./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-properties/alternating_list-2.i --full-output -ea --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8bd4bc60 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -ea -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 0.1.25-8bd4bc6 [2020-07-28 17:56:45,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-28 17:56:45,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-28 17:56:45,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-28 17:56:45,249 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-28 17:56:45,251 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-28 17:56:45,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-28 17:56:45,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-28 17:56:45,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-28 17:56:45,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-28 17:56:45,259 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-28 17:56:45,261 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-28 17:56:45,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-28 17:56:45,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-28 17:56:45,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-28 17:56:45,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-28 17:56:45,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-28 17:56:45,267 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-28 17:56:45,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-28 17:56:45,271 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-28 17:56:45,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-28 17:56:45,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-28 17:56:45,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-28 17:56:45,276 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-28 17:56:45,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-28 17:56:45,280 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-28 17:56:45,280 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-28 17:56:45,281 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-28 17:56:45,282 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-28 17:56:45,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-28 17:56:45,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-28 17:56:45,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-28 17:56:45,285 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-28 17:56:45,286 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-28 17:56:45,287 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-28 17:56:45,288 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-28 17:56:45,288 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-28 17:56:45,289 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-28 17:56:45,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-28 17:56:45,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-28 17:56:45,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-28 17:56:45,292 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-28 17:56:45,311 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-28 17:56:45,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-28 17:56:45,312 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-28 17:56:45,313 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-28 17:56:45,313 INFO L138 SettingsManager]: * Use SBE=true [2020-07-28 17:56:45,313 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-28 17:56:45,314 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-28 17:56:45,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-28 17:56:45,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-28 17:56:45,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-28 17:56:45,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-28 17:56:45,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-28 17:56:45,315 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-28 17:56:45,316 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-28 17:56:45,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-28 17:56:45,316 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-28 17:56:45,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-28 17:56:45,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-28 17:56:45,317 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-28 17:56:45,317 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-28 17:56:45,318 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-28 17:56:45,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-28 17:56:45,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-28 17:56:45,318 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-28 17:56:45,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-28 17:56:45,319 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-28 17:56:45,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-28 17:56:45,320 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-28 17:56:45,320 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-28 17:56:45,320 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 [2020-07-28 