./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive-simple/fibo_2calls_5_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 91b1670e Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/svcomp/c/recursive-simple/fibo_2calls_5_true-unreach-call_true-termination.c -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 e6092b6e2bef07c2401a6d2b7c5ee309bc5dbc34 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-91b1670 [2018-11-28 18:51:58,566 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 18:51:58,567 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 18:51:58,582 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 18:51:58,582 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 18:51:58,584 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 18:51:58,588 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 18:51:58,590 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 18:51:58,593 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 18:51:58,593 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 18:51:58,596 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 18:51:58,596 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 18:51:58,597 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 18:51:58,598 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 18:51:58,599 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 18:51:58,601 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 18:51:58,602 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 18:51:58,611 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 18:51:58,613 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 18:51:58,616 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 18:51:58,618 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 18:51:58,621 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 18:51:58,623 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 18:51:58,623 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 18:51:58,624 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 18:51:58,624 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 18:51:58,626 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 18:51:58,626 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 18:51:58,627 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 18:51:58,628 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 18:51:58,628 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 18:51:58,629 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 18:51:58,629 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 18:51:58,629 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 18:51:58,630 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 18:51:58,631 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 18:51:58,632 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 18:51:58,651 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 18:51:58,652 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 18:51:58,652 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 18:51:58,652 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 18:51:58,654 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 18:51:58,654 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 18:51:58,654 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 18:51:58,655 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 18:51:58,655 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 18:51:58,655 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 18:51:58,655 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 18:51:58,655 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 18:51:58,657 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 18:51:58,657 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 18:51:58,657 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 18:51:58,657 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 18:51:58,657 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 18:51:58,657 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 18:51:58,658 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 18:51:58,658 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 18:51:58,658 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 18:51:58,658 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 18:51:58,658 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 18:51:58,660 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 18:51:58,660 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 18:51:58,660 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 18:51:58,660 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 18:51:58,660 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 18:51:58,661 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 18:51:58,661 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 18:51:58,661 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 -> e6092b6e2bef07c2401a6d2b7c5ee309bc5dbc34 [2018-11-28 18:51:58,701 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 18:51:58,714 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 18:51:58,718 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 18:51:58,719 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 18:51:58,720 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 18:51:58,720 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive-simple/fibo_2calls_5_true-unreach-call_true-termination.c [2018-11-28 18:51:58,776 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45fd9a2ad/d53a9e84469442dd867e20ad68e6a3fa/FLAG6289a262a [2018-11-28 18:51:59,213 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 18:51:59,215 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive-simple/fibo_2calls_5_true-unreach-call_true-termination.c [2018-11-28 18:51:59,222 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45fd9a2ad/d53a9e84469442dd867e20ad68e6a3fa/FLAG6289a262a [2018-11-28 18:51:59,563 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45fd9a2ad/d53a9e84469442dd867e20ad68e6a3fa [2018-11-28 18:51:59,567 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 18:51:59,568 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 18:51:59,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 18:51:59,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 18:51:59,573 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 18:51:59,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:51:59" (1/1) ... [2018-11-28 18:51:59,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@133e4d9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:59, skipping insertion in model container [2018-11-28 18:51:59,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:51:59" (1/1) ... [2018-11-28 18:51:59,586 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 18:51:59,605 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 18:51:59,774 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:51:59,778 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 18:51:59,798 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:51:59,814 INFO L195 MainTranslator]: Completed translation [2018-11-28 18:51:59,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:59 WrapperNode [2018-11-28 18:51:59,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 18:51:59,816 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 18:51:59,816 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 18:51:59,816 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 18:51:59,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:59" (1/1) ... [2018-11-28 18:51:59,832 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:59" (1/1) ... [2018-11-28 18:51:59,839 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 18:51:59,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 18:51:59,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 