./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 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_e7ae7900-103c-4f69-aede-030f73d62dbf/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_e7ae7900-103c-4f69-aede-030f73d62dbf/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e7ae7900-103c-4f69-aede-030f73d62dbf/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e7ae7900-103c-4f69-aede-030f73d62dbf/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud-vcloud-master/worker/run_dir_e7ae7900-103c-4f69-aede-030f73d62dbf/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e7ae7900-103c-4f69-aede-030f73d62dbf/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 0.1.24-678e011 [2019-11-20 08:41:08,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 08:41:08,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 08:41:08,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 08:41:08,016 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 08:41:08,017 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 08:41:08,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 08:41:08,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 08:41:08,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 08:41:08,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 08:41:08,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 08:41:08,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 08:41:08,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 08:41:08,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 08:41:08,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 08:41:08,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 08:41:08,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 08:41:08,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 08:41:08,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 08:41:08,034 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 08:41:08,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 08:41:08,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 08:41:08,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 08:41:08,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 08:41:08,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 08:41:08,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 08:41:08,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 08:41:08,042 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 08:41:08,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 08:41:08,043 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 08:41:08,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 08:41:08,043 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 08:41:08,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 08:41:08,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 08:41:08,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 08:41:08,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 08:41:08,046 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 08:41:08,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 08:41:08,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 08:41:08,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 08:41:08,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 08:41:08,048 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e7ae7900-103c-4f69-aede-030f73d62dbf/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 08:41:08,060 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 08:41:08,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 08:41:08,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 08:41:08,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 08:41:08,062 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 08:41:08,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 08:41:08,062 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 08:41:08,062 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 08:41:08,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 08:41:08,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 08:41:08,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 08:41:08,063 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 08:41:08,063 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 08:41:08,064 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 08:41:08,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 08:41:08,064 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 08:41:08,064 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 08:41:08,064 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 08:41:08,064 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 08:41:08,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 08:41:08,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 08:41:08,065 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 08:41:08,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 08:41:08,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 08:41:08,066 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 08:41:08,066 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 08:41:08,066 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 08:41:08,066 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 08:41:08,066 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 08:41:08,066 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_e7ae7900-103c-4f69-aede-030f73d62dbf/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 [2019-11-20 08:41:08,197 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 08:41:08,207 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 08:41:08,210 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 08:41:08,211 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 08:41:08,212 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 08:41:08,212 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e7ae7900-103c-4f69-aede-030f73d62dbf/bin/uautomizer/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2019-11-20 08:41:08,264 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e7ae7900-103c-4f69-aede-030f73d62dbf/bin/uautomizer/data/d21d1a67e/cd259125f6ed4eeab700d8ea975ca57a/FLAGf9498294d [2019-11-20 08:41:08,712 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 08:41:08,713 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e7ae7900-103c-4f69-aede-030f73d62dbf/sv-benchmarks/c/list-properties/simple_built_from_end.i [2019-11-20 08:41:08,726 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e7ae7900-103c-4f69-aede-030f73d62dbf/bin/uautomizer/data/d21d1a67e/cd259125f6ed4eeab700d8ea975ca57a/FLAGf9498294d [2019-11-20 08:41:09,232 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e7ae7900-103c-4f69-aede-030f73d62dbf/bin/uautomizer/data/d21d1a67e/cd259125f6ed4eeab700d8ea975ca57a [2019-11-20 08:41:09,234 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 08:41:09,236 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 08:41:09,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 08:41:09,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 08:41:09,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 08:41:09,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:41:09" (1/1) ... [2019-11-20 08:41:09,244 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a2d9e38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:41:09, skipping insertion in model container [2019-11-20 08:41:09,244 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:41:09" (1/1) ... [2019-11-20 08:41:09,251 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 08:41:09,297 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 08:41:09,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 08:41:09,637 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 08:41:09,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 08:41:09,745 INFO L192 MainTranslator]: Completed translation [2019-11-20 08:41:09,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:41:09 WrapperNode [2019-11-20 08:41:09,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 08:41:09,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 08:41:09,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 08:41:09,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 08:41:09,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:41:09" (1/1) ... [2019-11-20 