./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/loop-acceleration/nested_true-unreach-call1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2e94e6aa Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/svcomp/c/loop-acceleration/nested_true-unreach-call1.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 a5caa00ae79e87f00b53813a39ed64b4be57c6c3 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-2e94e6a [2018-12-31 05:58:12,952 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-31 05:58:12,954 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-31 05:58:12,965 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-31 05:58:12,966 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-31 05:58:12,967 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-31 05:58:12,968 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-31 05:58:12,970 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-31 05:58:12,972 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-31 05:58:12,973 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-31 05:58:12,974 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-31 05:58:12,974 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-31 05:58:12,975 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-31 05:58:12,976 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-31 05:58:12,977 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-31 05:58:12,978 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-31 05:58:12,979 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-31 05:58:12,981 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-31 05:58:12,983 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-31 05:58:12,985 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-31 05:58:12,986 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-31 05:58:12,988 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-31 05:58:12,990 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-31 05:58:12,990 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-31 05:58:12,991 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-31 05:58:12,992 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-31 05:58:12,993 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-31 05:58:12,994 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-31 05:58:12,995 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-31 05:58:12,996 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-31 05:58:12,996 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-31 05:58:12,997 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-31 05:58:12,998 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-31 05:58:12,998 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-31 05:58:12,999 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-31 05:58:13,000 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-31 05:58:13,000 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-31 05:58:13,016 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-31 05:58:13,016 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-31 05:58:13,017 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-31 05:58:13,017 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-31 05:58:13,018 INFO L133 SettingsManager]: * Use SBE=true [2018-12-31 05:58:13,018 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-31 05:58:13,018 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-31 05:58:13,018 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-31 05:58:13,018 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-31 05:58:13,019 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-31 05:58:13,019 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-31 05:58:13,020 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-31 05:58:13,020 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-31 05:58:13,020 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-31 05:58:13,020 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-31 05:58:13,020 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-31 05:58:13,020 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-31 05:58:13,021 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-31 05:58:13,021 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-31 05:58:13,021 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-31 05:58:13,021 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-31 05:58:13,021 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 05:58:13,021 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-31 05:58:13,023 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-31 05:58:13,023 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-31 05:58:13,023 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-31 05:58:13,023 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-31 05:58:13,024 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-31 05:58:13,024 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 -> a5caa00ae79e87f00b53813a39ed64b4be57c6c3 [2018-12-31 05:58:13,083 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-31 05:58:13,100 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-31 05:58:13,106 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-31 05:58:13,109 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-31 05:58:13,109 INFO L276 PluginConnector]: CDTParser initialized [2018-12-31 05:58:13,110 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/loop-acceleration/nested_true-unreach-call1.i [2018-12-31 05:58:13,167 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ae0dfddd/eb73fe4452c94eaf9be7e6a12cc8bd1c/FLAG278661014 [2018-12-31 05:58:13,595 INFO L307 CDTParser]: Found 1 translation units. [2018-12-31 05:58:13,596 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/loop-acceleration/nested_true-unreach-call1.i [2018-12-31 05:58:13,602 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ae0dfddd/eb73fe4452c94eaf9be7e6a12cc8bd1c/FLAG278661014 [2018-12-31 05:58:13,967 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ae0dfddd/eb73fe4452c94eaf9be7e6a12cc8bd1c [2018-12-31 05:58:13,972 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-31 05:58:13,974 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-31 05:58:13,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-31 05:58:13,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-31 05:58:13,983 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-31 05:58:13,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 05:58:13" (1/1) ... [2018-12-31 05:58:13,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@660e9c7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:58:13, skipping insertion in model container [2018-12-31 05:58:13,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 05:58:13" (1/1) ... [2018-12-31 05:58:13,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-31 05:58:14,017 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-31 05:58:14,250 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 05:58:14,257 INFO L191 MainTranslator]: Completed pre-run [2018-12-31 05:58:14,277 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 05:58:14,300 INFO L195 MainTranslator]: Completed translation [2018-12-31 05:58:14,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:58:14 WrapperNode [2018-12-31 05:58:14,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-31 05:58:14,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-31 05:58:14,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-31 05:58:14,305 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-31 05:58:14,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:58:14" (1/1) ... [2018-12-31 05:58:14,320 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:58:14" (1/1) ... [2018-12-31 05:58:14,343 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-31 05:58:14,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-31 05:58:14,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-31 05:58:14,344 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-31 05:58:14,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:58:14" (1/1) ... [2018-12-31 05:58:14,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:58:14" (1/1) ... [2018-12-31 05:58:14,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:58:14" (1/1) ... [2018-12-31 05:58:14,355 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:58:14" (1/1) ... [2018-12-31 05:58:14,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:58:14" (1/1) ... [2018-12-31 05:58:14,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:58:14" (1/1) ... [2018-12-31 05:58:14,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:58:14" (1/1) ... [2018-12-31 05:58:14,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-31 05:58:14,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-31 05:58:14,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-31 