./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/list-1.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_5eab5a70-74fc-49c8-b2a9-7a9d25235ff0/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_5eab5a70-74fc-49c8-b2a9-7a9d25235ff0/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5eab5a70-74fc-49c8-b2a9-7a9d25235ff0/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5eab5a70-74fc-49c8-b2a9-7a9d25235ff0/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/list-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_5eab5a70-74fc-49c8-b2a9-7a9d25235ff0/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5eab5a70-74fc-49c8-b2a9-7a9d25235ff0/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 283704c20cde057c38dc133107a27c4d033fb1ba ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2019-11-19 23:50:18,718 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 23:50:18,720 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 23:50:18,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 23:50:18,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 23:50:18,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 23:50:18,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 23:50:18,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 23:50:18,759 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 23:50:18,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 23:50:18,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 23:50:18,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 23:50:18,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 23:50:18,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 23:50:18,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 23:50:18,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 23:50:18,773 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 23:50:18,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 23:50:18,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 23:50:18,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 23:50:18,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 23:50:18,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 23:50:18,794 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 23:50:18,796 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 23:50:18,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 23:50:18,799 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 23:50:18,800 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 23:50:18,801 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 23:50:18,802 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 23:50:18,804 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 23:50:18,804 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 23:50:18,805 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 23:50:18,806 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 23:50:18,807 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 23:50:18,808 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 23:50:18,808 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 23:50:18,809 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 23:50:18,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 23:50:18,810 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 23:50:18,811 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 23:50:18,812 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 23:50:18,813 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5eab5a70-74fc-49c8-b2a9-7a9d25235ff0/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-19 23:50:18,845 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 23:50:18,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 23:50:18,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 23:50:18,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 23:50:18,861 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 23:50:18,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 23:50:18,862 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 23:50:18,862 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-19 23:50:18,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 23:50:18,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 23:50:18,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 23:50:18,864 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-19 23:50:18,864 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-19 23:50:18,864 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-19 23:50:18,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 23:50:18,865 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-19 23:50:18,865 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-19 23:50:18,865 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 23:50:18,865 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 23:50:18,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 23:50:18,866 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 23:50:18,866 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 23:50:18,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 23:50:18,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 23:50:18,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 23:50:18,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 23:50:18,868 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-19 23:50:18,868 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-19 23:50:18,868 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-19 23:50:18,869 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_5eab5a70-74fc-49c8-b2a9-7a9d25235ff0/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 -> 283704c20cde057c38dc133107a27c4d033fb1ba [2019-11-19 23:50:19,071 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 23:50:19,084 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 23:50:19,088 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 23:50:19,090 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 23:50:19,090 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 23:50:19,091 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5eab5a70-74fc-49c8-b2a9-7a9d25235ff0/bin/uautomizer/../../sv-benchmarks/c/list-properties/list-1.i [2019-11-19 23:50:19,166 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5eab5a70-74fc-49c8-b2a9-7a9d25235ff0/bin/uautomizer/data/e196cce25/40ba887e542d41df9a3d166b153c41c7/FLAG463f13670 [2019-11-19 23:50:19,698 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 23:50:19,699 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5eab5a70-74fc-49c8-b2a9-7a9d25235ff0/sv-benchmarks/c/list-properties/list-1.i [2019-11-19 23:50:19,713 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5eab5a70-74fc-49c8-b2a9-7a9d25235ff0/bin/uautomizer/data/e196cce25/40ba887e542d41df9a3d166b153c41c7/FLAG463f13670 [2019-11-19 23:50:19,995 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5eab5a70-74fc-49c8-b2a9-7a9d25235ff0/bin/uautomizer/data/e196cce25/40ba887e542d41df9a3d166b153c41c7 [2019-11-19 23:50:19,998 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 23:50:19,999 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-19 23:50:20,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 23:50:20,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 23:50:20,005 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 23:50:20,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 11:50:19" (1/1) ... [2019-11-19 23:50:20,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7594f213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:50:20, skipping insertion in model container [2019-11-19 23:50:20,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 11:50:19" (1/1) ... [2019-11-19 23:50:20,017 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 23:50:20,063 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 23:50:20,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 23:50:20,506 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 23:50:20,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 23:50:20,675 INFO L192 MainTranslator]: Completed translation [2019-11-19 23:50:20,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:50:20 WrapperNode [2019-11-19 23:50:20,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 23:50:20,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 