./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/list-properties/simple_false-unreach-call_false-valid-memcleanup.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0ed9222f Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/svcomp/c/list-properties/simple_false-unreach-call_false-valid-memcleanup.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 7716826f9b443d6310df8de2d829a4d2f71b85a7 .................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-0ed9222-m [2019-01-14 15:37:40,213 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-14 15:37:40,217 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-14 15:37:40,235 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-14 15:37:40,235 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-14 15:37:40,236 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-14 15:37:40,238 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-14 15:37:40,239 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-14 15:37:40,241 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-14 15:37:40,242 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-14 15:37:40,242 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-01-14 15:37:40,243 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-01-14 15:37:40,244 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-01-14 15:37:40,244 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-01-14 15:37:40,245 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-01-14 15:37:40,246 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-01-14 15:37:40,247 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-01-14 15:37:40,249 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-01-14 15:37:40,251 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-01-14 15:37:40,253 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-01-14 15:37:40,254 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-01-14 15:37:40,255 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-01-14 15:37:40,258 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-01-14 15:37:40,258 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-01-14 15:37:40,258 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-01-14 15:37:40,259 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-01-14 15:37:40,261 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-01-14 15:37:40,261 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-01-14 15:37:40,262 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-01-14 15:37:40,264 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-01-14 15:37:40,264 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-01-14 15:37:40,265 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-01-14 15:37:40,265 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-01-14 15:37:40,265 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-01-14 15:37:40,267 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-01-14 15:37:40,268 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-01-14 15:37:40,268 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-01-14 15:37:40,294 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-14 15:37:40,294 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-14 15:37:40,298 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-14 15:37:40,298 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-14 15:37:40,298 INFO L133 SettingsManager]: * Use SBE=true [2019-01-14 15:37:40,299 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-14 15:37:40,299 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-14 15:37:40,299 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-14 15:37:40,299 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-14 15:37:40,299 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-14 15:37:40,299 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-14 15:37:40,300 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-14 15:37:40,300 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-14 15:37:40,300 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-14 15:37:40,300 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-14 15:37:40,300 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-14 15:37:40,301 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-14 15:37:40,303 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-14 15:37:40,303 INFO L133 SettingsManager]: * To the following directory=./dump/ [2019-01-14 15:37:40,303 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-14 15:37:40,303 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-14 15:37:40,304 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-14 15:37:40,304 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-14 15:37:40,304 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-14 15:37:40,304 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2019-01-14 15:37:40,304 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-14 15:37:40,304 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-14 15:37:40,305 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7716826f9b443d6310df8de2d829a4d2f71b85a7 [2019-01-14 15:37:40,360 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-14 15:37:40,376 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-14 15:37:40,383 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-14 15:37:40,385 INFO L271 PluginConnector]: Initializing CDTParser... [2019-01-14 15:37:40,385 INFO L276 PluginConnector]: CDTParser initialized [2019-01-14 15:37:40,386 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/list-properties/simple_false-unreach-call_false-valid-memcleanup.i [2019-01-14 15:37:40,450 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90dbd12f8/7accfcbbde2d46e6b487b7ef0fd7f48c/FLAG2da0fe504 [2019-01-14 15:37:40,929 INFO L307 CDTParser]: Found 1 translation units. [2019-01-14 15:37:40,930 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/list-properties/simple_false-unreach-call_false-valid-memcleanup.i [2019-01-14 15:37:40,944 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90dbd12f8/7accfcbbde2d46e6b487b7ef0fd7f48c/FLAG2da0fe504 [2019-01-14 15:37:41,235 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90dbd12f8/7accfcbbde2d46e6b487b7ef0fd7f48c [2019-01-14 15:37:41,238 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-14 15:37:41,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-01-14 15:37:41,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-01-14 15:37:41,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-01-14 15:37:41,247 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2019-01-14 15:37:41,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.01 03:37:41" (1/1) ... [2019-01-14 15:37:41,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b942bcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 03:37:41, skipping insertion in model container [2019-01-14 15:37:41,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.01 03:37:41" (1/1) ... [2019-01-14 15:37:41,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-01-14 15:37:41,313 INFO L176 MainTranslator]: Built tables and reachable declarations [2019-01-14 15:37:41,698 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-14 15:37:41,719 INFO L191 MainTranslator]: Completed pre-run [2019-01-14 15:37:41,850 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-14 15:37:41,927 INFO L195 MainTranslator]: Completed translation [2019-01-14 15:37:41,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 03:37:41 WrapperNode [2019-01-14 15:37:41,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-01-14 15:37:41,929 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-14 15:37:41,929 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-14 15:37:41,929 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-14 15:37:41,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 03:37:41" (1/1) ... [2019-01-14 15:37:41,966 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 03:37:41" (1/1) ... [2019-01-14 15:37:41,994 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-14 15:37:41,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-14 15:37:41,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-14 15:37:41,995 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-14 15:37:42,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 03:37:41" (1/1) ... [2019-01-14 15:37:42,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 03:37:41" (1/1) ... [2019-01-14 15:37:42,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 03:37:41" (1/1) ... [2019-01-14 15:37:42,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 03:37:41" (1/1) ... [2019-01-14 15:37:42,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 03:37:41" (1/1) ... [2019-01-14 15:37:42,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 03:37:41" (1/1) ... [2019-01-14 15:37:42,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 03:37:41" (1/1) ... [2019-01-14 