05:58:14,366 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-31 05:58:14,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:58:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 05:58:14,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-31 05:58:14,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-31 05:58:14,658 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-31 05:58:14,658 INFO L280 CfgBuilder]: Removed 8 assue(true) statements. [2018-12-31 05:58:14,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 05:58:14 BoogieIcfgContainer [2018-12-31 05:58:14,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-31 05:58:14,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-31 05:58:14,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-31 05:58:14,664 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-31 05:58:14,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.12 05:58:13" (1/3) ... [2018-12-31 05:58:14,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5471c633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 05:58:14, skipping insertion in model container [2018-12-31 05:58:14,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:58:14" (2/3) ... [2018-12-31 05:58:14,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5471c633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 05:58:14, skipping insertion in model container [2018-12-31 05:58:14,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 05:58:14" (3/3) ... [2018-12-31 05:58:14,667 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_true-unreach-call1.i [2018-12-31 05:58:14,677 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-31 05:58:14,684 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-31 05:58:14,703 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-31 05:58:14,736 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-31 05:58:14,737 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-31 05:58:14,737 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-31 05:58:14,737 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-31 05:58:14,737 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-31 05:58:14,737 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-31 05:58:14,738 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-31 05:58:14,738 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-31 05:58:14,738 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-31 05:58:14,753 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2018-12-31 05:58:14,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-31 05:58:14,760 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:58:14,761 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-31 05:58:14,764 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:58:14,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:58:14,770 INFO L82 PathProgramCache]: Analyzing trace with hash 29817909, now seen corresponding path program 1 times [2018-12-31 05:58:14,772 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:58:14,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:58:14,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:14,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 05:58:14,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:58:15,124 WARN L181 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2018-12-31 05:58:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:58:15,134 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 05:58:15,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-31 05:58:15,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-31 05:58:15,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-31 05:58:15,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-31 05:58:15,156 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2018-12-31 05:58:15,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:58:15,211 INFO L93 Difference]: Finished difference Result 24 states and 36 transitions. [2018-12-31 05:58:15,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-31 05:58:15,213 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-12-31 05:58:15,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:58:15,223 INFO L225 Difference]: With dead ends: 24 [2018-12-31 05:58:15,224 INFO L226 Difference]: Without dead ends: 11 [2018-12-31 05:58:15,227 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-31 05:58:15,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-12-31 05:58:15,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2018-12-31 05:58:15,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-31 05:58:15,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-12-31 05:58:15,262 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2018-12-31 05:58:15,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:58:15,262 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-12-31 05:58:15,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-31 05:58:15,263 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-12-31 05:58:15,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-31 05:58:15,263 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:58:15,263 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 05:58:15,264 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:58:15,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:58:15,264 INFO L82 PathProgramCache]: Analyzing trace with hash 728659877, now seen corresponding path program 1 times [2018-12-31 05:58:15,264 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:58:15,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:58:15,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:15,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 05:58:15,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:58:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:58:15,369 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 05:58:15,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-31 05:58:15,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-31 05:58:15,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-31 05:58:15,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-31 05:58:15,373 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2018-12-31 05:58:15,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:58:15,425 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2018-12-31 05:58:15,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-31 05:58:15,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-12-31 05:58:15,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:58:15,427 INFO L225 Difference]: With dead ends: 17 [2018-12-31 05:58:15,427 INFO L226 Difference]: Without dead ends: 10 [2018-12-31 05:58:15,428 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-31 05:58:15,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-12-31 05:58:15,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-12-31 05:58:15,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-12-31 05:58:15,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-12-31 05:58:15,432 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2018-12-31 05:58:15,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:58:15,433 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-12-31 05:58:15,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-31 05:58:15,433 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2018-12-31 05:58:15,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-31 05:58:15,433 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:58:15,435 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 05:58:15,435 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:58:15,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:58:15,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1564831260, now seen corresponding path program 1 times [2018-12-31 05:58:15,435 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:58:15,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:58:15,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:15,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 05:58:15,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:58:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:58:15,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:58:15,592 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 05:58:15,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 05:58:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:58:15,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:58:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:58:15,827 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:58:15,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-12-31 05:58:15,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-31 05:58:15,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-31 