18:51:59,840 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 18:51:59,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:59" (1/1) ... [2018-11-28 18:51:59,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:59" (1/1) ... [2018-11-28 18:51:59,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:59" (1/1) ... [2018-11-28 18:51:59,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:59" (1/1) ... [2018-11-28 18:51:59,859 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:59" (1/1) ... [2018-11-28 18:51:59,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:59" (1/1) ... [2018-11-28 18:51:59,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:59" (1/1) ... [2018-11-28 18:51:59,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 18:51:59,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 18:51:59,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 18:51:59,866 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 18:51:59,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 18:52:00,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 18:52:00,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 18:52:00,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 18:52:00,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 18:52:00,033 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 18:52:00,033 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 18:52:00,033 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-11-28 18:52:00,034 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-11-28 18:52:00,035 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-11-28 18:52:00,035 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-11-28 18:52:00,387 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 18:52:00,387 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 18:52:00,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:52:00 BoogieIcfgContainer [2018-11-28 18:52:00,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 18:52:00,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 18:52:00,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 18:52:00,392 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 18:52:00,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 06:51:59" (1/3) ... [2018-11-28 18:52:00,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7947939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:52:00, skipping insertion in model container [2018-11-28 18:52:00,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:59" (2/3) ... [2018-11-28 18:52:00,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7947939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:52:00, skipping insertion in model container [2018-11-28 18:52:00,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:52:00" (3/3) ... [2018-11-28 18:52:00,396 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5_true-unreach-call_true-termination.c [2018-11-28 18:52:00,407 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 18:52:00,415 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 18:52:00,432 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 18:52:00,466 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 18:52:00,467 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 18:52:00,467 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 18:52:00,467 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 18:52:00,467 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 18:52:00,467 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 18:52:00,467 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 18:52:00,468 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 18:52:00,468 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 18:52:00,488 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-11-28 18:52:00,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-28 18:52:00,495 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:00,496 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:00,498 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:00,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:00,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-11-28 18:52:00,507 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:00,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:00,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:00,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:00,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:00,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:52:00,742 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:52:00,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 18:52:00,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 18:52:00,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 18:52:00,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:52:00,763 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-11-28 18:52:00,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:00,939 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-11-28 18:52:00,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 18:52:00,942 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-28 18:52:00,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:00,952 INFO L225 Difference]: With dead ends: 44 [2018-11-28 18:52:00,952 INFO L226 Difference]: Without dead ends: 30 [2018-11-28 18:52:00,956 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:52:00,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-28 18:52:01,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-28 18:52:01,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-28 18:52:01,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-28 18:52:01,005 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-11-28 18:52:01,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:01,005 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-28 18:52:01,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 18:52:01,007 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-28 18:52:01,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-28 18:52:01,010 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:01,010 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:01,011 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:01,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:01,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-11-28 18:52:01,011 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:01,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:01,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:01,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:01,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:52:01,103 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:52:01,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 18:52:01,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 18:52:01,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 18:52:01,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:52:01,108 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-11-28 18:52:01,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:01,403 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-11-28 18:52:01,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 18:52:01,404 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-28 18:52:01,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:01,405 INFO L225 Difference]: With dead ends: 36 [2018-11-28 18:52:01,406 INFO L226 Difference]: Without dead ends: 32 [2018-11-28 18:52:01,407 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:52:01,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-28 18:52:01,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-11-28 18:52:01,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-28 18:52:01,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-28 