./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-properties/alternating_list-2.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-properties/alternating_list-2.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 9c54128245d3ab9ad313da188c7be33f66027c6a ............................................................................................................................................................................................................................................................................................................................. 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 16:56:32,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 16:56:32,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 16:56:32,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 16:56:32,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 16:56:32,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 16:56:32,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 16:56:32,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 16:56:32,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 16:56:32,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 16:56:32,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 16:56:32,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 16:56:32,186 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 16:56:32,189 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 16:56:32,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 16:56:32,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 16:56:32,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 16:56:32,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 16:56:32,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 16:56:32,199 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 16:56:32,201 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 16:56:32,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 16:56:32,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 16:56:32,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 16:56:32,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 16:56:32,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 16:56:32,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 16:56:32,208 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 16:56:32,208 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 16:56:32,209 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 16:56:32,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 16:56:32,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 16:56:32,212 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 16:56:32,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 16:56:32,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 16:56:32,214 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 16:56:32,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 16:56:32,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 16:56:32,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 16:56:32,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 16:56:32,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 16:56:32,218 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 16:56:32,233 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 16:56:32,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 16:56:32,234 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 16:56:32,235 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 16:56:32,235 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 16:56:32,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 16:56:32,236 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 16:56:32,236 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 16:56:32,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 16:56:32,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 16:56:32,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 16:56:32,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 16:56:32,237 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 16:56:32,238 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 16:56:32,238 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 16:56:32,238 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 16:56:32,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 16:56:32,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 16:56:32,239 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 16:56:32,239 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 16:56:32,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 16:56:32,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 16:56:32,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 16:56:32,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 16:56:32,241 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 16:56:32,241 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 16:56:32,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 16:56:32,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 16:56:32,242 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 16:56:32,242 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 -> 9c54128245d3ab9ad313da188c7be33f66027c6a [2019-11-28 16:56:32,532 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 16:56:32,549 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 16:56:32,553 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 16:56:32,555 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 16:56:32,555 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 16:56:32,556 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/alternating_list-2.i [2019-11-28 16:56:32,632 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/553b93077/ea5539cf82e1413182bc740b03b58650/FLAG117131550 [2019-11-28 16:56:33,180 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 16:56:33,180 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/alternating_list-2.i [2019-11-28 16:56:33,192 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/553b93077/ea5539cf82e1413182bc740b03b58650/FLAG117131550 [2019-11-28 16:56:33,438 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/553b93077/ea5539cf82e1413182bc740b03b58650 [2019-11-28 16:56:33,442 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 16:56:33,443 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 16:56:33,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 16:56:33,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 16:56:33,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 16:56:33,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:56:33" (1/1) ... [2019-11-28 16:56:33,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43c2c676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:33, skipping insertion in model container [2019-11-28 16:56:33,453 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:56:33" (1/1) ... [2019-11-28 16:56:33,461 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 16:56:33,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 16:56:33,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:56:33,974 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 16:56:34,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:56:34,072 INFO L208 MainTranslator]: Completed translation [2019-11-28 16:56:34,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:34 WrapperNode [2019-11-28 16:56:34,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 16:56:34,074 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 16:56:34,075 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 16:56:34,075 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 16:56:34,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:34" (1/1) ... [2019-11-28 16:56:34,102 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:34" (1/1) ... [2019-11-28 16:56:34,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 16:56:34,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 16:56:34,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 16:56:34,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 16:56:34,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:34" (1/1) ... [2019-11-28 16:56:34,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:34" (1/1) ... [2019-11-28 16:56:34,155 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:34" (1/1) ... [2019-11-28 16:56:34,155 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:34" (1/1) ... [2019-11-28 16:56:34,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:34" (1/1) ... [2019-11-28 16:56:34,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:34" (1/1) ... [2019-11-28 16:56:34,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:34" (1/1) ... [2019-11-28 16:56:34,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 16:56:34,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 16:56:34,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 16:56:34,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 16:56:34,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:34" (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 16:56:34,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 16:56:34,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 16:56:34,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-28 16:56:34,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-28 16:56:34,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-28 16:56:34,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 16:56:34,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 16:56:34,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 16:56:34,645 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 16:56:34,645 INFO L287 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-28 16:56:34,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:56:34 BoogieIcfgContainer [2019-11-28 16:56:34,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 16:56:34,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 16:56:34,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 16:56:34,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 16:56:34,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:56:33" (1/3) ... [2019-11-28 16:56:34,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f95687e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:56:34, skipping insertion in model container [2019-11-28 16:56:34,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:34" (2/3) ... [2019-11-28 16:56:34,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f95687e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:56:34, skipping insertion in model container [2019-11-28 16:56:34,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:56:34" (3/3) ... [2019-11-28 