./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i --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/list-ext3-properties/sll_length_check-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2a99c5e1922c5e2d2ce50e982def02dab2dbd81e ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 17:02:28,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 17:02:28,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 17:02:28,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 17:02:28,432 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 17:02:28,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 17:02:28,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 17:02:28,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 17:02:28,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 17:02:28,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 17:02:28,459 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 17:02:28,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 17:02:28,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 17:02:28,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 17:02:28,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 17:02:28,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 17:02:28,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 17:02:28,471 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 17:02:28,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 17:02:28,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 17:02:28,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 17:02:28,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 17:02:28,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 17:02:28,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 17:02:28,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 17:02:28,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 17:02:28,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 17:02:28,496 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 17:02:28,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 17:02:28,498 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 17:02:28,498 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 17:02:28,499 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 17:02:28,500 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 17:02:28,501 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 17:02:28,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 17:02:28,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 17:02:28,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 17:02:28,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 17:02:28,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 17:02:28,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 17:02:28,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 17:02:28,509 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 17:02:28,544 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 17:02:28,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 17:02:28,546 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 17:02:28,549 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 17:02:28,550 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 17:02:28,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 17:02:28,550 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 17:02:28,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 17:02:28,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 17:02:28,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 17:02:28,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 17:02:28,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 17:02:28,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 17:02:28,553 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 17:02:28,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 17:02:28,554 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 17:02:28,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 17:02:28,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 17:02:28,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 17:02:28,555 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 17:02:28,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 17:02:28,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:02:28,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 17:02:28,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 17:02:28,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 17:02:28,557 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 17:02:28,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 17:02:28,558 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 17:02:28,558 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 17:02:28,558 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 -> 2a99c5e1922c5e2d2ce50e982def02dab2dbd81e [2019-11-28 17:02:28,867 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 17:02:28,890 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 17:02:28,894 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 17:02:28,895 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 17:02:28,896 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 17:02:28,897 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i [2019-11-28 17:02:28,971 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/513d87bc1/7e2338efc0904b92832c23425841a8f7/FLAG0d0314c8f [2019-11-28 17:02:29,484 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 17:02:29,485 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i [2019-11-28 17:02:29,498 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/513d87bc1/7e2338efc0904b92832c23425841a8f7/FLAG0d0314c8f [2019-11-28 17:02:29,862 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/513d87bc1/7e2338efc0904b92832c23425841a8f7 [2019-11-28 17:02:29,865 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 17:02:29,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 17:02:29,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 17:02:29,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 17:02:29,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 17:02:29,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:02:29" (1/1) ... [2019-11-28 17:02:29,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34cffb93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:29, skipping insertion in model container [2019-11-28 17:02:29,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:02:29" (1/1) ... [2019-11-28 17:02:29,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 17:02:29,933 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 17:02:30,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:02:30,370 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 17:02:30,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:02:30,476 INFO L208 MainTranslator]: Completed translation [2019-11-28 17:02:30,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:30 WrapperNode [2019-11-28 17:02:30,477 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 17:02:30,479 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 17:02:30,479 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 17:02:30,480 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 17:02:30,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:30" (1/1) ... [2019-11-28 17:02:30,507 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:30" (1/1) ... [2019-11-28 17:02:30,529 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 17:02:30,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 17:02:30,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 17:02:30,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 17:02:30,539 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:30" (1/1) ... [2019-11-28 17:02:30,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:30" (1/1) ... [2019-11-28 17:02:30,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:30" (1/1) ... [2019-11-28 17:02:30,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:30" (1/1) ... [2019-11-28 17:02:30,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:30" (1/1) ... [2019-11-28 17:02:30,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:30" (1/1) ... [2019-11-28 17:02:30,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:30" (1/1) ... [2019-11-28 