05:58:15,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-12-31 05:58:15,829 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 7 states. [2018-12-31 05:58:16,078 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-12-31 05:58:16,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:58:16,197 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2018-12-31 05:58:16,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-31 05:58:16,198 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2018-12-31 05:58:16,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:58:16,200 INFO L225 Difference]: With dead ends: 28 [2018-12-31 05:58:16,200 INFO L226 Difference]: Without dead ends: 20 [2018-12-31 05:58:16,201 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-12-31 05:58:16,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-31 05:58:16,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2018-12-31 05:58:16,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-31 05:58:16,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-12-31 05:58:16,206 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2018-12-31 05:58:16,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:58:16,206 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-12-31 05:58:16,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-31 05:58:16,206 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-12-31 05:58:16,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-31 05:58:16,207 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:58:16,207 INFO L402 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1] [2018-12-31 05:58:16,207 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:58:16,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:58:16,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1249079755, now seen corresponding path program 2 times [2018-12-31 05:58:16,208 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:58:16,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:58:16,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:16,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 05:58:16,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:58:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-31 05:58:16,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:58:16,339 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 05:58:16,353 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 05:58:16,371 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 05:58:16,372 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 05:58:16,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:58:16,527 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-31 05:58:16,545 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:58:16,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-12-31 05:58:16,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-31 05:58:16,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-31 05:58:16,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-12-31 05:58:16,548 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2018-12-31 05:58:17,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:58:17,237 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2018-12-31 05:58:17,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-31 05:58:17,240 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-12-31 05:58:17,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:58:17,240 INFO L225 Difference]: With dead ends: 40 [2018-12-31 05:58:17,241 INFO L226 Difference]: Without dead ends: 29 [2018-12-31 05:58:17,241 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2018-12-31 05:58:17,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-31 05:58:17,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2018-12-31 05:58:17,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-31 05:58:17,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2018-12-31 05:58:17,249 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2018-12-31 05:58:17,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:58:17,249 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2018-12-31 05:58:17,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-31 05:58:17,250 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2018-12-31 05:58:17,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-31 05:58:17,250 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:58:17,251 INFO L402 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 1, 1, 1, 1, 1] [2018-12-31 05:58:17,251 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:58:17,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:58:17,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1525597154, now seen corresponding path program 3 times [2018-12-31 05:58:17,251 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:58:17,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:58:17,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:17,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 05:58:17,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:17,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:58:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-12-31 05:58:17,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:58:17,406 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 05:58:17,416 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 05:58:17,451 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-31 05:58:17,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 05:58:17,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:58:17,503 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-12-31 05:58:17,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:58:17,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-12-31 05:58:17,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-31 05:58:17,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-31 05:58:17,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-12-31 05:58:17,524 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 7 states. [2018-12-31 05:58:17,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:58:17,587 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2018-12-31 05:58:17,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-31 05:58:17,588 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-12-31 05:58:17,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:58:17,589 INFO L225 Difference]: With dead ends: 45 [2018-12-31 05:58:17,589 INFO L226 Difference]: Without dead ends: 27 [2018-12-31 05:58:17,592 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-12-31 05:58:17,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-31 05:58:17,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-12-31 05:58:17,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-31 05:58:17,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2018-12-31 05:58:17,599 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2018-12-31 05:58:17,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:58:17,599 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2018-12-31 05:58:17,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-31 05:58:17,600 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2018-12-31 05:58:17,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-31 05:58:17,600 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:58:17,602 INFO L402 BasicCegarLoop]: trace histogram [12, 3, 3, 3, 1, 1, 1, 1, 1] [2018-12-31 05:58:17,602 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:58:17,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:58:17,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1967539557, now seen corresponding path program 4 times [2018-12-31 05:58:17,603 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:58:17,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:58:17,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:17,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 05:58:17,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:17,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:58:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-12-31 05:58:18,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:58:18,111 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 05:58:18,126 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 05:58:18,156 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 05:58:18,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 05:58:18,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:58:18,332 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-31 05:58:18,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:58:18,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 10 [2018-12-31 05:58:18,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-31 