16:56:34,655 INFO L109 eAbstractionObserver]: Analyzing ICFG alternating_list-2.i [2019-11-28 16:56:34,663 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 16:56:34,671 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 16:56:34,684 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 16:56:34,704 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 16:56:34,704 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 16:56:34,704 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 16:56:34,705 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 16:56:34,705 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 16:56:34,705 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 16:56:34,705 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 16:56:34,705 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 16:56:34,719 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-28 16:56:34,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-28 16:56:34,726 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:56:34,727 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:56:34,728 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:56:34,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:56:34,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1953862777, now seen corresponding path program 1 times [2019-11-28 16:56:34,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:56:34,743 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927891752] [2019-11-28 16:56:34,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:56:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:56:34,883 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 16:56:34,884 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927891752] [2019-11-28 16:56:34,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:56:34,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 16:56:34,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527658342] [2019-11-28 16:56:34,892 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 16:56:34,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:56:34,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 16:56:34,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 16:56:34,912 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2019-11-28 16:56:34,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:56:34,934 INFO L93 Difference]: Finished difference Result 44 states and 61 transitions. [2019-11-28 16:56:34,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 16:56:34,936 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-28 16:56:34,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:56:34,947 INFO L225 Difference]: With dead ends: 44 [2019-11-28 16:56:34,948 INFO L226 Difference]: Without dead ends: 19 [2019-11-28 16:56:34,952 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 16:56:34,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-28 16:56:34,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-28 16:56:34,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-28 16:56:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2019-11-28 16:56:34,997 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2019-11-28 16:56:34,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:56:34,998 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2019-11-28 16:56:34,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 16:56:34,998 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2019-11-28 16:56:34,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-28 16:56:34,999 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:56:35,000 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:56:35,000 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:56:35,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:56:35,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1732890257, now seen corresponding path program 1 times [2019-11-28 16:56:35,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:56:35,002 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246399681] [2019-11-28 16:56:35,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:56:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:56:35,128 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 16:56:35,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246399681] [2019-11-28 16:56:35,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:56:35,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 16:56:35,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709453563] [2019-11-28 16:56:35,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 16:56:35,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:56:35,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 16:56:35,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 16:56:35,137 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2019-11-28 16:56:35,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:56:35,286 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2019-11-28 16:56:35,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 16:56:35,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-28 16:56:35,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:56:35,289 INFO L225 Difference]: With dead ends: 44 [2019-11-28 16:56:35,289 INFO L226 Difference]: Without dead ends: 33 [2019-11-28 16:56:35,290 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-28 16:56:35,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-28 16:56:35,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 21. [2019-11-28 16:56:35,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-28 16:56:35,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-28 16:56:35,303 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2019-11-28 16:56:35,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:56:35,304 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-28 16:56:35,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 16:56:35,304 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-28 16:56:35,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-28 16:56:35,306 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:56:35,306 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:56:35,307 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:56:35,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:56:35,309 INFO L82 PathProgramCache]: Analyzing trace with hash 397665306, now seen corresponding path program 1 times [2019-11-28 16:56:35,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:56:35,310 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707593663] [2019-11-28 16:56:35,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:56:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 16:56:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 16:56:35,444 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 16:56:35,444 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 16:56:35,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 04:56:35 BoogieIcfgContainer [2019-11-28 16:56:35,497 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 16:56:35,497 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 16:56:35,497 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 16:56:35,497 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 16:56:35,499 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:56:34" (3/4) ... [2019-11-28 16:56:35,502 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 16:56:35,557 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 16:56:35,557 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 16:56:35,560 INFO L168 Benchmark]: Toolchain (without parser) took 2115.92 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -104.6 MB). Peak memory consumption was 40.6 MB. Max. memory is 11.5 GB. [2019-11-28 16:56:35,561 INFO L168 Benchmark]: CDTParser took 0.92 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:56:35,561 INFO L168 Benchmark]: CACSL2BoogieTranslator took 629.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -175.1 MB). Peak memory consumption was 16.3 MB. Max. memory is 11.5 GB. [2019-11-28 16:56:35,562 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.52 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 16:56:35,563 INFO L168 Benchmark]: Boogie Preprocessor took 62.69 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 16:56:35,563 INFO L168 Benchmark]: RCFGBuilder took 452.76 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: 24.2 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. [2019-11-28 16:56:35,564 INFO L168 Benchmark]: TraceAbstraction took 848.87 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: 39.6 MB). Peak memory consumption was 39.6 MB. Max. memory is 11.5 GB. [2019-11-28 16:56:35,564 INFO L168 Benchmark]: Witness Printer took 60.18 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 16:56:35,568 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.92 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 629.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -175.1 MB). Peak memory consumption was 16.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 56.52 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 62.69 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 452.76 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: 24.2 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 848.87 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: 39.6 MB). Peak memory consumption was 39.6 MB. Max. memory is 11.5 GB. * Witness Printer took 60.18 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: 562]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] int flag = 1; [L522] List a = (List) malloc(sizeof(struct node)); [L523] COND FALSE !(a == 0) [L524] List t; [L525] List p = a; [L526] COND TRUE __VERIFIER_nondet_int() [L527] COND TRUE \read(flag) [L528] p->h = 2 [L529] flag = 0 [L534] t = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(t == 0) [L536] p->n = t [L537] EXPR p->n [L537] p = p->n [L526] COND FALSE !(__VERIFIER_nondet_int()) [L539] p->h = 3 [L540] p = a [L541] flag = 1 [L542] EXPR p->h [L542] COND TRUE p->h != 3 [L543] COND TRUE \read(flag) [L544] flag = 0 [L545] EXPR p->h [L545] COND TRUE p->h != 1 [L562] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.7s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 50 SDtfs, 16 SDslu, 38 SDs, 0 SdLazy, 37 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=0, 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, 2 MinimizatonAttempts, 12 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 507 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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...