./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/simple_built_from_end.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b5699aa Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d99818d3-84a4-47f8-885f-96cab0f4d524/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_d99818d3-84a4-47f8-885f-96cab0f4d524/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d99818d3-84a4-47f8-885f-96cab0f4d524/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d99818d3-84a4-47f8-885f-96cab0f4d524/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud-vcloud-master/worker/run_dir_d99818d3-84a4-47f8-885f-96cab0f4d524/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d99818d3-84a4-47f8-885f-96cab0f4d524/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 41b5142f2d6582efd6d9a128e4dfef83faaab097 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-25 08:57:10,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:57:10,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:57:10,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:57:10,925 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:57:10,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:57:10,929 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:57:10,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:57:10,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:57:10,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:57:10,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:57:10,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:57:10,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:57:10,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:57:10,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:57:10,955 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:57:10,956 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:57:10,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:57:10,959 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:57:10,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:57:10,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:57:10,971 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:57:10,973 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:57:10,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:57:10,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:57:10,976 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:57:10,977 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:57:10,978 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:57:10,979 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:57:10,980 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:57:10,980 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:57:10,981 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:57:10,982 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:57:10,982 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:57:10,983 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:57:10,983 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:57:10,984 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:57:10,984 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:57:10,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:57:10,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:57:10,986 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:57:10,987 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d99818d3-84a4-47f8-885f-96cab0f4d524/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-25 08:57:11,013 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:57:11,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:57:11,014 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:57:11,014 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:57:11,015 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:57:11,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:57:11,015 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:57:11,015 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-25 08:57:11,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:57:11,016 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:57:11,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:57:11,016 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-25 08:57:11,016 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-25 08:57:11,016 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-25 08:57:11,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:57:11,017 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-25 08:57:11,017 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-25 08:57:11,017 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-25 08:57:11,017 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:57:11,018 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:57:11,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:57:11,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:57:11,018 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:57:11,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:57:11,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:57:11,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:57:11,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:57:11,019 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-25 08:57:11,019 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-25 08:57:11,020 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-25 08:57:11,020 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_d99818d3-84a4-47f8-885f-96cab0f4d524/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 -> 41b5142f2d6582efd6d9a128e4dfef83faaab097 [2019-11-25 08:57:11,214 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:57:11,229 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:57:11,232 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:57:11,235 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:57:11,235 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:57:11,237 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d99818d3-84a4-47f8-885f-96cab0f4d524/bin/uautomizer/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2019-11-25 08:57:11,298 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d99818d3-84a4-47f8-885f-96cab0f4d524/bin/uautomizer/data/42e02a597/1edb8c95591249d3a4ee58e85e0bcd3c/FLAG61aae570e [2019-11-25 08:57:11,864 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:57:11,864 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d99818d3-84a4-47f8-885f-96cab0f4d524/sv-benchmarks/c/list-properties/simple_built_from_end.i [2019-11-25 08:57:11,877 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d99818d3-84a4-47f8-885f-96cab0f4d524/bin/uautomizer/data/42e02a597/1edb8c95591249d3a4ee58e85e0bcd3c/FLAG61aae570e [2019-11-25 08:57:12,136 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d99818d3-84a4-47f8-885f-96cab0f4d524/bin/uautomizer/data/42e02a597/1edb8c95591249d3a4ee58e85e0bcd3c [2019-11-25 08:57:12,138 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:57:12,140 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-25 08:57:12,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:57:12,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:57:12,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:57:12,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:57:12" (1/1) ... [2019-11-25 08:57:12,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1400e86a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:12, skipping insertion in model container [2019-11-25 08:57:12,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:57:12" (1/1) ... [2019-11-25 08:57:12,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:57:12,210 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:57:12,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:57:12,673 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:57:12,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:57:12,798 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:57:12,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:12 WrapperNode [2019-11-25 08:57:12,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:57:12,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:57:12,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:57:12,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:57:12,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:12" (1/1) ... [2019-11-25 08:57:12,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:12" (1/1) ... [2019-11-25 08:57:12,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:12" (1/1) ... [2019-11-25 08:57:12,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:12" (1/1) ... [2019-11-25 08:57:12,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:12" (1/1) ... [2019-11-25 08:57:12,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:12" (1/1) ... [2019-11-25 08:57:12,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:12" (1/1) ... [2019-11-25 08:57:12,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:57:12,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:57:12,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:57:12,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:57:12,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d99818d3-84a4-47f8-885f-96cab0f4d524/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:57:12,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-25 08:57:12,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:57:12,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2019-11-25 08:57:12,974 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-25 