./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/derefInLoop1.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_b433cbc8-9439-4908-b8df-d60e838268dc/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_b433cbc8-9439-4908-b8df-d60e838268dc/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b433cbc8-9439-4908-b8df-d60e838268dc/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b433cbc8-9439-4908-b8df-d60e838268dc/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefInLoop1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b433cbc8-9439-4908-b8df-d60e838268dc/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b433cbc8-9439-4908-b8df-d60e838268dc/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 aa3ae4378a5284e50be7191d52900376e96b0fdc ............................................................................................................................................................................................................................................................................................................................................................................................................................. 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 [2019-11-20 05:20:01,769 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 05:20:01,771 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 05:20:01,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 05:20:01,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 05:20:01,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 05:20:01,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 05:20:01,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 05:20:01,800 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 05:20:01,804 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 05:20:01,805 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 05:20:01,806 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 05:20:01,807 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 05:20:01,809 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 05:20:01,810 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 05:20:01,811 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 05:20:01,812 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 05:20:01,813 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 05:20:01,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 05:20:01,818 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 05:20:01,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 05:20:01,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 05:20:01,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 05:20:01,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 05:20:01,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 05:20:01,829 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 05:20:01,830 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 05:20:01,831 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 05:20:01,831 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 05:20:01,832 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 05:20:01,832 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 05:20:01,833 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 05:20:01,834 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 05:20:01,835 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 05:20:01,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 05:20:01,836 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 05:20:01,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 05:20:01,836 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 05:20:01,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 05:20:01,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 05:20:01,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 05:20:01,839 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b433cbc8-9439-4908-b8df-d60e838268dc/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 05:20:01,863 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 05:20:01,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 05:20:01,873 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 05:20:01,873 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 05:20:01,874 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 05:20:01,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 05:20:01,874 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 05:20:01,874 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 05:20:01,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 05:20:01,875 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 05:20:01,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 05:20:01,875 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 05:20:01,875 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 05:20:01,875 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 05:20:01,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 05:20:01,876 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 05:20:01,876 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 05:20:01,876 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 05:20:01,876 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 05:20:01,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 05:20:01,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 05:20:01,877 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 05:20:01,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 05:20:01,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 05:20:01,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 05:20:01,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 05:20:01,879 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 05:20:01,879 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 05:20:01,879 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 05:20:01,879 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_b433cbc8-9439-4908-b8df-d60e838268dc/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 -> aa3ae4378a5284e50be7191d52900376e96b0fdc [2019-11-20 05:20:02,043 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 05:20:02,059 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 05:20:02,062 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 05:20:02,063 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 05:20:02,064 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 05:20:02,064 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b433cbc8-9439-4908-b8df-d60e838268dc/bin/uautomizer/../../sv-benchmarks/c/memsafety-ext3/derefInLoop1.c [2019-11-20 05:20:02,119 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b433cbc8-9439-4908-b8df-d60e838268dc/bin/uautomizer/data/4ccdf83ce/134d33985d4f4e8b9eadb6cdef237296/FLAGbc0875112 [2019-11-20 05:20:02,510 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 05:20:02,511 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b433cbc8-9439-4908-b8df-d60e838268dc/sv-benchmarks/c/memsafety-ext3/derefInLoop1.c [2019-11-20 05:20:02,516 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b433cbc8-9439-4908-b8df-d60e838268dc/bin/uautomizer/data/4ccdf83ce/134d33985d4f4e8b9eadb6cdef237296/FLAGbc0875112 [2019-11-20 05:20:02,895 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b433cbc8-9439-4908-b8df-d60e838268dc/bin/uautomizer/data/4ccdf83ce/134d33985d4f4e8b9eadb6cdef237296 [2019-11-20 05:20:02,898 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 05:20:02,899 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 05:20:02,900 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 05:20:02,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 05:20:02,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 05:20:02,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:20:02" (1/1) ... [2019-11-20 05:20:02,906 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b3c7c74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:20:02, skipping insertion in model container [2019-11-20 05:20:02,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:20:02" (1/1) ... [2019-11-20 05:20:02,913 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 05:20:02,927 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 05:20:03,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 05:20:03,119 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 05:20:03,194 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 05:20:03,208 INFO L192 MainTranslator]: Completed translation [2019-11-20 05:20:03,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:20:03 WrapperNode [2019-11-20 05:20:03,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 05:20:03,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 05:20:03,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 05:20:03,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 05:20:03,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:20:03" (1/1) ... [2019-11-20 05:20:03,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:20:03" (1/1) ... [2019-11-20 05:20:03,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:20:03" (1/1) ... [2019-11-20 05:20:03,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:20:03" (1/1) ... [2019-11-20 05:20:03,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:20:03" (1/1) ... [2019-11-20 05:20:03,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:20:03" (1/1) ... [2019-11-20 05:20:03,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:20:03" (1/1) ... [2019-11-20 05:20:03,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 05:20:03,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 05:20:03,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 05:20:03,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 