08:41:09,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:41:09" (1/1) ... [2019-11-20 08:41:09,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:41:09" (1/1) ... [2019-11-20 08:41:09,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:41:09" (1/1) ... [2019-11-20 08:41:09,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:41:09" (1/1) ... [2019-11-20 08:41:09,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:41:09" (1/1) ... [2019-11-20 08:41:09,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:41:09" (1/1) ... [2019-11-20 08:41:09,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 08:41:09,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 08:41:09,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 08:41:09,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 08:41:09,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:41:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e7ae7900-103c-4f69-aede-030f73d62dbf/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 08:41:09,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 08:41:09,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 08:41:09,865 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 08:41:09,865 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 08:41:09,865 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-20 08:41:09,865 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-20 08:41:09,865 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-20 08:41:09,866 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-20 08:41:09,866 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 08:41:09,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-20 08:41:09,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-20 08:41:09,867 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 08:41:09,867 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 08:41:09,868 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 08:41:09,868 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 08:41:09,868 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 08:41:09,869 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 08:41:09,869 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 08:41:09,869 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 08:41:09,869 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 08:41:09,870 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 08:41:09,870 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 08:41:09,870 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 08:41:09,870 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 08:41:09,871 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 08:41:09,872 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 08:41:09,872 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 08:41:09,873 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 08:41:09,874 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 08:41:09,874 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-20 08:41:09,874 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-20 08:41:09,874 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-20 08:41:09,874 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 08:41:09,874 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 08:41:09,875 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 08:41:09,875 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 08:41:09,875 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 08:41:09,875 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 08:41:09,875 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 08:41:09,875 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 08:41:09,875 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 08:41:09,876 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 08:41:09,876 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 08:41:09,876 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 08:41:09,877 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 08:41:09,877 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 08:41:09,877 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 08:41:09,877 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 08:41:09,878 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 08:41:09,878 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 08:41:09,878 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 08:41:09,878 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 08:41:09,878 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 08:41:09,878 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 08:41:09,878 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 08:41:09,879 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 08:41:09,879 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 08:41:09,879 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 08:41:09,879 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 08:41:09,879 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 08:41:09,879 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 08:41:09,880 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 08:41:09,880 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 08:41:09,880 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 08:41:09,880 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 08:41:09,880 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 08:41:09,880 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 08:41:09,881 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 08:41:09,881 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 08:41:09,881 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 08:41:09,881 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 08:41:09,882 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 08:41:09,882 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 08:41:09,882 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 08:41:09,883 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 08:41:09,883 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 08:41:09,883 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 08:41:09,883 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 08:41:09,884 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 08:41:09,884 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 08:41:09,884 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 08:41:09,884 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 08:41:09,884 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 08:41:09,884 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 08:41:09,884 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 08:41:09,884 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 08:41:09,884 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 08:41:09,884 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 08:41:09,884 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 08:41:09,884 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 08:41:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 08:41:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 08:41:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 08:41:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 08:41:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 08:41:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 08:41:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 08:41:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 08:41:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 08:41:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 08:41:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 08:41:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 08:41:09,886 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 08:41:09,886 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 08:41:09,886 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 08:41:09,886 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 08:41:09,886 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 08:41:09,886 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 08:41:09,886 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 08:41:09,886 