11-28 19:35:06,688 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:06,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:06,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:06,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:06,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:06,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:06,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:06,945 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:06,956 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 19:35:06,988 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-28 19:35:06,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:06,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:07,152 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:07,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-28 19:35:07,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 19:35:07,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 19:35:07,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-11-28 19:35:07,153 INFO L87 Difference]: Start difference. First operand 479 states and 1092 transitions. Second operand 13 states. [2018-11-28 19:35:07,538 WARN L180 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-11-28 19:35:07,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:07,608 INFO L93 Difference]: Finished difference Result 626 states and 1435 transitions. [2018-11-28 19:35:07,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 19:35:07,609 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-11-28 19:35:07,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:07,612 INFO L225 Difference]: With dead ends: 626 [2018-11-28 19:35:07,612 INFO L226 Difference]: Without dead ends: 495 [2018-11-28 19:35:07,613 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2018-11-28 19:35:07,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-11-28 19:35:07,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 380. [2018-11-28 19:35:07,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2018-11-28 19:35:07,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 894 transitions. [2018-11-28 19:35:07,621 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 894 transitions. Word has length 49 [2018-11-28 19:35:07,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:07,621 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 894 transitions. [2018-11-28 19:35:07,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 19:35:07,622 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 894 transitions. [2018-11-28 19:35:07,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-28 19:35:07,622 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:07,622 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:07,623 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:07,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:07,623 INFO L82 PathProgramCache]: Analyzing trace with hash -555139958, now seen corresponding path program 10 times [2018-11-28 19:35:07,623 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:07,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:07,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:07,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:07,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:07,773 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:07,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:07,773 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:07,786 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 19:35:07,811 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 19:35:07,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:07,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:07,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:07,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-28 19:35:07,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 19:35:07,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 19:35:07,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-11-28 19:35:07,981 INFO L87 Difference]: Start difference. First operand 380 states and 894 transitions. Second operand 13 states. [2018-11-28 19:35:08,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:08,236 INFO L93 Difference]: Finished difference Result 642 states and 1467 transitions. [2018-11-28 19:35:08,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 19:35:08,237 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-11-28 19:35:08,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:08,239 INFO L225 Difference]: With dead ends: 642 [2018-11-28 19:35:08,239 INFO L226 Difference]: Without dead ends: 511 [2018-11-28 19:35:08,241 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 [2018-11-28 19:35:08,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2018-11-28 19:35:08,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2018-11-28 19:35:08,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2018-11-28 19:35:08,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1156 transitions. [2018-11-28 19:35:08,251 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1156 transitions. Word has length 49 [2018-11-28 19:35:08,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:08,251 INFO L480 AbstractCegarLoop]: Abstraction has 511 states and 1156 transitions. [2018-11-28 19:35:08,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 19:35:08,251 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1156 transitions. [2018-11-28 19:35:08,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-28 19:35:08,254 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:08,254 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:08,254 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:08,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:08,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1389448231, now seen corresponding path program 11 times [2018-11-28 19:35:08,256 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:08,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:08,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:08,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:08,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:08,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:08,952 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:08,952 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:08,964 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 19:35:09,036 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-11-28 19:35:09,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:09,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:09,105 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:09,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-11-28 19:35:09,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 19:35:09,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 19:35:09,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-11-28 19:35:09,107 INFO L87 Difference]: Start difference. First operand 511 states and 1156 transitions. Second operand 14 states. [2018-11-28 19:35:09,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:09,346 INFO L93 Difference]: Finished difference Result 658 states and 1499 transitions. [2018-11-28 19:35:09,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 19:35:09,348 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-11-28 19:35:09,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:09,352 INFO L225 Difference]: With dead ends: 658 [2018-11-28 19:35:09,352 INFO L226 Difference]: Without dead ends: 527 [2018-11-28 19:35:09,353 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2018-11-28 19:35:09,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2018-11-28 19:35:09,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 396. [2018-11-28 19:35:09,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2018-11-28 19:35:09,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 926 transitions. [2018-11-28 19:35:09,362 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 926 transitions. Word has length 53 [2018-11-28 19:35:09,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:09,362 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 926 transitions. [2018-11-28 19:35:09,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 19:35:09,363 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 926 transitions. [2018-11-28 19:35:09,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-28 19:35:09,366 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:09,366 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:09,366 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:09,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:09,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1121609549, now seen corresponding path program 12 times [2018-11-28 19:35:09,366 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:09,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:09,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:09,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:09,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:09,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:09,530 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:09,543 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 19:35:09,565 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-11-28 19:35:09,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:09,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:09,604 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:09,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:09,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-11-28 19:35:09,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 19:35:09,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 19:35:09,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-11-28 19:35:09,634 INFO L87 Difference]: Start difference. First operand 396 states and 926 transitions. Second operand 14 states. [2018-11-28 19:35:09,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:09,899 INFO L93 Difference]: Finished difference Result 674 states and 1531 transitions. [2018-11-28 19:35:09,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 19:35:09,900 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-11-28 19:35:09,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:09,904 INFO L225 Difference]: With dead ends: 674 [2018-11-28 19:35:09,904 INFO L226 Difference]: Without dead ends: 543 [2018-11-28 19:35:09,904 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 [2018-11-28 19:35:09,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-11-28 19:35:09,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2018-11-28 19:35:09,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2018-11-28 19:35:09,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1220 transitions. [2018-11-28 19:35:09,913 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1220 transitions. Word has length 53 [2018-11-28 