18:52:01,416 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-11-28 18:52:01,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:01,416 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-28 18:52:01,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 18:52:01,416 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-28 18:52:01,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-28 18:52:01,418 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:01,418 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:01,418 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:01,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:01,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-11-28 18:52:01,419 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:01,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:01,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:01,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:01,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 18:52:01,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:01,616 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:01,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:01,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 18:52:01,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:01,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2018-11-28 18:52:01,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 18:52:01,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 18:52:01,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-11-28 18:52:01,844 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2018-11-28 18:52:02,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:02,538 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2018-11-28 18:52:02,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 18:52:02,539 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2018-11-28 18:52:02,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:02,542 INFO L225 Difference]: With dead ends: 58 [2018-11-28 18:52:02,543 INFO L226 Difference]: Without dead ends: 34 [2018-11-28 18:52:02,546 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-11-28 18:52:02,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-28 18:52:02,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-11-28 18:52:02,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-28 18:52:02,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2018-11-28 18:52:02,567 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2018-11-28 18:52:02,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:02,568 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2018-11-28 18:52:02,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 18:52:02,568 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2018-11-28 18:52:02,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-28 18:52:02,575 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:02,575 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:02,575 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:02,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:02,576 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2018-11-28 18:52:02,576 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:02,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:02,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:02,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:02,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 18:52:02,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:02,706 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:02,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:02,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:02,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 18:52:02,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:02,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-28 18:52:02,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-28 18:52:02,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 18:52:02,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-28 18:52:02,812 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2018-11-28 18:52:03,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:03,033 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2018-11-28 18:52:03,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 18:52:03,034 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-11-28 18:52:03,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:03,036 INFO L225 Difference]: With dead ends: 43 [2018-11-28 18:52:03,037 INFO L226 Difference]: Without dead ends: 39 [2018-11-28 18:52:03,037 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-28 18:52:03,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-28 18:52:03,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-11-28 18:52:03,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-28 18:52:03,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2018-11-28 18:52:03,048 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2018-11-28 18:52:03,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:03,048 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2018-11-28 18:52:03,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-28 18:52:03,049 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2018-11-28 18:52:03,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-28 18:52:03,050 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:03,051 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:03,051 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:03,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:03,051 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-11-28 18:52:03,052 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:03,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:03,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:03,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:03,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-28 18:52:03,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:03,173 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:03,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:03,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-28 18:52:03,388 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:03,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2018-11-28 18:52:03,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 18:52:03,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 18:52:03,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-11-28 18:52:03,390 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 10 states. [2018-11-28 18:52:03,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:03,779 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2018-11-28 18:52:03,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 18:52:03,779 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-11-28 18:52:03,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:03,781 INFO L225 Difference]: With dead ends: 70 [2018-11-28 18:52:03,781 INFO L226 Difference]: Without dead ends: 39 [2018-11-28 18:52:03,782 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-11-28 18:52:03,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-28 18:52:03,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-28 18:52:03,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-28 18:52:03,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2018-11-28 18:52:03,792 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2018-11-28 18:52:03,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:03,793 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2018-11-28 18:52:03,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 18:52:03,793 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2018-11-28 18:52:03,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-28 