./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 678e0110 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_891ca630-e71b-4954-9bbc-08d4a98f3289/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_891ca630-e71b-4954-9bbc-08d4a98f3289/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_891ca630-e71b-4954-9bbc-08d4a98f3289/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_891ca630-e71b-4954-9bbc-08d4a98f3289/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_891ca630-e71b-4954-9bbc-08d4a98f3289/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_891ca630-e71b-4954-9bbc-08d4a98f3289/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 d452f938d74713dbff7e0330f8ef393409d67ffe ..................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-678e011 [2019-11-19 23:28:29,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 23:28:29,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 23:28:29,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 23:28:29,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 23:28:29,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 23:28:29,568 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 23:28:29,578 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 23:28:29,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 23:28:29,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 23:28:29,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 23:28:29,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 23:28:29,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 23:28:29,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 23:28:29,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 23:28:29,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 23:28:29,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 23:28:29,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 23:28:29,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 23:28:29,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 23:28:29,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 23:28:29,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 23:28:29,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 23:28:29,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 23:28:29,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 23:28:29,612 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 23:28:29,613 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 23:28:29,614 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 23:28:29,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 23:28:29,615 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 23:28:29,615 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 23:28:29,616 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 23:28:29,617 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 23:28:29,617 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 23:28:29,618 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 23:28:29,618 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 23:28:29,619 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 23:28:29,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 23:28:29,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 23:28:29,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 23:28:29,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 23:28:29,622 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_891ca630-e71b-4954-9bbc-08d4a98f3289/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-19 23:28:29,645 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 23:28:29,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 23:28:29,655 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 23:28:29,655 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 23:28:29,655 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 23:28:29,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 23:28:29,656 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 23:28:29,656 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-19 23:28:29,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 23:28:29,657 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 23:28:29,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 23:28:29,658 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-19 23:28:29,658 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-19 23:28:29,658 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-19 23:28:29,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 23:28:29,659 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-19 23:28:29,659 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-19 23:28:29,659 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 23:28:29,659 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 23:28:29,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 23:28:29,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 23:28:29,660 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 23:28:29,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 23:28:29,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 23:28:29,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 23:28:29,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 23:28:29,661 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-19 23:28:29,661 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-19 23:28:29,661 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-19 23:28:29,662 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_891ca630-e71b-4954-9bbc-08d4a98f3289/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 -> d452f938d74713dbff7e0330f8ef393409d67ffe [2019-11-19 23:28:29,829 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 23:28:29,845 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 23:28:29,848 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 23:28:29,851 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 23:28:29,852 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 23:28:29,852 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_891ca630-e71b-4954-9bbc-08d4a98f3289/bin/uautomizer/../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c [2019-11-19 23:28:29,906 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_891ca630-e71b-4954-9bbc-08d4a98f3289/bin/uautomizer/data/58badee68/778e435b32fc46bbb6e8328f7933040b/FLAG24452d89d [2019-11-19 23:28:30,304 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 23:28:30,304 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_891ca630-e71b-4954-9bbc-08d4a98f3289/sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c [2019-11-19 23:28:30,309 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_891ca630-e71b-4954-9bbc-08d4a98f3289/bin/uautomizer/data/58badee68/778e435b32fc46bbb6e8328f7933040b/FLAG24452d89d [2019-11-19 23:28:30,322 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_891ca630-e71b-4954-9bbc-08d4a98f3289/bin/uautomizer/data/58badee68/778e435b32fc46bbb6e8328f7933040b [2019-11-19 23:28:30,326 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 23:28:30,327 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-19 23:28:30,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 23:28:30,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 23:28:30,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 23:28:30,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 11:28:30" (1/1) ... [2019-11-19 23:28:30,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e9a2f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:28:30, skipping insertion in model container [2019-11-19 23:28:30,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 11:28:30" (1/1) ... [2019-11-19 23:28:30,341 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 23:28:30,354 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 23:28:30,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 23:28:30,507 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 23:28:30,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 23:28:30,594 INFO L192 MainTranslator]: Completed translation [2019-11-19 23:28:30,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:28:30 WrapperNode [2019-11-19 23:28:30,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 23:28:30,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 23:28:30,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 23:28:30,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 23:28:30,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:28:30" (1/1) ... [2019-11-19 23:28:30,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:28:30" (1/1) ... [2019-11-19 23:28:30,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:28:30" (1/1) ... [2019-11-19 23:28:30,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:28:30" (1/1) ... [2019-11-19 23:28:30,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:28:30" (1/1) ... [2019-11-19 23:28:30,635 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:28:30" (1/1) ... [2019-11-19 23:28:30,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:28:30" (1/1) ... [2019-11-19 