./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive-simple/id_i20_o20_false-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/id_i20_o20_false-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 7d05936c4bb1bb97a4b24ebc11d02c0e844c743b ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-91b1670 [2018-11-28 18:51:11,457 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 18:51:11,461 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 18:51:11,474 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 18:51:11,475 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 18:51:11,476 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 18:51:11,477 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 18:51:11,480 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 18:51:11,482 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 18:51:11,482 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 18:51:11,483 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 18:51:11,484 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 18:51:11,485 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 18:51:11,486 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 18:51:11,489 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 18:51:11,490 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 18:51:11,491 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 18:51:11,493 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 18:51:11,495 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 18:51:11,497 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 18:51:11,498 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 18:51:11,499 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 18:51:11,502 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 18:51:11,502 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 18:51:11,502 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 18:51:11,504 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 18:51:11,505 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 18:51:11,506 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 18:51:11,507 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 18:51:11,508 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 18:51:11,508 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 18:51:11,509 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 18:51:11,509 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 18:51:11,509 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 18:51:11,510 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 18:51:11,512 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 18:51:11,512 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 18:51:11,531 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 18:51:11,531 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 18:51:11,532 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 18:51:11,532 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 18:51:11,533 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 18:51:11,533 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 18:51:11,533 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 18:51:11,534 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 18:51:11,534 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 18:51:11,535 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 18:51:11,535 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 18:51:11,535 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 18:51:11,535 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 18:51:11,535 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 18:51:11,535 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 18:51:11,536 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 18:51:11,537 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 18:51:11,537 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 18:51:11,537 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 18:51:11,537 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 18:51:11,537 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 18:51:11,537 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 18:51:11,538 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 18:51:11,539 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 18:51:11,539 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 18:51:11,539 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 18:51:11,539 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 18:51:11,539 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 18:51:11,540 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 18:51:11,540 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 18:51:11,540 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 -> 7d05936c4bb1bb97a4b24ebc11d02c0e844c743b [2018-11-28 18:51:11,579 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 18:51:11,599 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 18:51:11,605 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 18:51:11,607 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 18:51:11,607 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 18:51:11,608 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive-simple/id_i20_o20_false-unreach-call_true-termination.c [2018-11-28 18:51:11,688 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ef1e101e/f6245c79658049a49241ce4b01d28c8d/FLAG349998d48 [2018-11-28 18:51:12,093 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 18:51:12,094 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive-simple/id_i20_o20_false-unreach-call_true-termination.c [2018-11-28 18:51:12,100 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ef1e101e/f6245c79658049a49241ce4b01d28c8d/FLAG349998d48 [2018-11-28 18:51:12,465 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ef1e101e/f6245c79658049a49241ce4b01d28c8d [2018-11-28 18:51:12,471 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 18:51:12,472 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 18:51:12,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 18:51:12,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 18:51:12,477 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 18:51:12,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:51:12" (1/1) ... [2018-11-28 18:51:12,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28951cd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:12, skipping insertion in model container [2018-11-28 18:51:12,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:51:12" (1/1) ... [2018-11-28 18:51:12,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 18:51:12,509 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 18:51:12,724 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:51:12,729 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 18:51:12,752 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:51:12,771 INFO L195 MainTranslator]: Completed translation [2018-11-28 18:51:12,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:12 WrapperNode [2018-11-28 18:51:12,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 18:51:12,774 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 18:51:12,774 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 18:51:12,775 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 18:51:12,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:12" (1/1) ... [2018-11-28 18:51:12,792 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:12" (1/1) ... [2018-11-28 18:51:12,801 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 18:51:12,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 18:51:12,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 18:51:12,802 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 18:51:12,815 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:12" (1/1) ... [2018-11-28 18:51:12,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:12" (1/1) ... [2018-11-28 18:51:12,817 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:12" (1/1) ... [2018-11-28 18:51:12,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:12" (1/1) ... [2018-11-28 18:51:12,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:12" (1/1) ... [2018-11-28 18:51:12,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:12" (1/1) ... [2018-11-28 18:51:12,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:12" (1/1) ... [2018-11-28 18:51:12,829 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 18:51:12,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 18:51:12,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 18:51:12,830 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 18:51:12,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:12" (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 18:51:12,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 