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 08:41:09,886 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 08:41:09,886 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 08:41:09,886 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 08:41:09,886 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 08:41:09,887 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 08:41:09,887 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 08:41:09,887 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 08:41:09,887 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 08:41:09,888 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-20 08:41:09,888 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 08:41:09,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 08:41:09,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-20 08:41:09,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-20 08:41:09,888 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-20 08:41:09,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-20 08:41:09,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 08:41:09,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 08:41:09,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 08:41:10,211 INFO L689 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-20 08:41:10,366 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 08:41:10,366 INFO L285 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-20 08:41:10,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:41:10 BoogieIcfgContainer [2019-11-20 08:41:10,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 08:41:10,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 08:41:10,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 08:41:10,370 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 08:41:10,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:41:09" (1/3) ... [2019-11-20 08:41:10,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ef9e525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:41:10, skipping insertion in model container [2019-11-20 08:41:10,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:41:09" (2/3) ... [2019-11-20 08:41:10,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ef9e525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:41:10, skipping insertion in model container [2019-11-20 08:41:10,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:41:10" (3/3) ... [2019-11-20 08:41:10,373 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2019-11-20 08:41:10,380 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 08:41:10,385 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2019-11-20 08:41:10,393 INFO L249 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2019-11-20 08:41:10,408 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 08:41:10,409 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 08:41:10,409 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 08:41:10,409 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 08:41:10,409 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 08:41:10,409 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 08:41:10,409 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 08:41:10,409 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 08:41:10,422 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-11-20 08:41:10,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 08:41:10,431 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:41:10,431 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:41:10,432 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 08:41:10,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:41:10,436 INFO L82 PathProgramCache]: Analyzing trace with hash 131073592, now seen corresponding path program 1 times [2019-11-20 08:41:10,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:41:10,443 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [463537918] [2019-11-20 08:41:10,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e7ae7900-103c-4f69-aede-030f73d62dbf/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 08:41:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:41:10,647 INFO L255 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-20 08:41:10,653 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:41:10,672 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 08:41:10,672 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:41:10,694 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 08:41:10,695 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [463537918] [2019-11-20 08:41:10,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:41:10,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 08:41:10,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274796584] [2019-11-20 08:41:10,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-20 08:41:10,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:41:10,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-20 08:41:10,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 08:41:10,718 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2019-11-20 08:41:10,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:41:10,736 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-11-20 08:41:10,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 08:41:10,737 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-20 08:41:10,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:41:10,744 INFO L225 Difference]: With dead ends: 33 [2019-11-20 08:41:10,744 INFO L226 Difference]: Without dead ends: 26 [2019-11-20 08:41:10,746 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 08:41:10,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-20 08:41:10,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-20 08:41:10,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-20 08:41:10,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-20 08:41:10,773 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 9 [2019-11-20 08:41:10,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:41:10,773 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-20 08:41:10,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-20 08:41:10,773 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-20 08:41:10,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 08:41:10,774 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:41:10,774 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:41:10,975 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:41:10,975 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 08:41:10,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:41:10,975 INFO L82 PathProgramCache]: Analyzing trace with hash 131073003, now seen corresponding path program 1 times [2019-11-20 08:41:10,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:41:10,976 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [55885821] [2019-11-20 08:41:10,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e7ae7900-103c-4f69-aede-030f73d62dbf/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 08:41:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:41:11,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 08:41:11,127 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:41:11,137 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 08:41:11,138 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:41:11,145 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 08:41:11,145 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [55885821] [2019-11-20 08:41:11,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:41:11,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 08:41:11,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271011266] [2019-11-20 08:41:11,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 08:41:11,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:41:11,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 08:41:11,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 08:41:11,149 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 3 states. [2019-11-20 08:41:11,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:41:11,230 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2019-11-20 08:41:11,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 