17:02:30,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 17:02:30,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 17:02:30,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 17:02:30,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 17:02:30,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:30" (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 17:02:30,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-28 17:02:30,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-28 17:02:30,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-28 17:02:30,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 17:02:30,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 17:02:30,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 17:02:30,973 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 17:02:30,973 INFO L287 CfgBuilder]: Removed 16 assume(true) statements. [2019-11-28 17:02:30,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:02:30 BoogieIcfgContainer [2019-11-28 17:02:30,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 17:02:30,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 17:02:30,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 17:02:30,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 17:02:30,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:02:29" (1/3) ... [2019-11-28 17:02:30,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f1c8cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:02:30, skipping insertion in model container [2019-11-28 17:02:30,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:30" (2/3) ... [2019-11-28 17:02:30,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f1c8cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:02:30, skipping insertion in model container [2019-11-28 17:02:30,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:02:30" (3/3) ... [2019-11-28 17:02:30,983 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2019-11-28 17:02:30,991 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 17:02:30,998 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 17:02:31,007 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 17:02:31,026 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 17:02:31,026 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 17:02:31,027 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 17:02:31,027 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 17:02:31,027 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 17:02:31,028 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 17:02:31,028 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 17:02:31,028 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 17:02:31,041 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-28 17:02:31,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-28 17:02:31,048 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:02:31,048 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:02:31,049 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:02:31,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:02:31,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1050078975, now seen corresponding path program 1 times [2019-11-28 17:02:31,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:02:31,061 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401496367] [2019-11-28 17:02:31,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:02:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:02:31,184 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 17:02:31,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401496367] [2019-11-28 17:02:31,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:02:31,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 17:02:31,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139589816] [2019-11-28 17:02:31,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 17:02:31,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:02:31,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 17:02:31,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 17:02:31,215 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2019-11-28 17:02:31,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:02:31,249 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2019-11-28 17:02:31,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 17:02:31,252 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-11-28 17:02:31,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:02:31,264 INFO L225 Difference]: With dead ends: 41 [2019-11-28 17:02:31,264 INFO L226 Difference]: Without dead ends: 17 [2019-11-28 17:02:31,269 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 17:02:31,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-28 17:02:31,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-28 17:02:31,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 17:02:31,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-11-28 17:02:31,321 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2019-11-28 17:02:31,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:02:31,322 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-11-28 17:02:31,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 17:02:31,323 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2019-11-28 17:02:31,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-28 17:02:31,323 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:02:31,324 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:02:31,324 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:02:31,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:02:31,325 INFO L82 PathProgramCache]: Analyzing trace with hash 924106356, now seen corresponding path program 1 times [2019-11-28 17:02:31,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:02:31,326 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000812234] [2019-11-28 17:02:31,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:02:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:02:31,474 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 17:02:31,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000812234] [2019-11-28 17:02:31,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:02:31,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 17:02:31,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057650073] [2019-11-28 17:02:31,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 17:02:31,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:02:31,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 17:02:31,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 17:02:31,479 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 4 states. [2019-11-28 17:02:31,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:02:31,518 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2019-11-28 17:02:31,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 17:02:31,519 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-28 17:02:31,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:02:31,520 INFO L225 Difference]: With dead ends: 28 [2019-11-28 17:02:31,520 INFO L226 Difference]: Without dead ends: 20 [2019-11-28 17:02:31,522 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 17:02:31,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-28 17:02:31,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2019-11-28 17:02:31,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-28 17:02:31,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2019-11-28 17:02:31,529 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 14 [2019-11-28 17:02:31,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:02:31,529 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2019-11-28 17:02:31,529 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 17:02:31,530 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2019-11-28 17:02:31,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-28 17:02:31,531 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:02:31,531 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:02:31,531 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:02:31,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:02:31,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1149244957, now seen corresponding path program 1 times [2019-11-28 17:02:31,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:02:31,533 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760946272] [2019-11-28 17:02:31,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:02:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:02:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:02:31,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760946272] [2019-11-28 17:02:31,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:02:31,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-28 17:02:31,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106570463] [2019-11-28 17:02:31,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 17:02:31,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:02:31,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 17:02:31,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-28 17:02:31,635 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 6 states. [2019-11-28 17:02:31,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:02:31,732 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2019-11-28 17:02:31,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 17:02:31,733 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-28 17:02:31,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:02:31,734 INFO L225 Difference]: With dead ends: 26 [2019-11-28 17:02:31,734 INFO L226 Difference]: Without dead ends: 21 [2019-11-28 17:02:31,735 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-28 17:02:31,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-28 17:02:31,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2019-11-28 17:02:31,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-28 17:02:31,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2019-11-28 17:02:31,750 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 17 [2019-11-28 17:02:31,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:02:31,751 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-11-28 17:02:31,751 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 17:02:31,752 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2019-11-28 17:02:31,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-28 17:02:31,753 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:02:31,753 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:02:31,753 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:02:31,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:02:31,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1318509563, now seen corresponding path program 1 times [2019-11-28 17:02:31,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:02:31,755 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717860093] [2019-11-28 17:02:31,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:02:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:02:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:02:31,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717860093] [2019-11-28 17:02:31,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833318656] [2019-11-28 17:02:31,898 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 17:02:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:02:31,987 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-28 17:02:31,994 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:02:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:02:32,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:02:32,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-28 17:02:32,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819285752] [2019-11-28 17:02:32,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 17:02:32,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:02:32,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 17:02:32,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-28 17:02:32,036 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 6 states. [2019-11-28 17:02:32,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:02:32,094 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-11-28 17:02:32,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:02:32,094 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-11-28 17:02:32,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:02:32,095 INFO L225 Difference]: With dead ends: 33 [2019-11-28 17:02:32,095 INFO L226 Difference]: Without dead ends: 24 [2019-11-28 17:02:32,096 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-28 17:02:32,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-28 17:02:32,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2019-11-28 17:02:32,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-28 17:02:32,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-11-28 17:02:32,103 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2019-11-28 17:02:32,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:02:32,103 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-11-28 17:02:32,104 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 17:02:32,104 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-11-28 17:02:32,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-28 17:02:32,105 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:02:32,105 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:02:32,310 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:02:32,311 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:02:32,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:02:32,312 INFO L82 PathProgramCache]: Analyzing trace with hash -2117322972, now seen corresponding path program 2 times [2019-11-28 17:02:32,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:02:32,313 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770429621] [2019-11-28 17:02:32,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:02:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:02:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:02:32,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770429621] [2019-11-28 17:02:32,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894506207] [2019-11-28 17:02:32,430 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 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 17:02:32,503 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:02:32,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:02:32,506 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 17:02:32,510 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:02:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:02:32,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:02:32,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-28 17:02:32,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449887150] [2019-11-28 17:02:32,589 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-28 17:02:32,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:02:32,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 17:02:32,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2019-11-28 17:02:32,593 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 12 states. [2019-11-28 17:02:32,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:02:32,894 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2019-11-28 17:02:32,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 17:02:32,895 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2019-11-28 17:02:32,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:02:32,896 INFO L225 Difference]: With dead ends: 35 [2019-11-28 17:02:32,896 INFO L226 Difference]: Without dead ends: 26 [2019-11-28 17:02:32,897 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2019-11-28 17:02:32,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-28 17:02:32,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-28 17:02:32,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 17:02:32,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-11-28 17:02:32,904 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2019-11-28 17:02:32,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:02:32,904 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-11-28 17:02:32,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-28 17:02:32,905 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-11-28 17:02:32,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-28 17:02:32,906 