05:58:18,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-31 05:58:18,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-12-31 05:58:18,356 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 11 states. [2018-12-31 05:58:18,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:58:18,524 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2018-12-31 05:58:18,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-31 05:58:18,526 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2018-12-31 05:58:18,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:58:18,528 INFO L225 Difference]: With dead ends: 44 [2018-12-31 05:58:18,528 INFO L226 Difference]: Without dead ends: 40 [2018-12-31 05:58:18,528 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-12-31 05:58:18,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-12-31 05:58:18,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2018-12-31 05:58:18,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-31 05:58:18,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-12-31 05:58:18,539 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 26 [2018-12-31 05:58:18,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:58:18,540 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2018-12-31 05:58:18,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-31 05:58:18,540 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2018-12-31 05:58:18,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-31 05:58:18,541 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:58:18,541 INFO L402 BasicCegarLoop]: trace histogram [16, 4, 4, 4, 1, 1, 1, 1, 1] [2018-12-31 05:58:18,542 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:58:18,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:58:18,542 INFO L82 PathProgramCache]: Analyzing trace with hash -899182539, now seen corresponding path program 5 times [2018-12-31 05:58:18,542 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:58:18,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:58:18,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:18,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 05:58:18,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:58:18,984 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-31 05:58:18,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:58:18,984 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 05:58:18,996 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 05:58:19,041 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-12-31 05:58:19,041 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 05:58:19,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:58:19,116 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 134 proven. 10 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-12-31 05:58:19,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:58:19,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2018-12-31 05:58:19,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-31 05:58:19,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-31 05:58:19,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2018-12-31 05:58:19,137 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 12 states. [2018-12-31 05:58:19,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:58:19,964 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2018-12-31 05:58:19,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-12-31 05:58:19,966 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2018-12-31 05:58:19,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:58:19,967 INFO L225 Difference]: With dead ends: 80 [2018-12-31 05:58:19,967 INFO L226 Difference]: Without dead ends: 53 [2018-12-31 05:58:19,969 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2018-12-31 05:58:19,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-31 05:58:19,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2018-12-31 05:58:19,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-12-31 05:58:19,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2018-12-31 05:58:19,981 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 33 [2018-12-31 05:58:19,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:58:19,981 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2018-12-31 05:58:19,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-31 05:58:19,981 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2018-12-31 05:58:19,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-31 05:58:19,983 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:58:19,983 INFO L402 BasicCegarLoop]: trace histogram [25, 5, 5, 5, 1, 1, 1, 1, 1] [2018-12-31 05:58:19,983 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:58:19,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:58:19,984 INFO L82 PathProgramCache]: Analyzing trace with hash -541355040, now seen corresponding path program 6 times [2018-12-31 05:58:19,984 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:58:19,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:58:19,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:19,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 05:58:19,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:58:20,176 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-12-31 05:58:20,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:58:20,177 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 05:58:20,206 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 05:58:20,464 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-12-31 05:58:20,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 05:58:20,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:58:20,551 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 264 proven. 15 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-12-31 05:58:20,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:58:20,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-12-31 05:58:20,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-31 05:58:20,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-31 05:58:20,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-12-31 05:58:20,572 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 14 states. [2018-12-31 05:58:22,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:58:22,323 INFO L93 Difference]: Finished difference Result 106 states and 125 transitions. [2018-12-31 05:58:22,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-12-31 05:58:22,326 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2018-12-31 05:58:22,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:58:22,327 INFO L225 Difference]: With dead ends: 106 [2018-12-31 05:58:22,327 INFO L226 Difference]: Without dead ends: 68 [2018-12-31 05:58:22,329 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=234, Invalid=2216, Unknown=0, NotChecked=0, Total=2450 [2018-12-31 05:58:22,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-31 05:58:22,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2018-12-31 05:58:22,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-12-31 05:58:22,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2018-12-31 05:58:22,342 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 45 [2018-12-31 05:58:22,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:58:22,343 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2018-12-31 05:58:22,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-31 05:58:22,343 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2018-12-31 05:58:22,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-12-31 05:58:22,344 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:58:22,345 INFO L402 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 1, 1, 1, 1, 1] [2018-12-31 05:58:22,345 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:58:22,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:58:22,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1076613685, now seen corresponding path program 7 times [2018-12-31 05:58:22,345 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:58:22,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:58:22,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:22,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 05:58:22,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:58:23,295 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 771 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-12-31 05:58:23,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:58:23,295 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 05:58:23,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 05:58:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:58:23,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:58:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 792 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-12-31 