23:28:30,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 23:28:30,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 23:28:30,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 23:28:30,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 23:28:30,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:28:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_891ca630-e71b-4954-9bbc-08d4a98f3289/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) [2019-11-19 23:28:30,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 23:28:30,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 23:28:30,709 INFO L138 BoogieDeclarations]: Found implementation of procedure freePointer [2019-11-19 23:28:30,709 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-19 23:28:30,709 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-19 23:28:30,709 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-19 23:28:30,710 INFO L130 BoogieDeclarations]: Found specification of procedure freePointer [2019-11-19 23:28:30,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-19 23:28:30,710 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-19 23:28:30,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-19 23:28:30,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-19 23:28:30,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-19 23:28:30,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 23:28:30,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-19 23:28:31,027 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 23:28:31,027 INFO L285 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-19 23:28:31,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:28:31 BoogieIcfgContainer [2019-11-19 23:28:31,029 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 23:28:31,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 23:28:31,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 23:28:31,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 23:28:31,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 11:28:30" (1/3) ... [2019-11-19 23:28:31,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@242a94a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 11:28:31, skipping insertion in model container [2019-11-19 23:28:31,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:28:30" (2/3) ... [2019-11-19 23:28:31,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@242a94a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 11:28:31, skipping insertion in model container [2019-11-19 23:28:31,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:28:31" (3/3) ... [2019-11-19 23:28:31,039 INFO L109 eAbstractionObserver]: Analyzing ICFG derefAfterFree1.c [2019-11-19 23:28:31,048 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 23:28:31,057 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-11-19 23:28:31,068 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-11-19 23:28:31,088 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 23:28:31,088 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-19 23:28:31,088 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 23:28:31,088 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 23:28:31,088 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 23:28:31,088 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 23:28:31,089 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 23:28:31,089 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 23:28:31,109 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-19 23:28:31,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-19 23:28:31,119 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:28:31,120 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:28:31,121 INFO L410 AbstractCegarLoop]: === Iteration 1 === [freePointerErr2ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-19 23:28:31,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:28:31,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1608321379, now seen corresponding path program 1 times [2019-11-19 23:28:31,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:28:31,138 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [821133392] [2019-11-19 23:28:31,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_891ca630-e71b-4954-9bbc-08d4a98f3289/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 [2019-11-19 23:28:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:28:31,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 23:28:31,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:28:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:28:31,346 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:28:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:28:31,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [821133392] [2019-11-19 23:28:31,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:28:31,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-19 23:28:31,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122603939] [2019-11-19 23:28:31,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 23:28:31,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:28:31,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 23:28:31,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-19 23:28:31,385 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2019-11-19 23:28:31,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:28:31,449 INFO L93 Difference]: Finished difference Result 24 states and 23 transitions. [2019-11-19 23:28:31,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 23:28:31,451 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-19 23:28:31,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:28:31,458 INFO L225 Difference]: With dead ends: 24 [2019-11-19 23:28:31,458 INFO L226 Difference]: Without dead ends: 21 [2019-11-19 23:28:31,460 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-19 23:28:31,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-19 23:28:31,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-19 23:28:31,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-19 23:28:31,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20 transitions. [2019-11-19 23:28:31,491 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 20 transitions. Word has length 9 [2019-11-19 23:28:31,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:28:31,492 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 20 transitions. [2019-11-19 23:28:31,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 23:28:31,492 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 20 transitions. [2019-11-19 23:28:31,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-19 23:28:31,492 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:28:31,493 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:28:31,694 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:28:31,694 INFO L410 AbstractCegarLoop]: === Iteration 2 === [freePointerErr2ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-19 23:28:31,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:28:31,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1681644769, now seen corresponding path program 1 times [2019-11-19 23:28:31,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:28:31,695 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [566550646] [2019-11-19 23:28:31,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_891ca630-e71b-4954-9bbc-08d4a98f3289/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 [2019-11-19 23:28:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:28:31,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 23:28:31,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:28:31,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:28:31,878 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:28:31,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:28:31,989 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [566550646] [2019-11-19 23:28:31,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:28:31,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2019-11-19 23:28:31,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684110558] [2019-11-19 23:28:31,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-19 23:28:31,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:28:31,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-19 23:28:31,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-19 23:28:31,991 INFO L87 Difference]: Start difference. First operand 21 states and 20 transitions. Second operand 9 states. [2019-11-19 23:28:32,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:28:32,106 INFO L93 Difference]: Finished difference Result 20 states and 19 transitions. [2019-11-19 23:28:32,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 23:28:32,107 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2019-11-19 23:28:32,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:28:32,107 INFO L225 Difference]: With dead ends: 