./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id2_i5_o5-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/bin/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 ../sv-benchmarks/c/recursive-simple/id2_i5_o5-1.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 59c5766d3cddc0d41e2678bb5221cccc60217431 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.1.25-f470102 [2019-11-28 17:29:45,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 17:29:45,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 17:29:45,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 17:29:45,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 17:29:45,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 17:29:45,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 17:29:45,388 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 17:29:45,390 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 17:29:45,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 17:29:45,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 17:29:45,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 17:29:45,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 17:29:45,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 17:29:45,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 17:29:45,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 17:29:45,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 17:29:45,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 17:29:45,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 17:29:45,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 17:29:45,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 17:29:45,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 17:29:45,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 17:29:45,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 17:29:45,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 17:29:45,413 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 17:29:45,413 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 17:29:45,414 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 17:29:45,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 17:29:45,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 17:29:45,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 17:29:45,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 17:29:45,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 17:29:45,419 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 17:29:45,420 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 17:29:45,421 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 17:29:45,422 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 17:29:45,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 17:29:45,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 17:29:45,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 17:29:45,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 17:29:45,425 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 17:29:45,440 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 17:29:45,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 17:29:45,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 17:29:45,443 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 17:29:45,443 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 17:29:45,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 17:29:45,443 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 17:29:45,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 17:29:45,444 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 17:29:45,444 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 17:29:45,444 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 17:29:45,445 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 17:29:45,445 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 17:29:45,445 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 17:29:45,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 17:29:45,446 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 17:29:45,446 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 17:29:45,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 17:29:45,447 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 17:29:45,447 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 17:29:45,447 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 17:29:45,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:29:45,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 17:29:45,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 17:29:45,448 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 17:29:45,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 17:29:45,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 17:29:45,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 17:29:45,450 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 17:29:45,450 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> 59c5766d3cddc0d41e2678bb5221cccc60217431 [2019-11-28 17:29:45,767 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 17:29:45,785 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 17:29:45,789 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 17:29:45,791 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 17:29:45,791 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 17:29:45,793 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id2_i5_o5-1.c [2019-11-28 17:29:45,869 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2a70dfcb/c0ef72b2427c4e76a2620f9de8277999/FLAG4bd103021 [2019-11-28 17:29:46,344 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 17:29:46,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id2_i5_o5-1.c [2019-11-28 17:29:46,351 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2a70dfcb/c0ef72b2427c4e76a2620f9de8277999/FLAG4bd103021 [2019-11-28 17:29:46,699 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2a70dfcb/c0ef72b2427c4e76a2620f9de8277999 [2019-11-28 17:29:46,702 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 17:29:46,704 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 17:29:46,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 17:29:46,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 17:29:46,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 17:29:46,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:29:46" (1/1) ... [2019-11-28 17:29:46,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60399f31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:46, skipping insertion in model container [2019-11-28 17:29:46,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:29:46" (1/1) ... [2019-11-28 17:29:46,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 17:29:46,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 17:29:46,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:29:46,930 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 17:29:46,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:29:46,961 INFO L208 MainTranslator]: Completed translation [2019-11-28 17:29:46,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:46 WrapperNode [2019-11-28 17:29:46,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 17:29:46,963 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 17:29:46,964 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 17:29:46,964 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 17:29:46,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:46" (1/1) ... [2019-11-28 17:29:46,978 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:46" (1/1) ... [2019-11-28 17:29:46,996 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 17:29:46,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 