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:02:32,906 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:02:33,113 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:02:33,114 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:02:33,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:02:33,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1344305789, now seen corresponding path program 3 times [2019-11-28 17:02:33,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:02:33,115 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390731106] [2019-11-28 17:02:33,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:02:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:02:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:02:33,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390731106] [2019-11-28 17:02:33,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018688844] [2019-11-28 17:02:33,376 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 17:02:33,443 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-28 17:02:33,444 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:02:33,445 INFO L264 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-28 17:02:33,447 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:02:33,600 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-28 17:02:33,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:02:33,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2019-11-28 17:02:33,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995684815] [2019-11-28 17:02:33,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-28 17:02:33,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:02:33,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-28 17:02:33,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2019-11-28 17:02:33,603 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 18 states. [2019-11-28 17:02:34,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:02:34,754 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2019-11-28 17:02:34,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-28 17:02:34,755 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2019-11-28 17:02:34,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:02:34,756 INFO L225 Difference]: With dead ends: 61 [2019-11-28 17:02:34,757 INFO L226 Difference]: Without dead ends: 56 [2019-11-28 17:02:34,759 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=270, Invalid=920, Unknown=0, NotChecked=0, Total=1190 [2019-11-28 17:02:34,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-28 17:02:34,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 27. [2019-11-28 17:02:34,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-28 17:02:34,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-11-28 17:02:34,775 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 25 [2019-11-28 17:02:34,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:02:34,777 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-11-28 17:02:34,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-28 17:02:34,778 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-11-28 17:02:34,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-28 17:02:34,779 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:02:34,779 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:02:34,991 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:02:34,992 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:02:34,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:02:34,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1224539237, now seen corresponding path program 4 times [2019-11-28 17:02:34,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:02:34,994 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915705979] [2019-11-28 17:02:34,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:02:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 17:02:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 17:02:35,095 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 17:02:35,096 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 17:02:35,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:02:35 BoogieIcfgContainer [2019-11-28 17:02:35,142 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 17:02:35,143 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 17:02:35,143 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 17:02:35,143 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 17:02:35,144 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:02:30" (3/4) ... [2019-11-28 17:02:35,146 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 17:02:35,212 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 17:02:35,213 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 17:02:35,216 INFO L168 Benchmark]: Toolchain (without parser) took 5348.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 213.4 MB). Free memory was 960.4 MB in the beginning and 1.1 GB in the end (delta: -175.4 MB). Peak memory consumption was 38.0 MB. Max. memory is 11.5 GB. [2019-11-28 17:02:35,216 INFO L168 Benchmark]: CDTParser took 0.86 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 17:02:35,217 INFO L168 Benchmark]: CACSL2BoogieTranslator took 611.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 960.4 MB in the beginning and 1.1 GB in the end (delta: -165.3 MB). Peak memory consumption was 25.9 MB. Max. memory is 11.5 GB. [2019-11-28 17:02:35,218 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.87 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-28 17:02:35,218 INFO L168 Benchmark]: Boogie Preprocessor took 30.17 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:02:35,219 INFO L168 Benchmark]: RCFGBuilder took 415.75 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: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. [2019-11-28 17:02:35,220 INFO L168 Benchmark]: TraceAbstraction took 4166.30 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 69.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -41.1 MB). Peak memory consumption was 28.1 MB. Max. memory is 11.5 GB. [2019-11-28 17:02:35,221 INFO L168 Benchmark]: Witness Printer took 70.08 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:02:35,225 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.86 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 611.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 960.4 MB in the beginning and 1.1 GB in the end (delta: -165.3 MB). Peak memory consumption was 25.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 49.87 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 30.17 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 415.75 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: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4166.30 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 69.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -41.1 MB). Peak memory consumption was 28.1 MB. Max. memory is 11.5 GB. * Witness Printer took 70.08 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L592] int len = 2; [L593] len < 32 && __VERIFIER_nondet_int() [L593] len < 32 && __VERIFIER_nondet_int() [L593] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L564] SLL head = ((void *)0); [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND FALSE !(len > 0) [L574] return head; [L596] SLL s = sll_create(len + 1); [L577] int len = 0; [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND FALSE !(\read(head)) [L582] return len; [L597] COND TRUE len != sll_length(s) [L602] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 1 error locations. Result: UNSAFE, OverallTime: 4.0s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 94 SDtfs, 258 SDslu, 250 SDs, 0 SdLazy, 396 SolverSat, 87 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 127 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=6, 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, 6 MinimizatonAttempts, 35 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 197 NumberOfCodeBlocks, 191 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 162 ConstructedInterpolants, 0 QuantifiedInterpolants, 10774 SizeOfPredicates, 8 NumberOfNonLiveVariables, 281 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 21/47 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...