./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/lcp.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_d87de284-04ef-4fd1-8fa6-c4f4ffd3792f/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_d87de284-04ef-4fd1-8fa6-c4f4ffd3792f/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d87de284-04ef-4fd1-8fa6-c4f4ffd3792f/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d87de284-04ef-4fd1-8fa6-c4f4ffd3792f/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/lcp.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d87de284-04ef-4fd1-8fa6-c4f4ffd3792f/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d87de284-04ef-4fd1-8fa6-c4f4ffd3792f/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 17e6e52dd20f9be422d05cd630fd9252ae3011a2 ....................................................................................................................................................................................................................................................................................................... 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 08:57:51,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:57:51,074 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:57:51,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:57:51,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:57:51,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:57:51,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:57:51,102 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:57:51,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:57:51,110 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:57:51,111 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:57:51,112 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:57:51,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:57:51,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:57:51,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:57:51,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:57:51,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:57:51,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:57:51,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:57:51,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:57:51,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:57:51,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:57:51,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:57:51,133 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:57:51,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:57:51,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:57:51,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:57:51,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:57:51,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:57:51,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:57:51,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:57:51,139 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:57:51,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:57:51,141 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:57:51,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:57:51,142 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:57:51,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:57:51,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:57:51,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:57:51,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:57:51,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:57:51,145 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d87de284-04ef-4fd1-8fa6-c4f4ffd3792f/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-25 08:57:51,169 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:57:51,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:57:51,170 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:57:51,170 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:57:51,170 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:57:51,171 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:57:51,171 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:57:51,171 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-25 08:57:51,171 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:57:51,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:57:51,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:57:51,172 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-25 08:57:51,172 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-25 08:57:51,172 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-25 08:57:51,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:57:51,173 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-25 08:57:51,173 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-25 08:57:51,173 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-25 08:57:51,173 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:57:51,173 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:57:51,173 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:57:51,174 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:57:51,174 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:57:51,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:57:51,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:57:51,174 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:57:51,175 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:57:51,175 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-25 08:57:51,175 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-25 08:57:51,175 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-25 08:57:51,175 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_d87de284-04ef-4fd1-8fa6-c4f4ffd3792f/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 -> 17e6e52dd20f9be422d05cd630fd9252ae3011a2 [2019-11-25 08:57:51,322 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:57:51,339 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:57:51,342 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:57:51,345 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:57:51,345 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:57:51,346 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d87de284-04ef-4fd1-8fa6-c4f4ffd3792f/bin/uautomizer/../../sv-benchmarks/c/verifythis/lcp.c [2019-11-25 08:57:51,411 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d87de284-04ef-4fd1-8fa6-c4f4ffd3792f/bin/uautomizer/data/5d93b51a0/845ba34e1d224489b941f67d771e69ed/FLAG84c9da346 [2019-11-25 08:57:51,820 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:57:51,821 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d87de284-04ef-4fd1-8fa6-c4f4ffd3792f/sv-benchmarks/c/verifythis/lcp.c [2019-11-25 08:57:51,826 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d87de284-04ef-4fd1-8fa6-c4f4ffd3792f/bin/uautomizer/data/5d93b51a0/845ba34e1d224489b941f67d771e69ed/FLAG84c9da346 [2019-11-25 08:57:51,837 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d87de284-04ef-4fd1-8fa6-c4f4ffd3792f/bin/uautomizer/data/5d93b51a0/845ba34e1d224489b941f67d771e69ed [2019-11-25 08:57:51,840 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:57:51,841 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-25 08:57:51,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:57:51,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:57:51,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:57:51,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:57:51" (1/1) ... [2019-11-25 08:57:51,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f972c20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:51, skipping insertion in model container [2019-11-25 08:57:51,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:57:51" (1/1) ... [2019-11-25 08:57:51,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:57:51,879 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:57:52,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:57:52,195 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:57:52,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:57:52,252 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:57:52,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:52 WrapperNode [2019-11-25 08:57:52,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:57:52,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:57:52,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:57:52,254 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:57:52,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:52" (1/1) ... [2019-11-25 08:57:52,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:52" (1/1) ... [2019-11-25 08:57:52,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:52" (1/1) ... [2019-11-25 08:57:52,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:52" (1/1) ... [2019-11-25 08:57:52,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:52" (1/1) ... [2019-11-25 08:57:52,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:52" (1/1) ... [2019-11-25 08:57:52,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:52" (1/1) ... [2019-11-25 08:57:52,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:57:52,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:57:52,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:57:52,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:57:52,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d87de284-04ef-4fd1-8fa6-c4f4ffd3792f/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 08:57:52,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-25 08:57:52,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:57:52,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-25 08:57:52,379 INFO L138 BoogieDeclarations]: Found implementation of procedure lcp [2019-11-25 08:57:52,379 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2019-11-25 08:57:52,379 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-25 08:57:52,379 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2019-11-25 08:57:52,379 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-25 08:57:52,379 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-25 08:57:52,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-25 08:57:52,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-25 08:57:52,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-25 