05:58:23,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:58:23,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 15 [2018-12-31 05:58:23,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-31 05:58:23,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-31 05:58:23,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2018-12-31 05:58:23,706 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 16 states. [2018-12-31 05:58:24,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:58:24,282 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2018-12-31 05:58:24,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-31 05:58:24,283 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2018-12-31 05:58:24,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:58:24,285 INFO L225 Difference]: With dead ends: 81 [2018-12-31 05:58:24,285 INFO L226 Difference]: Without dead ends: 77 [2018-12-31 05:58:24,285 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2018-12-31 05:58:24,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-12-31 05:58:24,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2018-12-31 05:58:24,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-12-31 05:58:24,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2018-12-31 05:58:24,301 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 59 [2018-12-31 05:58:24,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:58:24,301 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2018-12-31 05:58:24,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-31 05:58:24,302 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2018-12-31 05:58:24,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-12-31 05:58:24,303 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:58:24,304 INFO L402 BasicCegarLoop]: trace histogram [42, 7, 7, 7, 1, 1, 1, 1, 1] [2018-12-31 05:58:24,304 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:58:24,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:58:24,304 INFO L82 PathProgramCache]: Analyzing trace with hash 642437445, now seen corresponding path program 8 times [2018-12-31 05:58:24,304 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:58:24,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:58:24,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:24,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 05:58:24,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:58:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1078 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2018-12-31 05:58:24,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:58:24,551 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 05:58:24,562 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 05:58:24,607 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 05:58:24,607 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 05:58:24,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:58:24,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1078 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2018-12-31 05:58:24,770 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:58:24,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-12-31 05:58:24,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-31 05:58:24,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-31 05:58:24,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-12-31 05:58:24,771 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand 11 states. [2018-12-31 05:58:25,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:58:25,033 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2018-12-31 05:58:25,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-31 05:58:25,034 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2018-12-31 05:58:25,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:58:25,036 INFO L225 Difference]: With dead ends: 90 [2018-12-31 05:58:25,036 INFO L226 Difference]: Without dead ends: 86 [2018-12-31 05:58:25,037 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-12-31 05:58:25,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-12-31 05:58:25,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2018-12-31 05:58:25,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-12-31 05:58:25,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2018-12-31 05:58:25,062 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 68 [2018-12-31 05:58:25,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:58:25,063 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2018-12-31 05:58:25,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-31 05:58:25,063 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2018-12-31 05:58:25,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-12-31 05:58:25,065 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:58:25,066 INFO L402 BasicCegarLoop]: trace histogram [48, 8, 8, 8, 1, 1, 1, 1, 1] [2018-12-31 05:58:25,067 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:58:25,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:58:25,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1372470219, now seen corresponding path program 9 times [2018-12-31 05:58:25,067 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:58:25,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:58:25,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:25,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 05:58:25,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:58:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1604 backedges. 0 proven. 1436 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2018-12-31 05:58:25,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:58:25,521 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 05:58:25,531 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 05:58:25,611 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-31 05:58:25,611 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 05:58:25,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:58:25,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1604 backedges. 358 proven. 21 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2018-12-31 05:58:25,755 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:58:25,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2018-12-31 05:58:25,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-31 05:58:25,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-31 05:58:25,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2018-12-31 05:58:25,757 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand 18 states. [2018-12-31 05:58:27,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:58:27,561 INFO L93 Difference]: Finished difference Result 174 states and 202 transitions. [2018-12-31 05:58:27,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-12-31 05:58:27,561 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 77 [2018-12-31 05:58:27,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:58:27,563 INFO L225 Difference]: With dead ends: 174 [2018-12-31 05:58:27,563 INFO L226 Difference]: Without dead ends: 105 [2018-12-31 05:58:27,567 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1960 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=405, Invalid=6075, Unknown=0, NotChecked=0, Total=6480 [2018-12-31 05:58:27,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-12-31 05:58:27,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 96. [2018-12-31 05:58:27,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-12-31 05:58:27,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2018-12-31 05:58:27,586 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 77 [2018-12-31 05:58:27,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:58:27,586 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2018-12-31 05:58:27,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-31 05:58:27,587 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2018-12-31 05:58:27,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-12-31 05:58:27,588 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:58:27,588 INFO L402 BasicCegarLoop]: trace histogram [63, 9, 9, 9, 1, 1, 1, 1, 1] [2018-12-31 05:58:27,588 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:58:27,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:58:27,589 INFO L82 PathProgramCache]: Analyzing trace with hash -163007556, now seen corresponding path program 10 times [2018-12-31 05:58:27,589 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:58:27,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:58:27,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:27,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 05:58:27,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:58:27,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2637 backedges. 