08:57:12,974 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-25 08:57:12,975 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-25 08:57:12,975 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-25 08:57:12,976 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-25 08:57:12,976 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-25 08:57:12,977 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-25 08:57:12,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-25 08:57:12,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-25 08:57:12,977 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-25 08:57:12,977 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-25 08:57:12,978 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-25 08:57:12,978 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-25 08:57:12,978 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-25 08:57:12,978 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-25 08:57:12,978 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-25 08:57:12,979 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-25 08:57:12,979 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-25 08:57:12,979 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-25 08:57:12,979 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-25 08:57:12,980 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-25 08:57:12,980 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-25 08:57:12,980 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-25 08:57:12,980 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-25 08:57:12,980 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-25 08:57:12,980 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-25 08:57:12,980 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-25 08:57:12,981 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-25 08:57:12,981 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-25 08:57:12,981 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-25 08:57:12,981 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-25 08:57:12,981 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-25 08:57:12,981 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-25 08:57:12,981 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-25 08:57:12,981 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-25 08:57:12,982 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-25 08:57:12,982 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-25 08:57:12,982 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-25 08:57:12,982 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-25 08:57:12,982 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-25 08:57:12,982 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-25 08:57:12,982 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-25 08:57:12,982 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-25 08:57:12,983 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-25 08:57:12,983 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-25 08:57:12,983 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-25 08:57:12,983 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-25 08:57:12,983 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-25 08:57:12,983 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-25 08:57:12,983 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-25 08:57:12,983 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-25 08:57:12,984 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-25 08:57:12,984 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-25 08:57:12,984 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-25 08:57:12,984 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-25 08:57:12,984 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-25 08:57:12,985 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-25 08:57:12,985 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-25 08:57:12,985 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-25 08:57:12,985 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-25 08:57:12,985 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-25 08:57:12,985 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-25 08:57:12,986 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-25 08:57:12,986 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-25 08:57:12,987 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-25 08:57:12,987 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-25 08:57:12,987 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-25 08:57:12,987 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-25 08:57:12,988 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-25 08:57:12,988 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-25 08:57:12,988 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-25 08:57:12,989 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-25 08:57:12,989 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-25 08:57:12,989 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-25 08:57:12,989 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-25 08:57:12,990 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-25 08:57:12,990 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-25 08:57:12,990 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-25 08:57:12,990 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-25 08:57:12,991 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-25 08:57:12,991 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-25 08:57:12,991 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-25 08:57:12,992 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-25 08:57:12,992 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-25 08:57:12,992 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-25 08:57:12,992 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-25 08:57:12,992 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-25 08:57:12,992 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-25 08:57:12,992 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-25 08:57:12,992 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-25 08:57:12,992 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-25 08:57:12,992 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-25 08:57:12,993 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-25 08:57:12,993 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-25 08:57:12,993 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-25 08:57:12,993 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-25 08:57:12,993 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-25 08:57:12,993 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-25 08:57:12,993 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-25 08:57:12,993 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-25 08:57:12,993 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-25 08:57:12,993 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-25 08:57:12,994 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-25 08:57:12,994 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-25 08:57:12,994 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-25 08:57:12,994 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-25 08:57:12,994 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-25 08:57:12,994 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-25 08:57:12,994 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-25 08:57:12,994 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-25 08:57:12,994 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-25 08:57:12,994 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-25 08:57:12,994 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-25 08:57:12,995 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-25 08:57:12,995 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-25 08:57:12,995 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-25 08:57:12,995 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-25 08:57:12,995 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-25 08:57:12,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-25 08:57:12,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-25 08:57:12,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-25 08:57:12,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-25 08:57:12,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-25 08:57:12,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-25 08:57:12,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:57:12,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2019-11-25 08:57:12,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-25 08:57:13,310 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-25 08:57:13,444 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:57:13,444 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-25 08:57:13,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:57:13 BoogieIcfgContainer [2019-11-25 08:57:13,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:57:13,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:57:13,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:57:13,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:57:13,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:57:12" (1/3) ... [2019-11-25 08:57:13,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58898c24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:57:13, skipping insertion in model container [2019-11-25 