18:51:12,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 18:51:12,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 18:51:12,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 18:51:12,971 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 18:51:12,972 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 18:51:12,972 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-28 18:51:12,972 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-28 18:51:13,138 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 18:51:13,138 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 18:51:13,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:51:13 BoogieIcfgContainer [2018-11-28 18:51:13,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 18:51:13,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 18:51:13,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 18:51:13,143 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 18:51:13,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 06:51:12" (1/3) ... [2018-11-28 18:51:13,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@793a19b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:51:13, skipping insertion in model container [2018-11-28 18:51:13,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:12" (2/3) ... [2018-11-28 18:51:13,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@793a19b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:51:13, skipping insertion in model container [2018-11-28 18:51:13,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:51:13" (3/3) ... [2018-11-28 18:51:13,146 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i20_o20_false-unreach-call_true-termination.c [2018-11-28 18:51:13,156 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 18:51:13,164 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 18:51:13,181 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 18:51:13,210 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 18:51:13,211 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 18:51:13,211 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 18:51:13,211 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 18:51:13,211 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 18:51:13,211 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 18:51:13,211 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 18:51:13,211 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 18:51:13,212 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 18:51:13,230 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-28 18:51:13,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-28 18:51:13,236 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:13,237 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:13,239 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:13,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:13,245 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-11-28 18:51:13,247 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:13,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:13,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:13,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:13,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:13,557 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 18:51:13,560 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:51:13,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 18:51:13,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 18:51:13,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 18:51:13,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:51:13,581 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-28 18:51:13,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:13,728 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-28 18:51:13,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 18:51:13,730 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-28 18:51:13,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:13,741 INFO L225 Difference]: With dead ends: 30 [2018-11-28 18:51:13,741 INFO L226 Difference]: Without dead ends: 18 [2018-11-28 18:51:13,745 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 18:51:13,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-28 18:51:13,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-28 18:51:13,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-28 18:51:13,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-28 18:51:13,793 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-28 18:51:13,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:13,795 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-28 18:51:13,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 18:51:13,795 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-28 18:51:13,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-28 18:51:13,797 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:13,798 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:13,798 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:13,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:13,798 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-11-28 18:51:13,799 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:13,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:13,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:13,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:13,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:13,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 18:51:13,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:13,903 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 18:51:13,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:13,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 18:51:14,043 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:14,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-28 18:51:14,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 18:51:14,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 18:51:14,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:51:14,045 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-11-28 18:51:14,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:14,441 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-28 18:51:14,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 18:51:14,442 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-28 18:51:14,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:14,443 INFO L225 Difference]: With dead ends: 25 [2018-11-28 18:51:14,443 INFO L226 Difference]: Without dead ends: 21 [2018-11-28 18:51:14,445 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-28 18:51:14,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-28 18:51:14,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-28 18:51:14,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 18:51:14,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-28 18:51:14,451 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-28 18:51:14,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:14,451 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-28 18:51:14,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 18:51:14,452 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-28 18:51:14,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-28 18:51:14,453 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:14,453 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:14,453 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:14,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:14,454 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-11-28 18:51:14,454 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:14,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:14,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:14,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:14,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:14,852 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-28 18:51:14,852 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:14,852 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 18:51:14,865 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:51:14,908 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:51:14,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:14,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:14,949 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-28 18:51:14,972 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:14,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-28 18:51:14,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-28 18:51:14,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 18:51:14,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-28 18:51:14,973 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-11-28 