19:35:09,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:09,913 INFO L480 AbstractCegarLoop]: Abstraction has 543 states and 1220 transitions. [2018-11-28 19:35:09,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 19:35:09,915 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1220 transitions. [2018-11-28 19:35:09,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-28 19:35:09,917 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:09,917 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:09,917 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:09,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:09,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1590124650, now seen corresponding path program 13 times [2018-11-28 19:35:09,918 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:09,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:09,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:09,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:09,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:10,060 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:10,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:10,060 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:10,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:35:10,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:10,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:10,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:10,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-11-28 19:35:10,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 19:35:10,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 19:35:10,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-11-28 19:35:10,223 INFO L87 Difference]: Start difference. First operand 543 states and 1220 transitions. Second operand 15 states. [2018-11-28 19:35:10,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:10,473 INFO L93 Difference]: Finished difference Result 690 states and 1563 transitions. [2018-11-28 19:35:10,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 19:35:10,474 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-11-28 19:35:10,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:10,478 INFO L225 Difference]: With dead ends: 690 [2018-11-28 19:35:10,478 INFO L226 Difference]: Without dead ends: 559 [2018-11-28 19:35:10,479 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2018-11-28 19:35:10,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2018-11-28 19:35:10,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 412. [2018-11-28 19:35:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-11-28 19:35:10,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 958 transitions. [2018-11-28 19:35:10,489 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 958 transitions. Word has length 57 [2018-11-28 19:35:10,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:10,489 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 958 transitions. [2018-11-28 19:35:10,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 19:35:10,489 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 958 transitions. [2018-11-28 19:35:10,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-28 19:35:10,490 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:10,490 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:10,493 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:10,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:10,493 INFO L82 PathProgramCache]: Analyzing trace with hash 39711850, now seen corresponding path program 14 times [2018-11-28 19:35:10,493 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:10,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:10,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:10,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:35:10,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:10,728 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:10,728 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:10,728 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:10,746 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 19:35:10,775 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 19:35:10,775 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:10,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:10,840 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:10,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:10,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-11-28 19:35:10,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 19:35:10,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 19:35:10,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-11-28 19:35:10,871 INFO L87 Difference]: Start difference. First operand 412 states and 958 transitions. Second operand 15 states. [2018-11-28 19:35:11,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:11,191 INFO L93 Difference]: Finished difference Result 706 states and 1595 transitions. [2018-11-28 19:35:11,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 19:35:11,193 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-11-28 19:35:11,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:11,196 INFO L225 Difference]: With dead ends: 706 [2018-11-28 19:35:11,196 INFO L226 Difference]: Without dead ends: 575 [2018-11-28 19:35:11,197 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2018-11-28 19:35:11,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2018-11-28 19:35:11,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2018-11-28 19:35:11,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2018-11-28 19:35:11,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1284 transitions. [2018-11-28 19:35:11,206 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1284 transitions. Word has length 57 [2018-11-28 19:35:11,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:11,206 INFO L480 AbstractCegarLoop]: Abstraction has 575 states and 1284 transitions. [2018-11-28 19:35:11,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 19:35:11,206 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1284 transitions. [2018-11-28 19:35:11,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-28 19:35:11,209 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:11,210 INFO L402 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:11,210 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:11,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:11,210 INFO L82 PathProgramCache]: Analyzing trace with hash -21031161, now seen corresponding path program 15 times [2018-11-28 19:35:11,210 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:11,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:11,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:11,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:11,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:12,218 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:12,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:12,219 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:12,232 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 19:35:12,259 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-28 19:35:12,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:12,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:12,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:12,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-11-28 19:35:12,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-28 19:35:12,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-28 19:35:12,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-11-28 19:35:12,335 INFO L87 Difference]: Start difference. First operand 575 states and 1284 transitions. Second operand 16 states. [2018-11-28 19:35:12,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:12,619 INFO L93 Difference]: Finished difference Result 722 states and 1627 transitions. [2018-11-28 19:35:12,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-28 19:35:12,620 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2018-11-28 19:35:12,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:12,623 INFO L225 Difference]: With dead ends: 722 [2018-11-28 19:35:12,623 INFO L226 Difference]: Without dead ends: 591 [2018-11-28 19:35:12,624 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2018-11-28 19:35:12,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2018-11-28 19:35:12,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 428. [2018-11-28 19:35:12,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2018-11-28 19:35:12,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 990 transitions. [2018-11-28 19:35:12,634 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 990 transitions. Word has length 61 [2018-11-28 19:35:12,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:12,634 INFO L480 AbstractCegarLoop]: Abstraction has 428 states and 990 transitions. [2018-11-28 19:35:12,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-28 19:35:12,635 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 990 transitions. [2018-11-28 19:35:12,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-28 19:35:12,635 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:12,638 INFO L402 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:12,638 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:12,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:12,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1418711251, now seen corresponding path program 16 times [2018-11-28 19:35:12,638 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:12,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:12,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:12,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:12,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:12,881 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:12,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:12,882 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:12,893 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 19:35:12,936 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 19:35:12,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:12,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:12,989 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:13,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:13,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-11-28 19:35:13,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-28 19:35:13,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-28 19:35:13,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-11-28 19:35:13,009 INFO L87 Difference]: Start difference. First operand 428 states and 990 transitions. Second operand 16 states. [2018-11-28 19:35:13,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:13,401 INFO L93 Difference]: Finished difference Result 738 states and 1659 transitions. [2018-11-28 19:35:13,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 19:35:13,401 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2018-11-28 