./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b5699aa Using bit-precise analysis Retrying with bit-precise analysis 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f1dcdcb191cc3a70c9cb7bce226f0263f581cc07 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-21 21:57:42,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-21 21:57:42,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-21 21:57:42,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-21 21:57:42,918 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-21 21:57:42,919 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-21 21:57:42,921 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-21 21:57:42,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-21 21:57:42,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-21 21:57:42,925 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-21 21:57:42,926 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-21 21:57:42,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-21 21:57:42,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-21 21:57:42,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-21 21:57:42,930 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-21 21:57:42,931 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-21 21:57:42,932 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-21 21:57:42,933 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-21 21:57:42,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-21 21:57:42,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-21 21:57:42,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-21 21:57:42,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-21 21:57:42,940 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-21 21:57:42,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-21 21:57:42,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-21 21:57:42,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-21 21:57:42,944 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-21 21:57:42,945 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-21 21:57:42,945 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-21 21:57:42,946 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-21 21:57:42,947 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-21 21:57:42,947 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-21 21:57:42,948 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-21 21:57:42,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-21 21:57:42,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-21 21:57:42,950 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-21 21:57:42,951 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-21 21:57:42,951 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-21 21:57:42,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-21 21:57:42,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-21 21:57:42,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-21 21:57:42,958 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-21 21:57:42,973 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-21 21:57:42,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-21 21:57:42,975 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-21 21:57:42,975 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-21 21:57:42,975 INFO L138 SettingsManager]: * Use SBE=true [2019-11-21 21:57:42,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-21 21:57:42,976 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-21 21:57:42,976 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-21 21:57:42,976 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-21 21:57:42,977 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-21 21:57:42,977 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-21 21:57:42,977 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-21 21:57:42,977 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-21 21:57:42,978 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-21 21:57:42,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-21 21:57:42,978 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-21 21:57:42,979 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-21 21:57:42,979 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-21 21:57:42,979 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-21 21:57:42,979 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-21 21:57:42,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-21 21:57:42,980 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-21 21:57:42,980 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-21 21:57:42,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-21 21:57:42,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-21 21:57:42,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-21 21:57:42,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-21 21:57:42,982 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-21 21:57:42,982 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-21 21:57:42,982 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-21 21:57:42,982 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> f1dcdcb191cc3a70c9cb7bce226f0263f581cc07 [2019-11-21 21:57:43,271 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-21 21:57:43,285 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-21 21:57:43,289 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-21 21:57:43,290 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-21 21:57:43,291 INFO L275 PluginConnector]: CDTParser initialized [2019-11-21 21:57:43,292 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2019-11-21 21:57:43,352 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46f411c48/59268df1e7b3417589df11afd9f3fdd3/FLAGc3670c361 [2019-11-21 21:57:43,817 INFO L306 CDTParser]: Found 1 translation units. [2019-11-21 21:57:43,820 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2019-11-21 21:57:43,827 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46f411c48/59268df1e7b3417589df11afd9f3fdd3/FLAGc3670c361 [2019-11-21 21:57:44,191 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46f411c48/59268df1e7b3417589df11afd9f3fdd3 [2019-11-21 21:57:44,194 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-21 21:57:44,196 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-21 21:57:44,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-21 21:57:44,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-21 21:57:44,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-21 21:57:44,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:57:44" (1/1) ... [2019-11-21 21:57:44,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54727c3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:57:44, skipping insertion in model container [2019-11-21 21:57:44,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:57:44" (1/1) ... [2019-11-21 21:57:44,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-21 21:57:44,239 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-21 21:57:44,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-21 21:57:44,442 INFO L201 MainTranslator]: Completed pre-run [2019-11-21 21:57:44,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-21 21:57:44,544 INFO L205 MainTranslator]: Completed translation [2019-11-21 21:57:44,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:57:44 WrapperNode [2019-11-21 21:57:44,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-21 21:57:44,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-21 21:57:44,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-21 21:57:44,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-21 21:57:44,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:57:44" (1/1) ... [2019-11-21 21:57:44,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:57:44" (1/1) ... [2019-11-21 21:57:44,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:57:44" (1/1) ... [2019-11-21 21:57:44,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:57:44" (1/1) ... [2019-11-21 21:57:44,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:57:44" (1/1) ... [2019-11-21 21:57:44,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:57:44" (1/1) ... [2019-11-21 21:57:44,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:57:44" (1/1) ... [2019-11-21 