18:51:15,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:15,272 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-28 18:51:15,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 18:51:15,276 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-11-28 18:51:15,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:15,278 INFO L225 Difference]: With dead ends: 28 [2018-11-28 18:51:15,278 INFO L226 Difference]: Without dead ends: 24 [2018-11-28 18:51:15,281 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-28 18:51:15,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-28 18:51:15,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-28 18:51:15,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-28 18:51:15,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-28 18:51:15,292 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-28 18:51:15,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:15,292 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-28 18:51:15,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-28 18:51:15,294 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-28 18:51:15,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-28 18:51:15,295 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:15,295 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:15,295 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:15,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:15,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-11-28 18:51:15,296 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:15,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:15,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:15,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:15,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:15,484 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-28 18:51:15,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:15,484 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 18:51:15,498 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 18:51:15,523 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-28 18:51:15,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:15,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-28 18:51:15,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:15,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-28 18:51:15,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 18:51:15,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 18:51:15,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-28 18:51:15,564 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2018-11-28 18:51:15,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:15,623 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-28 18:51:15,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 18:51:15,624 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-11-28 18:51:15,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:15,625 INFO L225 Difference]: With dead ends: 31 [2018-11-28 18:51:15,625 INFO L226 Difference]: Without dead ends: 27 [2018-11-28 18:51:15,626 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-28 18:51:15,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-28 18:51:15,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-28 18:51:15,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-28 18:51:15,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-28 18:51:15,633 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-11-28 18:51:15,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:15,633 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-28 18:51:15,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 18:51:15,634 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-28 18:51:15,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-28 18:51:15,635 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:15,635 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:15,636 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:15,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:15,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-11-28 18:51:15,636 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:15,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:15,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:15,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:15,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:16,069 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-28 18:51:16,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:16,070 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 18:51:16,081 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 18:51:16,125 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 18:51:16,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:16,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:16,167 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-28 18:51:16,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:16,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-28 18:51:16,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 18:51:16,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 18:51:16,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-28 18:51:16,188 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-11-28 18:51:16,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:16,352 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-28 18:51:16,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 18:51:16,353 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-11-28 18:51:16,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:16,356 INFO L225 Difference]: With dead ends: 34 [2018-11-28 18:51:16,356 INFO L226 Difference]: Without dead ends: 30 [2018-11-28 18:51:16,357 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-28 18:51:16,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-28 18:51:16,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-28 18:51:16,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-28 18:51:16,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-28 18:51:16,364 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-11-28 18:51:16,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:16,365 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-28 18:51:16,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 18:51:16,365 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-28 18:51:16,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-28 18:51:16,366 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:16,367 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:16,369 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:16,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:16,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-11-28 18:51:16,370 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:16,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:16,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:16,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:16,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-28 18:51:16,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:16,628 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:51:16,647 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 18:51:16,678 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-28 18:51:16,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:16,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-28 18:51:16,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:16,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-28 18:51:16,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 18:51:16,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 18:51:16,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-11-28 18:51:16,720 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2018-11-28 18:51:16,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:16,810 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-28 18:51:16,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 18:51:16,816 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-11-28 18:51:16,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:16,819 INFO L225 Difference]: With dead ends: 37 [2018-11-28 18:51:16,819 INFO L226 Difference]: Without dead ends: 33 [2018-11-28 18:51:16,820 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-11-28 18:51:16,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-28 18:51:16,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-28 18:51:16,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-28 18:51:16,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-28 18:51:16,828 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-11-28 18:51:16,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:16,828 