08:41:11,231 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-20 08:41:11,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:41:11,232 INFO L225 Difference]: With dead ends: 37 [2019-11-20 08:41:11,232 INFO L226 Difference]: Without dead ends: 36 [2019-11-20 08:41:11,233 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 08:41:11,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-20 08:41:11,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2019-11-20 08:41:11,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-20 08:41:11,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-11-20 08:41:11,242 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 9 [2019-11-20 08:41:11,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:41:11,242 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-11-20 08:41:11,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 08:41:11,242 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-11-20 08:41:11,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 08:41:11,243 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:41:11,244 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:41:11,444 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:41:11,444 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 08:41:11,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:41:11,445 INFO L82 PathProgramCache]: Analyzing trace with hash 131073047, now seen corresponding path program 1 times [2019-11-20 08:41:11,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:41:11,445 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1701126107] [2019-11-20 08:41:11,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e7ae7900-103c-4f69-aede-030f73d62dbf/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 08:41:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:41:11,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 08:41:11,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:41:11,641 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 08:41:11,642 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:41:11,652 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 08:41:11,653 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1701126107] [2019-11-20 08:41:11,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:41:11,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-20 08:41:11,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812880266] [2019-11-20 08:41:11,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 08:41:11,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:41:11,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 08:41:11,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 08:41:11,654 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 3 states. [2019-11-20 08:41:11,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:41:11,715 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-20 08:41:11,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 08:41:11,716 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-20 08:41:11,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:41:11,717 INFO L225 Difference]: With dead ends: 36 [2019-11-20 08:41:11,717 INFO L226 Difference]: Without dead ends: 35 [2019-11-20 08:41:11,717 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 08:41:11,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-20 08:41:11,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2019-11-20 08:41:11,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-20 08:41:11,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-11-20 08:41:11,722 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 9 [2019-11-20 08:41:11,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:41:11,722 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-11-20 08:41:11,722 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 08:41:11,722 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-11-20 08:41:11,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 08:41:11,723 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:41:11,723 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:41:11,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:41:11,925 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 08:41:11,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:41:11,926 INFO L82 PathProgramCache]: Analyzing trace with hash 131074363, now seen corresponding path program 1 times [2019-11-20 08:41:11,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:41:11,927 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [135939896] [2019-11-20 08:41:11,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e7ae7900-103c-4f69-aede-030f73d62dbf/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 08:41:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:41:12,089 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 08:41:12,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:41:12,134 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 [2019-11-20 08:41:12,135 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:41:12,146 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:41:12,147 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:41:12,147 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 08:41:12,162 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 08:41:12,162 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:41:12,201 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 08:41:12,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [135939896] [2019-11-20 08:41:12,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:41:12,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-20 08:41:12,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224481567] [2019-11-20 08:41:12,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 08:41:12,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:41:12,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 08:41:12,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 08:41:12,203 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 4 states. [2019-11-20 08:41:12,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:41:12,282 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2019-11-20 08:41:12,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 08:41:12,283 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-20 08:41:12,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:41:12,284 INFO L225 Difference]: With dead ends: 25 [2019-11-20 08:41:12,284 INFO L226 Difference]: Without dead ends: 25 [2019-11-20 08:41:12,284 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 [2019-11-20 08:41:12,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-20 08:41:12,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-20 08:41:12,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-20 08:41:12,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-11-20 08:41:12,288 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 9 [2019-11-20 08:41:12,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:41:12,288 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-11-20 08:41:12,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 08:41:12,288 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-11-20 08:41:12,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 08:41:12,289 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:41:12,289 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:41:12,489 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:41:12,490 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 08:41:12,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:41:12,490 INFO L82 PathProgramCache]: Analyzing trace with hash 131074362, now seen corresponding path program 1 times [2019-11-20 08:41:12,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:41:12,491 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1685538975] [2019-11-20 08:41:12,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e7ae7900-103c-4f69-aede-030f73d62dbf/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 08:41:12,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:41:12,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 08:41:12,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:41:12,673 