17:56:45,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-28 17:56:45,698 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-28 17:56:45,701 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-28 17:56:45,703 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-28 17:56:45,704 INFO L275 PluginConnector]: CDTParser initialized [2020-07-28 17:56:45,704 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/alternating_list-2.i [2020-07-28 17:56:45,768 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/758988260/b154a1668f424ca3a40e10c0ffc4ac30/FLAG2967b5f4f [2020-07-28 17:56:46,316 INFO L306 CDTParser]: Found 1 translation units. [2020-07-28 17:56:46,317 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/alternating_list-2.i [2020-07-28 17:56:46,331 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/758988260/b154a1668f424ca3a40e10c0ffc4ac30/FLAG2967b5f4f [2020-07-28 17:56:46,538 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/758988260/b154a1668f424ca3a40e10c0ffc4ac30 [2020-07-28 17:56:46,543 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-28 17:56:46,546 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-07-28 17:56:46,548 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-28 17:56:46,548 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-28 17:56:46,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-28 17:56:46,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.07 05:56:46" (1/1) ... [2020-07-28 17:56:46,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52f783e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:56:46, skipping insertion in model container [2020-07-28 17:56:46,557 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.07 05:56:46" (1/1) ... [2020-07-28 17:56:46,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-28 17:56:46,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-28 17:56:47,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-28 17:56:47,019 INFO L203 MainTranslator]: Completed pre-run [2020-07-28 17:56:47,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-28 17:56:47,212 INFO L208 MainTranslator]: Completed translation [2020-07-28 17:56:47,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:56:47 WrapperNode [2020-07-28 17:56:47,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-28 17:56:47,214 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-07-28 17:56:47,215 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-07-28 17:56:47,215 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-07-28 17:56:47,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:56:47" (1/1) ... [2020-07-28 17:56:47,242 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:56:47" (1/1) ... [2020-07-28 17:56:47,273 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-07-28 17:56:47,274 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-28 17:56:47,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-28 17:56:47,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-28 17:56:47,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:56:47" (1/1) ... [2020-07-28 17:56:47,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:56:47" (1/1) ... [2020-07-28 17:56:47,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:56:47" (1/1) ... [2020-07-28 17:56:47,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:56:47" (1/1) ... [2020-07-28 17:56:47,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:56:47" (1/1) ... [2020-07-28 17:56:47,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:56:47" (1/1) ... [2020-07-28 17:56:47,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:56:47" (1/1) ... [2020-07-28 17:56:47,316 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-28 17:56:47,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-28 17:56:47,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-28 17:56:47,320 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-28 17:56:47,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:56:47" (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 [2020-07-28 17:56:47,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-28 17:56:47,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-28 17:56:47,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-28 17:56:47,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-28 17:56:47,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-28 17:56:47,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-28 17:56:47,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-28 17:56:47,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-28 17:56:47,842 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-28 17:56:47,843 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-07-28 17:56:47,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 05:56:47 BoogieIcfgContainer [2020-07-28 17:56:47,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-28 17:56:47,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-28 17:56:47,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-28 17:56:47,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-28 17:56:47,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.07 05:56:46" (1/3) ... [2020-07-28 