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-28 18:51:16,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 18:51:16,829 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-28 18:51:16,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-28 18:51:16,830 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:16,831 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:16,831 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:16,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:16,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-11-28 18:51:16,831 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:16,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:16,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:16,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:16,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:16,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-28 18:51:17,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:17,284 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 18:51:17,293 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 18:51:17,322 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-28 18:51:17,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:17,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-28 18:51:17,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:17,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2018-11-28 18:51:17,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-28 18:51:17,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-28 18:51:17,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2018-11-28 18:51:17,583 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 26 states. [2018-11-28 18:51:18,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:18,167 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-28 18:51:18,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-28 18:51:18,168 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 49 [2018-11-28 18:51:18,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:18,170 INFO L225 Difference]: With dead ends: 40 [2018-11-28 18:51:18,170 INFO L226 Difference]: Without dead ends: 36 [2018-11-28 18:51:18,172 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2018-11-28 18:51:18,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-28 18:51:18,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-28 18:51:18,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-28 18:51:18,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-28 18:51:18,179 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-11-28 18:51:18,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:18,179 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-28 18:51:18,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-28 18:51:18,183 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-28 18:51:18,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-28 18:51:18,184 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:18,185 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:18,185 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:18,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:18,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2018-11-28 18:51:18,186 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:18,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:18,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:18,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:18,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:18,418 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-28 18:51:18,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:18,420 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 18:51:18,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:18,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-28 18:51:18,711 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:18,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2018-11-28 18:51:18,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-28 18:51:18,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-28 18:51:18,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2018-11-28 18:51:18,713 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 29 states. [2018-11-28 18:51:19,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:19,459 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-28 18:51:19,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-28 18:51:19,460 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 55 [2018-11-28 18:51:19,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:19,462 INFO L225 Difference]: With dead ends: 43 [2018-11-28 18:51:19,462 INFO L226 Difference]: Without dead ends: 39 [2018-11-28 18:51:19,464 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=354, Invalid=1538, Unknown=0, NotChecked=0, Total=1892 [2018-11-28 18:51:19,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-28 18:51:19,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-28 18:51:19,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-28 18:51:19,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-28 18:51:19,471 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-11-28 18:51:19,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:19,472 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-28 18:51:19,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-28 18:51:19,472 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-28 18:51:19,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-28 18:51:19,473 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:19,473 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:19,474 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:19,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:19,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2018-11-28 18:51:19,474 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:19,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:19,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:19,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:19,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-28 18:51:19,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:19,672 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 18:51:19,682 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:51:19,701 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:51:19,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:19,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-28 18:51:19,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:19,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-28 18:51:19,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 18:51:19,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 18:51:19,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-11-28 18:51:19,762 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-11-28 18:51:19,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:19,934 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-28 18:51:19,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 18:51:19,937 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-11-28 18:51:19,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:19,939 INFO L225 Difference]: With dead ends: 46 [2018-11-28 18:51:19,940 INFO L226 Difference]: Without dead ends: 42 [2018-11-28 18:51:19,941 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-11-28 18:51:19,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-28 18:51:19,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-28 18:51:19,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-28 18:51:19,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-28 18:51:19,948 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-11-28 18:51:19,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:19,948 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-28 18:51:19,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 18:51:19,948 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-28 18:51:19,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-28 18:51:19,949 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:19,950 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:19,950 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:19,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:19,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2018-11-28 18:51:19,951 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:19,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:19,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:19,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:19,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-28 18:51:20,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:20,213 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 18:51:20,225 