19:35:13,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:13,405 INFO L225 Difference]: With dead ends: 738 [2018-11-28 19:35:13,405 INFO L226 Difference]: Without dead ends: 607 [2018-11-28 19:35:13,405 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 [2018-11-28 19:35:13,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2018-11-28 19:35:13,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2018-11-28 19:35:13,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2018-11-28 19:35:13,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1348 transitions. [2018-11-28 19:35:13,416 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1348 transitions. Word has length 61 [2018-11-28 19:35:13,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:13,417 INFO L480 AbstractCegarLoop]: Abstraction has 607 states and 1348 transitions. [2018-11-28 19:35:13,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-28 19:35:13,417 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1348 transitions. [2018-11-28 19:35:13,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-28 19:35:13,418 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:13,418 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:13,418 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:13,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:13,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1997847370, now seen corresponding path program 17 times [2018-11-28 19:35:13,421 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:13,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:13,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:13,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:13,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:13,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:13,663 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:13,677 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 19:35:13,704 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-28 19:35:13,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:13,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:13,744 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:13,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:13,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-11-28 19:35:13,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-28 19:35:13,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-28 19:35:13,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-11-28 19:35:13,764 INFO L87 Difference]: Start difference. First operand 607 states and 1348 transitions. Second operand 17 states. [2018-11-28 19:35:14,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:14,067 INFO L93 Difference]: Finished difference Result 754 states and 1691 transitions. [2018-11-28 19:35:14,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-28 19:35:14,067 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2018-11-28 19:35:14,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:14,072 INFO L225 Difference]: With dead ends: 754 [2018-11-28 19:35:14,072 INFO L226 Difference]: Without dead ends: 623 [2018-11-28 19:35:14,072 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 [2018-11-28 19:35:14,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2018-11-28 19:35:14,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 444. [2018-11-28 19:35:14,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2018-11-28 19:35:14,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1022 transitions. [2018-11-28 19:35:14,082 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1022 transitions. Word has length 65 [2018-11-28 19:35:14,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:14,082 INFO L480 AbstractCegarLoop]: Abstraction has 444 states and 1022 transitions. [2018-11-28 19:35:14,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-28 19:35:14,084 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1022 transitions. [2018-11-28 19:35:14,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-28 19:35:14,085 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:14,085 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:14,085 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:14,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:14,087 INFO L82 PathProgramCache]: Analyzing trace with hash 420269130, now seen corresponding path program 18 times [2018-11-28 19:35:14,087 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:14,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:14,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:14,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:14,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:14,262 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:14,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:14,262 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:14,275 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 19:35:14,300 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-11-28 19:35:14,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:14,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:14,393 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:14,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:14,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-11-28 19:35:14,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-28 19:35:14,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-28 19:35:14,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-11-28 19:35:14,413 INFO L87 Difference]: Start difference. First operand 444 states and 1022 transitions. Second operand 17 states. [2018-11-28 19:35:14,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:14,880 INFO L93 Difference]: Finished difference Result 770 states and 1723 transitions. [2018-11-28 19:35:14,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-28 19:35:14,881 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2018-11-28 19:35:14,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:14,885 INFO L225 Difference]: With dead ends: 770 [2018-11-28 19:35:14,885 INFO L226 Difference]: Without dead ends: 639 [2018-11-28 19:35:14,886 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=608, Unknown=0, NotChecked=0, Total=870 [2018-11-28 19:35:14,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2018-11-28 19:35:14,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 639. [2018-11-28 19:35:14,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 639 states. [2018-11-28 19:35:14,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1412 transitions. [2018-11-28 19:35:14,896 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1412 transitions. Word has length 65 [2018-11-28 19:35:14,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:14,896 INFO L480 AbstractCegarLoop]: Abstraction has 639 states and 1412 transitions. [2018-11-28 19:35:14,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-28 19:35:14,896 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1412 transitions. [2018-11-28 19:35:14,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-28 19:35:14,900 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:14,900 INFO L402 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:14,900 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:14,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:14,901 INFO L82 PathProgramCache]: Analyzing trace with hash 690225639, now seen corresponding path program 19 times [2018-11-28 19:35:14,901 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:14,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:14,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:14,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:14,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:15,227 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:15,227 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:15,227 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:15,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:35:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:15,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:15,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:15,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-11-28 19:35:15,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-28 19:35:15,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-28 19:35:15,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2018-11-28 19:35:15,321 INFO L87 Difference]: Start difference. First operand 639 states and 1412 transitions. Second operand 18 states. [2018-11-28 19:35:15,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:15,650 INFO L93 Difference]: Finished difference Result 786 states and 1755 transitions. [2018-11-28 19:35:15,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-28 19:35:15,651 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2018-11-28 19:35:15,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:15,654 INFO L225 Difference]: With dead ends: 786 [2018-11-28 19:35:15,655 INFO L226 Difference]: Without dead ends: 655 [2018-11-28 19:35:15,655 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2018-11-28 19:35:15,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2018-11-28 19:35:15,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 460. [2018-11-28 19:35:15,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-11-28 19:35:15,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1054 transitions. [2018-11-28 19:35:15,662 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1054 transitions. Word has length 69 [2018-11-28 19:35:15,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:15,663 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 1054 transitions. [2018-11-28 19:35:15,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-28 19:35:15,663 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1054 transitions. [2018-11-28 19:35:15,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-28 19:35:15,664 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:15,664 INFO L402 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:15,664 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:15,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:15,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1657792755, now seen corresponding path program 20 times [2018-11-28 19:35:15,665 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:15,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:15,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:15,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:35:15,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:15,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:15,923 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:15,934 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 19:35:15,956 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 19:35:15,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:15,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:16,045 