21:57:44,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-21 21:57:44,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-21 21:57:44,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-21 21:57:44,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-21 21:57:44,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:57:44" (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 [2019-11-21 21:57:44,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-21 21:57:44,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-21 21:57:44,663 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-21 21:57:44,663 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2019-11-21 21:57:44,663 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-21 21:57:44,663 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2019-11-21 21:57:44,663 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-21 21:57:44,663 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-21 21:57:44,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-21 21:57:44,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-21 21:57:44,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-21 21:57:44,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-21 21:57:44,665 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-11-21 21:57:44,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-21 21:57:44,665 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-21 21:57:44,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-21 21:57:44,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2019-11-21 21:57:44,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-21 21:57:44,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-21 21:57:44,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-21 21:57:44,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-21 21:57:45,179 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-21 21:57:45,179 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-21 21:57:45,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:57:45 BoogieIcfgContainer [2019-11-21 21:57:45,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-21 21:57:45,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-21 21:57:45,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-21 21:57:45,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-21 21:57:45,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:57:44" (1/3) ... [2019-11-21 21:57:45,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cc4eab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:57:45, skipping insertion in model container [2019-11-21 21:57:45,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:57:44" (2/3) ... [2019-11-21 21:57:45,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cc4eab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:57:45, skipping insertion in model container [2019-11-21 21:57:45,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:57:45" (3/3) ... [2019-11-21 21:57:45,189 INFO L109 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2019-11-21 21:57:45,204 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-21 21:57:45,212 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 16 error locations. [2019-11-21 21:57:45,224 INFO L249 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2019-11-21 21:57:45,244 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-21 21:57:45,245 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-21 21:57:45,245 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-21 21:57:45,245 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-21 21:57:45,245 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-21 21:57:45,245 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-21 21:57:45,245 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-21 21:57:45,245 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-21 21:57:45,261 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2019-11-21 21:57:45,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-21 21:57:45,272 INFO L402 BasicCegarLoop]: Found error trace [2019-11-21 21:57:45,273 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-21 21:57:45,274 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2019-11-21 21:57:45,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-21 21:57:45,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1731957205, now seen corresponding path program 1 times [2019-11-21 21:57:45,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-21 21:57:45,293 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [936687790] [2019-11-21 21:57:45,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 21:57:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-21 21:57:45,429 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-21 21:57:45,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-21 21:57:45,492 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-21 21:57:45,493 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-21 21:57:45,501 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-21 21:57:45,502 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-21 21:57:45,502 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-21 21:57:45,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 21:57:45,585 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-21 21:57:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 21:57:45,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [936687790] [2019-11-21 21:57:45,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-21 21:57:45,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 4 [2019-11-21 21:57:45,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555074526] [2019-11-21 21:57:45,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-21 21:57:45,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-21 21:57:45,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-21 21:57:45,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-21 21:57:45,663 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 5 states. [2019-11-21 21:57:45,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-21 21:57:45,936 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2019-11-21 21:57:45,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-21 21:57:45,938 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-11-21 21:57:45,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-21 21:57:45,949 INFO L225 Difference]: With dead ends: 59 [2019-11-21 21:57:45,950 INFO L226 Difference]: Without dead ends: 56 [2019-11-21 21:57:45,952 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-21 21:57:45,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-21 21:57:45,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-21 21:57:45,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-21 21:57:46,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2019-11-21 21:57:46,006 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 18 [2019-11-21 21:57:46,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-21 21:57:46,008 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2019-11-21 21:57:46,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-21 21:57:46,009 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2019-11-21 21:57:46,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-21 21:57:46,011 INFO L402 BasicCegarLoop]: Found error trace [2019-11-21 21:57:46,012 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-21 21:57:46,215 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 21:57:46,216 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2019-11-21 21:57:46,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-21 21:57:46,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1731957204, now seen corresponding path program 1 times [2019-11-21 21:57:46,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-21 21:57:46,219 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1863126554] [2019-11-21 21:57:46,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 21:57:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-21 21:57:46,340 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-21 21:57:46,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-21 21:57:46,356 