18:52:03,795 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:03,795 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:03,795 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:03,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:03,796 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2018-11-28 18:52:03,796 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:03,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:03,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:03,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:03,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-28 18:52:03,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:03,887 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:03,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:03,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-28 18:52:04,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:04,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2018-11-28 18:52:04,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 18:52:04,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 18:52:04,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-28 18:52:04,081 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 10 states. [2018-11-28 18:52:04,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:04,282 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2018-11-28 18:52:04,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 18:52:04,283 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-11-28 18:52:04,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:04,285 INFO L225 Difference]: With dead ends: 61 [2018-11-28 18:52:04,285 INFO L226 Difference]: Without dead ends: 57 [2018-11-28 18:52:04,286 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-11-28 18:52:04,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-28 18:52:04,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2018-11-28 18:52:04,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-28 18:52:04,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-11-28 18:52:04,301 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 40 [2018-11-28 18:52:04,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:04,301 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2018-11-28 18:52:04,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 18:52:04,301 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2018-11-28 18:52:04,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-28 18:52:04,305 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:04,305 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:04,306 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:04,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:04,307 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2018-11-28 18:52:04,307 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:04,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:04,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:04,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:04,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:04,408 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-28 18:52:04,408 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:04,408 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:04,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:04,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-28 18:52:04,537 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:04,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10 [2018-11-28 18:52:04,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 18:52:04,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 18:52:04,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-28 18:52:04,538 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 10 states. [2018-11-28 18:52:04,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:04,952 INFO L93 Difference]: Finished difference Result 71 states and 118 transitions. [2018-11-28 18:52:04,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 18:52:04,953 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2018-11-28 18:52:04,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:04,957 INFO L225 Difference]: With dead ends: 71 [2018-11-28 18:52:04,957 INFO L226 Difference]: Without dead ends: 67 [2018-11-28 18:52:04,959 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-11-28 18:52:04,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-28 18:52:04,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2018-11-28 18:52:04,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-28 18:52:04,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 71 transitions. [2018-11-28 18:52:04,974 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 71 transitions. Word has length 54 [2018-11-28 18:52:04,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:04,974 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 71 transitions. [2018-11-28 18:52:04,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 18:52:04,975 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 71 transitions. [2018-11-28 18:52:04,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-11-28 18:52:04,977 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:04,977 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:04,977 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:04,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:04,978 INFO L82 PathProgramCache]: Analyzing trace with hash 671849284, now seen corresponding path program 2 times [2018-11-28 18:52:04,978 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:04,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:04,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:04,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:04,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:04,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 25 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-11-28 18:52:05,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:05,261 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:05,276 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:52:05,305 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:52:05,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:05,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-11-28 18:52:05,442 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:05,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-11-28 18:52:05,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 18:52:05,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 18:52:05,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-11-28 18:52:05,445 INFO L87 Difference]: Start difference. First operand 49 states and 71 transitions. Second operand 14 states. [2018-11-28 18:52:06,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:06,068 INFO L93 Difference]: Finished difference Result 127 states and 238 transitions. [2018-11-28 18:52:06,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 18:52:06,071 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2018-11-28 18:52:06,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:06,073 INFO L225 Difference]: With dead ends: 127 [2018-11-28 18:52:06,073 INFO L226 Difference]: Without dead ends: 84 [2018-11-28 18:52:06,075 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2018-11-28 18:52:06,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-11-28 18:52:06,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 65. [2018-11-28 18:52:06,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-11-28 18:52:06,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 101 transitions. [2018-11-28 18:52:06,107 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 101 transitions. Word has length 80 [2018-11-28 18:52:06,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:06,108 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 101 transitions. [2018-11-28 18:52:06,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 18:52:06,108 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 101 transitions. [2018-11-28 18:52:06,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-11-28 18:52:06,114 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:06,115 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:06,115 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:06,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:06,115 INFO L82 PathProgramCache]: Analyzing trace with hash 733803902, now seen corresponding path program 1 times [2018-11-28 18:52:06,116 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:06,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:06,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:06,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:06,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:06,458 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 88 proven. 