23:50:20,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 23:50:20,677 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 23:50:20,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:50:20" (1/1) ... [2019-11-19 23:50:20,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:50:20" (1/1) ... [2019-11-19 23:50:20,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:50:20" (1/1) ... [2019-11-19 23:50:20,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:50:20" (1/1) ... [2019-11-19 23:50:20,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:50:20" (1/1) ... [2019-11-19 23:50:20,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:50:20" (1/1) ... [2019-11-19 23:50:20,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:50:20" (1/1) ... [2019-11-19 23:50:20,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 23:50:20,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 23:50:20,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 23:50:20,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 23:50:20,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:50:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5eab5a70-74fc-49c8-b2a9-7a9d25235ff0/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 [2019-11-19 23:50:20,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-19 23:50:20,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 23:50:20,871 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-19 23:50:20,872 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-19 23:50:20,873 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-19 23:50:20,873 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-19 23:50:20,873 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-19 23:50:20,874 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-19 23:50:20,874 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-19 23:50:20,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-19 23:50:20,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-19 23:50:20,875 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-19 23:50:20,875 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-19 23:50:20,875 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-19 23:50:20,875 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-19 23:50:20,876 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-19 23:50:20,876 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-19 23:50:20,876 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-19 23:50:20,876 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-19 23:50:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-19 23:50:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-19 23:50:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-19 23:50:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-19 23:50:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-19 23:50:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-19 23:50:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-19 23:50:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-19 23:50:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-19 23:50:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-19 23:50:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-19 23:50:20,881 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-19 23:50:20,881 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-19 23:50:20,881 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-19 23:50:20,882 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-19 23:50:20,882 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-19 23:50:20,882 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-19 23:50:20,882 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-19 23:50:20,882 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-19 23:50:20,882 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-19 23:50:20,883 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-19 23:50:20,883 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-19 23:50:20,883 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-19 23:50:20,883 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-19 23:50:20,883 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-19 23:50:20,883 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-19 23:50:20,884 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-19 23:50:20,884 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-19 23:50:20,884 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-19 23:50:20,884 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-19 23:50:20,884 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-19 23:50:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-19 23:50:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-19 23:50:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-19 23:50:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-19 23:50:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-19 23:50:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-19 23:50:20,886 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-19 23:50:20,886 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-19 23:50:20,886 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-19 23:50:20,886 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-19 23:50:20,887 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-19 23:50:20,887 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-19 23:50:20,887 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-19 23:50:20,888 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-19 23:50:20,888 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-19 23:50:20,889 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-19 23:50:20,889 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-19 23:50:20,890 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-19 23:50:20,890 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-19 23:50:20,890 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-19 23:50:20,890 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-19 23:50:20,891 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-19 23:50:20,892 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-19 23:50:20,892 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-19 23:50:20,893 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-19 23:50:20,894 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-19 23:50:20,894 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-19 23:50:20,894 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-19 23:50:20,894 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-19 23:50:20,894 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-19 23:50:20,895 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-19 23:50:20,895 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-19 23:50:20,895 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-19 23:50:20,895 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-19 23:50:20,895 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-19 23:50:20,895 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-19 23:50:20,896 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-19 23:50:20,897 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-19 23:50:20,897 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-19 23:50:20,897 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-19 23:50:20,897 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-19 23:50:20,897 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-19 23:50:20,898 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-19 23:50:20,898 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-19 23:50:20,898 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-19 23:50:20,898 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-19 23:50:20,898 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-19 23:50:20,898 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-19 23:50:20,899 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-19 23:50:20,899 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-19 23:50:20,899 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-19 23:50:20,899 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-19 23:50:20,899 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-19 