15:37:42,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-14 15:37:42,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-14 15:37:42,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-14 15:37:42,058 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-14 15:37:42,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 03:37:41" (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 [2019-01-14 15:37:42,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-01-14 15:37:42,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-01-14 15:37:42,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-01-14 15:37:42,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-01-14 15:37:42,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-01-14 15:37:42,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-14 15:37:42,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-14 15:37:42,507 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-14 15:37:42,507 INFO L286 CfgBuilder]: Removed 10 assue(true) statements. [2019-01-14 15:37:42,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.01 03:37:42 BoogieIcfgContainer [2019-01-14 15:37:42,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-14 15:37:42,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-14 15:37:42,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-14 15:37:42,513 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-14 15:37:42,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.01 03:37:41" (1/3) ... [2019-01-14 15:37:42,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12473a4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.01 03:37:42, skipping insertion in model container [2019-01-14 15:37:42,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 03:37:41" (2/3) ... [2019-01-14 15:37:42,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12473a4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.01 03:37:42, skipping insertion in model container [2019-01-14 15:37:42,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.01 03:37:42" (3/3) ... [2019-01-14 15:37:42,516 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_false-unreach-call_false-valid-memcleanup.i [2019-01-14 15:37:42,526 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-14 15:37:42,536 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-01-14 15:37:42,552 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-01-14 15:37:42,580 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2019-01-14 15:37:42,581 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-14 15:37:42,581 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-14 15:37:42,581 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-14 15:37:42,581 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-14 15:37:42,582 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-14 15:37:42,582 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-14 15:37:42,582 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-14 15:37:42,582 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-14 15:37:42,596 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-01-14 15:37:42,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-01-14 15:37:42,603 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 15:37:42,604 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 15:37:42,606 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 15:37:42,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 15:37:42,611 INFO L82 PathProgramCache]: Analyzing trace with hash 2114193284, now seen corresponding path program 1 times [2019-01-14 15:37:42,613 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 15:37:42,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 15:37:42,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 15:37:42,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 15:37:42,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 15:37:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 15:37:42,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-14 15:37:42,731 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-14 15:37:42,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-14 15:37:42,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-01-14 15:37:42,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-01-14 15:37:42,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-01-14 15:37:42,750 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-01-14 15:37:42,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 15:37:42,768 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2019-01-14 15:37:42,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-01-14 15:37:42,769 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-01-14 15:37:42,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 15:37:42,780 INFO L225 Difference]: With dead ends: 30 [2019-01-14 15:37:42,780 INFO L226 Difference]: Without dead ends: 14 [2019-01-14 15:37:42,785 INFO L631 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 [2019-01-14 15:37:42,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-01-14 15:37:42,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-01-14 15:37:42,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-01-14 15:37:42,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-01-14 15:37:42,830 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-01-14 15:37:42,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 15:37:42,831 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-01-14 15:37:42,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-01-14 15:37:42,832 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-01-14 15:37:42,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-01-14 15:37:42,833 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 15:37:42,833 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 15:37:42,834 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 15:37:42,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 15:37:42,835 INFO L82 PathProgramCache]: Analyzing trace with hash 672844787, now seen corresponding path program 1 times [2019-01-14 15:37:42,837 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 15:37:42,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 15:37:42,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 15:37:42,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 15:37:42,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 15:37:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 15:37:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-14 15:37:43,201 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-14 15:37:43,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-01-14 15:37:43,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-01-14 15:37:43,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-01-14 15:37:43,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-01-14 15:37:43,203 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2019-01-14 15:37:43,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 15:37:43,549 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2019-01-14 15:37:43,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-14 15:37:43,550 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-01-14 15:37:43,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 15:37:43,551 INFO L225 Difference]: With dead ends: 29 [2019-01-14 15:37:43,551 INFO L226 Difference]: Without dead ends: 27 [2019-01-14 15:37:43,552 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-01-14 15:37:43,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-01-14 15:37:43,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2019-01-14 15:37:43,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-01-14 15:37:43,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-01-14 15:37:43,558 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 10 [2019-01-14 15:37:43,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 15:37:43,558 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-01-14 15:37:43,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-01-14 15:37:43,559 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-01-14 15:37:43,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-01-14 15:37:43,559 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 15:37:43,559 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 15:37:43,560 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 15:37:43,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 15:37:43,560 INFO L82 PathProgramCache]: Analyzing trace with hash 111486456, now seen corresponding path program 1 times [2019-01-14 15:37:43,560 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 15:37:43,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 15:37:43,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 15:37:43,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 