./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/elimination_max.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/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_3e2175f3-084c-4738-94ba-66ee593f609c/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_3e2175f3-084c-4738-94ba-66ee593f609c/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3e2175f3-084c-4738-94ba-66ee593f609c/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3e2175f3-084c-4738-94ba-66ee593f609c/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/elimination_max.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3e2175f3-084c-4738-94ba-66ee593f609c/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3e2175f3-084c-4738-94ba-66ee593f609c/bin/uautomizer --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 2e9d0e89ee237165e6cd15cb730148b321ca31eb ............................................................................................................................................................................................................................................................................................... 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 [2019-11-25 08:48:18,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:48:18,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:48:18,265 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:48:18,266 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:48:18,267 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:48:18,269 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:48:18,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:48:18,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:48:18,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:48:18,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:48:18,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:48:18,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:48:18,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:48:18,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:48:18,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:48:18,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:48:18,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:48:18,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:48:18,302 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:48:18,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:48:18,311 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:48:18,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:48:18,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:48:18,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:48:18,317 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:48:18,317 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:48:18,319 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:48:18,319 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:48:18,320 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:48:18,320 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:48:18,321 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:48:18,322 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:48:18,322 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:48:18,323 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:48:18,323 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:48:18,324 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:48:18,324 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:48:18,324 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:48:18,325 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:48:18,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:48:18,327 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3e2175f3-084c-4738-94ba-66ee593f609c/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-25 08:48:18,352 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:48:18,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:48:18,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:48:18,354 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:48:18,354 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:48:18,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:48:18,354 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:48:18,355 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-25 08:48:18,355 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:48:18,355 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:48:18,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:48:18,355 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-25 08:48:18,355 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-25 08:48:18,356 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-25 08:48:18,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:48:18,356 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-25 08:48:18,356 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-25 08:48:18,356 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-25 08:48:18,357 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:48:18,357 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:48:18,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:48:18,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:48:18,357 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:48:18,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:48:18,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:48:18,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:48:18,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:48:18,358 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-25 08:48:18,359 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-25 08:48:18,359 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-25 08:48:18,359 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 -> /tmp/vcloud-vcloud-master/worker/run_dir_3e2175f3-084c-4738-94ba-66ee593f609c/bin/uautomizer 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 -> 2e9d0e89ee237165e6cd15cb730148b321ca31eb [2019-11-25 08:48:18,503 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:48:18,515 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:48:18,518 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:48:18,519 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:48:18,520 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:48:18,520 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3e2175f3-084c-4738-94ba-66ee593f609c/bin/uautomizer/../../sv-benchmarks/c/verifythis/elimination_max.c [2019-11-25 08:48:18,573 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3e2175f3-084c-4738-94ba-66ee593f609c/bin/uautomizer/data/d65a1fb1f/af1d287ec3b84f6ebef0b0ddd154505b/FLAGffce36d91 [2019-11-25 08:48:18,957 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:48:18,957 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3e2175f3-084c-4738-94ba-66ee593f609c/sv-benchmarks/c/verifythis/elimination_max.c [2019-11-25 08:48:18,964 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3e2175f3-084c-4738-94ba-66ee593f609c/bin/uautomizer/data/d65a1fb1f/af1d287ec3b84f6ebef0b0ddd154505b/FLAGffce36d91 [2019-11-25 08:48:19,302 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3e2175f3-084c-4738-94ba-66ee593f609c/bin/uautomizer/data/d65a1fb1f/af1d287ec3b84f6ebef0b0ddd154505b [2019-11-25 08:48:19,305 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:48:19,306 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-25 08:48:19,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:48:19,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:48:19,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:48:19,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:48:19" (1/1) ... [2019-11-25 08:48:19,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b151c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:19, skipping insertion in model container [2019-11-25 08:48:19,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:48:19" (1/1) ... [2019-11-25 08:48:19,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:48:19,343 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:48:19,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:48:19,608 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:48:19,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:48:19,743 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:48:19,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:19 WrapperNode [2019-11-25 08:48:19,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:48:19,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:48:19,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:48:19,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:48:19,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:19" (1/1) ... [2019-11-25 08:48:19,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:19" (1/1) ... [2019-11-25 08:48:19,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:19" (1/1) ... [2019-11-25 08:48:19,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:19" (1/1) ... [2019-11-25 08:48:19,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:19" (1/1) ... [2019-11-25 08:48:19,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:19" (1/1) ... [2019-11-25 08:48:19,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:19" (1/1) ... [2019-11-25 08:48:19,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:48:19,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:48:19,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:48:19,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:48:19,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3e2175f3-084c-4738-94ba-66ee593f609c/bin/uautomizer/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 [2019-11-25 08:48:19,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-25 08:48:19,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:48:19,868 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-25 08:48:19,869 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-25 08:48:19,869 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2019-11-25 08:48:19,869 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-25 08:48:19,869 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-25 08:48:19,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-25 08:48:19,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-25 08:48:19,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-25 