23:50:20,899 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-19 23:50:20,900 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-19 23:50:20,900 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-19 23:50:20,900 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-19 23:50:20,900 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-19 23:50:20,900 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-19 23:50:20,901 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-19 23:50:20,901 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-19 23:50:20,901 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-19 23:50:20,901 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-19 23:50:20,901 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-19 23:50:20,901 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-19 23:50:20,902 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-19 23:50:20,902 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-19 23:50:20,903 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-19 23:50:20,903 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-19 23:50:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-19 23:50:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-19 23:50:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-19 23:50:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-19 23:50:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-19 23:50:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-19 23:50:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-19 23:50:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 23:50:20,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-19 23:50:21,335 INFO L689 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-19 23:50:21,888 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 23:50:21,888 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-19 23:50:21,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:50:21 BoogieIcfgContainer [2019-11-19 23:50:21,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 23:50:21,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 23:50:21,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 23:50:21,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 23:50:21,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 11:50:19" (1/3) ... [2019-11-19 23:50:21,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e7a249e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 11:50:21, skipping insertion in model container [2019-11-19 23:50:21,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:50:20" (2/3) ... [2019-11-19 23:50:21,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e7a249e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 11:50:21, skipping insertion in model container [2019-11-19 23:50:21,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:50:21" (3/3) ... [2019-11-19 23:50:21,899 INFO L109 eAbstractionObserver]: Analyzing ICFG list-1.i [2019-11-19 23:50:21,916 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 23:50:21,938 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 25 error locations. [2019-11-19 23:50:21,953 INFO L249 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2019-11-19 23:50:21,975 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 23:50:21,976 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-19 23:50:21,976 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 23:50:21,976 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 23:50:21,976 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 23:50:21,976 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 23:50:21,976 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 23:50:21,977 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 23:50:21,999 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2019-11-19 23:50:22,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-19 23:50:22,013 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:50:22,013 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:50:22,014 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-19 23:50:22,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:50:22,019 INFO L82 PathProgramCache]: Analyzing trace with hash 41225819, now seen corresponding path program 1 times [2019-11-19 23:50:22,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:50:22,033 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1197316964] [2019-11-19 23:50:22,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5eab5a70-74fc-49c8-b2a9-7a9d25235ff0/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:50:22,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:50:22,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 23:50:22,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:50:22,403 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-19 23:50:22,404 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:50:22,414 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:50:22,415 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:50:22,415 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-19 23:50:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:50:22,446 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:50:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:50:22,466 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1197316964] [2019-11-19 23:50:22,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:50:22,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-19 23:50:22,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108998287] [2019-11-19 23:50:22,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 23:50:22,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:50:22,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 23:50:22,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-19 23:50:22,495 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 4 states. [2019-11-19 23:50:22,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:50:22,993 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2019-11-19 23:50:22,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 23:50:22,996 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-19 23:50:22,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:50:23,006 INFO L225 Difference]: With dead ends: 75 [2019-11-19 23:50:23,006 INFO L226 Difference]: Without dead ends: 66 [2019-11-19 23:50:23,008 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-19 23:50:23,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-19 23:50:23,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2019-11-19 23:50:23,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-19 23:50:23,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2019-11-19 23:50:23,053 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 10 [2019-11-19 23:50:23,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:50:23,054 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2019-11-19 23:50:23,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 23:50:23,054 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2019-11-19 23:50:23,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-19 23:50:23,055 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:50:23,055 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:50:23,259 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:50:23,260 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-19 23:50:23,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:50:23,260 INFO L82 PathProgramCache]: Analyzing trace with hash 41225820, now seen corresponding path program 1 times [2019-11-19 23:50:23,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:50:23,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [515956041] [2019-11-19 23:50:23,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5eab5a70-74fc-49c8-b2a9-7a9d25235ff0/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:50:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:50:23,489 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 23:50:23,491 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:50:23,503 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-19 23:50:23,504 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:50:23,512 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:50:23,513 