08:57:13,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:12" (2/3) ... [2019-11-25 08:57:13,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58898c24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:57:13, skipping insertion in model container [2019-11-25 08:57:13,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:57:13" (3/3) ... [2019-11-25 08:57:13,453 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2019-11-25 08:57:13,461 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:57:13,467 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2019-11-25 08:57:13,478 INFO L249 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2019-11-25 08:57:13,495 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:57:13,496 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-25 08:57:13,496 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:57:13,496 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:57:13,496 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:57:13,496 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:57:13,497 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:57:13,497 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:57:13,510 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-11-25 08:57:13,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-25 08:57:13,518 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:57:13,520 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:13,521 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:57:13,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:13,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1704950017, now seen corresponding path program 1 times [2019-11-25 08:57:13,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:57:13,536 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [773428312] [2019-11-25 08:57:13,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d99818d3-84a4-47f8-885f-96cab0f4d524/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:57:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:57:13,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-25 08:57:13,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:57:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:13,769 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:57:13,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:13,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [773428312] [2019-11-25 08:57:13,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:57:13,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-25 08:57:13,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968430128] [2019-11-25 08:57:13,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-25 08:57:13,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:57:13,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-25 08:57:13,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:57:13,806 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2019-11-25 08:57:13,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:57:13,898 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2019-11-25 08:57:13,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:57:13,899 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-25 08:57:13,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:57:13,908 INFO L225 Difference]: With dead ends: 45 [2019-11-25 08:57:13,908 INFO L226 Difference]: Without dead ends: 36 [2019-11-25 08:57:13,910 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 [2019-11-25 08:57:13,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-25 08:57:13,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2019-11-25 08:57:13,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-25 08:57:13,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-11-25 08:57:13,942 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 9 [2019-11-25 08:57:13,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:57:13,943 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-11-25 08:57:13,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-25 08:57:13,943 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-11-25 08:57:13,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-25 08:57:13,944 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:57:13,944 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:14,146 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:57:14,146 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:57:14,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:14,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1704950061, now seen corresponding path program 1 times [2019-11-25 08:57:14,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:57:14,147 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2028776695] [2019-11-25 08:57:14,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d99818d3-84a4-47f8-885f-96cab0f4d524/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:57:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:57:14,305 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-25 08:57:14,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:57:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:14,323 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:57:14,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:14,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2028776695] [2019-11-25 08:57:14,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:57:14,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-25 08:57:14,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101197839] [2019-11-25 08:57:14,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-25 08:57:14,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:57:14,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-25 08:57:14,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:57:14,333 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 3 states. [2019-11-25 08:57:14,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:57:14,385 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-25 08:57:14,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:57:14,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-25 08:57:14,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:57:14,387 INFO L225 Difference]: With dead ends: 36 [2019-11-25 08:57:14,387 INFO L226 Difference]: Without dead ends: 35 [2019-11-25 08:57:14,388 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 [2019-11-25 08:57:14,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-25 08:57:14,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2019-11-25 08:57:14,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-25 08:57:14,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-11-25 08:57:14,393 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 9 [2019-11-25 08:57:14,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:57:14,393 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-11-25 08:57:14,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-25 08:57:14,394 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-11-25 08:57:14,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-25 08:57:14,394 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:57:14,394 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:14,595 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:57:14,595 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:57:14,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:14,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1704951376, now seen corresponding path program 1 times [2019-11-25 08:57:14,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:57:14,596 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [888441838] [2019-11-25 08:57:14,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d99818d3-84a4-47f8-885f-96cab0f4d524/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 [2019-11-25 08:57:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:57:14,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-25 08:57:14,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:57:14,833 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-25 08:57:14,834 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:57:14,849 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:57:14,849 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:57:14,850 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-25 08:57:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:14,856 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:57:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:14,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [888441838] [2019-11-25 08:57:14,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:57:14,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-25 08:57:14,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524345258] [2019-11-25 08:57:14,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-25 08:57:14,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:57:14,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-25 08:57:14,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:57:14,870 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 3 states. [2019-11-25 08:57:14,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:57:14,938 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2019-11-25 08:57:14,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:57:14,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-25 08:57:14,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:57:14,940 INFO L225 Difference]: With dead ends: 25 [2019-11-25 08:57:14,940 INFO L226 Difference]: Without dead ends: 25 [2019-11-25 08:57:14,940 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 [2019-11-25 08:57:14,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-25 08:57:14,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-25 08:57:14,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-25 08:57:14,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-11-25 08:57:14,944 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 9 [2019-11-25 08:57:14,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:57:14,944 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-11-25 08:57:14,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-25 08:57:14,944 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-11-25 08:57:14,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-25 08:57:14,945 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:57:14,945 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:15,146 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:57:15,146 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:57:15,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:15,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1704951377, now seen corresponding path program 1 times [2019-11-25 08:57:15,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:57:15,147 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1573581069] [2019-11-25 08:57:15,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d99818d3-84a4-47f8-885f-96cab0f4d524/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 [2019-11-25 08:57:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:57:15,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-25 08:57:15,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:57:15,340 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-25 08:57:15,341 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:57:15,349 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:57:15,349 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:57:15,350 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-25 08:57:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:15,367 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:57:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:15,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1573581069] [2019-11-25 08:57:15,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:57:15,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-25 08:57:15,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35815224] [2019-11-25 08:57:15,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-25 08:57:15,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:57:15,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-25 08:57:15,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:57:15,405 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 4 states. [2019-11-25 08:57:15,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:57:15,458 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2019-11-25 08:57:15,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:57:15,458 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-25 08:57:15,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:57:15,459 INFO L225 Difference]: With dead ends: 23 [2019-11-25 08:57:15,459 INFO L226 Difference]: Without dead ends: 23 [2019-11-25 08:57:15,459 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:57:15,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-25 08:57:15,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-25 08:57:15,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-25 08:57:15,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-25 08:57:15,462 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 9 [2019-11-25 08:57:15,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:57:15,462 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-25 08:57:15,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-25 08:57:15,463 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-25 08:57:15,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-25 08:57:15,463 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:57:15,463 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:15,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:57:15,666 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:57:15,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:15,667 INFO L82 PathProgramCache]: Analyzing trace with hash -766497938, now seen corresponding path program 1 times [2019-11-25 08:57:15,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:57:15,667 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [920908540] [2019-11-25 08:57:15,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d99818d3-84a4-47f8-885f-96cab0f4d524/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 [2019-11-25 08:57:15,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:57:15,835 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:57:15,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:57:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:15,856 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:57:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:15,870 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [920908540] [2019-11-25 08:57:15,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:57:15,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-25 08:57:15,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144381201] [2019-11-25 08:57:15,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-25 08:57:15,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:57:15,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-25 08:57:15,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:57:15,871 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 4 states. [2019-11-25 08:57:15,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:57:15,985 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-25 08:57:15,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-25 08:57:15,986 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-25 08:57:15,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:57:15,987 INFO L225 Difference]: With dead ends: 36 [2019-11-25 08:57:15,987 INFO L226 Difference]: Without dead ends: 36 [2019-11-25 08:57:15,988 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:57:15,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-25 08:57:15,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2019-11-25 08:57:15,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-25 08:57:15,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-11-25 08:57:15,991 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 14 [2019-11-25 08:57:15,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:57:15,991 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-11-25 08:57:15,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-25 08:57:15,991 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-11-25 08:57:15,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-25 08:57:15,992 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:57:15,992 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:16,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:57:16,193 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:57:16,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:16,193 INFO L82 PathProgramCache]: Analyzing trace with hash -766497894, now seen corresponding path program 1 times [2019-11-25 08:57:16,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:57:16,194 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1576003909] [2019-11-25 08:57:16,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d99818d3-84a4-47f8-885f-96cab0f4d524/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:57:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:57:16,364 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-25 08:57:16,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:57:16,371 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-25 08:57:16,371 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:57:16,375 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:57:16,375 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:57:16,375 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-25 08:57:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:16,388 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:57:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:16,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1576003909] [2019-11-25 08:57:16,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:57:16,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-25 08:57:16,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141297718] [2019-11-25 08:57:16,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-25 08:57:16,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:57:16,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-25 08:57:16,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:57:16,396 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 4 states. [2019-11-25 08:57:16,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:57:16,515 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2019-11-25 08:57:16,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-25 08:57:16,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-25 08:57:16,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:57:16,517 INFO L225 Difference]: With dead ends: 29 [2019-11-25 08:57:16,517 