0 proven. 2385 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-12-31 05:58:27,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:58:27,859 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 05:58:27,869 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 05:58:27,916 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 05:58:27,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 05:58:27,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:58:28,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2637 backedges. 521 proven. 28 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2018-12-31 05:58:28,075 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:58:28,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-12-31 05:58:28,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-31 05:58:28,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-31 05:58:28,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2018-12-31 05:58:28,076 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand 20 states. [2018-12-31 05:58:31,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:58:31,153 INFO L93 Difference]: Finished difference Result 212 states and 243 transitions. [2018-12-31 05:58:31,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-12-31 05:58:31,154 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 95 [2018-12-31 05:58:31,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:58:31,156 INFO L225 Difference]: With dead ends: 212 [2018-12-31 05:58:31,156 INFO L226 Difference]: Without dead ends: 126 [2018-12-31 05:58:31,161 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3168 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=510, Invalid=9390, Unknown=0, NotChecked=0, Total=9900 [2018-12-31 05:58:31,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-12-31 05:58:31,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2018-12-31 05:58:31,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-12-31 05:58:31,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2018-12-31 05:58:31,185 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 95 [2018-12-31 05:58:31,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:58:31,185 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2018-12-31 05:58:31,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-31 05:58:31,186 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2018-12-31 05:58:31,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-12-31 05:58:31,189 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:58:31,189 INFO L402 BasicCegarLoop]: trace histogram [80, 10, 10, 10, 1, 1, 1, 1, 1] [2018-12-31 05:58:31,189 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:58:31,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:58:31,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1037037109, now seen corresponding path program 11 times [2018-12-31 05:58:31,190 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:58:31,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:58:31,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:31,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 05:58:31,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:58:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4105 backedges. 0 proven. 3745 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2018-12-31 05:58:31,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:58:31,592 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 05:58:31,602 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 05:58:31,685 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-12-31 05:58:31,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 05:58:31,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:58:31,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4105 backedges. 2236 proven. 36 refuted. 0 times theorem prover too weak. 1833 trivial. 0 not checked. [2018-12-31 05:58:31,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:58:31,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2018-12-31 05:58:31,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-31 05:58:31,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-31 05:58:31,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2018-12-31 05:58:31,884 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand 22 states. [2018-12-31 05:58:36,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:58:36,252 INFO L93 Difference]: Finished difference Result 254 states and 288 transitions. [2018-12-31 05:58:36,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-12-31 05:58:36,254 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2018-12-31 05:58:36,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:58:36,255 INFO L225 Difference]: With dead ends: 254 [2018-12-31 05:58:36,255 INFO L226 Difference]: Without dead ends: 149 [2018-12-31 05:58:36,260 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4860 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=627, Invalid=13893, Unknown=0, NotChecked=0, Total=14520 [2018-12-31 05:58:36,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-12-31 05:58:36,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 138. [2018-12-31 05:58:36,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-12-31 05:58:36,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 149 transitions. [2018-12-31 05:58:36,284 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 149 transitions. Word has length 115 [2018-12-31 05:58:36,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:58:36,284 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 149 transitions. [2018-12-31 05:58:36,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-31 05:58:36,284 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 149 transitions. [2018-12-31 05:58:36,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-12-31 05:58:36,286 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:58:36,286 INFO L402 BasicCegarLoop]: trace histogram [99, 11, 11, 11, 1, 1, 1, 1, 1] [2018-12-31 05:58:36,286 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:58:36,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:58:36,286 INFO L82 PathProgramCache]: Analyzing trace with hash -313740614, now seen corresponding path program 12 times [2018-12-31 05:58:36,287 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:58:36,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:58:36,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:36,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 05:58:36,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:58:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6116 backedges. 0 proven. 5621 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-12-31 05:58:37,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:58:37,237 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 05:58:37,246 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 05:58:39,346 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-12-31 05:58:39,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 05:58:39,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:58:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6116 backedges. 3156 proven. 45 refuted. 0 times theorem prover too weak. 2915 trivial. 0 not checked. [2018-12-31 05:58:39,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:58:39,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2018-12-31 05:58:39,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-31 05:58:39,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-31 05:58:39,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2018-12-31 05:58:39,572 INFO L87 Difference]: Start difference. First operand 138 states and 149 transitions. Second operand 24 states. [2018-12-31 05:58:43,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:58:43,599 INFO L93 Difference]: Finished difference Result 300 states and 337 transitions. [2018-12-31 05:58:43,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-12-31 05:58:43,599 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 137 [2018-12-31 05:58:43,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:58:43,600 INFO L225 Difference]: With dead ends: 300 [2018-12-31 05:58:43,601 INFO L226 Difference]: Without dead ends: 174 [2018-12-31 05:58:43,606 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7150 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=756, Invalid=19836, Unknown=0, NotChecked=0, Total=20592 [2018-12-31 05:58:43,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-12-31 05:58:43,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 162. [2018-12-31 05:58:43,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-12-31 05:58:43,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 174 transitions. [2018-12-31 05:58:43,627 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 174 transitions. Word has length 137 [2018-12-31 05:58:43,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:58:43,628 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 174 transitions. [2018-12-31 05:58:43,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-31 05:58:43,628 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 174 transitions. [2018-12-31 05:58:43,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-12-31 05:58:43,629 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:58:43,629 INFO L402 BasicCegarLoop]: trace histogram [120, 12, 12, 12, 1, 1, 1, 1, 1] [2018-12-31 05:58:43,630 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:58:43,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:58:43,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2096097333, now seen corresponding path program 13 times [2018-12-31 05:58:43,630 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:58:43,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:58:43,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:43,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 05:58:43,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:58:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8790 backedges. 