17:56:47,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@364abe7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.07 05:56:47, skipping insertion in model container [2020-07-28 17:56:47,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:56:47" (2/3) ... [2020-07-28 17:56:47,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@364abe7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.07 05:56:47, skipping insertion in model container [2020-07-28 17:56:47,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 05:56:47" (3/3) ... [2020-07-28 17:56:47,857 INFO L109 eAbstractionObserver]: Analyzing ICFG alternating_list-2.i [2020-07-28 17:56:47,867 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-28 17:56:47,875 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-28 17:56:47,886 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-28 17:56:47,907 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-28 17:56:47,907 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-28 17:56:47,907 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-28 17:56:47,907 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-28 17:56:47,908 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-28 17:56:47,908 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-28 17:56:47,908 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-28 17:56:47,908 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-28 17:56:47,924 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-07-28 17:56:47,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-28 17:56:47,931 INFO L414 BasicCegarLoop]: Found error trace [2020-07-28 17:56:47,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-28 17:56:47,932 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-28 17:56:47,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-28 17:56:47,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1953862777, now seen corresponding path program 1 times [2020-07-28 17:56:47,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-28 17:56:47,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621424162] [2020-07-28 17:56:47,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-28 17:56:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-28 17:56:48,105 INFO L280 TraceCheckUtils]: 0: Hoare triple {31#true} #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; {31#true} is VALID [2020-07-28 17:56:48,106 INFO L280 TraceCheckUtils]: 1: Hoare triple {31#true} havoc main_#res;havoc main_#t~malloc2.base, main_#t~malloc2.offset, main_#t~malloc4.base, main_#t~malloc4.offset, main_#t~mem5.base, main_#t~mem5.offset, main_#t~nondet3, main_#t~mem7, main_#t~mem8, main_#t~mem9.base, main_#t~mem9.offset, main_#t~mem6, main_#t~mem11.base, main_#t~mem11.offset, main_~tmp~0.base, main_~tmp~0.offset, main_#t~mem10, main_~flag~0, main_~a~0.base, main_~a~0.offset, main_~t~0.base, main_~t~0.offset, main_~p~0.base, main_~p~0.offset;main_~flag~0 := 1;call main_#t~malloc2.base, main_#t~malloc2.offset := #Ultimate.allocOnHeap(8);main_~a~0.base, main_~a~0.offset := main_#t~malloc2.base, main_#t~malloc2.offset; {31#true} is VALID [2020-07-28 17:56:48,106 INFO L280 TraceCheckUtils]: 2: Hoare triple {31#true} assume !(main_~a~0.base == 0 && main_~a~0.offset == 0); {31#true} is VALID [2020-07-28 17:56:48,107 INFO L280 TraceCheckUtils]: 3: Hoare triple {31#true} havoc main_~t~0.base, main_~t~0.offset;main_~p~0.base, main_~p~0.offset := main_~a~0.base, main_~a~0.offset; {31#true} is VALID [2020-07-28 17:56:48,108 INFO L280 TraceCheckUtils]: 4: Hoare triple {31#true} assume !true; {32#false} is VALID [2020-07-28 17:56:48,108 INFO L280 TraceCheckUtils]: 5: Hoare triple {32#false} call write~int(3, main_~p~0.base, main_~p~0.offset, 4);main_~p~0.base, main_~p~0.offset := main_~a~0.base, main_~a~0.offset;main_~flag~0 := 1; {32#false} is VALID [2020-07-28 17:56:48,109 INFO L280 TraceCheckUtils]: 6: Hoare triple {32#false} call main_#t~mem6 := read~int(main_~p~0.base, main_~p~0.offset, 4); {32#false} is VALID [2020-07-28 17:56:48,109 INFO L280 TraceCheckUtils]: 7: Hoare triple {32#false} assume !!(3 != main_#t~mem6);havoc main_#t~mem6; {32#false} is VALID [2020-07-28 17:56:48,109 INFO L280 TraceCheckUtils]: 8: Hoare triple {32#false} assume 0 != main_~flag~0;main_~flag~0 := 0;call main_#t~mem7 := read~int(main_~p~0.base, main_~p~0.offset, 4); {32#false} is VALID [2020-07-28 17:56:48,110 INFO L280 TraceCheckUtils]: 9: Hoare triple {32#false} assume 1 != main_#t~mem7;havoc main_#t~mem7; {32#false} is VALID [2020-07-28 17:56:48,110 INFO L280 TraceCheckUtils]: 10: Hoare triple {32#false} assume !false; {32#false} is VALID [2020-07-28 17:56:48,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-28 17:56:48,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621424162] [2020-07-28 17:56:48,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-28 17:56:48,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-28 17:56:48,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273297950] [2020-07-28 17:56:48,123 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-28 17:56:48,124 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-28 17:56:48,129 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states. [2020-07-28 17:56:48,152 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 11 edges. 