29 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2018-11-28 18:52:06,458 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:06,459 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:06,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:06,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 34 proven. 54 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2018-11-28 18:52:06,671 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:06,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2018-11-28 18:52:06,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-28 18:52:06,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-28 18:52:06,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2018-11-28 18:52:06,675 INFO L87 Difference]: Start difference. First operand 65 states and 101 transitions. Second operand 18 states. [2018-11-28 18:52:07,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:07,763 INFO L93 Difference]: Finished difference Result 171 states and 317 transitions. [2018-11-28 18:52:07,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-28 18:52:07,764 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 108 [2018-11-28 18:52:07,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:07,768 INFO L225 Difference]: With dead ends: 171 [2018-11-28 18:52:07,769 INFO L226 Difference]: Without dead ends: 103 [2018-11-28 18:52:07,771 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2018-11-28 18:52:07,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-11-28 18:52:07,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2018-11-28 18:52:07,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-11-28 18:52:07,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 127 transitions. [2018-11-28 18:52:07,789 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 127 transitions. Word has length 108 [2018-11-28 18:52:07,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:07,790 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 127 transitions. [2018-11-28 18:52:07,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-28 18:52:07,790 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 127 transitions. [2018-11-28 18:52:07,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-11-28 18:52:07,793 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:07,793 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:07,793 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:07,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:07,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1504181040, now seen corresponding path program 2 times [2018-11-28 18:52:07,794 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:07,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:07,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:07,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:07,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:08,051 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 40 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-11-28 18:52:08,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:08,052 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:08,066 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:52:08,105 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:52:08,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:08,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:08,524 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 31 proven. 31 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-28 18:52:08,544 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:08,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2018-11-28 18:52:08,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 18:52:08,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 18:52:08,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-11-28 18:52:08,546 INFO L87 Difference]: Start difference. First operand 85 states and 127 transitions. Second operand 15 states. [2018-11-28 18:52:09,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:09,495 INFO L93 Difference]: Finished difference Result 212 states and 384 transitions. [2018-11-28 18:52:09,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-28 18:52:09,497 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 82 [2018-11-28 18:52:09,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:09,501 INFO L225 Difference]: With dead ends: 212 [2018-11-28 18:52:09,501 INFO L226 Difference]: Without dead ends: 140 [2018-11-28 18:52:09,502 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2018-11-28 18:52:09,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-11-28 18:52:09,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 128. [2018-11-28 18:52:09,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-11-28 18:52:09,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 209 transitions. [2018-11-28 18:52:09,527 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 209 transitions. Word has length 82 [2018-11-28 18:52:09,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:09,527 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 209 transitions. [2018-11-28 18:52:09,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 18:52:09,528 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 209 transitions. [2018-11-28 18:52:09,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-11-28 18:52:09,532 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:09,532 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:09,533 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:09,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:09,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1282397779, now seen corresponding path program 3 times [2018-11-28 18:52:09,533 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:09,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:09,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:09,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:09,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:09,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 114 proven. 36 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2018-11-28 18:52:09,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:09,729 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:09,740 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 18:52:09,776 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-28 18:52:09,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:09,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 86 proven. 