INFO L226 Difference]: Without dead ends: 29 [2019-11-25 08:57:16,517 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:57:16,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-25 08:57:16,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2019-11-25 08:57:16,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-25 08:57:16,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-25 08:57:16,522 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2019-11-25 08:57:16,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:57:16,522 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-25 08:57:16,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-25 08:57:16,522 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-25 08:57:16,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-25 08:57:16,523 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:57:16,523 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:16,725 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:57:16,725 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:57:16,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:16,726 INFO L82 PathProgramCache]: Analyzing trace with hash -766497893, now seen corresponding path program 1 times [2019-11-25 08:57:16,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:57:16,726 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [185444513] [2019-11-25 08:57:16,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d99818d3-84a4-47f8-885f-96cab0f4d524/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:57:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:57:16,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:57:16,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:57:16,899 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-25 08:57:16,899 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:57:16,904 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:57:16,904 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:57:16,904 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-25 08:57:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:16,930 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:57:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:17,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [185444513] [2019-11-25 08:57:17,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:57:17,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-25 08:57:17,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723323393] [2019-11-25 08:57:17,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:57:17,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:57:17,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:57:17,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:57:17,015 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2019-11-25 08:57:17,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:57:17,188 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2019-11-25 08:57:17,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:57:17,188 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-25 08:57:17,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:57:17,189 INFO L225 Difference]: With dead ends: 31 [2019-11-25 08:57:17,189 INFO L226 Difference]: Without dead ends: 31 [2019-11-25 08:57:17,189 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:57:17,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-25 08:57:17,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2019-11-25 08:57:17,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-25 08:57:17,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-25 08:57:17,192 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 14 [2019-11-25 08:57:17,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:57:17,193 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-25 08:57:17,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:57:17,193 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-25 08:57:17,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-25 08:57:17,193 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:57:17,194 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:17,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:57:17,396 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:57:17,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:17,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1985510737, now seen corresponding path program 1 times [2019-11-25 08:57:17,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:57:17,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [64448620] [2019-11-25 08:57:17,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d99818d3-84a4-47f8-885f-96cab0f4d524/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:57:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:57:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:57:17,662 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-25 08:57:17,662 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-25 08:57:17,863 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:57:17,872 WARN L417 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2019-11-25 08:57:17,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:57:17 BoogieIcfgContainer [2019-11-25 08:57:17,886 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:57:17,886 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:57:17,886 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:57:17,886 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:57:17,887 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:57:13" (3/4) ... [2019-11-25 08:57:17,890 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-25 08:57:17,890 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:57:17,891 INFO L168 Benchmark]: Toolchain (without parser) took 5751.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 210.2 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -185.6 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. [2019-11-25 08:57:17,891 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:57:17,892 INFO L168 Benchmark]: CACSL2BoogieTranslator took 658.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -167.0 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2019-11-25 08:57:17,892 INFO L168 Benchmark]: Boogie Preprocessor took 112.38 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:57:17,893 INFO L168 Benchmark]: RCFGBuilder took 533.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 48.4 MB). Peak memory consumption was 48.4 MB. Max. memory is 11.5 GB. [2019-11-25 08:57:17,894 INFO L168 Benchmark]: TraceAbstraction took 4439.57 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 67.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -67.1 MB). Peak memory consumption was 565.3 kB. Max. memory is 11.5 GB. [2019-11-25 08:57:17,894 INFO L168 Benchmark]: Witness Printer took 3.96 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:57:17,896 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 658.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -167.0 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 112.38 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 533.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 48.4 MB). Peak memory consumption was 48.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4439.57 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 67.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -67.1 MB). Peak memory consumption was 565.3 kB. Max. memory is 11.5 GB. * Witness Printer took 3.96 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. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 520]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 520. Possible FailurePath: [L521] List t; [L522] List p = 0; VAL [p={0:0}] [L523] COND TRUE __VERIFIER_nondet_int() [L524] t = (List) malloc(sizeof(struct node)) VAL [malloc(sizeof(struct node))={-2147483648:0}, p={0:0}, t={-2147483648:0}] [L525] COND FALSE !(t == 0) VAL [malloc(sizeof(struct node))={-2147483648:0}, p={0:0}, t={-2147483648:0}] [L526] t->h = 1 VAL [malloc(sizeof(struct node))={-2147483648:0}, p={0:0}, t={-2147483648:0}] [L527] t->n = p VAL [malloc(sizeof(struct node))={-2147483648:0}, p={0:0}, t={-2147483648:0}] [L528] p = t VAL [malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, t={-2147483648:0}] [L523] COND FALSE !(__VERIFIER_nondet_int()) [L530] COND TRUE p!=0 VAL [malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, t={-2147483648:0}] [L531] EXPR p->h VAL [malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, p->h=1, t={-2147483648:0}] [L531] COND FALSE !(p->h != 1) [L534] EXPR p->n VAL [malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, p->n={0:0}, t={-2147483648:0}] [L534] p = p->n [L530] COND FALSE !(p!=0) VAL [malloc(sizeof(struct node))={-2147483648:0}, p={0:0}, t={-2147483648:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 55 locations, 9 error locations. Result: UNSAFE, OverallTime: 4.3s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 120 SDtfs, 158 SDslu, 77 SDs, 0 SdLazy, 142 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 154 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 7 MinimizatonAttempts, 34 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 97 NumberOfCodeBlocks, 97 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 142 ConstructedInterpolants, 0 QuantifiedInterpolants, 5805 SizeOfPredicates, 16 NumberOfNonLiveVariables, 334 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 6/6 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...