05:20:03,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:20:03" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b433cbc8-9439-4908-b8df-d60e838268dc/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 [2019-11-20 05:20:03,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 05:20:03,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 05:20:03,344 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 05:20:03,345 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 05:20:03,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 05:20:03,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-20 05:20:03,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 05:20:03,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 05:20:03,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 05:20:03,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-20 05:20:03,557 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 05:20:03,557 INFO L285 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-20 05:20:03,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:20:03 BoogieIcfgContainer [2019-11-20 05:20:03,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 05:20:03,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 05:20:03,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 05:20:03,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 05:20:03,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:20:02" (1/3) ... [2019-11-20 05:20:03,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b333a0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:20:03, skipping insertion in model container [2019-11-20 05:20:03,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:20:03" (2/3) ... [2019-11-20 05:20:03,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b333a0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:20:03, skipping insertion in model container [2019-11-20 05:20:03,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:20:03" (3/3) ... [2019-11-20 05:20:03,565 INFO L109 eAbstractionObserver]: Analyzing ICFG derefInLoop1.c [2019-11-20 05:20:03,574 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 05:20:03,593 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-20 05:20:03,603 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-20 05:20:03,628 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 05:20:03,628 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 05:20:03,628 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 05:20:03,628 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 05:20:03,628 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 05:20:03,628 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 05:20:03,629 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 05:20:03,629 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 05:20:03,640 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-20 05:20:03,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 05:20:03,648 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:20:03,648 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:20:03,649 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 05:20:03,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:20:03,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1075805963, now seen corresponding path program 1 times [2019-11-20 05:20:03,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:20:03,664 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [37218797] [2019-11-20 05:20:03,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b433cbc8-9439-4908-b8df-d60e838268dc/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 [2019-11-20 05:20:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:20:03,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-20 05:20:03,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:20:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:20:03,782 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:20:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:20:03,801 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [37218797] [2019-11-20 05:20:03,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:20:03,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 05:20:03,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725243191] [2019-11-20 05:20:03,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-20 05:20:03,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:20:03,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-20 05:20:03,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 05:20:03,821 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2019-11-20 05:20:03,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:20:03,835 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2019-11-20 05:20:03,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 05:20:03,836 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-20 05:20:03,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:20:03,844 INFO L225 Difference]: With dead ends: 18 [2019-11-20 05:20:03,844 INFO L226 Difference]: Without dead ends: 15 [2019-11-20 05:20:03,845 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 05:20:03,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-20 05:20:03,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-20 05:20:03,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-20 05:20:03,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-11-20 05:20:03,878 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 9 [2019-11-20 05:20:03,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:20:03,879 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-11-20 05:20:03,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-20 05:20:03,879 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-11-20 05:20:03,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 05:20:03,879 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:20:03,880 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:20:04,080 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:20:04,081 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 05:20:04,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:20:04,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1075819417, now seen corresponding path program 1 times [2019-11-20 05:20:04,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:20:04,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1350711] [2019-11-20 05:20:04,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b433cbc8-9439-4908-b8df-d60e838268dc/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 [2019-11-20 05:20:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:20:04,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 05:20:04,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:20:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:20:04,152 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:20:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:20:04,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1350711] [2019-11-20 05:20:04,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:20:04,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 05:20:04,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049899453] [2019-11-20 05:20:04,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 05:20:04,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:20:04,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 05:20:04,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 05:20:04,161 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 3 states. [2019-11-20 05:20:04,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:20:04,190 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2019-11-20 05:20:04,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 05:20:04,190 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-20 05:20:04,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:20:04,191 INFO L225 Difference]: With dead ends: 18 [2019-11-20 05:20:04,191 INFO L226 Difference]: Without dead ends: 16 [2019-11-20 05:20:04,191 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 05:20:04,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-20 05:20:04,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-20 05:20:04,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-20 05:20:04,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-11-20 05:20:04,195 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 9 [2019-11-20 05:20:04,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:20:04,196 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-11-20 05:20:04,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 05:20:04,196 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-11-20 05:20:04,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 05:20:04,196 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:20:04,197 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:20:04,404 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:20:04,404 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 05:20:04,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:20:04,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1075817783, now seen corresponding path program 1 times [2019-11-20 05:20:04,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:20:04,405 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2017580115] [2019-11-20 05:20:04,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b433cbc8-9439-4908-b8df-d60e838268dc/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 [2019-11-20 05:20:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:20:04,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 05:20:04,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:20:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:20:04,468 