20 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2018-11-28 18:52:10,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:10,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2018-11-28 18:52:10,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 18:52:10,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 18:52:10,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2018-11-28 18:52:10,128 INFO L87 Difference]: Start difference. First operand 128 states and 209 transitions. Second operand 14 states. [2018-11-28 18:52:10,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:10,769 INFO L93 Difference]: Finished difference Result 279 states and 505 transitions. [2018-11-28 18:52:10,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-28 18:52:10,773 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 124 [2018-11-28 18:52:10,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:10,777 INFO L225 Difference]: With dead ends: 279 [2018-11-28 18:52:10,777 INFO L226 Difference]: Without dead ends: 163 [2018-11-28 18:52:10,780 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2018-11-28 18:52:10,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-11-28 18:52:10,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 144. [2018-11-28 18:52:10,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-11-28 18:52:10,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 235 transitions. [2018-11-28 18:52:10,803 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 235 transitions. Word has length 124 [2018-11-28 18:52:10,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:10,803 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 235 transitions. [2018-11-28 18:52:10,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 18:52:10,805 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 235 transitions. [2018-11-28 18:52:10,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-11-28 18:52:10,808 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:10,808 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:10,808 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:10,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:10,809 INFO L82 PathProgramCache]: Analyzing trace with hash 2145076032, now seen corresponding path program 1 times [2018-11-28 18:52:10,809 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:10,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:10,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:10,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:10,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:10,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:11,376 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 105 proven. 25 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2018-11-28 18:52:11,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:11,376 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:11,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:11,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 68 proven. 96 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2018-11-28 18:52:11,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:11,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2018-11-28 18:52:11,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 18:52:11,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 18:52:11,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-11-28 18:52:11,598 INFO L87 Difference]: Start difference. First operand 144 states and 235 transitions. Second operand 15 states. [2018-11-28 18:52:12,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:12,629 INFO L93 Difference]: Finished difference Result 177 states and 319 transitions. [2018-11-28 18:52:12,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 18:52:12,630 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 136 [2018-11-28 18:52:12,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:12,633 INFO L225 Difference]: With dead ends: 177 [2018-11-28 18:52:12,634 INFO L226 Difference]: Without dead ends: 115 [2018-11-28 18:52:12,636 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2018-11-28 18:52:12,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-11-28 18:52:12,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2018-11-28 18:52:12,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-11-28 18:52:12,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 150 transitions. [2018-11-28 18:52:12,662 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 150 transitions. Word has length 136 [2018-11-28 18:52:12,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:12,663 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 150 transitions. [2018-11-28 18:52:12,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 18:52:12,663 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 150 transitions. [2018-11-28 18:52:12,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-28 18:52:12,670 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:12,670 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:12,671 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:12,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:12,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 2 times [2018-11-28 18:52:12,671 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:12,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:12,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:12,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:12,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:13,390 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2018-11-28 18:52:13,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:13,391 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:13,401 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:52:13,446 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:52:13,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:13,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2018-11-28 18:52:13,977 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:13,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2018-11-28 18:52:13,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-28 18:52:13,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-28 18:52:13,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2018-11-28 18:52:13,979 INFO L87 Difference]: Start difference. First operand 112 states and 150 transitions. Second operand 28 states. [2018-11-28 18:52:14,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:14,646 INFO L93 Difference]: Finished difference Result 136 states and 184 transitions. [2018-11-28 18:52:14,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-28 18:52:14,647 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 109 [2018-11-28 18:52:14,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:14,650 INFO L225 Difference]: With dead ends: 136 [2018-11-28 18:52:14,651 INFO L226 Difference]: Without dead ends: 132 [2018-11-28 18:52:14,652 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 106 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2018-11-28 18:52:14,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-11-28 18:52:14,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 117. [2018-11-28 18:52:14,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-11-28 18:52:14,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 159 transitions. [2018-11-28 18:52:14,665 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 159 transitions. Word has length 109 [2018-11-28 18:52:14,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:14,665 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 159 transitions. [2018-11-28 18:52:14,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-28 18:52:14,667 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 159 transitions. [2018-11-28 18:52:14,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-11-28 18:52:14,669 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:14,670 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:14,670 