08:48:19,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-25 08:48:19,870 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-25 08:48:19,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-25 08:48:19,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2019-11-25 08:48:19,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-25 08:48:19,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-25 08:48:19,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-25 08:48:19,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:48:19,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-25 08:48:20,335 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:48:20,336 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-25 08:48:20,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:48:20 BoogieIcfgContainer [2019-11-25 08:48:20,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:48:20,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:48:20,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:48:20,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:48:20,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:48:19" (1/3) ... [2019-11-25 08:48:20,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6055016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:48:20, skipping insertion in model container [2019-11-25 08:48:20,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:19" (2/3) ... [2019-11-25 08:48:20,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6055016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:48:20, skipping insertion in model container [2019-11-25 08:48:20,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:48:20" (3/3) ... [2019-11-25 08:48:20,345 INFO L109 eAbstractionObserver]: Analyzing ICFG elimination_max.c [2019-11-25 08:48:20,353 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:48:20,360 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 16 error locations. [2019-11-25 08:48:20,369 INFO L249 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2019-11-25 08:48:20,388 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:48:20,388 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-25 08:48:20,388 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:48:20,388 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:48:20,389 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:48:20,389 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:48:20,389 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:48:20,389 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:48:20,404 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2019-11-25 08:48:20,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-25 08:48:20,413 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:48:20,414 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:48:20,414 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-25 08:48:20,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:20,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1727612475, now seen corresponding path program 1 times [2019-11-25 08:48:20,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:48:20,428 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [433339565] [2019-11-25 08:48:20,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3e2175f3-084c-4738-94ba-66ee593f609c/bin/uautomizer/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 [2019-11-25 08:48:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:20,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-25 08:48:20,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:20,592 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 [2019-11-25 08:48:20,592 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:48:20,599 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:48:20,599 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:48:20,600 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-25 08:48:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:20,660 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:48:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:20,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [433339565] [2019-11-25 08:48:20,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:48:20,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 4 [2019-11-25 08:48:20,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144961435] [2019-11-25 08:48:20,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:48:20,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:48:20,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:48:20,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:48:20,723 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 5 states. [2019-11-25 08:48:20,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:20,971 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2019-11-25 08:48:20,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:48:20,973 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-11-25 08:48:20,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:48:20,981 INFO L225 Difference]: With dead ends: 46 [2019-11-25 08:48:20,981 INFO L226 Difference]: Without dead ends: 43 [2019-11-25 08:48:20,983 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:48:20,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-25 08:48:21,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-11-25 08:48:21,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-25 08:48:21,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2019-11-25 08:48:21,016 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 13 [2019-11-25 08:48:21,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:48:21,016 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2019-11-25 08:48:21,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:48:21,017 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2019-11-25 08:48:21,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-25 08:48:21,017 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:48:21,017 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:48:21,218 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:48:21,218 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-25 08:48:21,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:21,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1727612476, now seen corresponding path program 1 times [2019-11-25 08:48:21,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:48:21,220 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1136045121] [2019-11-25 08:48:21,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3e2175f3-084c-4738-94ba-66ee593f609c/bin/uautomizer/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 [2019-11-25 08:48:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:21,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:21,368 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-25 08:48:21,369 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-25 08:48:21,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:48:21,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:48:21 BoogieIcfgContainer [2019-11-25 08:48:21,591 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:48:21,591 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:48:21,592 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:48:21,592 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:48:21,592 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:48:20" (3/4) ... [2019-11-25 08:48:21,594 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-25 08:48:21,628 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_3e2175f3-084c-4738-94ba-66ee593f609c/bin/uautomizer/witness.graphml [2019-11-25 08:48:21,628 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:48:21,630 INFO L168 Benchmark]: Toolchain (without parser) took 2323.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 950.1 MB in the beginning and 1.0 GB in the end (delta: -97.5 MB). Peak memory consumption was 40.9 MB. Max. memory is 11.5 GB. [2019-11-25 08:48:21,630 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:48:21,631 INFO L168 Benchmark]: CACSL2BoogieTranslator took 437.81 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -183.0 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. [2019-11-25 08:48:21,632 INFO L168 Benchmark]: Boogie Preprocessor took 65.83 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:48:21,632 INFO L168 Benchmark]: RCFGBuilder took 526.25 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: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:48:21,633 INFO L168 Benchmark]: TraceAbstraction took 1252.64 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: 56.4 MB). Peak memory consumption was 56.4 MB. Max. memory is 11.5 GB. [2019-11-25 08:48:21,633 INFO L168 Benchmark]: Witness Printer took 36.94 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. [2019-11-25 08:48:21,636 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 437.81 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -183.0 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 65.83 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 526.25 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: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1252.64 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: 56.4 MB). Peak memory consumption was 56.4 MB. Max. memory is 11.5 GB. * Witness Printer took 36.94 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: 30]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L12] int n = __VERIFIER_nondet_int(); [L15] EXPR, FCALL calloc(n, sizeof(int)) VAL [calloc(n, sizeof(int))={1:0}, n=1073737728] [L15] int *a = calloc(n, sizeof(int)); [L17] int x = 0; [L18] int y = n - 1; VAL [a={1:0}, calloc(n, sizeof(int))={1:0}, n=1073737728, x=0, y=1073737727] [L20] COND TRUE x < y VAL [a={1:0}, calloc(n, sizeof(int))={1:0}, n=1073737728, x=0, y=1073737727] [L30] a[x] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 53 locations, 16 error locations. Result: UNSAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 30 SDtfs, 85 SDslu, 16 SDs, 0 SdLazy, 31 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 24 ConstructedInterpolants, 3 QuantifiedInterpolants, 1116 SizeOfPredicates, 1 NumberOfNonLiveVariables, 46 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...