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:50:23,513 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-19 23:50:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:50:23,548 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:50:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:50:23,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [515956041] [2019-11-19 23:50:23,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:50:23,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-19 23:50:23,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861202283] [2019-11-19 23:50:23,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 23:50:23,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:50:23,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 23:50:23,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-19 23:50:23,682 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 6 states. [2019-11-19 23:50:24,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:50:24,309 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2019-11-19 23:50:24,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 23:50:24,312 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-19 23:50:24,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:50:24,314 INFO L225 Difference]: With dead ends: 83 [2019-11-19 23:50:24,314 INFO L226 Difference]: Without dead ends: 83 [2019-11-19 23:50:24,315 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-19 23:50:24,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-19 23:50:24,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2019-11-19 23:50:24,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-19 23:50:24,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2019-11-19 23:50:24,339 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 10 [2019-11-19 23:50:24,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:50:24,340 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2019-11-19 23:50:24,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 23:50:24,341 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2019-11-19 23:50:24,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-19 23:50:24,344 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:50:24,344 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:50:24,555 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:50:24,555 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-19 23:50:24,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:50:24,556 INFO L82 PathProgramCache]: Analyzing trace with hash -886979369, now seen corresponding path program 1 times [2019-11-19 23:50:24,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:50:24,557 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [892203548] [2019-11-19 23:50:24,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5eab5a70-74fc-49c8-b2a9-7a9d25235ff0/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:50:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:50:24,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-19 23:50:24,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:50:24,854 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2019-11-19 23:50:24,855 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:50:24,865 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:50:24,866 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:50:24,866 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-19 23:50:24,922 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2019-11-19 23:50:24,923 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:50:24,926 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:50:24,926 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:50:24,927 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:5 [2019-11-19 23:50:24,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:50:24,951 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:50:25,020 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-11-19 23:50:25,020 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-19 23:50:25,034 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:50:25,035 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-19 23:50:25,035 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:7 [2019-11-19 23:50:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:50:25,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [892203548] [2019-11-19 23:50:25,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:50:25,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2019-11-19 23:50:25,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888296300] [2019-11-19 23:50:25,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-19 23:50:25,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:50:25,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-19 23:50:25,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-19 23:50:25,086 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand 11 states. [2019-11-19 23:50:26,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:50:26,284 INFO L93 Difference]: Finished difference Result 141 states and 148 transitions. [2019-11-19 23:50:26,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-19 23:50:26,286 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2019-11-19 23:50:26,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:50:26,288 INFO L225 Difference]: With dead ends: 141 [2019-11-19 23:50:26,288 INFO L226 Difference]: Without dead ends: 141 [2019-11-19 23:50:26,290 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-11-19 23:50:26,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-11-19 23:50:26,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 79. [2019-11-19 23:50:26,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-19 23:50:26,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2019-11-19 23:50:26,313 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 17 [2019-11-19 23:50:26,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:50:26,314 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2019-11-19 23:50:26,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-19 23:50:26,314 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2019-11-19 23:50:26,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-19 23:50:26,316 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:50:26,316 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:50:26,520 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:50:26,525 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-19 23:50:26,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:50:26,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1656993711, now seen corresponding path program 1 times [2019-11-19 23:50:26,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:50:26,527 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [13739225] [2019-11-19 23:50:26,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5eab5a70-74fc-49c8-b2a9-7a9d25235ff0/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:50:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:50:26,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 23:50:26,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:50:26,762 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:50:26,763 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2019-11-19 23:50:26,764 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:50:26,790 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-19 23:50:26,790 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:50:26,790 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2019-11-19 23:50:26,813 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2019-11-19 23:50:26,813 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:50:26,829 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:50:26,830 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:50:26,830 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:17 [2019-11-19 23:50:26,866 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2019-11-19 23:50:26,867 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:50:26,875 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:50:26,876 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:50:26,876 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:11 [2019-11-19 23:50:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:50:26,911 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:50:26,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:50:26,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [13739225] [2019-11-19 23:50:26,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:50:26,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-19 23:50:26,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001507599] [2019-11-19 23:50:26,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-19 23:50:26,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:50:26,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-19 23:50:26,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-19 23:50:26,986 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 8 states. [2019-11-19 23:50:27,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:50:27,949 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2019-11-19 23:50:27,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 23:50:27,950 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-11-19 23:50:27,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:50:27,952 INFO L225 Difference]: With dead ends: 101 [2019-11-19 23:50:27,952 INFO L226 Difference]: Without dead ends: 101 [2019-11-19 23:50:27,952 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-19 23:50:27,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-19 23:50:27,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 81. [2019-11-19 23:50:27,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-19 23:50:27,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2019-11-19 23:50:27,961 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 17 [2019-11-19 23:50:27,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:50:27,962 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2019-11-19 23:50:27,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-19 23:50:27,962 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2019-11-19 23:50:27,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-19 23:50:27,963 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:50:27,963 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:50:28,174 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:50:28,175 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-19 23:50:28,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:50:28,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1656993712, now seen corresponding path program 1 times [2019-11-19 23:50:28,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:50:28,184 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [480535774] [2019-11-19 23:50:28,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5eab5a70-74fc-49c8-b2a9-7a9d25235ff0/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 [2019-11-19 23:50:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:50:28,416 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-19 23:50:28,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:50:28,430 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-19 23:50:28,430 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:50:28,436 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:50:28,437 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:50:28,437 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-19 23:50:28,463 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2019-11-19 23:50:28,464 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:50:28,494 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:50:28,506 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2019-11-19 23:50:28,507 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:50:28,528 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:50:28,529 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:50:28,529 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:23 [2019-11-19 23:50:28,584 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2019-11-19 23:50:28,584 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:50:28,602 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:50:28,608 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2019-11-19 23:50:28,608 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:50:28,616 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:50:28,617 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:50:28,617 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:11 [2019-11-19 23:50:28,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:50:28,654 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:50:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:50:28,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [480535774] [2019-11-19 23:50:28,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:50:28,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-19 23:50:28,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681758833] [2019-11-19 23:50:28,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-19 23:50:28,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:50:28,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-19 23:50:28,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-19 23:50:28,914 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 10 states. [2019-11-19 23:50:30,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:50:30,314 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2019-11-19 23:50:30,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-19 23:50:30,315 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-11-19 23:50:30,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:50:30,317 INFO L225 Difference]: With dead ends: 103 [2019-11-19 23:50:30,317 INFO L226 Difference]: Without dead ends: 103 [2019-11-19 23:50:30,317 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-11-19 23:50:30,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-19 23:50:30,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 77. [2019-11-19 23:50:30,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-19 23:50:30,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2019-11-19 23:50:30,326 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 17 [2019-11-19 23:50:30,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:50:30,327 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2019-11-19 23:50:30,328 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-19 23:50:30,328 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2019-11-19 23:50:30,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-19 23:50:30,329 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:50:30,329 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:50:30,532 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:50:30,532 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-19 23:50:30,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:50:30,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1044897063, now seen corresponding path program 1 times [2019-11-19 23:50:30,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:50:30,533 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [291727116] [2019-11-19 23:50:30,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5eab5a70-74fc-49c8-b2a9-7a9d25235ff0/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 [2019-11-19 23:50:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:50:30,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 23:50:30,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:50:30,744 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:50:30,745 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2019-11-19 23:50:30,745 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:50:30,762 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-19 23:50:30,763 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:50:30,763 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2019-11-19 23:50:30,781 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2019-11-19 23:50:30,782 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:50:30,793 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:50:30,794 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:50:30,795 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:17 [2019-11-19 23:50:30,822 