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 18:51:20,389 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-28 18:51:20,389 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:20,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-28 18:51:21,061 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:21,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2018-11-28 18:51:21,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-11-28 18:51:21,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-11-28 18:51:21,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2018-11-28 18:51:21,064 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 35 states. [2018-11-28 18:51:21,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:21,631 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-28 18:51:21,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-28 18:51:21,632 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 67 [2018-11-28 18:51:21,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:21,635 INFO L225 Difference]: With dead ends: 49 [2018-11-28 18:51:21,635 INFO L226 Difference]: Without dead ends: 45 [2018-11-28 18:51:21,637 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2018-11-28 18:51:21,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-28 18:51:21,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-28 18:51:21,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-28 18:51:21,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-28 18:51:21,644 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-11-28 18:51:21,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:21,645 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-28 18:51:21,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-11-28 18:51:21,645 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-28 18:51:21,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-28 18:51:21,647 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:21,647 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:21,647 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:21,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:21,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2018-11-28 18:51:21,648 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:21,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:21,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:21,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:21,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-28 18:51:21,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:21,845 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 18:51:21,855 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 18:51:21,913 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 18:51:21,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:21,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:21,967 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-28 18:51:21,989 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:21,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-28 18:51:21,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 18:51:21,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 18:51:21,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-11-28 18:51:21,990 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2018-11-28 18:51:22,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:22,290 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-11-28 18:51:22,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 18:51:22,291 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-11-28 18:51:22,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:22,293 INFO L225 Difference]: With dead ends: 52 [2018-11-28 18:51:22,293 INFO L226 Difference]: Without dead ends: 48 [2018-11-28 18:51:22,294 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-11-28 18:51:22,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-28 18:51:22,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-28 18:51:22,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-28 18:51:22,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-28 18:51:22,300 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-11-28 18:51:22,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:22,301 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-28 18:51:22,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 18:51:22,301 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-28 18:51:22,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-28 18:51:22,302 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:22,302 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:22,303 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:22,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:22,303 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2018-11-28 18:51:22,303 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:22,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:22,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:22,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:22,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-28 18:51:22,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:22,585 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 18:51:22,594 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 18:51:22,735 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-28 18:51:22,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:22,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-28 18:51:22,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:22,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-28 18:51:22,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-28 18:51:22,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-28 18:51:22,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-11-28 18:51:22,816 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-11-28 18:51:23,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:23,178 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-11-28 18:51:23,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 18:51:23,179 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-11-28 18:51:23,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:23,181 INFO L225 Difference]: With dead ends: 55 [2018-11-28 18:51:23,181 INFO L226 Difference]: Without dead ends: 51 [2018-11-28 18:51:23,182 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-11-28 18:51:23,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-28 18:51:23,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-11-28 18:51:23,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-28 18:51:23,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-11-28 18:51:23,189 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-11-28 18:51:23,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:23,189 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-11-28 18:51:23,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-28 18:51:23,190 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-11-28 18:51:23,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-28 18:51:23,192 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:23,192 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:23,193 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:23,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:23,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2018-11-28 18:51:23,193 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:23,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:23,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:23,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:23,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:23,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-28 18:51:23,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:23,598 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 18:51:23,612 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 18:51:23,647 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-28 18:51:23,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:23,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-28 18:51:23,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:23,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-11-28 18:51:23,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-28 18:51:23,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-28 18:51:23,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2018-11-28 18:51:23,691 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 29 states. [2018-11-28 18:51:23,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:23,776 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-11-28 18:51:23,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-28 18:51:23,777 