17:29:46,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 17:29:46,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 17:29:47,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:46" (1/1) ... [2019-11-28 17:29:47,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:46" (1/1) ... [2019-11-28 17:29:47,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:46" (1/1) ... [2019-11-28 17:29:47,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:46" (1/1) ... [2019-11-28 17:29:47,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:46" (1/1) ... [2019-11-28 17:29:47,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:46" (1/1) ... [2019-11-28 17:29:47,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:46" (1/1) ... [2019-11-28 17:29:47,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 17:29:47,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 17:29:47,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 17:29:47,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 17:29:47,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:29:47,136 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2019-11-28 17:29:47,136 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2019-11-28 17:29:47,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 17:29:47,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 17:29:47,137 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-28 17:29:47,137 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-28 17:29:47,295 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 17:29:47,296 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 17:29:47,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:29:47 BoogieIcfgContainer [2019-11-28 17:29:47,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 17:29:47,298 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 17:29:47,298 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 17:29:47,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 17:29:47,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:29:46" (1/3) ... [2019-11-28 17:29:47,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@488ada26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:29:47, skipping insertion in model container [2019-11-28 17:29:47,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:46" (2/3) ... [2019-11-28 17:29:47,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@488ada26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:29:47, skipping insertion in model container [2019-11-28 17:29:47,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:29:47" (3/3) ... [2019-11-28 17:29:47,305 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-1.c [2019-11-28 17:29:47,316 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 17:29:47,325 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 17:29:47,345 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 17:29:47,373 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 17:29:47,373 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 17:29:47,374 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 17:29:47,374 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 17:29:47,374 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 17:29:47,375 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 17:29:47,375 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 17:29:47,375 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 17:29:47,396 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-28 17:29:47,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 17:29:47,404 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:47,405 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:47,406 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:47,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:47,414 INFO L82 PathProgramCache]: Analyzing trace with hash 2105267373, now seen corresponding path program 1 times [2019-11-28 17:29:47,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:47,426 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187919633] [2019-11-28 17:29:47,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:29:47,693 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187919633] [2019-11-28 17:29:47,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:29:47,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-28 17:29:47,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927285708] [2019-11-28 17:29:47,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 17:29:47,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:47,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 17:29:47,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-28 17:29:47,727 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 7 states. [2019-11-28 17:29:47,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:47,845 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-11-28 17:29:47,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:29:47,847 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-28 17:29:47,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:47,862 INFO L225 Difference]: With dead ends: 30 [2019-11-28 17:29:47,862 INFO L226 Difference]: Without dead ends: 20 [2019-11-28 17:29:47,865 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-28 17:29:47,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-28 17:29:47,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-28 17:29:47,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-28 17:29:47,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-28 17:29:47,908 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2019-11-28 17:29:47,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:47,909 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-28 17:29:47,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 17:29:47,909 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-28 17:29:47,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-28 17:29:47,911 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:47,911 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:47,912 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:47,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:47,912 INFO L82 PathProgramCache]: Analyzing trace with hash -131148366, now seen corresponding path program 1 times [2019-11-28 17:29:47,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:47,913 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629277525] [2019-11-28 17:29:47,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:48,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:29:48,084 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629277525] [2019-11-28 17:29:48,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:29:48,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-28 17:29:48,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062866930] [2019-11-28 17:29:48,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-28 17:29:48,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:48,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-28 17:29:48,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-11-28 17:29:48,089 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 9 states. [2019-11-28 17:29:48,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:48,219 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2019-11-28 17:29:48,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 17:29:48,220 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2019-11-28 17:29:48,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:48,221 INFO L225 Difference]: With dead ends: 29 [2019-11-28 17:29:48,221 INFO L226 Difference]: Without