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2019-11-19 23:50:30,822 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:50:30,851 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:50:30,852 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:50:30,852 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:13 [2019-11-19 23:50:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:50:30,868 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:50:30,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:50:30,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [291727116] [2019-11-19 23:50:30,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:50:30,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-19 23:50:30,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597051642] [2019-11-19 23:50:30,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-19 23:50:30,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:50:30,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-19 23:50:30,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-19 23:50:30,900 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 8 states. [2019-11-19 23:50:31,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:50:31,459 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2019-11-19 23:50:31,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 23:50:31,460 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-19 23:50:31,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:50:31,461 INFO L225 Difference]: With dead ends: 95 [2019-11-19 23:50:31,461 INFO L226 Difference]: Without dead ends: 95 [2019-11-19 23:50:31,461 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-19 23:50:31,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-19 23:50:31,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2019-11-19 23:50:31,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-19 23:50:31,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2019-11-19 23:50:31,475 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 18 [2019-11-19 23:50:31,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:50:31,475 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2019-11-19 23:50:31,476 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-19 23:50:31,476 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2019-11-19 23:50:31,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-19 23:50:31,477 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:50:31,477 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:50:31,680 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:50:31,680 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-19 23:50:31,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:50:31,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1044897062, now seen corresponding path program 1 times [2019-11-19 23:50:31,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:50:31,682 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [240860087] [2019-11-19 23:50:31,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5eab5a70-74fc-49c8-b2a9-7a9d25235ff0/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 [2019-11-19 23:50:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:50:31,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-19 23:50:31,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:50:31,905 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-19 23:50:31,905 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:50:31,914 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:50:31,914 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:50:31,914 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-19 23:50:31,948 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2019-11-19 23:50:31,948 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:50:31,969 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:50:31,981 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2019-11-19 23:50:31,981 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:50:32,005 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:50:32,006 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:50:32,007 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:23 [2019-11-19 23:50:32,045 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2019-11-19 23:50:32,046 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:50:32,066 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:50:32,069 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2019-11-19 23:50:32,070 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:50:32,076 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:50:32,076 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:50:32,077 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:9 [2019-11-19 23:50:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:50:32,107 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:50:32,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:50:32,367 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [240860087] [2019-11-19 23:50:32,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:50:32,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-19 23:50:32,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287132274] [2019-11-19 23:50:32,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-19 23:50:32,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:50:32,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-19 23:50:32,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-19 23:50:32,369 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 10 states. [2019-11-19 23:50:33,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:50:33,675 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2019-11-19 23:50:33,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-19 23:50:33,676 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-11-19 23:50:33,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:50:33,677 INFO L225 Difference]: With dead ends: 93 [2019-11-19 23:50:33,677 INFO L226 Difference]: Without dead ends: 93 [2019-11-19 23:50:33,678 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-11-19 23:50:33,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-19 23:50:33,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2019-11-19 23:50:33,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-19 23:50:33,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2019-11-19 23:50:33,683 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 18 [2019-11-19 23:50:33,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:50:33,683 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2019-11-19 23:50:33,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-19 23:50:33,684 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2019-11-19 23:50:33,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-19 23:50:33,685 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:50:33,685 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:50:33,888 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:50:33,889 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-19 23:50:33,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:50:33,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2031227228, now seen corresponding path program 1 times [2019-11-19 23:50:33,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:50:33,890 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [880690935] [2019-11-19 23:50:33,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5eab5a70-74fc-49c8-b2a9-7a9d25235ff0/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 [2019-11-19 23:50:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:50:34,089 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-19 23:50:34,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:50:34,129 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2019-11-19 23:50:34,130 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:50:34,137 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:50:34,138 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:50:34,138 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-19 23:50:34,182 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2019-11-19 23:50:34,183 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:50:34,186 