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:14,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:14,670 INFO L82 PathProgramCache]: Analyzing trace with hash 235412830, now seen corresponding path program 3 times [2018-11-28 18:52:14,670 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:14,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:14,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:14,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:14,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2018-11-28 18:52:14,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:14,856 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:14,866 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 18:52:14,884 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-28 18:52:14,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:14,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2018-11-28 18:52:15,105 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:15,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2018-11-28 18:52:15,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 18:52:15,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 18:52:15,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-11-28 18:52:15,107 INFO L87 Difference]: Start difference. First operand 117 states and 159 transitions. Second operand 11 states. [2018-11-28 18:52:15,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:15,349 INFO L93 Difference]: Finished difference Result 218 states and 308 transitions. [2018-11-28 18:52:15,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 18:52:15,351 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 108 [2018-11-28 18:52:15,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:15,353 INFO L225 Difference]: With dead ends: 218 [2018-11-28 18:52:15,354 INFO L226 Difference]: Without dead ends: 114 [2018-11-28 18:52:15,355 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2018-11-28 18:52:15,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-11-28 18:52:15,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 109. [2018-11-28 18:52:15,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-11-28 18:52:15,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 142 transitions. [2018-11-28 18:52:15,366 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 142 transitions. Word has length 108 [2018-11-28 18:52:15,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:15,366 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 142 transitions. [2018-11-28 18:52:15,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 18:52:15,366 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 142 transitions. [2018-11-28 18:52:15,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-11-28 18:52:15,370 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:15,370 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:15,371 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:15,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:15,371 INFO L82 PathProgramCache]: Analyzing trace with hash -2102107778, now seen corresponding path program 4 times [2018-11-28 18:52:15,371 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:15,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:15,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:15,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:15,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:15,544 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 57 proven. 136 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2018-11-28 18:52:15,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:15,545 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:15,553 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 18:52:15,584 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 18:52:15,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:15,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 61 proven. 130 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2018-11-28 18:52:15,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:15,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2018-11-28 18:52:15,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 18:52:15,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 18:52:15,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2018-11-28 18:52:15,699 INFO L87 Difference]: Start difference. First operand 109 states and 142 transitions. Second operand 14 states. [2018-11-28 18:52:15,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:15,936 INFO L93 Difference]: Finished difference Result 112 states and 145 transitions. [2018-11-28 18:52:15,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 18:52:15,937 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 136 [2018-11-28 18:52:15,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:15,938 INFO L225 Difference]: With dead ends: 112 [2018-11-28 18:52:15,938 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 18:52:15,940 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2018-11-28 18:52:15,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 18:52:15,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 18:52:15,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 18:52:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 18:52:15,941 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 136 [2018-11-28 18:52:15,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:15,941 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 18:52:15,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 18:52:15,941 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 18:52:15,941 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 18:52:15,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-28 18:52:16,082 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:16,083 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:16,248 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:16,278 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:16,301 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:16,310 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:16,312 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:16,321 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:16,354 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:16,390 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:16,391 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:16,402 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:16,403 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:16,426 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:17,052 WARN L180 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 8 [2018-11-28 18:52:18,368 WARN L180 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 48 DAG size of output: 24 [2018-11-28 18:52:18,722 WARN L180 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 24 [2018-11-28 18:52:18,725 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-28 18:52:18,726 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-28 18:52:18,726 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-28 18:52:18,726 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-28 18:52:18,726 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-28 18:52:18,726 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-28 18:52:18,726 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2018-11-28 18:52:18,726 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2018-11-28 18:52:18,726 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2018-11-28 18:52:18,726 INFO L448 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2018-11-28 18:52:18,727 INFO L448 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2018-11-28 18:52:18,727 INFO L444 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= 5 main_~x~0) (<= main_~x~0 