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:16,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:16,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-11-28 19:35:16,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-28 19:35:16,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-28 19:35:16,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2018-11-28 19:35:16,064 INFO L87 Difference]: Start difference. First operand 460 states and 1054 transitions. Second operand 18 states. [2018-11-28 19:35:16,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:16,386 INFO L93 Difference]: Finished difference Result 802 states and 1787 transitions. [2018-11-28 19:35:16,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-28 19:35:16,388 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2018-11-28 19:35:16,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:16,391 INFO L225 Difference]: With dead ends: 802 [2018-11-28 19:35:16,391 INFO L226 Difference]: Without dead ends: 671 [2018-11-28 19:35:16,392 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=284, Invalid=708, Unknown=0, NotChecked=0, Total=992 [2018-11-28 19:35:16,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2018-11-28 19:35:16,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 671. [2018-11-28 19:35:16,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 671 states. [2018-11-28 19:35:16,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1476 transitions. [2018-11-28 19:35:16,402 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1476 transitions. Word has length 69 [2018-11-28 19:35:16,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:16,402 INFO L480 AbstractCegarLoop]: Abstraction has 671 states and 1476 transitions. [2018-11-28 19:35:16,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-28 19:35:16,402 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1476 transitions. [2018-11-28 19:35:16,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-28 19:35:16,404 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:16,404 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:16,405 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:16,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:16,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1119275478, now seen corresponding path program 21 times [2018-11-28 19:35:16,405 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:16,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:16,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:16,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:16,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:16,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:16,602 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:16,617 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 19:35:16,646 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-28 19:35:16,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:16,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:16,682 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:16,700 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:16,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-11-28 19:35:16,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-28 19:35:16,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-28 19:35:16,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2018-11-28 19:35:16,702 INFO L87 Difference]: Start difference. First operand 671 states and 1476 transitions. Second operand 19 states. [2018-11-28 19:35:17,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:17,079 INFO L93 Difference]: Finished difference Result 818 states and 1819 transitions. [2018-11-28 19:35:17,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-28 19:35:17,080 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2018-11-28 19:35:17,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:17,084 INFO L225 Difference]: With dead ends: 818 [2018-11-28 19:35:17,084 INFO L226 Difference]: Without dead ends: 687 [2018-11-28 19:35:17,085 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2018-11-28 19:35:17,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2018-11-28 19:35:17,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 476. [2018-11-28 19:35:17,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2018-11-28 19:35:17,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1086 transitions. [2018-11-28 19:35:17,095 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1086 transitions. Word has length 73 [2018-11-28 19:35:17,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:17,096 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 1086 transitions. [2018-11-28 19:35:17,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-28 19:35:17,098 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1086 transitions. [2018-11-28 19:35:17,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-28 19:35:17,100 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:17,100 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:17,101 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:17,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:17,102 INFO L82 PathProgramCache]: Analyzing trace with hash -690633686, now seen corresponding path program 22 times [2018-11-28 19:35:17,102 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:17,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:17,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:17,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:17,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:17,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:17,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:17,310 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:17,322 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 19:35:17,348 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 19:35:17,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:17,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:17,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:17,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-11-28 19:35:17,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-28 19:35:17,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-28 19:35:17,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2018-11-28 19:35:17,397 INFO L87 Difference]: Start difference. First operand 476 states and 1086 transitions. Second operand 19 states. [2018-11-28 19:35:17,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:17,810 INFO L93 Difference]: Finished difference Result 834 states and 1851 transitions. [2018-11-28 19:35:17,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-28 19:35:17,812 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2018-11-28 19:35:17,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:17,816 INFO L225 Difference]: With dead ends: 834 [2018-11-28 19:35:17,816 INFO L226 Difference]: Without dead ends: 703 [2018-11-28 19:35:17,816 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 [2018-11-28 19:35:17,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2018-11-28 19:35:17,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 703. [2018-11-28 19:35:17,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2018-11-28 19:35:17,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1540 transitions. [2018-11-28 19:35:17,827 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1540 transitions. Word has length 73 [2018-11-28 19:35:17,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:17,827 INFO L480 AbstractCegarLoop]: Abstraction has 703 states and 1540 transitions. [2018-11-28 19:35:17,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-28 19:35:17,827 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1540 transitions. [2018-11-28 19:35:17,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-11-28 19:35:17,829 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:17,829 INFO L402 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:17,830 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:17,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:17,830 INFO L82 PathProgramCache]: Analyzing trace with hash -119534393, now seen corresponding path program 23 times [2018-11-28 19:35:17,830 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:17,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:17,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:17,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:17,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:18,051 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:18,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:18,051 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:18,064 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 19:35:18,101 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-11-28 19:35:18,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:18,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:18,278 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:18,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:18,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-11-28 19:35:18,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-28 19:35:18,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-28 19:35:18,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2018-11-28 19:35:18,299 INFO L87 Difference]: Start difference. First operand 703 states and 1540 transitions. Second operand 20 states. [2018-11-28 19:35:18,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:18,882 INFO L93 Difference]: Finished difference Result 850 states and 1883 transitions. [2018-11-28 19:35:18,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-28 19:35:18,884 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 77 [2018-11-28 19:35:18,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:18,888 INFO L225 Difference]: With dead ends: 850 [2018-11-28 19:35:18,889 INFO L226 Difference]: Without dead ends: 719 [2018-11-28 19:35:18,889 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=379, Invalid=881, Unknown=0, NotChecked=0, Total=1260 [2018-11-28 19:35:18,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2018-11-28 19:35:18,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 492. [2018-11-28 19:35:18,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 492 states. [2018-11-28 19:35:18,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1118 transitions. [2018-11-28 19:35:18,898 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1118 transitions. Word has length 77 [2018-11-28 19:35:18,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:18,898 INFO L480 AbstractCegarLoop]: Abstraction has 492 states and 1118 transitions. [2018-11-28 19:35:18,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-28 19:35:18,898 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1118 transitions. [2018-11-28 19:35:18,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-11-28 19:35:18,899 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:18,899 