dead ends: 25 [2019-11-28 17:29:48,222 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-11-28 17:29:48,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-28 17:29:48,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-11-28 17:29:48,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 17:29:48,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-11-28 17:29:48,230 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2019-11-28 17:29:48,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:48,230 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-11-28 17:29:48,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-28 17:29:48,230 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-11-28 17:29:48,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-28 17:29:48,231 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:48,232 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:48,232 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:48,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:48,232 INFO L82 PathProgramCache]: Analyzing trace with hash -132605643, now seen corresponding path program 1 times [2019-11-28 17:29:48,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:48,233 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407272217] [2019-11-28 17:29:48,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:48,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 17:29:48,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407272217] [2019-11-28 17:29:48,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894076095] [2019-11-28 17:29:48,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:48,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:48,518 INFO L264 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 17:29:48,527 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:48,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 17:29:48,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:48,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2019-11-28 17:29:48,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457738099] [2019-11-28 17:29:48,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-28 17:29:48,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:48,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-28 17:29:48,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-11-28 17:29:48,642 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 13 states. [2019-11-28 17:29:48,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:48,781 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2019-11-28 17:29:48,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 17:29:48,782 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2019-11-28 17:29:48,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:48,784 INFO L225 Difference]: With dead ends: 35 [2019-11-28 17:29:48,784 INFO L226 Difference]: Without dead ends: 31 [2019-11-28 17:29:48,785 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-11-28 17:29:48,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-28 17:29:48,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2019-11-28 17:29:48,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 17:29:48,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-11-28 17:29:48,792 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2019-11-28 17:29:48,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:48,793 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-11-28 17:29:48,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-28 17:29:48,793 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-11-28 17:29:48,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-28 17:29:48,794 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:48,795 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:48,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:48,999 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:48,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:49,000 INFO L82 PathProgramCache]: Analyzing trace with hash -614490246, now seen corresponding path program 1 times [2019-11-28 17:29:49,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:49,009 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935628794] [2019-11-28 17:29:49,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:49,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:49,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 17:29:49,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935628794] [2019-11-28 17:29:49,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675637317] [2019-11-28 17:29:49,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:49,319 INFO L264 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 17:29:49,322 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:49,426 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 17:29:49,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:49,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 14 [2019-11-28 17:29:49,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009516102] [2019-11-28 17:29:49,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-28 17:29:49,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:49,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 17:29:49,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-11-28 17:29:49,430 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 14 states. [2019-11-28 17:29:49,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:49,573 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2019-11-28 17:29:49,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 17:29:49,574 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2019-11-28 17:29:49,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:49,577 INFO L225 Difference]: With dead ends: 41 [2019-11-28 17:29:49,579 INFO L226 Difference]: Without dead ends: 37 [2019-11-28 17:29:49,580 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2019-11-28 17:29:49,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-28 17:29:49,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2019-11-28 17:29:49,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-28 17:29:49,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-11-28 17:29:49,597 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 27 [2019-11-28 17:29:49,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:49,598 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-11-28 17:29:49,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-28 17:29:49,600 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-11-28 17:29:49,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-28 17:29:49,602 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:49,602 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:49,814 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:49,815 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:49,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:49,816 INFO L82 PathProgramCache]: Analyzing trace with hash -2127867459, now seen corresponding path program 2 times [2019-11-28 17:29:49,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:49,816 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253221620] [2019-11-28 17:29:49,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:49,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:50,047 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-28 17:29:50,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253221620] [2019-11-28 17:29:50,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405144794] [2019-11-28 17:29:50,048 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:50,083 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:29:50,084 