5)) [2018-11-28 18:52:18,727 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2018-11-28 18:52:18,727 INFO L448 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2018-11-28 18:52:18,727 INFO L448 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2018-11-28 18:52:18,727 INFO L451 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2018-11-28 18:52:18,727 INFO L444 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n) (<= 2 |fibo2_#in~n|)) [2018-11-28 18:52:18,727 INFO L448 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-11-28 18:52:18,728 INFO L444 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (and (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 1) (<= |fibo2_#in~n| 3)))) (and (<= fibo2_~n |fibo2_#in~n|) (or (<= 4 fibo2_~n) .cse0) (or (and (<= |fibo2_#t~ret2| 2) (<= 2 |fibo2_#t~ret2|)) (<= 5 |fibo2_#in~n|) .cse0) (<= |fibo2_#in~n| fibo2_~n) (<= 2 |fibo2_#in~n|))) [2018-11-28 18:52:18,728 INFO L448 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-11-28 18:52:18,728 INFO L448 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2018-11-28 18:52:18,728 INFO L448 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2018-11-28 18:52:18,728 INFO L448 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2018-11-28 18:52:18,728 INFO L448 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2018-11-28 18:52:18,728 INFO L451 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2018-11-28 18:52:18,728 INFO L444 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (<= fibo1_~n |fibo1_#in~n|) (< 1 |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)) [2018-11-28 18:52:18,728 INFO L448 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-11-28 18:52:18,729 INFO L444 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (and (<= fibo1_~n |fibo1_#in~n|) (let ((.cse0 (<= 4 fibo1_~n)) (.cse1 (<= |fibo1_#in~n| 4))) (or (and (<= 3 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 3) .cse0) (and (<= 1 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 1) .cse1) (<= 6 |fibo1_#in~n|) (and .cse0 .cse1))) (< 1 |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)) [2018-11-28 18:52:18,729 INFO L448 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2018-11-28 18:52:18,729 INFO L448 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2018-11-28 18:52:18,729 INFO L448 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2018-11-28 18:52:18,729 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2018-11-28 18:52:18,729 INFO L448 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2018-11-28 18:52:18,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 06:52:18 BoogieIcfgContainer [2018-11-28 18:52:18,732 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 18:52:18,733 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 18:52:18,733 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 18:52:18,733 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 18:52:18,733 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:52:00" (3/4) ... [2018-11-28 18:52:18,737 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 18:52:18,743 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-28 18:52:18,744 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-28 18:52:18,744 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2018-11-28 18:52:18,744 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2018-11-28 18:52:18,749 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-28 18:52:18,749 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-28 18:52:18,749 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 18:52:18,802 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-11-28 18:52:18,802 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 18:52:18,804 INFO L168 Benchmark]: Toolchain (without parser) took 19236.43 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 309.3 MB). Free memory was 946.0 MB in the beginning and 930.2 MB in the end (delta: 15.8 MB). Peak memory consumption was 325.2 MB. Max. memory is 11.5 GB. [2018-11-28 18:52:18,805 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 972.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:52:18,805 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.07 ms. Allocated memory is still 1.0 GB. Free memory was 946.0 MB in the beginning and 935.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 18:52:18,806 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.73 ms. Allocated memory is still 1.0 GB. Free memory is still 935.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:52:18,809 INFO L168 Benchmark]: Boogie Preprocessor took 25.13 ms. Allocated memory is still 1.0 GB. Free memory is still 935.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:52:18,809 INFO L168 Benchmark]: RCFGBuilder took 522.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 935.2 MB in the beginning and 1.1 GB in the end (delta: -175.2 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. [2018-11-28 18:52:18,810 INFO L168 Benchmark]: TraceAbstraction took 18343.88 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 175.6 MB). Free memory was 1.1 GB in the beginning and 939.5 MB in the end (delta: 171.0 MB). Peak memory consumption was 346.6 MB. Max. memory is 11.5 GB. [2018-11-28 18:52:18,812 INFO L168 Benchmark]: Witness Printer took 69.39 ms. Allocated memory is still 1.3 GB. Free memory was 939.5 MB in the beginning and 930.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 11.5 GB. [2018-11-28 18:52:18,821 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 972.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 246.07 ms. Allocated memory is still 1.0 GB. Free memory was 946.0 MB in the beginning and 935.2 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 23.73 ms. Allocated memory is still 1.0 GB. Free memory is still 935.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 25.13 ms. Allocated memory is still 1.0 GB. Free memory is still 935.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 522.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 935.2 MB in the beginning and 1.1 GB in the end (delta: -175.2 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 18343.88 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 175.6 MB). Free memory was 1.1 GB in the beginning and 939.5 MB in the end (delta: 171.0 MB). Peak memory consumption was 346.6 MB. Max. memory is 11.5 GB. * Witness Printer took 69.39 ms. Allocated memory is still 1.3 GB. Free memory was 939.5 MB in the beginning and 930.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. SAFE Result, 18.2s OverallTime, 15 OverallIterations, 10 TraceHistogramMax, 7.9s AutomataDifference, 0.0s DeadEndRemovalTime, 2.7s HoareAnnotationTime, HoareTripleCheckerStatistics: 464 SDtfs, 451 SDslu, 3169 SDs, 0 SdLazy, 3013 SolverSat, 391 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1316 GetRequests, 1061 SyntacticMatches, 13 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 6.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=144occurred in iteration=11, 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, 15 MinimizatonAttempts, 128 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 350 PreInvPairs, 668 NumberOfFragments, 124 HoareAnnotationTreeSize, 350 FomulaSimplifications, 17137 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 11 FomulaSimplificationsInter, 1519 FormulaSimplificationTreeSizeReductionInter, 2.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 5.7s InterpolantComputationTime, 2165 NumberOfCodeBlocks, 2010 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 2137 ConstructedInterpolants, 0 QuantifiedInterpolants, 395643 SizeOfPredicates, 51 NumberOfNonLiveVariables, 2026 ConjunctsInSsa, 166 ConjunctsInUnsatCore, 28 InterpolantComputations, 2 PerfectInterpolantSequences, 3824/4738 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...