INFO L402 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:18,899 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:18,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:18,900 INFO L82 PathProgramCache]: Analyzing trace with hash -604365075, now seen corresponding path program 24 times [2018-11-28 19:35:18,900 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:18,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:18,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:18,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:18,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:18,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:19,151 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:19,151 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:19,151 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:19,162 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 19:35:19,193 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-11-28 19:35:19,193 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:19,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:19,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:19,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-11-28 19:35:19,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-28 19:35:19,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-28 19:35:19,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2018-11-28 19:35:19,260 INFO L87 Difference]: Start difference. First operand 492 states and 1118 transitions. Second operand 20 states. [2018-11-28 19:35:19,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:19,648 INFO L93 Difference]: Finished difference Result 866 states and 1915 transitions. [2018-11-28 19:35:19,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-28 19:35:19,649 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 77 [2018-11-28 19:35:19,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:19,654 INFO L225 Difference]: With dead ends: 866 [2018-11-28 19:35:19,654 INFO L226 Difference]: Without dead ends: 735 [2018-11-28 19:35:19,655 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=359, Invalid=901, Unknown=0, NotChecked=0, Total=1260 [2018-11-28 19:35:19,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2018-11-28 19:35:19,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 735. [2018-11-28 19:35:19,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 735 states. [2018-11-28 19:35:19,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1604 transitions. [2018-11-28 19:35:19,664 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1604 transitions. Word has length 77 [2018-11-28 19:35:19,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:19,664 INFO L480 AbstractCegarLoop]: Abstraction has 735 states and 1604 transitions. [2018-11-28 19:35:19,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-28 19:35:19,664 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1604 transitions. [2018-11-28 19:35:19,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-11-28 19:35:19,666 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:19,666 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:19,666 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:19,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:19,666 INFO L82 PathProgramCache]: Analyzing trace with hash -398143222, now seen corresponding path program 25 times [2018-11-28 19:35:19,666 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:19,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:19,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:19,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:19,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:19,939 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:19,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:19,939 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:19,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:35:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:19,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:20,026 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:20,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-11-28 19:35:20,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-28 19:35:20,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-28 19:35:20,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2018-11-28 19:35:20,028 INFO L87 Difference]: Start difference. First operand 735 states and 1604 transitions. Second operand 21 states. [2018-11-28 19:35:20,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:20,447 INFO L93 Difference]: Finished difference Result 882 states and 1947 transitions. [2018-11-28 19:35:20,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-28 19:35:20,448 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2018-11-28 19:35:20,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:20,452 INFO L225 Difference]: With dead ends: 882 [2018-11-28 19:35:20,452 INFO L226 Difference]: Without dead ends: 751 [2018-11-28 19:35:20,453 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=969, Unknown=0, NotChecked=0, Total=1406 [2018-11-28 19:35:20,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2018-11-28 19:35:20,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 508. [2018-11-28 19:35:20,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2018-11-28 19:35:20,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1150 transitions. [2018-11-28 19:35:20,462 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1150 transitions. Word has length 81 [2018-11-28 19:35:20,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:20,462 INFO L480 AbstractCegarLoop]: Abstraction has 508 states and 1150 transitions. [2018-11-28 19:35:20,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-28 19:35:20,462 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1150 transitions. [2018-11-28 19:35:20,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-11-28 19:35:20,463 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:20,463 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:20,464 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:20,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:20,464 INFO L82 PathProgramCache]: Analyzing trace with hash 261676042, now seen corresponding path program 26 times [2018-11-28 19:35:20,464 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:20,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:20,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:20,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:35:20,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:21,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:21,379 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:21,391 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 19:35:21,418 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 19:35:21,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:21,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:21,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:21,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-11-28 19:35:21,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-28 19:35:21,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-28 19:35:21,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2018-11-28 19:35:21,486 INFO L87 Difference]: Start difference. First operand 508 states and 1150 transitions. Second operand 21 states. [2018-11-28 19:35:21,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:21,912 INFO L93 Difference]: Finished difference Result 898 states and 1979 transitions. [2018-11-28 19:35:21,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-28 19:35:21,914 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2018-11-28 19:35:21,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:21,918 INFO L225 Difference]: With dead ends: 898 [2018-11-28 19:35:21,918 INFO L226 Difference]: Without dead ends: 767 [2018-11-28 19:35:21,918 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=424, Invalid=982, Unknown=0, NotChecked=0, Total=1406 [2018-11-28 19:35:21,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2018-11-28 19:35:21,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2018-11-28 19:35:21,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2018-11-28 19:35:21,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1668 transitions. [2018-11-28 19:35:21,929 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1668 transitions. Word has length 81 [2018-11-28 19:35:21,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:21,930 INFO L480 AbstractCegarLoop]: Abstraction has 767 states and 1668 transitions. [2018-11-28 19:35:21,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-28 19:35:21,930 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1668 transitions. [2018-11-28 19:35:21,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-28 19:35:21,932 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:21,932 INFO L402 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:21,932 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:21,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:21,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1261226073, now seen corresponding path program 27 times [2018-11-28 19:35:21,932 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:21,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:21,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:21,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:21,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:21,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:22,195 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:22,195 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:22,215 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 19:35:22,249 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-11-28 19:35:22,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:22,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:22,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:22,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-11-28 19:35:22,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-28 19:35:22,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-28 19:35:22,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2018-11-28 19:35:22,317 INFO L87 Difference]: Start difference. First operand 767 states and 1668 transitions. Second operand 22 states. [2018-11-28 19:35:22,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:22,796 INFO L93 Difference]: Finished difference Result 914 states and 2011 transitions. [2018-11-28 19:35:22,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-28 19:35:22,798 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 85 [2018-11-28 19:35:22,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:22,801 INFO L225 Difference]: With dead ends: 914 [2018-11-28 19:35:22,801 INFO L226 Difference]: Without dead ends: 783 [2018-11-28 19:35:22,802 