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2019-11-21 21:57:46,356 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-21 21:57:46,373 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-21 21:57:46,374 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-21 21:57:46,375 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:20 [2019-11-21 21:57:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 21:57:46,831 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-21 21:57:47,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-21 21:57:47,981 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-21 21:57:48,319 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-21 21:57:48,326 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-21 21:57:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 21:57:48,352 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1863126554] [2019-11-21 21:57:48,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-21 21:57:48,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 12 [2019-11-21 21:57:48,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971400004] [2019-11-21 21:57:48,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-21 21:57:48,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-21 21:57:48,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-21 21:57:48,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-11-21 21:57:48,361 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 13 states. [2019-11-21 21:57:50,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-21 21:57:50,230 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2019-11-21 21:57:50,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-21 21:57:50,231 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-11-21 21:57:50,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-21 21:57:50,235 INFO L225 Difference]: With dead ends: 70 [2019-11-21 21:57:50,235 INFO L226 Difference]: Without dead ends: 70 [2019-11-21 21:57:50,236 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2019-11-21 21:57:50,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-21 21:57:50,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2019-11-21 21:57:50,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-21 21:57:50,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2019-11-21 21:57:50,248 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 18 [2019-11-21 21:57:50,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-21 21:57:50,248 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2019-11-21 21:57:50,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-21 21:57:50,249 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2019-11-21 21:57:50,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-21 21:57:50,250 INFO L402 BasicCegarLoop]: Found error trace [2019-11-21 21:57:50,250 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-21 21:57:50,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 21:57:50,465 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2019-11-21 21:57:50,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-21 21:57:50,465 INFO L82 PathProgramCache]: Analyzing trace with hash 2036436141, now seen corresponding path program 1 times [2019-11-21 21:57:50,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-21 21:57:50,467 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1315963941] [2019-11-21 21:57:50,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 21:57:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-21 21:57:50,570 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-21 21:57:50,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-21 21:57:50,594 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2019-11-21 21:57:50,595 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-21 21:57:50,612 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-21 21:57:50,614 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-21 21:57:50,614 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:20 [2019-11-21 21:57:51,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 21:57:51,037 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-21 21:57:51,870 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-21 21:57:51,870 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-21 21:57:56,763 WARN L192 SmtUtils]: Spent 4.60 s on a formula simplification that was a NOOP. DAG size: 43 [2019-11-21 21:58:02,711 WARN L192 SmtUtils]: Spent 1.60 s on a formula simplification that was a NOOP. DAG size: 85 [2019-11-21 21:58:12,510 WARN L192 SmtUtils]: Spent 7.31 s on a formula simplification that was a NOOP. DAG size: 85 [2019-11-21 21:58:12,932 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-21 21:58:12,933 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-21 21:58:12,933 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-21 21:58:12,933 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-21 21:58:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 21:58:12,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1315963941] [2019-11-21 21:58:12,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-21 21:58:12,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 17 [2019-11-21 21:58:12,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343992941] [2019-11-21 21:58:12,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-21 21:58:12,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-21 21:58:12,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-21 21:58:12,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=248, Unknown=3, NotChecked=0, Total=306 [2019-11-21 21:58:12,973 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 18 states. [2019-11-21 21:58:21,134 WARN L192 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2019-11-21 21:58:21,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-21 21:58:21,762 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2019-11-21 21:58:21,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-21 21:58:21,766 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 20 [2019-11-21 21:58:21,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-21 21:58:21,769 INFO L225 Difference]: With dead ends: 83 [2019-11-21 21:58:21,769 INFO L226 Difference]: Without dead ends: 83 [2019-11-21 21:58:21,770 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=124, Invalid=473, Unknown=3, NotChecked=0, Total=600 [2019-11-21 21:58:21,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-21 21:58:21,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2019-11-21 21:58:21,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-21 21:58:21,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2019-11-21 21:58:21,780 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 20 [2019-11-21 21:58:21,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-21 21:58:21,781 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2019-11-21 21:58:21,781 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-21 21:58:21,781 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2019-11-21 21:58:21,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-21 21:58:21,782 INFO L402 BasicCegarLoop]: Found error trace [2019-11-21 21:58:21,782 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-21 21:58:21,983 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 21:58:21,984 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2019-11-21 21:58:21,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-21 21:58:21,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1816818779, now seen corresponding path program 1 times [2019-11-21 21:58:21,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-21 21:58:21,986 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [709420510] [2019-11-21 21:58:21,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 21:58:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-21 21:58:22,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-21 21:58:22,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-21 21:58:22,121 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-21 21:58:22,122 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-21 21:58:22,124 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-21 21:58:22,124 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-21 