11 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-28 17:56:48,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-28 17:56:48,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-28 17:56:48,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-28 17:56:48,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-28 17:56:48,165 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-07-28 17:56:48,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 17:56:48,241 INFO L93 Difference]: Finished difference Result 44 states and 61 transitions. [2020-07-28 17:56:48,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-28 17:56:48,242 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-28 17:56:48,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-28 17:56:48,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-07-28 17:56:48,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 61 transitions. [2020-07-28 17:56:48,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-07-28 17:56:48,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 61 transitions. [2020-07-28 17:56:48,260 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states and 61 transitions. [2020-07-28 17:56:48,375 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 61 edges. 61 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-28 17:56:48,387 INFO L225 Difference]: With dead ends: 44 [2020-07-28 17:56:48,388 INFO L226 Difference]: Without dead ends: 19 [2020-07-28 17:56:48,392 INFO L675 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 [2020-07-28 17:56:48,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-28 17:56:48,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-28 17:56:48,429 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-28 17:56:48,429 INFO L82 GeneralOperation]: Start isEquivalent. First operand 19 states. Second operand 19 states. [2020-07-28 17:56:48,430 INFO L74 IsIncluded]: Start isIncluded. First operand 19 states. Second operand 19 states. [2020-07-28 17:56:48,430 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 19 states. [2020-07-28 17:56:48,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 17:56:48,434 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2020-07-28 17:56:48,434 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-07-28 17:56:48,435 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 17:56:48,435 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-28 17:56:48,435 INFO L74 IsIncluded]: Start isIncluded. First operand 19 states. Second operand 19 states. [2020-07-28 17:56:48,436 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 19 states. [2020-07-28 17:56:48,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 17:56:48,439 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2020-07-28 17:56:48,439 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-07-28 17:56:48,440 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 17:56:48,440 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-28 17:56:48,440 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-28 17:56:48,441 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-28 17:56:48,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-28 17:56:48,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-07-28 17:56:48,445 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2020-07-28 17:56:48,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-28 17:56:48,446 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-07-28 17:56:48,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-28 17:56:48,447 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-07-28 17:56:48,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-28 17:56:48,447 INFO L414 BasicCegarLoop]: Found error trace [2020-07-28 17:56:48,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-28 17:56:48,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-28 17:56:48,449 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-28 17:56:48,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-28 17:56:48,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1732890257, now seen corresponding path program 1 times [2020-07-28 17:56:48,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-28 17:56:48,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92896630] [2020-07-28 17:56:48,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-28 17:56:48,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-28 17:56:48,614 INFO L280 TraceCheckUtils]: 0: Hoare triple {150#true} #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; {150#true} is VALID [2020-07-28 17:56:48,615 INFO L280 TraceCheckUtils]: 1: Hoare triple {150#true} havoc main_#res;havoc main_#t~malloc2.base, main_#t~malloc2.offset, main_#t~malloc4.base, main_#t~malloc4.offset, main_#t~mem5.base, main_#t~mem5.offset, main_#t~nondet3, main_#t~mem7, main_#t~mem8, main_#t~mem9.base, main_#t~mem9.offset, main_#t~mem6, main_#t~mem11.base, main_#t~mem11.offset, main_~tmp~0.base, main_~tmp~0.offset, main_#t~mem10, main_~flag~0, main_~a~0.base, main_~a~0.offset, main_~t~0.base, main_~t~0.offset, main_~p~0.base, main_~p~0.offset;main_~flag~0 := 1;call main_#t~malloc2.base, main_#t~malloc2.offset := #Ultimate.allocOnHeap(8);main_~a~0.base, main_~a~0.offset := main_#t~malloc2.base, main_#t~malloc2.offset; {150#true} is VALID [2020-07-28 17:56:48,615 INFO L280 TraceCheckUtils]: 2: Hoare triple {150#true} assume !