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=470, Invalid=1090, Unknown=0, NotChecked=0, Total=1560 [2018-11-28 19:35:22,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2018-11-28 19:35:22,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 524. [2018-11-28 19:35:22,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2018-11-28 19:35:22,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1182 transitions. [2018-11-28 19:35:22,811 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1182 transitions. Word has length 85 [2018-11-28 19:35:22,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:22,812 INFO L480 AbstractCegarLoop]: Abstraction has 524 states and 1182 transitions. [2018-11-28 19:35:22,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-28 19:35:22,812 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1182 transitions. [2018-11-28 19:35:22,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-28 19:35:22,813 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:22,813 INFO L402 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:22,813 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:22,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:22,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1269712589, now seen corresponding path program 28 times [2018-11-28 19:35:22,817 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:22,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:22,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:22,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:22,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:23,231 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:23,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:23,231 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:23,243 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 19:35:23,275 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 19:35:23,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:23,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:23,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:23,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-11-28 19:35:23,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-28 19:35:23,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-28 19:35:23,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2018-11-28 19:35:23,339 INFO L87 Difference]: Start difference. First operand 524 states and 1182 transitions. Second operand 22 states. [2018-11-28 19:35:24,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:24,011 INFO L93 Difference]: Finished difference Result 930 states and 2043 transitions. [2018-11-28 19:35:24,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-28 19:35:24,012 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 85 [2018-11-28 19:35:24,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:24,016 INFO L225 Difference]: With dead ends: 930 [2018-11-28 19:35:24,016 INFO L226 Difference]: Without dead ends: 799 [2018-11-28 19:35:24,017 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 [2018-11-28 19:35:24,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2018-11-28 19:35:24,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 799. [2018-11-28 19:35:24,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 799 states. [2018-11-28 19:35:24,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1732 transitions. [2018-11-28 19:35:24,032 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1732 transitions. Word has length 85 [2018-11-28 19:35:24,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:24,032 INFO L480 AbstractCegarLoop]: Abstraction has 799 states and 1732 transitions. [2018-11-28 19:35:24,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-28 19:35:24,032 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1732 transitions. [2018-11-28 19:35:24,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-11-28 19:35:24,035 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:24,035 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:24,035 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:24,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:24,036 INFO L82 PathProgramCache]: Analyzing trace with hash -823686166, now seen corresponding path program 29 times [2018-11-28 19:35:24,036 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:24,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:24,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:24,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:24,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:24,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:24,816 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:24,839 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 19:35:24,882 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-11-28 19:35:24,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:24,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:24,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:24,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-11-28 19:35:24,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-28 19:35:24,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-28 19:35:24,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2018-11-28 19:35:24,941 INFO L87 Difference]: Start difference. First operand 799 states and 1732 transitions. Second operand 23 states. [2018-11-28 19:35:25,869 WARN L180 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2018-11-28 19:35:26,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:26,030 INFO L93 Difference]: Finished difference Result 946 states and 2075 transitions. [2018-11-28 19:35:26,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-28 19:35:26,031 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 89 [2018-11-28 19:35:26,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:26,035 INFO L225 Difference]: With dead ends: 946 [2018-11-28 19:35:26,035 INFO L226 Difference]: Without dead ends: 815 [2018-11-28 19:35:26,036 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=535, Invalid=1187, Unknown=0, NotChecked=0, Total=1722 [2018-11-28 19:35:26,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2018-11-28 19:35:26,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 540. [2018-11-28 19:35:26,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2018-11-28 19:35:26,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1214 transitions. [2018-11-28 19:35:26,046 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1214 transitions. Word has length 89 [2018-11-28 19:35:26,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:26,046 INFO L480 AbstractCegarLoop]: Abstraction has 540 states and 1214 transitions. [2018-11-28 19:35:26,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-28 19:35:26,046 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1214 transitions. [2018-11-28 19:35:26,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-11-28 19:35:26,050 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:26,050 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:26,051 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:26,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:26,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1221192726, now seen corresponding path program 30 times [2018-11-28 19:35:26,051 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:26,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:26,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:26,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:26,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:26,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:26,294 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:26,305 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 19:35:26,345 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-11-28 19:35:26,345 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:26,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:26,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:26,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-11-28 19:35:26,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-28 19:35:26,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-28 19:35:26,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2018-11-28 19:35:26,427 INFO L87 Difference]: Start difference. First operand 540 states and 1214 transitions. Second operand 23 states. [2018-11-28 19:35:26,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:26,971 INFO L93 Difference]: Finished difference Result 962 states and 2107 transitions. [2018-11-28 19:35:26,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-28 19:35:26,972 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 89 [2018-11-28 19:35:26,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:26,974 INFO L225 Difference]: With dead ends: 962 [2018-11-28 19:35:26,974 INFO L226 Difference]: Without dead ends: 831 [2018-11-28 19:35:26,975 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2018-11-28 19:35:26,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2018-11-28 19:35:26,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 831. [2018-11-28 19:35:26,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2018-11-28 19:35:26,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1796 transitions. [2018-11-28 19:35:26,990 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1796 transitions. Word has length 89 [2018-11-28 19:35:26,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:26,990 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 1796 transitions. [2018-11-28 19:35:26,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-28 19:35:26,990 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1796 transitions. [2018-11-28 19:35:26,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-11-28 19:35:26,991 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:26,991 INFO L402 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:26,992 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:26,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:26,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1008893305, now seen corresponding path program 31 times [2018-11-28 19:35:26,992 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:26,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:26,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:26,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:26,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:27,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:27,539 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:27,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:35:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:27,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:27,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:27,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-11-28 19:35:27,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-28 19:35:27,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-28 