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2018-11-28 18:51:23,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:23,779 INFO L225 Difference]: With dead ends: 58 [2018-11-28 18:51:23,779 INFO L226 Difference]: Without dead ends: 54 [2018-11-28 18:51:23,779 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2018-11-28 18:51:23,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-28 18:51:23,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-28 18:51:23,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-28 18:51:23,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-11-28 18:51:23,786 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-11-28 18:51:23,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:23,786 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-11-28 18:51:23,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-28 18:51:23,786 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-11-28 18:51:23,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-11-28 18:51:23,787 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:23,788 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:23,788 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:23,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:23,788 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2018-11-28 18:51:23,788 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:23,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:23,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:23,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:23,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:23,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-28 18:51:24,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:24,273 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 18:51:24,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:24,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:24,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:24,739 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-28 18:51:24,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:24,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 18] total 47 [2018-11-28 18:51:24,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-11-28 18:51:24,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-11-28 18:51:24,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1811, Unknown=0, NotChecked=0, Total=2162 [2018-11-28 18:51:24,760 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 47 states. [2018-11-28 18:51:26,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:26,073 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-11-28 18:51:26,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-28 18:51:26,073 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 91 [2018-11-28 18:51:26,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:26,074 INFO L225 Difference]: With dead ends: 61 [2018-11-28 18:51:26,075 INFO L226 Difference]: Without dead ends: 57 [2018-11-28 18:51:26,077 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=993, Invalid=4409, Unknown=0, NotChecked=0, Total=5402 [2018-11-28 18:51:26,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-28 18:51:26,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-28 18:51:26,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-28 18:51:26,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-11-28 18:51:26,083 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-11-28 18:51:26,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:26,083 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-11-28 18:51:26,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-11-28 18:51:26,084 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-11-28 18:51:26,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-28 18:51:26,085 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:26,085 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:26,085 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:26,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:26,086 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2018-11-28 18:51:26,086 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:26,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:26,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:26,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:26,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-28 18:51:26,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:26,994 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:27,005 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:51:27,034 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:51:27,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:27,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-28 18:51:27,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:27,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 19] total 50 [2018-11-28 18:51:27,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-11-28 18:51:27,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-11-28 18:51:27,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=2052, Unknown=0, NotChecked=0, Total=2450 [2018-11-28 18:51:27,504 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 50 states. [2018-11-28 18:51:28,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:28,437 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-11-28 18:51:28,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-28 18:51:28,438 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 97 [2018-11-28 18:51:28,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:28,440 INFO L225 Difference]: With dead ends: 64 [2018-11-28 18:51:28,440 INFO L226 Difference]: Without dead ends: 60 [2018-11-28 18:51:28,442 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1131, Invalid=5031, Unknown=0, NotChecked=0, Total=6162 [2018-11-28 18:51:28,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-28 18:51:28,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-28 18:51:28,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-28 18:51:28,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-11-28 18:51:28,449 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-11-28 18:51:28,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:28,449 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-11-28 18:51:28,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-11-28 18:51:28,449 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-11-28 18:51:28,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-11-28 18:51:28,451 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:28,451 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:28,451 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:28,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:28,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2018-11-28 18:51:28,452 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:28,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:28,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:28,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:28,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-28 18:51:28,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:28,929 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:28,939 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 18:51:28,989 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-28 18:51:28,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:28,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:29,489 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-28 18:51:29,509 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:29,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 20] total 53 [2018-11-28 18:51:29,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-11-28 18:51:29,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-11-28 18:51:29,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=2308, Unknown=0, NotChecked=0, Total=2756 [2018-11-28 18:51:29,511 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 53 states. [2018-11-28 18:51:30,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:30,744 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-11-28 18:51:30,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-11-28 18:51:30,745 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 103 [2018-11-28 18:51:30,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:30,747 INFO L225 Difference]: With dead ends: 67 [2018-11-28 18:51:30,747 INFO L226 Difference]: Without dead ends: 63 [2018-11-28 18:51:30,750 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1278, Invalid=5694, Unknown=0, NotChecked=0, Total=6972 [2018-11-28 18:51:30,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-28 18:51:30,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-11-28 