20 [2019-11-19 23:28:32,108 INFO L226 Difference]: Without dead ends: 20 [2019-11-19 23:28:32,108 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-19 23:28:32,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-19 23:28:32,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-19 23:28:32,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-19 23:28:32,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 19 transitions. [2019-11-19 23:28:32,112 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 19 transitions. Word has length 10 [2019-11-19 23:28:32,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:28:32,112 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 19 transitions. [2019-11-19 23:28:32,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-19 23:28:32,113 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 19 transitions. [2019-11-19 23:28:32,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-19 23:28:32,113 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:28:32,113 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:28:32,315 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:28:32,315 INFO L410 AbstractCegarLoop]: === Iteration 3 === [freePointerErr2ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-19 23:28:32,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:28:32,315 INFO L82 PathProgramCache]: Analyzing trace with hash -591380251, now seen corresponding path program 1 times [2019-11-19 23:28:32,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:28:32,316 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1978726606] [2019-11-19 23:28:32,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_891ca630-e71b-4954-9bbc-08d4a98f3289/bin/uautomizer/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 [2019-11-19 23:28:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:28:32,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 23:28:32,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:28:32,403 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 [2019-11-19 23:28:32,404 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:28:32,407 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:28:32,407 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:28:32,407 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-19 23:28:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:28:32,445 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:28:32,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:28:32,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1978726606] [2019-11-19 23:28:32,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:28:32,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-19 23:28:32,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802341073] [2019-11-19 23:28:32,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 23:28:32,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:28:32,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 23:28:32,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-19 23:28:32,465 INFO L87 Difference]: Start difference. First operand 20 states and 19 transitions. Second operand 5 states. [2019-11-19 23:28:32,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:28:32,554 INFO L93 Difference]: Finished difference Result 19 states and 18 transitions. [2019-11-19 23:28:32,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 23:28:32,555 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-19 23:28:32,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:28:32,556 INFO L225 Difference]: With dead ends: 19 [2019-11-19 23:28:32,556 INFO L226 Difference]: Without dead ends: 19 [2019-11-19 23:28:32,556 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-19 23:28:32,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-19 23:28:32,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-19 23:28:32,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-19 23:28:32,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2019-11-19 23:28:32,559 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 11 [2019-11-19 23:28:32,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:28:32,559 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2019-11-19 23:28:32,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 23:28:32,560 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2019-11-19 23:28:32,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-19 23:28:32,560 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:28:32,560 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:28:32,761 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:28:32,761 INFO L410 AbstractCegarLoop]: === Iteration 4 === [freePointerErr2ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-19 23:28:32,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:28:32,761 INFO L82 PathProgramCache]: Analyzing trace with hash 146827991, now seen corresponding path program 1 times [2019-11-19 23:28:32,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:28:32,762 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [967354253] [2019-11-19 23:28:32,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_891ca630-e71b-4954-9bbc-08d4a98f3289/bin/uautomizer/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 [2019-11-19 23:28:32,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 23:28:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 23:28:32,881 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-19 23:28:32,881 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-19 23:28:33,082 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:28:33,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 11:28:33 BoogieIcfgContainer [2019-11-19 23:28:33,099 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 23:28:33,100 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 23:28:33,100 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 23:28:33,100 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 23:28:33,101 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:28:31" (3/4) ... [2019-11-19 23:28:33,103 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-19 23:28:33,139 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_891ca630-e71b-4954-9bbc-08d4a98f3289/bin/uautomizer/witness.graphml [2019-11-19 23:28:33,139 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 23:28:33,140 INFO L168 Benchmark]: Toolchain (without parser) took 2813.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 948.7 MB in the beginning and 1.0 GB in the end (delta: -67.2 MB). Peak memory consumption was 69.6 MB. Max. memory is 11.5 GB. [2019-11-19 23:28:33,141 INFO L168 Benchmark]: CDTParser took 0.61 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. [2019-11-19 23:28:33,142 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 948.7 MB in the beginning and 1.1 GB in the end (delta: -182.8 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-11-19 23:28:33,142 INFO L168 Benchmark]: Boogie Preprocessor took 45.72 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. [2019-11-19 23:28:33,143 INFO L168 Benchmark]: RCFGBuilder took 385.72 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: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-11-19 23:28:33,143 INFO L168 Benchmark]: TraceAbstraction took 2069.92 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: 91.9 MB). Peak memory consumption was 91.9 MB. Max. memory is 11.5 GB. [2019-11-19 23:28:33,144 INFO L168 Benchmark]: Witness Printer took 39.26 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-19 23:28:33,147 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.61 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 268.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 948.7 MB in the beginning and 1.1 GB in the end (delta: -182.8 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 45.72 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 385.72 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: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2069.92 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: 91.9 MB). Peak memory consumption was 91.9 MB. Max. memory is 11.5 GB. * Witness Printer took 39.26 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L10] int* p = malloc(10 * sizeof(int)); VAL [malloc(10 * sizeof(int))={2:0}, p={2:0}] [L12] CALL freePointer(p) VAL [p={2:0}] [L6] free(p) VAL [p={2:0}, p={2:0}] [L6] free(p) VAL [p={2:0}, p={2:0}] [L6] free(p) [L12] RET freePointer(p) VAL [malloc(10 * sizeof(int))={2:0}, p={2:0}] [L14] p[0] = 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 6 error locations. Result: UNSAFE, OverallTime: 2.0s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 47 SDslu, 80 SDs, 0 SdLazy, 89 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 44 NumberOfCodeBlocks, 44 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 1466 SizeOfPredicates, 8 NumberOfNonLiveVariables, 115 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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...