(main_~a~0.base == 0 && main_~a~0.offset == 0); {150#true} is VALID [2020-07-28 17:56:48,617 INFO L280 TraceCheckUtils]: 3: Hoare triple {150#true} havoc main_~t~0.base, main_~t~0.offset;main_~p~0.base, main_~p~0.offset := main_~a~0.base, main_~a~0.offset; {152#(and (= ULTIMATE.start_main_~a~0.offset ULTIMATE.start_main_~p~0.offset) (= ULTIMATE.start_main_~a~0.base ULTIMATE.start_main_~p~0.base))} is VALID [2020-07-28 17:56:48,619 INFO L280 TraceCheckUtils]: 4: Hoare triple {152#(and (= ULTIMATE.start_main_~a~0.offset ULTIMATE.start_main_~p~0.offset) (= ULTIMATE.start_main_~a~0.base ULTIMATE.start_main_~p~0.base))} assume -2147483648 <= main_#t~nondet3 && main_#t~nondet3 <= 2147483647; {152#(and (= ULTIMATE.start_main_~a~0.offset ULTIMATE.start_main_~p~0.offset) (= ULTIMATE.start_main_~a~0.base ULTIMATE.start_main_~p~0.base))} is VALID [2020-07-28 17:56:48,622 INFO L280 TraceCheckUtils]: 5: Hoare triple {152#(and (= ULTIMATE.start_main_~a~0.offset ULTIMATE.start_main_~p~0.offset) (= ULTIMATE.start_main_~a~0.base ULTIMATE.start_main_~p~0.base))} assume !(0 != main_#t~nondet3);havoc main_#t~nondet3; {152#(and (= ULTIMATE.start_main_~a~0.offset ULTIMATE.start_main_~p~0.offset) (= ULTIMATE.start_main_~a~0.base ULTIMATE.start_main_~p~0.base))} is VALID [2020-07-28 17:56:48,625 INFO L280 TraceCheckUtils]: 6: Hoare triple {152#(and (= ULTIMATE.start_main_~a~0.offset ULTIMATE.start_main_~p~0.offset) (= ULTIMATE.start_main_~a~0.base ULTIMATE.start_main_~p~0.base))} call write~int(3, main_~p~0.base, main_~p~0.offset, 4);main_~p~0.base, main_~p~0.offset := main_~a~0.base, main_~a~0.offset;main_~flag~0 := 1; {153#(= (select (select |#memory_int| ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset) 3)} is VALID [2020-07-28 17:56:48,626 INFO L280 TraceCheckUtils]: 7: Hoare triple {153#(= (select (select |#memory_int| ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset) 3)} call main_#t~mem6 := read~int(main_~p~0.base, main_~p~0.offset, 4); {154#(= 3 |ULTIMATE.start_main_#t~mem6|)} is VALID [2020-07-28 17:56:48,627 INFO L280 TraceCheckUtils]: 8: Hoare triple {154#(= 3 |ULTIMATE.start_main_#t~mem6|)} assume !!(3 != main_#t~mem6);havoc main_#t~mem6; {151#false} is VALID [2020-07-28 17:56:48,628 INFO L280 TraceCheckUtils]: 9: Hoare triple {151#false} assume 0 != main_~flag~0;main_~flag~0 := 0;call main_#t~mem7 := read~int(main_~p~0.base, main_~p~0.offset, 4); {151#false} is VALID [2020-07-28 17:56:48,628 INFO L280 TraceCheckUtils]: 10: Hoare triple {151#false} assume 1 != main_#t~mem7;havoc main_#t~mem7; {151#false} is VALID [2020-07-28 17:56:48,629 INFO L280 TraceCheckUtils]: 11: Hoare triple {151#false} assume !false; {151#false} is VALID [2020-07-28 17:56:48,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-28 17:56:48,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92896630] [2020-07-28 17:56:48,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-28 17:56:48,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-28 17:56:48,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981178378] [2020-07-28 17:56:48,638 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-28 17:56:48,639 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-28 17:56:48,639 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states. [2020-07-28 17:56:48,667 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 12 edges. 12 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-28 17:56:48,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-28 17:56:48,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-28 17:56:48,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-28 17:56:48,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-28 17:56:48,669 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2020-07-28 17:56:48,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 17:56:48,968 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2020-07-28 17:56:48,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-28 17:56:48,970 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-28 17:56:48,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-28 17:56:48,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-28 17:56:48,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 54 transitions. [2020-07-28 17:56:48,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-28 17:56:48,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 54 transitions. [2020-07-28 17:56:48,981 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states and 54 transitions. [2020-07-28 17:56:49,062 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 54 edges. 