08:57:52,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-25 08:57:52,380 INFO L130 BoogieDeclarations]: Found specification of procedure lcp [2019-11-25 08:57:52,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-25 08:57:52,380 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-11-25 08:57:52,380 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-25 08:57:52,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-25 08:57:52,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2019-11-25 08:57:52,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-25 08:57:52,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-25 08:57:52,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:57:52,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-25 08:57:52,916 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:57:52,917 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-25 08:57:52,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:57:52 BoogieIcfgContainer [2019-11-25 08:57:52,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:57:52,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:57:52,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:57:52,922 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:57:52,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:57:51" (1/3) ... [2019-11-25 08:57:52,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd8d8a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:57:52, skipping insertion in model container [2019-11-25 08:57:52,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:52" (2/3) ... [2019-11-25 08:57:52,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd8d8a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:57:52, skipping insertion in model container [2019-11-25 08:57:52,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:57:52" (3/3) ... [2019-11-25 08:57:52,925 INFO L109 eAbstractionObserver]: Analyzing ICFG lcp.c [2019-11-25 08:57:52,934 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:57:52,941 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 16 error locations. [2019-11-25 08:57:52,953 INFO L249 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2019-11-25 08:57:52,972 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:57:52,972 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-25 08:57:52,972 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:57:52,973 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:57:52,973 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:57:52,973 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:57:52,973 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:57:52,973 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:57:52,990 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2019-11-25 08:57:52,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-25 08:57:53,000 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:57:53,001 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:53,001 INFO L410 AbstractCegarLoop]: === Iteration 1 === [lcpErr3REQUIRES_VIOLATION, lcpErr2REQUIRES_VIOLATION, lcpErr1REQUIRES_VIOLATION, lcpErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2019-11-25 08:57:53,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:53,007 INFO L82 PathProgramCache]: Analyzing trace with hash 992921340, now seen corresponding path program 1 times [2019-11-25 08:57:53,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:57:53,019 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [370622414] [2019-11-25 08:57:53,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d87de284-04ef-4fd1-8fa6-c4f4ffd3792f/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 08:57:53,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:57:53,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-25 08:57:53,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:57:53,235 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 08:57:53,236 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:57:53,244 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:57:53,245 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:57:53,245 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-25 08:57:53,330 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 08:57:53,330 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:57:53,356 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 08:57:53,357 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [370622414] [2019-11-25 08:57:53,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:57:53,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 6 [2019-11-25 08:57:53,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738324974] [2019-11-25 08:57:53,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-25 08:57:53,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:57:53,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-25 08:57:53,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:57:53,380 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 7 states. [2019-11-25 08:57:53,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:57:53,789 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2019-11-25 08:57:53,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:57:53,793 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-11-25 08:57:53,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:57:53,804 INFO L225 Difference]: With dead ends: 60 [2019-11-25 08:57:53,804 INFO L226 Difference]: Without dead ends: 57 [2019-11-25 08:57:53,807 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-25 08:57:53,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-25 08:57:53,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-11-25 08:57:53,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-25 08:57:53,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2019-11-25 08:57:53,846 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 16 [2019-11-25 08:57:53,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:57:53,847 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2019-11-25 08:57:53,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-25 08:57:53,847 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2019-11-25 08:57:53,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-25 08:57:53,848 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:57:53,848 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:54,049 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:57:54,050 INFO L410 AbstractCegarLoop]: === Iteration 2 === [lcpErr3REQUIRES_VIOLATION, lcpErr2REQUIRES_VIOLATION, lcpErr1REQUIRES_VIOLATION, lcpErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2019-11-25 08:57:54,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:54,051 INFO L82 PathProgramCache]: Analyzing trace with hash 992921341, now seen corresponding path program 1 times [2019-11-25 08:57:54,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:57:54,052 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1837530949] [2019-11-25 08:57:54,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d87de284-04ef-4fd1-8fa6-c4f4ffd3792f/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 08:57:54,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:57:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:57:54,260 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-25 08:57:54,260 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-25 08:57:54,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:57:54,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:57:54 BoogieIcfgContainer [2019-11-25 08:57:54,481 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:57:54,482 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:57:54,482 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:57:54,482 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:57:54,483 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:57:52" (3/4) ... [2019-11-25 08:57:54,485 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-25 08:57:54,524 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d87de284-04ef-4fd1-8fa6-c4f4ffd3792f/bin/uautomizer/witness.graphml [2019-11-25 08:57:54,524 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:57:54,526 INFO L168 Benchmark]: Toolchain (without parser) took 2685.00 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 946.1 MB in the beginning and 1.0 GB in the end (delta: -88.1 MB). Peak memory consumption was 58.2 MB. Max. memory is 11.5 GB. [2019-11-25 08:57:54,526 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:57:54,527 INFO L168 Benchmark]: CACSL2BoogieTranslator took 411.73 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -195.1 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. [2019-11-25 08:57:54,528 INFO L168 Benchmark]: Boogie Preprocessor took 59.49 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-25 08:57:54,528 INFO L168 Benchmark]: RCFGBuilder took 604.80 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 08:57:54,529 INFO L168 Benchmark]: TraceAbstraction took 1562.53 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: 72.5 MB). Peak memory consumption was 72.5 MB. Max. memory is 11.5 GB. [2019-11-25 08:57:54,529 INFO L168 Benchmark]: Witness Printer took 42.75 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 08:57:54,532 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 411.73 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -195.1 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 59.49 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 604.80 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 1562.53 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: 72.5 MB). Peak memory consumption was 72.5 MB. Max. memory is 11.5 GB. * Witness Printer took 42.75 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: 13]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L31] int n = __VERIFIER_nondet_int(); [L34] EXPR, FCALL calloc(n, sizeof(int)) VAL [calloc(n, sizeof(int))={1:0}, n=805306369] [L34] int *a = calloc(n, sizeof(int)); [L36] int x = __VERIFIER_nondet_int(); [L37] int y = __VERIFIER_nondet_int(); [L39] CALL lcp(a, n, x, y) VAL [\old(n)=805306369, \old(x)=536870925, \old(y)=805306368, a={1:0}] [L12] int l = 0; VAL [\old(n)=805306369, \old(x)=536870925, \old(y)=805306368, a={1:0}, a={1:0}, l=0, n=805306369, x=536870925, y=805306368] [L13] x+l