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:50:34,186 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:50:34,187 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:3 [2019-11-19 23:50:34,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:50:34,211 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:50:34,292 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-11-19 23:50:34,293 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-19 23:50:34,302 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:50:34,302 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-19 23:50:34,302 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:7 [2019-11-19 23:50:34,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:50:34,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [880690935] [2019-11-19 23:50:34,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:50:34,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2019-11-19 23:50:34,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253316145] [2019-11-19 23:50:34,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-19 23:50:34,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:50:34,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-19 23:50:34,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-19 23:50:34,338 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand 11 states. [2019-11-19 23:50:35,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:50:35,257 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2019-11-19 23:50:35,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-19 23:50:35,258 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2019-11-19 23:50:35,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:50:35,260 INFO L225 Difference]: With dead ends: 127 [2019-11-19 23:50:35,260 INFO L226 Difference]: Without dead ends: 127 [2019-11-19 23:50:35,260 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-11-19 23:50:35,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-19 23:50:35,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 81. [2019-11-19 23:50:35,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-19 23:50:35,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2019-11-19 23:50:35,267 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 19 [2019-11-19 23:50:35,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:50:35,267 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2019-11-19 23:50:35,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-19 23:50:35,268 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2019-11-19 23:50:35,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-19 23:50:35,269 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:50:35,269 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:50:35,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:50:35,473 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-19 23:50:35,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:50:35,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1454840270, now seen corresponding path program 1 times [2019-11-19 23:50:35,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:50:35,474 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1732198081] [2019-11-19 23:50:35,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5eab5a70-74fc-49c8-b2a9-7a9d25235ff0/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 [2019-11-19 23:50:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 23:50:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 23:50:35,852 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-19 23:50:35,853 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-19 23:50:36,053 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:50:36,071 WARN L417 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2019-11-19 23:50:36,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 11:50:36 BoogieIcfgContainer [2019-11-19 23:50:36,099 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 23:50:36,101 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 23:50:36,102 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 23:50:36,102 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 23:50:36,103 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:50:21" (3/4) ... [2019-11-19 23:50:36,107 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-19 23:50:36,107 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 23:50:36,109 INFO L168 Benchmark]: Toolchain (without parser) took 16109.92 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 196.6 MB). Free memory was 940.7 MB in the beginning and 926.6 MB in the end (delta: 14.1 MB). Peak memory consumption was 210.7 MB. Max. memory is 11.5 GB. [2019-11-19 23:50:36,110 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 23:50:36,111 INFO L168 Benchmark]: CACSL2BoogieTranslator took 676.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.9 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -196.2 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-11-19 23:50:36,115 INFO L168 Benchmark]: Boogie Preprocessor took 117.06 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. [2019-11-19 23:50:36,115 INFO L168 Benchmark]: RCFGBuilder took 1095.35 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: 54.6 MB). Peak memory consumption was 54.6 MB. Max. memory is 11.5 GB. [2019-11-19 23:50:36,116 INFO L168 Benchmark]: TraceAbstraction took 14209.77 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 36.7 MB). Free memory was 1.1 GB in the beginning and 926.6 MB in the end (delta: 150.4 MB). Peak memory consumption was 187.1 MB. Max. memory is 11.5 GB. [2019-11-19 23:50:36,116 INFO L168 Benchmark]: Witness Printer took 5.95 ms. Allocated memory is still 1.2 GB. Free memory is still 926.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 23:50:36,129 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 676.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.9 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -196.2 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 117.06 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 1095.35 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: 54.6 MB). Peak memory consumption was 54.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 14209.77 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 36.7 MB). Free memory was 1.1 GB in the beginning and 926.6 MB in the end (delta: 150.4 MB). Peak memory consumption was 187.1 MB. Max. memory is 11.5 GB. * Witness Printer took 5.95 ms. Allocated memory is still 1.2 GB. Free memory is still 926.6 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 a = (List) malloc(sizeof(struct node)); VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}] [L522] COND FALSE !(a == 0) VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}] [L523] List t; [L524] List p = a; VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}] [L525] COND FALSE !(__VERIFIER_nondet_int()) [L532] COND FALSE !(__VERIFIER_nondet_int()) [L539] p->h = 3 VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}] [L540] p = a VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}] [L541] EXPR p->h VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, p->h=3] [L541] COND FALSE !(p->h == 1) [L543] EXPR p->h VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, p->h=3] [L543] COND FALSE !(p->h == 2) [L545] EXPR p->h VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, p->h=3] [L545] COND FALSE !(p->h != 3) [L547] return 0; VAL [\result=0, a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 86 locations, 25 error locations. Result: UNSAFE, OverallTime: 14.1s, OverallIterations: 9, TraceHistogramMax: 2, AutomataDifference: 7.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 318 SDtfs, 1024 SDslu, 1030 SDs, 0 SdLazy, 1418 SolverSat, 184 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 280 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 219 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 146 NumberOfCodeBlocks, 146 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 236 ConstructedInterpolants, 0 QuantifiedInterpolants, 18044 SizeOfPredicates, 64 NumberOfNonLiveVariables, 496 ConjunctsInSsa, 67 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 16/16 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...