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 [2019-11-20 08:41:12,674 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:41:12,676 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:41:12,677 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:41:12,677 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 08:41:12,682 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 08:41:12,683 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:41:12,689 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 08:41:12,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1685538975] [2019-11-20 08:41:12,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:41:12,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 08:41:12,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031584234] [2019-11-20 08:41:12,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 08:41:12,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:41:12,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 08:41:12,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 08:41:12,691 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 3 states. [2019-11-20 08:41:12,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:41:12,754 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2019-11-20 08:41:12,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 08:41:12,755 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-20 08:41:12,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:41:12,755 INFO L225 Difference]: With dead ends: 23 [2019-11-20 08:41:12,755 INFO L226 Difference]: Without dead ends: 23 [2019-11-20 08:41:12,756 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 08:41:12,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-20 08:41:12,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-20 08:41:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-20 08:41:12,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-20 08:41:12,759 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 9 [2019-11-20 08:41:12,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:41:12,760 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-20 08:41:12,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 08:41:12,760 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-20 08:41:12,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 08:41:12,761 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:41:12,761 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:41:12,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:41:12,967 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 08:41:12,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:41:12,967 INFO L82 PathProgramCache]: Analyzing trace with hash 418613294, now seen corresponding path program 1 times [2019-11-20 08:41:12,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:41:12,968 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [261414370] [2019-11-20 08:41:12,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e7ae7900-103c-4f69-aede-030f73d62dbf/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 [2019-11-20 08:41:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:41:13,128 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 08:41:13,129 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:41:13,144 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 08:41:13,144 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:41:13,150 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 08:41:13,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [261414370] [2019-11-20 08:41:13,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:41:13,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-20 08:41:13,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640144428] [2019-11-20 08:41:13,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 08:41:13,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:41:13,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 08:41:13,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 08:41:13,152 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 4 states. [2019-11-20 08:41:13,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:41:13,257 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-20 08:41:13,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 08:41:13,258 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-20 08:41:13,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:41:13,259 INFO L225 Difference]: With dead ends: 36 [2019-11-20 08:41:13,259 INFO L226 Difference]: Without dead ends: 36 [2019-11-20 08:41:13,259 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 [2019-11-20 08:41:13,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-20 08:41:13,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2019-11-20 08:41:13,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-20 08:41:13,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-11-20 08:41:13,267 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 14 [2019-11-20 08:41:13,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:41:13,269 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-11-20 08:41:13,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 08:41:13,269 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-11-20 08:41:13,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 08:41:13,270 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:41:13,270 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:41:13,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:41:13,474 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 08:41:13,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:41:13,474 INFO L82 PathProgramCache]: Analyzing trace with hash 418613338, now seen corresponding path program 1 times [2019-11-20 08:41:13,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:41:13,475 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [855580603] [2019-11-20 08:41:13,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e7ae7900-103c-4f69-aede-030f73d62dbf/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 [2019-11-20 08:41:13,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:41:13,641 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 08:41:13,643 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:41:13,654 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 [2019-11-20 08:41:13,654 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:41:13,656 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:41:13,657 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:41:13,657 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 08:41:13,670 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 08:41:13,670 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:41:13,675 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 08:41:13,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [855580603] [2019-11-20 08:41:13,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:41:13,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-20 08:41:13,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705485443] [2019-11-20 08:41:13,676 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 08:41:13,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:41:13,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 08:41:13,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 08:41:13,677 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 4 states. [2019-11-20 08:41:13,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:41:13,789 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2019-11-20 08:41:13,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 08:41:13,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-20 08:41:13,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:41:13,790 INFO L225 Difference]: With dead ends: 29 [2019-11-20 08:41:13,790 INFO L226 Difference]: Without dead ends: 29 [2019-11-20 08:41:13,791 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 [2019-11-20 08:41:13,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-20 08:41:13,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2019-11-20 08:41:13,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-20 