18:51:30,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-28 18:51:30,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-11-28 18:51:30,756 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2018-11-28 18:51:30,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:30,757 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-11-28 18:51:30,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-11-28 18:51:30,757 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-11-28 18:51:30,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-28 18:51:30,758 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:30,759 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:30,761 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:30,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:30,761 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2018-11-28 18:51:30,761 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:30,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:30,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:30,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:30,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:31,287 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-28 18:51:31,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:31,288 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:31,299 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 18:51:31,348 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 18:51:31,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:31,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-28 18:51:31,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:31,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 21] total 56 [2018-11-28 18:51:31,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-11-28 18:51:31,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-11-28 18:51:31,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=2579, Unknown=0, NotChecked=0, Total=3080 [2018-11-28 18:51:31,971 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 56 states. [2018-11-28 18:51:33,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:33,027 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-11-28 18:51:33,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-28 18:51:33,032 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 109 [2018-11-28 18:51:33,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:33,033 INFO L225 Difference]: With dead ends: 70 [2018-11-28 18:51:33,033 INFO L226 Difference]: Without dead ends: 66 [2018-11-28 18:51:33,037 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1434, Invalid=6398, Unknown=0, NotChecked=0, Total=7832 [2018-11-28 18:51:33,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-28 18:51:33,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-11-28 18:51:33,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-28 18:51:33,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-11-28 18:51:33,044 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2018-11-28 18:51:33,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:33,045 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-11-28 18:51:33,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-11-28 18:51:33,045 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-11-28 18:51:33,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-11-28 18:51:33,046 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:33,046 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:33,049 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:33,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:33,049 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2018-11-28 18:51:33,049 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:33,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:33,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:33,051 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:33,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:33,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:33,292 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-28 18:51:33,292 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:33,293 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:33,303 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 18:51:33,353 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-28 18:51:33,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:33,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:34,233 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-28 18:51:34,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:34,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39] total 59 [2018-11-28 18:51:34,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-11-28 18:51:34,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-11-28 18:51:34,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=2865, Unknown=0, NotChecked=0, Total=3422 [2018-11-28 18:51:34,256 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 59 states. [2018-11-28 18:51:35,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:35,480 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-11-28 18:51:35,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-28 18:51:35,481 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 115 [2018-11-28 18:51:35,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:35,482 INFO L225 Difference]: With dead ends: 73 [2018-11-28 18:51:35,482 INFO L226 Difference]: Without dead ends: 69 [2018-11-28 18:51:35,485 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1562 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1599, Invalid=7143, Unknown=0, NotChecked=0, Total=8742 [2018-11-28 18:51:35,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-28 18:51:35,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-11-28 18:51:35,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-28 18:51:35,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-11-28 18:51:35,490 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2018-11-28 18:51:35,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:35,491 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-11-28 18:51:35,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-11-28 18:51:35,491 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-11-28 18:51:35,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-28 18:51:35,492 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:35,492 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:35,492 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:35,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:35,493 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2018-11-28 18:51:35,496 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:35,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:35,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:35,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:35,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-28 18:51:35,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:35,975 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:35,990 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 18:51:36,037 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-28 18:51:36,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:36,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:36,837 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-28 18:51:36,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:36,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2018-11-28 18:51:36,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-11-28 18:51:36,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-11-28 18:51:36,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3166, Unknown=0, NotChecked=0, Total=3782 [2018-11-28 18:51:36,861 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 62 states. [2018-11-28 18:51:38,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:38,214 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2018-11-28 18:51:38,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-11-28 18:51:38,220 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 121 [2018-11-28 18:51:38,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:38,221 INFO L225 Difference]: With dead ends: 76 [2018-11-28 18:51:38,221 INFO L226 Difference]: Without dead ends: 72 [2018-11-28 18:51:38,223 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1773, Invalid=7929, Unknown=0, NotChecked=0, Total=9702 [2018-11-28 18:51:38,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-28 18:51:38,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-11-28 18:51:38,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-11-28 18:51:38,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-11-28 18:51:38,228 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2018-11-28 