15:37:43,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 15:37:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 15:37:43,845 WARN L181 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2019-01-14 15:37:43,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-14 15:37:43,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-14 15:37:43,947 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-14 15:37:43,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 15:37:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 15:37:43,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-14 15:37:44,111 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2019-01-14 15:37:44,131 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2019-01-14 15:37:44,131 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-14 15:37:44,155 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-14 15:37:44,194 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2019-01-14 15:37:44,200 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2019-01-14 15:37:44,201 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-14 15:37:44,206 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-14 15:37:44,303 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-01-14 15:37:44,304 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-01-14 15:37:44,331 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-01-14 15:37:44,334 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2019-01-14 15:37:44,335 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-14 15:37:44,341 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-14 15:37:44,352 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-01-14 15:37:44,359 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2019-01-14 15:37:44,360 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-14 15:37:44,363 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-14 15:37:44,374 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-01-14 15:37:44,374 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2019-01-14 15:37:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-14 15:37:44,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-01-14 15:37:44,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-01-14 15:37:44,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-14 15:37:44,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-14 15:37:44,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-01-14 15:37:44,414 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2019-01-14 15:37:44,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 15:37:44,604 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-01-14 15:37:44,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-14 15:37:44,605 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-01-14 15:37:44,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 15:37:44,605 INFO L225 Difference]: With dead ends: 33 [2019-01-14 15:37:44,606 INFO L226 Difference]: Without dead ends: 23 [2019-01-14 15:37:44,606 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-01-14 15:37:44,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-01-14 15:37:44,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2019-01-14 15:37:44,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-01-14 15:37:44,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-01-14 15:37:44,610 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2019-01-14 15:37:44,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 15:37:44,610 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-01-14 15:37:44,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-14 15:37:44,610 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-01-14 15:37:44,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-01-14 15:37:44,611 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 15:37:44,611 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 15:37:44,611 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 15:37:44,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 15:37:44,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1682540518, now seen corresponding path program 1 times [2019-01-14 15:37:44,612 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 15:37:44,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 15:37:44,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 15:37:44,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 15:37:44,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 15:37:44,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 15:37:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 15:37:44,684 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2019-01-14 15:37:44,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.01 03:37:44 BoogieIcfgContainer [2019-01-14 15:37:44,724 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-01-14 15:37:44,724 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-01-14 15:37:44,725 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-01-14 15:37:44,725 INFO L276 PluginConnector]: Witness Printer initialized [2019-01-14 15:37:44,725 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.01 03:37:42" (3/4) ... [2019-01-14 15:37:44,727 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2019-01-14 15:37:44,776 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-01-14 15:37:44,776 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-01-14 15:37:44,777 INFO L168 Benchmark]: Toolchain (without parser) took 3537.94 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.6 MB). Free memory was 952.7 MB in the beginning and 970.3 MB in the end (delta: -17.6 MB). Peak memory consumption was 92.0 MB. Max. memory is 11.5 GB. [2019-01-14 15:37:44,778 INFO L168 Benchmark]: CDTParser took 0.85 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-14 15:37:44,778 INFO L168 Benchmark]: CACSL2BoogieTranslator took 687.93 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.6 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -136.8 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. [2019-01-14 15:37:44,779 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.37 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-14 15:37:44,779 INFO L168 Benchmark]: Boogie Preprocessor took 62.89 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-14 15:37:44,780 INFO L168 Benchmark]: RCFGBuilder took 450.89 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.7 MB). Peak memory consumption was 25.7 MB. Max. memory is 11.5 GB. [2019-01-14 15:37:44,780 INFO L168 Benchmark]: TraceAbstraction took 2214.32 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 970.3 MB in the end (delta: 88.1 MB). Peak memory consumption was 88.1 MB. Max. memory is 11.5 GB. [2019-01-14 15:37:44,781 INFO L168 Benchmark]: Witness Printer took 51.64 ms. Allocated memory is still 1.1 GB. Free memory is still 970.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-14 15:37:44,785 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.85 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 687.93 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.6 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -136.8 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 65.37 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 62.89 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 450.89 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.7 MB). Peak memory consumption was 25.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2214.32 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 970.3 MB in the end (delta: 88.1 MB). Peak memory consumption was 88.1 MB. Max. memory is 11.5 GB. * Witness Printer took 51.64 ms. Allocated memory is still 1.1 GB. Free memory is still 970.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 644]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L627] List a = (List) malloc(sizeof(struct node)); [L628] COND FALSE !(a == 0) [L629] List t; [L630] List p = a; [L631] a->h = 2 [L632] COND TRUE __VERIFIER_nondet_int() [L633] p->h = 1 [L634] t = (List) malloc(sizeof(struct node)) [L635] COND FALSE !(t == 0) [L636] p->n = t [L637] EXPR p->n [L637] p = p->n [L632] COND FALSE !(__VERIFIER_nondet_int()) [L639] p->h = 2 [L640] p->n = 0 [L641] p = a [L642] COND TRUE p!=0 [L643] EXPR p->h [L643] COND TRUE p->h != 2 [L644] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. UNSAFE Result, 2.1s OverallTime, 4 OverallIterations, 2 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 42 SDtfs, 39 SDslu, 47 SDs, 0 SdLazy, 58 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 15 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 59 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 41 ConstructedInterpolants, 0 QuantifiedInterpolants, 3067 SizeOfPredicates, 7 NumberOfNonLiveVariables, 54 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 2/4 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...