19:35:27,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2018-11-28 19:35:27,637 INFO L87 Difference]: Start difference. First operand 831 states and 1796 transitions. Second operand 24 states. [2018-11-28 19:35:28,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:28,156 INFO L93 Difference]: Finished difference Result 978 states and 2139 transitions. [2018-11-28 19:35:28,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-28 19:35:28,159 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2018-11-28 19:35:28,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:28,163 INFO L225 Difference]: With dead ends: 978 [2018-11-28 19:35:28,163 INFO L226 Difference]: Without dead ends: 847 [2018-11-28 19:35:28,164 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 [2018-11-28 19:35:28,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2018-11-28 19:35:28,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 556. [2018-11-28 19:35:28,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2018-11-28 19:35:28,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1246 transitions. [2018-11-28 19:35:28,174 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1246 transitions. Word has length 93 [2018-11-28 19:35:28,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:28,175 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 1246 transitions. [2018-11-28 19:35:28,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-28 19:35:28,175 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1246 transitions. [2018-11-28 19:35:28,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-11-28 19:35:28,176 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:28,176 INFO L402 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:28,176 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:28,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:28,176 INFO L82 PathProgramCache]: Analyzing trace with hash -265515347, now seen corresponding path program 32 times [2018-11-28 19:35:28,177 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:28,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:28,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:28,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 19:35:28,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:28,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:28,435 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:28,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:28,435 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:28,450 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 19:35:28,506 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 19:35:28,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:28,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:28,723 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:28,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:28,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-11-28 19:35:28,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-28 19:35:28,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-28 19:35:28,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2018-11-28 19:35:28,743 INFO L87 Difference]: Start difference. First operand 556 states and 1246 transitions. Second operand 24 states. [2018-11-28 19:35:29,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:29,434 INFO L93 Difference]: Finished difference Result 994 states and 2171 transitions. [2018-11-28 19:35:29,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-28 19:35:29,435 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2018-11-28 19:35:29,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:29,437 INFO L225 Difference]: With dead ends: 994 [2018-11-28 19:35:29,437 INFO L226 Difference]: Without dead ends: 863 [2018-11-28 19:35:29,438 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=536, Invalid=1356, Unknown=0, NotChecked=0, Total=1892 [2018-11-28 19:35:29,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2018-11-28 19:35:29,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 863. [2018-11-28 19:35:29,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 863 states. [2018-11-28 19:35:29,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1860 transitions. [2018-11-28 19:35:29,449 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1860 transitions. Word has length 93 [2018-11-28 19:35:29,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:29,449 INFO L480 AbstractCegarLoop]: Abstraction has 863 states and 1860 transitions. [2018-11-28 19:35:29,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-28 19:35:29,449 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1860 transitions. [2018-11-28 19:35:29,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-28 19:35:29,450 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:29,451 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:29,451 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:29,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:29,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1745970890, now seen corresponding path program 33 times [2018-11-28 19:35:29,451 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:29,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:29,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:29,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:29,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:29,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:30,504 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:30,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:30,504 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 19:35:30,517 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 19:35:30,555 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-28 19:35:30,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:30,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:30,636 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:30,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:30,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-11-28 19:35:30,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-28 19:35:30,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-28 19:35:30,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2018-11-28 19:35:30,663 INFO L87 Difference]: Start difference. First operand 863 states and 1860 transitions. Second operand 25 states. [2018-11-28 19:35:31,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:31,227 INFO L93 Difference]: Finished difference Result 1010 states and 2203 transitions. [2018-11-28 19:35:31,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-28 19:35:31,228 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2018-11-28 19:35:31,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:31,231 INFO L225 Difference]: With dead ends: 1010 [2018-11-28 19:35:31,231 INFO L226 Difference]: Without dead ends: 879 [2018-11-28 19:35:31,232 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=579, Invalid=1491, Unknown=0, NotChecked=0, Total=2070 [2018-11-28 19:35:31,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2018-11-28 19:35:31,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 572. [2018-11-28 19:35:31,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2018-11-28 19:35:31,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1278 transitions. [2018-11-28 19:35:31,241 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1278 transitions. Word has length 97 [2018-11-28 19:35:31,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:31,242 INFO L480 AbstractCegarLoop]: Abstraction has 572 states and 1278 transitions. [2018-11-28 19:35:31,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-28 19:35:31,242 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1278 transitions. [2018-11-28 19:35:31,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-28 19:35:31,243 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:31,243 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 19:35:31,243 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:31,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:31,243 INFO L82 PathProgramCache]: Analyzing trace with hash -510825526, now seen corresponding path program 34 times [2018-11-28 19:35:31,243 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:31,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:31,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:31,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:31,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:31,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:31,562 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-28 19:35:31,575 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 19:35:31,608 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 19:35:31,608 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:31,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:31,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 19:35:31,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-11-28 19:35:31,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-28 19:35:31,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-28 19:35:31,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2018-11-28 19:35:31,675 INFO L87 Difference]: Start difference. First operand 572 states and 1278 transitions. Second operand 25 states. [2018-11-28 19:35:32,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:32,437 INFO L93 Difference]: Finished difference Result 1026 states and 2235 transitions. [2018-11-28 19:35:32,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-28 19:35:32,439 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2018-11-28 19:35:32,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:32,441 INFO L225 Difference]: With dead ends: 1026 [2018-11-28 19:35:32,441 INFO L226 Difference]: Without dead ends: 895 [2018-11-28 19:35:32,442 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=626, Invalid=1444, Unknown=0, NotChecked=0, Total=2070 [2018-11-28 19:35:32,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2018-11-28 19:35:32,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 895. [2018-11-28 19:35:32,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 895 states. [2018-11-28 19:35:32,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1924 transitions. [2018-11-28 19:35:32,456 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1924 transitions. Word has length 97 [2018-11-28 19:35:32,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:32,457 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 1924 transitions. [2018-11-28 19:35:32,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-28 19:35:32,457 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1924 transitions. [2018-11-28 19:35:32,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-11-28 19:35:32,458 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:32,459 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] [2018-11-28 19:35:32,459 