0 proven. 8130 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-12-31 05:58:44,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:58:44,168 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 05:58:44,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 05:58:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:58:44,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:58:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8790 backedges. 0 proven. 8130 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-12-31 05:58:44,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:58:44,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-12-31 05:58:44,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-31 05:58:44,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-31 05:58:44,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-12-31 05:58:44,469 INFO L87 Difference]: Start difference. First operand 162 states and 174 transitions. Second operand 16 states. [2018-12-31 05:58:44,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:58:44,743 INFO L93 Difference]: Finished difference Result 191 states and 205 transitions. [2018-12-31 05:58:44,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-31 05:58:44,744 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 161 [2018-12-31 05:58:44,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:58:44,746 INFO L225 Difference]: With dead ends: 191 [2018-12-31 05:58:44,746 INFO L226 Difference]: Without dead ends: 187 [2018-12-31 05:58:44,746 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 159 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-12-31 05:58:44,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-12-31 05:58:44,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 175. [2018-12-31 05:58:44,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-12-31 05:58:44,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 188 transitions. [2018-12-31 05:58:44,770 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 188 transitions. Word has length 161 [2018-12-31 05:58:44,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:58:44,771 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 188 transitions. [2018-12-31 05:58:44,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-31 05:58:44,771 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 188 transitions. [2018-12-31 05:58:44,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-12-31 05:58:44,773 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:58:44,773 INFO L402 BasicCegarLoop]: trace histogram [130, 13, 13, 13, 1, 1, 1, 1, 1] [2018-12-31 05:58:44,773 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:58:44,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:58:44,774 INFO L82 PathProgramCache]: Analyzing trace with hash 2007548677, now seen corresponding path program 14 times [2018-12-31 05:58:44,774 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:58:44,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:58:44,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:44,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 05:58:44,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:58:45,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 0 proven. 9607 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2018-12-31 05:58:45,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:58:45,724 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 05:58:45,734 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 05:58:45,822 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 05:58:45,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 05:58:45,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:58:45,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 0 proven. 9607 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2018-12-31 05:58:45,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:58:45,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-12-31 05:58:45,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-31 05:58:45,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-31 05:58:45,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-12-31 05:58:45,974 INFO L87 Difference]: Start difference. First operand 175 states and 188 transitions. Second operand 17 states. [2018-12-31 05:58:46,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:58:46,314 INFO L93 Difference]: Finished difference Result 204 states and 219 transitions. [2018-12-31 05:58:46,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-31 05:58:46,315 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 174 [2018-12-31 05:58:46,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:58:46,317 INFO L225 Difference]: With dead ends: 204 [2018-12-31 05:58:46,317 INFO L226 Difference]: Without dead ends: 200 [2018-12-31 05:58:46,317 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-12-31 05:58:46,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-12-31 05:58:46,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 188. [2018-12-31 05:58:46,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-12-31 05:58:46,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 202 transitions. [2018-12-31 05:58:46,345 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 202 transitions. Word has length 174 [2018-12-31 05:58:46,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:58:46,345 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 202 transitions. [2018-12-31 05:58:46,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-31 05:58:46,345 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 202 transitions. [2018-12-31 05:58:46,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-12-31 05:58:46,347 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:58:46,347 INFO L402 BasicCegarLoop]: trace histogram [140, 14, 14, 14, 1, 1, 1, 1, 1] [2018-12-31 05:58:46,348 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:58:46,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:58:46,348 INFO L82 PathProgramCache]: Analyzing trace with hash 165018165, now seen corresponding path program 15 times [2018-12-31 05:58:46,348 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:58:46,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:58:46,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:46,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 05:58:46,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:58:46,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:58:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 11977 backedges. 0 proven. 11207 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-12-31 05:58:46,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:58:46,985 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 05:58:46,995 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 05:58:47,923 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-12-31 05:58:47,923 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 05:58:47,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:59:00,665 WARN L181 SmtUtils]: Spent 8.33 s on a formula simplification. DAG size of input: 90 DAG size of output: 19 [2018-12-31 05:59:00,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11977 backedges. 1600 proven. 0 refuted. 0 times theorem prover too weak. 10377 trivial. 