54 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-28 17:56:49,064 INFO L225 Difference]: With dead ends: 44 [2020-07-28 17:56:49,064 INFO L226 Difference]: Without dead ends: 33 [2020-07-28 17:56:49,067 INFO L675 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 [2020-07-28 17:56:49,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-28 17:56:49,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 21. [2020-07-28 17:56:49,078 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-28 17:56:49,078 INFO L82 GeneralOperation]: Start isEquivalent. First operand 33 states. Second operand 21 states. [2020-07-28 17:56:49,078 INFO L74 IsIncluded]: Start isIncluded. First operand 33 states. Second operand 21 states. [2020-07-28 17:56:49,078 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 21 states. [2020-07-28 17:56:49,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 17:56:49,082 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-07-28 17:56:49,082 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-07-28 17:56:49,083 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 17:56:49,084 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-28 17:56:49,084 INFO L74 IsIncluded]: Start isIncluded. First operand 21 states. Second operand 33 states. [2020-07-28 17:56:49,084 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 33 states. [2020-07-28 17:56:49,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 17:56:49,090 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-07-28 17:56:49,090 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-07-28 17:56:49,091 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 17:56:49,091 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-28 17:56:49,091 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-28 17:56:49,091 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-28 17:56:49,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-28 17:56:49,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-28 17:56:49,096 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2020-07-28 17:56:49,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-28 17:56:49,097 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-28 17:56:49,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-28 17:56:49,097 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-28 17:56:49,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-28 17:56:49,098 INFO L414 BasicCegarLoop]: Found error trace [2020-07-28 17:56:49,099 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-28 17:56:49,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-28 17:56:49,099 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-28 17:56:49,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-28 17:56:49,100 INFO L82 PathProgramCache]: Analyzing trace with hash 397665306, now seen corresponding path program 1 times [2020-07-28 17:56:49,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-28 17:56:49,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807374606] [2020-07-28 17:56:49,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-28 17:56:49,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-28 17:56:49,155 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-28 17:56:49,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-28 17:56:49,212 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-28 17:56:49,245 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-28 17:56:49,246 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-28 17:56:49,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-28 17:56:49,319 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-28 17:56:49,320 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-28 17:56:49,320 WARN L170 areAnnotationChecker]: L523 has no Hoare annotation [2020-07-28 17:56:49,320 WARN L170 areAnnotationChecker]: L523 has no Hoare annotation [2020-07-28 17:56:49,320 WARN L170 areAnnotationChecker]: L518 has no Hoare annotation [2020-07-28 17:56:49,321 WARN L170 areAnnotationChecker]: L523-1 has no Hoare annotation [2020-07-28 17:56:49,321 WARN L170 areAnnotationChecker]: L526-3 has no Hoare annotation [2020-07-28 17:56:49,321 WARN L170 areAnnotationChecker]: L526-3 has no Hoare annotation [2020-07-28 17:56:49,321 WARN L170 areAnnotationChecker]: L526-4 has no Hoare annotation [2020-07-28 17:56:49,322 WARN L170 areAnnotationChecker]: L526-1 has no Hoare annotation [2020-07-28 17:56:49,322 WARN L170 areAnnotationChecker]: L526-1 has no Hoare annotation [2020-07-28 17:56:49,322 WARN L170 areAnnotationChecker]: L542-3 has no Hoare annotation [2020-07-28 17:56:49,322 WARN L170 areAnnotationChecker]: L542-3 has no Hoare annotation [2020-07-28 17:56:49,322 WARN L170 areAnnotationChecker]: L527 has no Hoare annotation [2020-07-28 17:56:49,323 WARN L170 areAnnotationChecker]: L527 has no Hoare annotation [2020-07-28 17:56:49,323 WARN L170 areAnnotationChecker]: L542-4 has no Hoare annotation [2020-07-28 17:56:49,323 WARN L170 areAnnotationChecker]: L542-1 has no Hoare annotation [2020-07-28 17:56:49,323 WARN L170 areAnnotationChecker]: L542-1 has no Hoare annotation [2020-07-28 17:56:49,324 WARN L170 areAnnotationChecker]: L527-2 has no Hoare annotation [2020-07-28 17:56:49,324 WARN L170 areAnnotationChecker]: L555-3 has no Hoare annotation [2020-07-28 17:56:49,324 WARN L170 