18:51:38,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:38,228 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-11-28 18:51:38,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-11-28 18:51:38,228 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-11-28 18:51:38,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-28 18:51:38,229 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:38,229 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:38,230 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:38,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:38,231 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2018-11-28 18:51:38,231 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:38,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:38,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:38,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:38,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-28 18:51:38,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:38,541 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:38,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:38,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:38,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-28 18:51:38,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:38,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-11-28 18:51:38,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-28 18:51:38,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-28 18:51:38,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-11-28 18:51:38,639 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2018-11-28 18:51:39,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:39,123 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-11-28 18:51:39,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-28 18:51:39,130 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2018-11-28 18:51:39,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:39,131 INFO L225 Difference]: With dead ends: 79 [2018-11-28 18:51:39,131 INFO L226 Difference]: Without dead ends: 75 [2018-11-28 18:51:39,132 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2018-11-28 18:51:39,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-28 18:51:39,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-11-28 18:51:39,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-28 18:51:39,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-11-28 18:51:39,136 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2018-11-28 18:51:39,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:39,136 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-11-28 18:51:39,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-28 18:51:39,137 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-11-28 18:51:39,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-28 18:51:39,137 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:39,138 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:39,138 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:39,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:39,138 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2018-11-28 18:51:39,138 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:39,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:39,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:39,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:39,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:39,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 18:51:39,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 18:51:39,187 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-11-28 18:51:39,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 06:51:39 BoogieIcfgContainer [2018-11-28 18:51:39,236 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 18:51:39,236 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 18:51:39,236 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 18:51:39,236 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 18:51:39,237 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:51:13" (3/4) ... [2018-11-28 18:51:39,241 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-28 18:51:39,333 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-11-28 18:51:39,333 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 18:51:39,334 INFO L168 Benchmark]: Toolchain (without parser) took 26862.84 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 430.4 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -198.3 MB). Peak memory consumption was 232.2 MB. Max. memory is 11.5 GB. [2018-11-28 18:51:39,336 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:51:39,337 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.40 ms. Allocated memory is still 1.0 GB. Free memory was 951.4 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 18:51:39,337 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.12 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:51:39,337 INFO L168 Benchmark]: Boogie Preprocessor took 27.22 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:51:39,340 INFO L168 Benchmark]: RCFGBuilder took 309.60 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 116.9 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -160.8 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. [2018-11-28 18:51:39,341 INFO L168 Benchmark]: TraceAbstraction took 26095.90 ms. Allocated memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: 313.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -48.2 MB). Peak memory consumption was 265.3 MB. Max. memory is 11.5 GB. [2018-11-28 18:51:39,342 INFO L168 Benchmark]: Witness Printer took 96.94 ms. Allocated memory is still 1.5 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:51:39,346 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 300.40 ms. Allocated memory is still 1.0 GB. Free memory was 951.4 MB in the beginning and 940.6 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 27.12 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 27.22 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 309.60 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 116.9 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -160.8 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 26095.90 ms. Allocated memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: 313.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -48.2 MB). Peak memory consumption was 265.3 MB. Max. memory is 11.5 GB. * Witness Printer took 96.94 ms. Allocated memory is still 1.5 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 20; VAL [input=20] [L11] CALL, EXPR id(input) VAL [\old(x)=20] [L5] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L6] CALL, EXPR id(x-1) VAL [\old(x)=19] [L5] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L6] CALL, EXPR id(x-1) VAL [\old(x)=18] [L5] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L6] CALL, EXPR id(x-1) VAL [\old(x)=17] [L5] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L6] CALL, EXPR id(x-1) VAL [\old(x)=16] [L5] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L6] CALL, EXPR id(x-1) VAL [\old(x)=15] [L5] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L6] CALL, EXPR id(x-1) VAL [\old(x)=14] [L5] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L6] CALL, EXPR id(x-1) VAL [\old(x)=13] [L5] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L6] CALL, EXPR id(x-1) VAL [\old(x)=12] [L5] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L6] CALL, EXPR id(x-1) VAL [\old(x)=11] [L5] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L6] CALL, EXPR id(x-1) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) VAL [id(input)=20, input=20] [L11] int result = id(input); [L12] COND TRUE result == 20 VAL [input=20, result=20] [L13] __VERIFIER_error() VAL [input=20, result=20] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 26.0s OverallTime, 21 OverallIterations, 21 TraceHistogramMax, 11.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 261 SDtfs, 347 SDslu, 3966 SDs, 0 SdLazy, 2237 SolverSat, 160 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2150 GetRequests, 1321 SyntacticMatches, 0 SemanticMatches, 829 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9629 ImplicationChecksByTransitivity, 18.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=20, 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: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 11.7s InterpolantComputationTime, 2920 NumberOfCodeBlocks, 2920 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2748 ConstructedInterpolants, 0 QuantifiedInterpolants, 547176 SizeOfPredicates, 158 NumberOfNonLiveVariables, 3268 ConjunctsInSsa, 456 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 7600/15200 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...