08:41:13,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-20 08:41:13,794 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2019-11-20 08:41:13,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:41:13,794 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-20 08:41:13,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 08:41:13,794 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-20 08:41:13,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 08:41:13,795 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:41:13,795 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:41:13,997 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:41:13,997 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 08:41:13,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:41:13,998 INFO L82 PathProgramCache]: Analyzing trace with hash 418613339, now seen corresponding path program 1 times [2019-11-20 08:41:13,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:41:13,998 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2145312887] [2019-11-20 08:41:13,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e7ae7900-103c-4f69-aede-030f73d62dbf/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 [2019-11-20 08:41:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:41:14,150 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 08:41:14,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:41:14,161 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 [2019-11-20 08:41:14,161 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:41:14,166 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:41:14,166 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:41:14,167 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 08:41:14,185 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 08:41:14,185 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:41:14,272 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 08:41:14,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2145312887] [2019-11-20 08:41:14,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:41:14,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-20 08:41:14,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589025743] [2019-11-20 08:41:14,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 08:41:14,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:41:14,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 08:41:14,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 08:41:14,274 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2019-11-20 08:41:14,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:41:14,449 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2019-11-20 08:41:14,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 08:41:14,449 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-20 08:41:14,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:41:14,450 INFO L225 Difference]: With dead ends: 31 [2019-11-20 08:41:14,450 INFO L226 Difference]: Without dead ends: 31 [2019-11-20 08:41:14,450 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 [2019-11-20 08:41:14,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-20 08:41:14,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2019-11-20 08:41:14,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-20 08:41:14,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-20 08:41:14,453 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 14 [2019-11-20 08:41:14,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:41:14,453 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-20 08:41:14,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 08:41:14,453 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-20 08:41:14,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 08:41:14,454 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:41:14,454 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:41:14,654 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:41:14,655 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 08:41:14,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:41:14,655 INFO L82 PathProgramCache]: Analyzing trace with hash 891274073, now seen corresponding path program 1 times [2019-11-20 08:41:14,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:41:14,656 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [827565866] [2019-11-20 08:41:14,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e7ae7900-103c-4f69-aede-030f73d62dbf/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:41:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 08:41:14,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 08:41:14,928 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-20 08:41:14,928 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 08:41:15,129 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:41:15,137 WARN L417 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2019-11-20 08:41:15,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 08:41:15 BoogieIcfgContainer [2019-11-20 08:41:15,149 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 08:41:15,149 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 08:41:15,149 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 08:41:15,150 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 08:41:15,150 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:41:10" (3/4) ... [2019-11-20 08:41:15,154 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-20 08:41:15,155 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 08:41:15,156 INFO L168 Benchmark]: Toolchain (without parser) took 5920.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 944.7 MB in the beginning and 984.7 MB in the end (delta: -40.0 MB). Peak memory consumption was 98.4 MB. Max. memory is 11.5 GB. [2019-11-20 08:41:15,157 INFO L168 Benchmark]: CDTParser took 0.24 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 08:41:15,157 INFO L168 Benchmark]: CACSL2BoogieTranslator took 508.99 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -170.9 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-11-20 08:41:15,158 INFO L168 Benchmark]: Boogie Preprocessor took 52.87 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-20 08:41:15,158 INFO L168 Benchmark]: RCFGBuilder took 567.32 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: 43.9 MB). Peak memory consumption was 43.9 MB. Max. memory is 11.5 GB. [2019-11-20 08:41:15,159 INFO L168 Benchmark]: TraceAbstraction took 4781.67 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 984.7 MB in the end (delta: 81.6 MB). Peak memory consumption was 81.6 MB. Max. memory is 11.5 GB. [2019-11-20 08:41:15,159 INFO L168 Benchmark]: Witness Printer took 5.56 ms. Allocated memory is still 1.2 GB. Free memory is still 984.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 08:41:15,161 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 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 508.99 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -170.9 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 52.87 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 567.32 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: 43.9 MB). Peak memory consumption was 43.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4781.67 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 984.7 MB in the end (delta: 81.6 MB). Peak memory consumption was 81.6 MB. Max. memory is 11.5 GB. * Witness Printer took 5.56 ms. Allocated memory is still 1.2 GB. Free memory is still 984.7 MB. 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 9 procedures, 49 locations, 9 error locations. Result: UNSAFE, OverallTime: 4.7s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 148 SDtfs, 150 SDslu, 80 SDs, 0 SdLazy, 150 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 171 GetRequests, 154 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, 8 MinimizatonAttempts, 34 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 106 NumberOfCodeBlocks, 106 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 158 ConstructedInterpolants, 0 QuantifiedInterpolants, 6011 SizeOfPredicates, 16 NumberOfNonLiveVariables, 344 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 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...