0 not checked. [2018-12-31 05:59:00,736 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-31 05:59:00,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [16] total 21 [2018-12-31 05:59:00,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-31 05:59:00,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-31 05:59:00,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=337, Unknown=1, NotChecked=0, Total=420 [2018-12-31 05:59:00,739 INFO L87 Difference]: Start difference. First operand 188 states and 202 transitions. Second operand 21 states. [2018-12-31 05:59:02,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:59:02,094 INFO L93 Difference]: Finished difference Result 216 states and 234 transitions. [2018-12-31 05:59:02,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-31 05:59:02,094 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 187 [2018-12-31 05:59:02,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:59:02,095 INFO L225 Difference]: With dead ends: 216 [2018-12-31 05:59:02,095 INFO L226 Difference]: Without dead ends: 0 [2018-12-31 05:59:02,096 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=123, Invalid=428, Unknown=1, NotChecked=0, Total=552 [2018-12-31 05:59:02,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-31 05:59:02,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-31 05:59:02,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-31 05:59:02,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-31 05:59:02,096 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 187 [2018-12-31 05:59:02,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:59:02,097 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-31 05:59:02,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-31 05:59:02,097 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-31 05:59:02,097 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-31 05:59:02,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-31 05:59:02,762 WARN L181 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 478 DAG size of output: 75 [2018-12-31 05:59:03,417 WARN L181 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 15 [2018-12-31 05:59:03,647 WARN L181 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 14 [2018-12-31 05:59:03,650 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-31 05:59:03,650 INFO L444 ceAbstractionStarter]: At program point L13-2(lines 13 15) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~x~0 0) (<= 0 ULTIMATE.start_main_~x~0)) (and (< (mod (+ ULTIMATE.start_main_~x~0 4294967295) 4294967296) 268435455) (< (mod ULTIMATE.start_main_~x~0 4294967296) 268435455))) [2018-12-31 05:59:03,650 INFO L448 ceAbstractionStarter]: For program point L13-3(lines 13 15) no Hoare annotation was computed. [2018-12-31 05:59:03,650 INFO L444 ceAbstractionStarter]: At program point L11-2(lines 11 17) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~x~0 0) (= ULTIMATE.start_main_~y~0 0) (<= 0 ULTIMATE.start_main_~x~0)) (< (mod (+ ULTIMATE.start_main_~x~0 4294967295) 4294967296) 268435455)) [2018-12-31 05:59:03,651 INFO L448 ceAbstractionStarter]: For program point L11-3(lines 11 17) no Hoare annotation was computed. [2018-12-31 05:59:03,652 INFO L448 ceAbstractionStarter]: For program point L3(lines 3 5) no Hoare annotation was computed. [2018-12-31 05:59:03,652 INFO L451 ceAbstractionStarter]: At program point L3-2(lines 1 19) the Hoare annotation is: true [2018-12-31 05:59:03,652 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2018-12-31 05:59:03,653 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2018-12-31 05:59:03,653 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-31 05:59:03,653 INFO L448 ceAbstractionStarter]: For program point L4(line 4) no Hoare annotation was computed. [2018-12-31 05:59:03,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.12 05:59:03 BoogieIcfgContainer [2018-12-31 05:59:03,674 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-31 05:59:03,674 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-31 05:59:03,674 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-31 05:59:03,674 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-31 05:59:03,675 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 05:58:14" (3/4) ... [2018-12-31 05:59:03,681 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-31 05:59:03,696 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2018-12-31 05:59:03,697 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-31 05:59:03,768 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-12-31 05:59:03,769 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-31 05:59:03,770 INFO L168 Benchmark]: Toolchain (without parser) took 49797.11 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 394.8 MB). Free memory was 942.0 MB in the beginning and 957.4 MB in the end (delta: -15.4 MB). Peak memory consumption was 379.4 MB. Max. memory is 11.5 GB. [2018-12-31 05:59:03,772 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 05:59:03,773 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.15 ms. Allocated memory is still 1.0 GB. Free memory was 942.0 MB in the beginning and 931.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-31 05:59:03,775 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.23 ms. Allocated memory is still 1.0 GB. Free memory is still 931.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 05:59:03,775 INFO L168 Benchmark]: Boogie Preprocessor took 21.94 ms. Allocated memory is still 1.0 GB. Free memory is still 931.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 05:59:03,776 INFO L168 Benchmark]: RCFGBuilder took 292.71 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.5 MB). Free memory was 931.2 MB in the beginning and 1.1 GB in the end (delta: -158.3 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-12-31 05:59:03,776 INFO L168 Benchmark]: TraceAbstraction took 49014.22 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 276.3 MB). Free memory was 1.1 GB in the beginning and 957.4 MB in the end (delta: 132.1 MB). Peak memory consumption was 408.4 MB. Max. memory is 11.5 GB. [2018-12-31 05:59:03,777 INFO L168 Benchmark]: Witness Printer took 95.13 ms. Allocated memory is still 1.4 GB. Free memory is still 957.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 05:59:03,780 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 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 327.15 ms. Allocated memory is still 1.0 GB. Free memory was 942.0 MB in the beginning and 931.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 40.23 ms. Allocated memory is still 1.0 GB. Free memory is still 931.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.94 ms. Allocated memory is still 1.0 GB. Free memory is still 931.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 292.71 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.5 MB). Free memory was 931.2 MB in the beginning and 1.1 GB in the end (delta: -158.3 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 49014.22 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 276.3 MB). Free memory was 1.1 GB in the beginning and 957.4 MB in the end (delta: 132.1 MB). Peak memory consumption was 408.4 MB. Max. memory is 11.5 GB. * Witness Printer took 95.13 ms. Allocated memory is still 1.4 GB. Free memory is still 957.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: 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 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: (x <= 0 && 0 <= x) || ((x + 4294967295) % 4294967296 < 268435455 && x % 4294967296 < 268435455) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: ((x <= 0 && y == 0) && 0 <= x) || (x + 4294967295) % 4294967296 < 268435455 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. SAFE Result, 48.9s OverallTime, 17 OverallIterations, 140 TraceHistogramMax, 20.1s AutomataDifference, 0.0s DeadEndRemovalTime, 1.5s HoareAnnotationTime, HoareTripleCheckerStatistics: 262 SDtfs, 401 SDslu, 2092 SDs, 0 SdLazy, 10408 SolverSat, 581 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1808 GetRequests, 1155 SyntacticMatches, 19 SemanticMatches, 634 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18184 ImplicationChecksByTransitivity, 29.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=188occurred in iteration=16, 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: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 114 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 197 NumberOfFragments, 40 HoareAnnotationTreeSize, 3 FomulaSimplifications, 1949749 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 3 FomulaSimplificationsInter, 263 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 4.1s SatisfiabilityAnalysisTime, 21.6s InterpolantComputationTime, 2461 NumberOfCodeBlocks, 2043 NumberOfCodeBlocksAsserted, 102 NumberOfCheckSat, 2429 ConstructedInterpolants, 1 QuantifiedInterpolants, 1571009 SizeOfPredicates, 19 NumberOfNonLiveVariables, 2208 ConjunctsInSsa, 252 ConjunctsInUnsatCore, 32 InterpolantComputations, 3 PerfectInterpolantSequences, 32597/97099 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...