21:58:22,124 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-21 21:58:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 21:58:22,200 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-21 21:58:22,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 21:58:22,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [709420510] [2019-11-21 21:58:22,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-21 21:58:22,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 6 [2019-11-21 21:58:22,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216819656] [2019-11-21 21:58:22,222 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-21 21:58:22,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-21 21:58:22,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-21 21:58:22,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-21 21:58:22,223 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 7 states. [2019-11-21 21:58:22,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-21 21:58:22,520 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2019-11-21 21:58:22,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-21 21:58:22,524 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-11-21 21:58:22,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-21 21:58:22,525 INFO L225 Difference]: With dead ends: 57 [2019-11-21 21:58:22,526 INFO L226 Difference]: Without dead ends: 57 [2019-11-21 21:58:22,526 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-21 21:58:22,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-21 21:58:22,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-11-21 21:58:22,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-21 21:58:22,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2019-11-21 21:58:22,534 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 21 [2019-11-21 21:58:22,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-21 21:58:22,535 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2019-11-21 21:58:22,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-21 21:58:22,535 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2019-11-21 21:58:22,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-21 21:58:22,536 INFO L402 BasicCegarLoop]: Found error trace [2019-11-21 21:58:22,536 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-21 21:58:22,738 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 21:58:22,739 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2019-11-21 21:58:22,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-21 21:58:22,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1816818778, now seen corresponding path program 1 times [2019-11-21 21:58:22,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-21 21:58:22,741 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [340267024] [2019-11-21 21:58:22,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 21:58:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-21 21:58:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-21 21:58:22,985 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-21 21:58:22,986 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-21 21:58:23,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 21:58:23,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 09:58:23 BoogieIcfgContainer [2019-11-21 21:58:23,215 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-21 21:58:23,216 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-21 21:58:23,216 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-21 21:58:23,217 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-21 21:58:23,217 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:57:45" (3/4) ... [2019-11-21 21:58:23,219 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-21 21:58:23,261 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-21 21:58:23,261 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-21 21:58:23,263 INFO L168 Benchmark]: Toolchain (without parser) took 39067.63 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 201.9 MB). Free memory was 957.7 MB in the beginning and 1.0 GB in the end (delta: -74.7 MB). Peak memory consumption was 127.1 MB. Max. memory is 11.5 GB. [2019-11-21 21:58:23,263 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-21 21:58:23,264 INFO L168 Benchmark]: CACSL2BoogieTranslator took 348.32 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.1 MB). Free memory was 957.7 MB in the beginning and 1.1 GB in the end (delta: -180.6 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. [2019-11-21 21:58:23,269 INFO L168 Benchmark]: Boogie Preprocessor took 62.56 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. [2019-11-21 21:58:23,270 INFO L168 Benchmark]: RCFGBuilder took 572.69 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: 30.9 MB). Peak memory consumption was 30.9 MB. Max. memory is 11.5 GB. [2019-11-21 21:58:23,271 INFO L168 Benchmark]: TraceAbstraction took 38033.65 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 59.8 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 60.9 MB). Peak memory consumption was 120.7 MB. Max. memory is 11.5 GB. [2019-11-21 21:58:23,272 INFO L168 Benchmark]: Witness Printer took 45.14 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 7.4 MB). Peak memory consumption was 7.4 MB. Max. memory is 11.5 GB. [2019-11-21 21:58:23,279 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 348.32 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.1 MB). Free memory was 957.7 MB in the beginning and 1.1 GB in the end (delta: -180.6 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 62.56 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. * RCFGBuilder took 572.69 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: 30.9 MB). Peak memory consumption was 30.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 38033.65 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 59.8 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 60.9 MB). Peak memory consumption was 120.7 MB. Max. memory is 11.5 GB. * Witness Printer took 45.14 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 7.4 MB). Peak memory consumption was 7.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 21]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L36] int n = __VERIFIER_nondet_int(); [L38] int i = __VERIFIER_nondet_int(); [L41] EXPR, FCALL calloc(n, sizeof(int)) VAL [calloc(n, sizeof(int))={1:0}, i=1073741822, n=1073741823] [L41] int *a = calloc(n, sizeof(int)); VAL [a={1:0}, calloc(n, sizeof(int))={1:0}, i=1073741822, n=1073741823] [L42] CALL check(0, n-1, a, i, n) VAL [\old(i)=1073741822, \old(n)=1073741823, \old(x)=0, \old(y)=1073741822, a={1:0}] [L12] COND FALSE !(x >= y) VAL [\old(i)=1073741822, \old(n)=1073741823, \old(x)=0, \old(y)=1073741822, a={1:0}, a={1:0}, i=1073741822, n=1073741823, x=0, y=1073741822] [L15] CALL __VERIFIER_assert(0 <= x && y < n) VAL [\old(cond)=1] [L6] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L15] RET __VERIFIER_assert(0 <= x && y < n) VAL [\old(i)=1073741822, \old(n)=1073741823, \old(x)=0, \old(y)=1073741822, a={1:0}, a={1:0}, i=1073741822, n=1073741823, x=0, y=1073741822] [L18] int x0 = x; [L19] int y0 = y; VAL [\old(i)=1073741822, \old(n)=1073741823, \old(x)=0, \old(y)=1073741822, a={1:0}, a={1:0}, i=1073741822, n=1073741823, x=0, x0=0, y=1073741822, y0=1073741822] [L21] a[x] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 62 locations, 16 error locations. Result: UNSAFE, OverallTime: 37.9s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 11.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 148 SDtfs, 402 SDslu, 572 SDs, 0 SdLazy, 827 SolverSat, 78 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 164 GetRequests, 101 SyntacticMatches, 14 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 26.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred 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, 4 MinimizatonAttempts, 33 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 24.7s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 146 ConstructedInterpolants, 40 QuantifiedInterpolants, 38417 SizeOfPredicates, 15 NumberOfNonLiveVariables, 268 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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...