areAnnotationChecker]: L555-3 has no Hoare annotation [2020-07-28 17:56:49,324 WARN L170 areAnnotationChecker]: L543 has no Hoare annotation [2020-07-28 17:56:49,324 WARN L170 areAnnotationChecker]: L543 has no Hoare annotation [2020-07-28 17:56:49,325 WARN L170 areAnnotationChecker]: L535 has no Hoare annotation [2020-07-28 17:56:49,325 WARN L170 areAnnotationChecker]: L535 has no Hoare annotation [2020-07-28 17:56:49,325 WARN L170 areAnnotationChecker]: L555-4 has no Hoare annotation [2020-07-28 17:56:49,325 WARN L170 areAnnotationChecker]: L555-1 has no Hoare annotation [2020-07-28 17:56:49,326 WARN L170 areAnnotationChecker]: L555-1 has no Hoare annotation [2020-07-28 17:56:49,326 WARN L170 areAnnotationChecker]: L545 has no Hoare annotation [2020-07-28 17:56:49,326 WARN L170 areAnnotationChecker]: L545 has no Hoare annotation [2020-07-28 17:56:49,326 WARN L170 areAnnotationChecker]: L549 has no Hoare annotation [2020-07-28 17:56:49,326 WARN L170 areAnnotationChecker]: L549 has no Hoare annotation [2020-07-28 17:56:49,327 WARN L170 areAnnotationChecker]: L518-1 has no Hoare annotation [2020-07-28 17:56:49,327 WARN L170 areAnnotationChecker]: L535-1 has no Hoare annotation [2020-07-28 17:56:49,327 WARN L170 areAnnotationChecker]: L563 has no Hoare annotation [2020-07-28 17:56:49,327 WARN L170 areAnnotationChecker]: L550 has no Hoare annotation [2020-07-28 17:56:49,328 WARN L170 areAnnotationChecker]: L550 has no Hoare annotation [2020-07-28 17:56:49,328 WARN L170 areAnnotationChecker]: L543-2 has no Hoare annotation [2020-07-28 17:56:49,328 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-28 17:56:49,328 INFO L163 areAnnotationChecker]: CFG has 0 edges. 0 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2020-07-28 17:56:49,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.07 05:56:49 BoogieIcfgContainer [2020-07-28 17:56:49,333 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-28 17:56:49,333 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-07-28 17:56:49,334 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-07-28 17:56:49,334 INFO L275 PluginConnector]: Witness Printer initialized [2020-07-28 17:56:49,335 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 05:56:47" (3/4) ... [2020-07-28 17:56:49,338 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-07-28 17:56:49,420 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-07-28 17:56:49,420 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-07-28 17:56:49,424 INFO L168 Benchmark]: Toolchain (without parser) took 2878.85 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 176.2 MB). Free memory was 954.9 MB in the beginning and 1.0 GB in the end (delta: -61.4 MB). Peak memory consumption was 114.8 MB. Max. memory is 11.5 GB. [2020-07-28 17:56:49,425 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 1.0 GB. Free memory is still 987.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-07-28 17:56:49,426 INFO L168 Benchmark]: CACSL2BoogieTranslator took 666.43 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 176.2 MB). Free memory was 954.9 MB in the beginning and 1.2 GB in the end (delta: -207.4 MB). Peak memory consumption was 26.4 MB. Max. memory is 11.5 GB. [2020-07-28 17:56:49,426 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.30 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 11.5 GB. [2020-07-28 17:56:49,427 INFO L168 Benchmark]: Boogie Preprocessor took 42.77 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-07-28 17:56:49,428 INFO L168 Benchmark]: RCFGBuilder took 528.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 36.9 MB). Peak memory consumption was 36.9 MB. Max. memory is 11.5 GB. [2020-07-28 17:56:49,428 INFO L168 Benchmark]: TraceAbstraction took 1484.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 106.7 MB). Peak memory consumption was 106.7 MB. Max. memory is 11.5 GB. [2020-07-28 17:56:49,429 INFO L168 Benchmark]: Witness Printer took 87.18 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-07-28 17:56:49,433 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 1.0 GB. Free memory is still 987.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 666.43 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 176.2 MB). Free memory was 954.9 MB in the beginning and 1.2 GB in the end (delta: -207.4 MB). Peak memory consumption was 26.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 59.30 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 42.77 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 528.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 36.9 MB). Peak memory consumption was 36.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1484.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 106.7 MB). Peak memory consumption was 106.7 MB. Max. memory is 11.5 GB. * Witness Printer took 87.18 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 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. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 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, 0.2s 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, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...