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:32,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:32,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1394676377, now seen corresponding path program 35 times [2018-11-28 19:35:32,459 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:32,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:32,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:32,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:32,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:32,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:33,366 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 315 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:33,367 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:33,367 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 [2018-11-28 19:35:33,378 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 19:35:33,424 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-11-28 19:35:33,424 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:33,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:33,946 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:33,984 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-28 19:35:33,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2018-11-28 19:35:33,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-28 19:35:33,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-28 19:35:33,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2018-11-28 19:35:33,985 INFO L87 Difference]: Start difference. First operand 895 states and 1924 transitions. Second operand 25 states. [2018-11-28 19:35:35,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:35,737 INFO L93 Difference]: Finished difference Result 3739 states and 7426 transitions. [2018-11-28 19:35:35,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-28 19:35:35,746 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 101 [2018-11-28 19:35:35,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:35,749 INFO L225 Difference]: With dead ends: 3739 [2018-11-28 19:35:35,750 INFO L226 Difference]: Without dead ends: 567 [2018-11-28 19:35:35,751 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=575, Invalid=1405, Unknown=0, NotChecked=0, Total=1980 [2018-11-28 19:35:35,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2018-11-28 19:35:35,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2018-11-28 19:35:35,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2018-11-28 19:35:35,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1197 transitions. [2018-11-28 19:35:35,760 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1197 transitions. Word has length 101 [2018-11-28 19:35:35,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:35,760 INFO L480 AbstractCegarLoop]: Abstraction has 567 states and 1197 transitions. [2018-11-28 19:35:35,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-28 19:35:35,760 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1197 transitions. [2018-11-28 19:35:35,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-11-28 19:35:35,761 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 19:35:35,761 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] [2018-11-28 19:35:35,762 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 19:35:35,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 19:35:35,762 INFO L82 PathProgramCache]: Analyzing trace with hash -313198963, now seen corresponding path program 36 times [2018-11-28 19:35:35,762 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 19:35:35,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 19:35:35,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:35,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 19:35:35,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 19:35:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 19:35:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 282 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:36,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 19:35:36,589 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 [2018-11-28 19:35:36,603 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 19:35:36,646 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-11-28 19:35:36,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 19:35:36,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 19:35:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 19:35:36,740 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-28 19:35:36,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2018-11-28 19:35:36,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-28 19:35:36,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-28 19:35:36,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2018-11-28 19:35:36,742 INFO L87 Difference]: Start difference. First operand 567 states and 1197 transitions. Second operand 25 states. [2018-11-28 19:35:37,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 19:35:37,154 INFO L93 Difference]: Finished difference Result 1883 states and 3445 transitions. [2018-11-28 19:35:37,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-28 19:35:37,155 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 101 [2018-11-28 19:35:37,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 19:35:37,156 INFO L225 Difference]: With dead ends: 1883 [2018-11-28 19:35:37,156 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 19:35:37,157 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=575, Invalid=1405, Unknown=0, NotChecked=0, Total=1980 [2018-11-28 19:35:37,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 19:35:37,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 19:35:37,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 19:35:37,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 19:35:37,158 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 101 [2018-11-28 19:35:37,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 19:35:37,158 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 19:35:37,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-28 19:35:37,158 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 19:35:37,158 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 19:35:37,163 INFO L305 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-11-28 19:35:37,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:35:37 BasicIcfg [2018-11-28 19:35:37,169 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 19:35:37,169 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 19:35:37,169 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 19:35:37,172 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 19:35:37,172 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:34:57" (3/4) ... [2018-11-28 19:35:37,178 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 19:35:37,186 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2018-11-28 19:35:37,187 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2018-11-28 19:35:37,192 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-11-28 19:35:37,192 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-28 19:35:37,192 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 19:35:37,236 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-11-28 19:35:37,237 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 19:35:37,237 INFO L168 Benchmark]: Toolchain (without parser) took 41169.19 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 489.7 MB). Free memory was 952.7 MB in the beginning and 911.4 MB in the end (delta: 41.3 MB). Peak memory consumption was 531.0 MB. Max. memory is 11.5 GB. [2018-11-28 19:35:37,238 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. [2018-11-28 19:35:37,239 INFO L168 Benchmark]: CACSL2BoogieTranslator took 815.85 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 952.7 MB in the beginning and 1.1 GB in the end (delta: -159.7 MB). Peak memory consumption was 32.3 MB. Max. memory is 11.5 GB. [2018-11-28 19:35:37,239 INFO L168 Benchmark]: Boogie Procedure Inliner took 66.86 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 19:35:37,242 INFO L168 Benchmark]: Boogie Preprocessor took 47.02 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 19:35:37,242 INFO L168 Benchmark]: RCFGBuilder took 594.34 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: 25.6 MB). Peak memory consumption was 25.6 MB. Max. memory is 11.5 GB. [2018-11-28 19:35:37,242 INFO L168 Benchmark]: TraceAbstraction took 39571.79 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 351.8 MB). Free memory was 1.1 GB in the beginning and 911.9 MB in the end (delta: 174.9 MB). Peak memory consumption was 526.7 MB. Max. memory is 11.5 GB. [2018-11-28 19:35:37,243 INFO L168 Benchmark]: Witness Printer took 67.24 ms. Allocated memory is still 1.5 GB. Free memory was 911.9 MB in the beginning and 911.4 MB in the end (delta: 515.3 kB). Peak memory consumption was 515.3 kB. Max. memory is 11.5 GB. [2018-11-28 19:35:37,246 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 815.85 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 952.7 MB in the beginning and 1.1 GB in the end (delta: -159.7 MB). Peak memory consumption was 32.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 66.86 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 47.02 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 594.34 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: 25.6 MB). Peak memory consumption was 25.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 39571.79 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 351.8 MB). Free memory was 1.1 GB in the beginning and 911.9 MB in the end (delta: 174.9 MB). Peak memory consumption was 526.7 MB. Max. memory is 11.5 GB. * Witness Printer took 67.24 ms. Allocated memory is still 1.5 GB. Free memory was 911.9 MB in the beginning and 911.4 MB in the end (delta: 515.3 kB). Peak memory consumption was 515.3 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 688]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 64 locations, 1 error locations. SAFE Result, 39.4s OverallTime, 42 OverallIterations, 11 TraceHistogramMax, 18.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2614 SDtfs, 11401 SDslu, 17333 SDs, 0 SdLazy, 3308 SolverSat, 1627 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3590 GetRequests, 2516 SyntacticMatches, 0 SemanticMatches, 1074 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6069 ImplicationChecksByTransitivity, 26.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1012occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 42 MinimizatonAttempts, 3088 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 17.0s InterpolantComputationTime, 5031 NumberOfCodeBlocks, 5031 NumberOfCodeBlocksAsserted, 197 NumberOfCheckSat, 4951 ConstructedInterpolants, 0 QuantifiedInterpolants, 1042555 SizeOfPredicates, 564 NumberOfNonLiveVariables, 6004 ConjunctsInSsa, 682 ConjunctsInUnsatCore, 80 InterpolantComputations, 6 PerfectInterpolantSequences, 1283/9160 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...