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:20:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:20:04,477 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2017580115] [2019-11-20 05:20:04,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:20:04,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-20 05:20:04,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228356049] [2019-11-20 05:20:04,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 05:20:04,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:20:04,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 05:20:04,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 05:20:04,478 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 3 states. [2019-11-20 05:20:04,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:20:04,500 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2019-11-20 05:20:04,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 05:20:04,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-20 05:20:04,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:20:04,502 INFO L225 Difference]: With dead ends: 18 [2019-11-20 05:20:04,502 INFO L226 Difference]: Without dead ends: 18 [2019-11-20 05:20:04,502 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 05:20:04,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-20 05:20:04,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-11-20 05:20:04,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-20 05:20:04,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-20 05:20:04,505 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2019-11-20 05:20:04,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:20:04,506 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-20 05:20:04,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 05:20:04,506 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-20 05:20:04,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 05:20:04,506 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:20:04,506 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:20:04,711 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:20:04,711 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 05:20:04,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:20:04,711 INFO L82 PathProgramCache]: Analyzing trace with hash -643356833, now seen corresponding path program 1 times [2019-11-20 05:20:04,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:20:04,712 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [576606665] [2019-11-20 05:20:04,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b433cbc8-9439-4908-b8df-d60e838268dc/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 [2019-11-20 05:20:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:20:04,774 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 05:20:04,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:20:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:20:04,800 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:20:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:20:04,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [576606665] [2019-11-20 05:20:04,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:20:04,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-20 05:20:04,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229033876] [2019-11-20 05:20:04,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 05:20:04,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:20:04,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 05:20:04,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-20 05:20:04,841 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 6 states. [2019-11-20 05:20:04,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:20:04,901 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-20 05:20:04,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 05:20:04,903 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-11-20 05:20:04,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:20:04,903 INFO L225 Difference]: With dead ends: 24 [2019-11-20 05:20:04,903 INFO L226 Difference]: Without dead ends: 24 [2019-11-20 05:20:04,904 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-20 05:20:04,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-20 05:20:04,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2019-11-20 05:20:04,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-20 05:20:04,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-20 05:20:04,907 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 12 [2019-11-20 05:20:04,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:20:04,907 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-20 05:20:04,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 05:20:04,909 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-20 05:20:04,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 05:20:04,910 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:20:04,910 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:20:05,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:20:05,111 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 05:20:05,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:20:05,112 INFO L82 PathProgramCache]: Analyzing trace with hash -643355199, now seen corresponding path program 1 times [2019-11-20 05:20:05,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:20:05,112 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [466376892] [2019-11-20 05:20:05,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b433cbc8-9439-4908-b8df-d60e838268dc/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:20:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 05:20:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 05:20:05,232 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-20 05:20:05,232 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 05:20:05,433 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:20:05,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 05:20:05 BoogieIcfgContainer [2019-11-20 05:20:05,451 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 05:20:05,452 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 05:20:05,452 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 05:20:05,452 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 05:20:05,453 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:20:03" (3/4) ... [2019-11-20 05:20:05,454 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 05:20:05,510 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b433cbc8-9439-4908-b8df-d60e838268dc/bin/uautomizer/witness.graphml [2019-11-20 05:20:05,510 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 05:20:05,512 INFO L168 Benchmark]: Toolchain (without parser) took 2612.39 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 102.8 MB). Free memory was 948.7 MB in the beginning and 982.3 MB in the end (delta: -33.6 MB). Peak memory consumption was 69.2 MB. Max. memory is 11.5 GB. [2019-11-20 05:20:05,512 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. [2019-11-20 05:20:05,513 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.92 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 102.8 MB). Free memory was 948.7 MB in the beginning and 1.1 GB in the end (delta: -143.0 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-20 05:20:05,514 INFO L168 Benchmark]: Boogie Preprocessor took 61.18 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 05:20:05,514 INFO L168 Benchmark]: RCFGBuilder took 287.76 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 11.5 GB. [2019-11-20 05:20:05,515 INFO L168 Benchmark]: TraceAbstraction took 1892.47 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 989.3 MB in the end (delta: 80.3 MB). Peak memory consumption was 80.3 MB. Max. memory is 11.5 GB. [2019-11-20 05:20:05,515 INFO L168 Benchmark]: Witness Printer took 58.26 ms. Allocated memory is still 1.1 GB. Free memory was 989.3 MB in the beginning and 982.3 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. [2019-11-20 05:20:05,518 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 308.92 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 102.8 MB). Free memory was 948.7 MB in the beginning and 1.1 GB in the end (delta: -143.0 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 61.18 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 287.76 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1892.47 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 989.3 MB in the end (delta: 80.3 MB). Peak memory consumption was 80.3 MB. Max. memory is 11.5 GB. * Witness Printer took 58.26 ms. Allocated memory is still 1.1 GB. Free memory was 989.3 MB in the beginning and 982.3 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L2] int* p; [L3] int i = 0; VAL [i=0] [L3] COND TRUE i < 2 [L4] int a[10]; VAL [a={2097155:0}, i=0] [L5] COND TRUE i == 0 [L6] p = a VAL [a={2097155:0}, i=0, p={2097155:0}] [L3] i++ [L3] COND TRUE i < 2 [L4] int a[10]; VAL [a={3:0}, i=1, p={2097155:0}] [L5] COND FALSE !(i == 0) VAL [a={3:0}, i=1, p={2097155:0}] [L8] p[0] = 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 18 locations, 3 error locations. Result: UNSAFE, OverallTime: 1.8s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 58 SDtfs, 13 SDslu, 54 SDs, 0 SdLazy, 39 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 51 NumberOfCodeBlocks, 51 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 70 ConstructedInterpolants, 0 QuantifiedInterpolants, 950 SizeOfPredicates, 2 NumberOfNonLiveVariables, 122 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 2/2 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...