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:29:50,085 INFO L264 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 17:29:50,088 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-28 17:29:50,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:50,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2019-11-28 17:29:50,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458436015] [2019-11-28 17:29:50,168 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-28 17:29:50,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:50,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-28 17:29:50,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2019-11-28 17:29:50,172 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 15 states. [2019-11-28 17:29:50,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:50,343 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2019-11-28 17:29:50,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 17:29:50,344 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2019-11-28 17:29:50,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:50,345 INFO L225 Difference]: With dead ends: 47 [2019-11-28 17:29:50,346 INFO L226 Difference]: Without dead ends: 43 [2019-11-28 17:29:50,347 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2019-11-28 17:29:50,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-28 17:29:50,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2019-11-28 17:29:50,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-28 17:29:50,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-11-28 17:29:50,362 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 33 [2019-11-28 17:29:50,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:50,363 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-11-28 17:29:50,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-28 17:29:50,363 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-11-28 17:29:50,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-28 17:29:50,364 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:50,365 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:50,576 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:50,576 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:50,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:50,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1002836670, now seen corresponding path program 2 times [2019-11-28 17:29:50,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:50,577 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633603855] [2019-11-28 17:29:50,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 17:29:50,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 17:29:50,616 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 17:29:50,617 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 17:29:50,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:29:50 BoogieIcfgContainer [2019-11-28 17:29:50,652 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 17:29:50,652 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 17:29:50,652 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 17:29:50,653 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 17:29:50,653 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:29:47" (3/4) ... [2019-11-28 17:29:50,655 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 17:29:50,703 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 17:29:50,703 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 17:29:50,706 INFO L168 Benchmark]: Toolchain (without parser) took 4001.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 956.3 MB in the beginning and 891.3 MB in the end (delta: 65.0 MB). Peak memory consumption was 206.0 MB. Max. memory is 11.5 GB. [2019-11-28 17:29:50,707 INFO L168 Benchmark]: CDTParser took 0.83 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:29:50,708 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.05 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 945.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:29:50,708 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.83 ms. Allocated memory is still 1.0 GB. Free memory is still 945.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:29:50,709 INFO L168 Benchmark]: Boogie Preprocessor took 85.77 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -185.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 17:29:50,709 INFO L168 Benchmark]: RCFGBuilder took 214.68 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 11.5 GB. [2019-11-28 17:29:50,710 INFO L168 Benchmark]: TraceAbstraction took 3353.87 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 891.3 MB in the end (delta: 228.4 MB). Peak memory consumption was 228.4 MB. Max. memory is 11.5 GB. [2019-11-28 17:29:50,710 INFO L168 Benchmark]: Witness Printer took 51.23 ms. Allocated memory is still 1.2 GB. Free memory is still 891.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:29:50,715 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.83 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 258.05 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 945.6 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 32.83 ms. Allocated memory is still 1.0 GB. Free memory is still 945.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 85.77 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -185.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 214.68 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3353.87 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 891.3 MB in the end (delta: 228.4 MB). Peak memory consumption was 228.4 MB. Max. memory is 11.5 GB. * Witness Printer took 51.23 ms. Allocated memory is still 1.2 GB. Free memory is still 891.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 21]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L18] int input = 5; [L19] CALL, EXPR id(input) VAL [\old(x)=5] [L8] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L9] CALL, EXPR id2(x-1) VAL [\old(x)=4] [L13] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L14] CALL, EXPR id(x-1) VAL [\old(x)=3] [L8] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L9] CALL, EXPR id2(x-1) VAL [\old(x)=2] [L13] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L14] CALL, EXPR id(x-1) VAL [\old(x)=1] [L8] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L9] CALL, EXPR id2(x-1) VAL [\old(x)=0] [L13] COND TRUE x==0 [L13] return 0; VAL [\old(x)=0, \result=0, x=0] [L9] RET, EXPR id2(x-1) VAL [\old(x)=1, id2(x-1)=0, x=1] [L9] return id2(x-1) + 1; [L14] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L14] return id(x-1) + 1; [L9] RET, EXPR id2(x-1) VAL [\old(x)=3, id2(x-1)=2, x=3] [L9] return id2(x-1) + 1; [L14] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L14] return id(x-1) + 1; [L9] RET, EXPR id2(x-1) VAL [\old(x)=5, id2(x-1)=4, x=5] [L9] return id2(x-1) + 1; [L19] RET, EXPR id(input) [L19] int result = id(input); [L20] COND TRUE result == 5 [L21] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 21 locations, 1 error locations. Result: UNSAFE, OverallTime: 3.2s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 71 SDtfs, 103 SDslu, 398 SDs, 0 SdLazy, 317 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 158 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 26 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 225 NumberOfCodeBlocks, 225 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 178 ConstructedInterpolants, 0 QuantifiedInterpolants, 11512 SizeOfPredicates, 15 NumberOfNonLiveVariables, 198 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 34/68 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...